ATA5811-PLQX Atmel, ATA5811-PLQX Datasheet
ATA5811-PLQX
Specifications of ATA5811-PLQX
Related parts for ATA5811-PLQX
ATA5811-PLQX Summary of contents
Page 1
... Mode, Delivering of Clock, Reset, Low Battery Indication and Complete Handling of Receive/Transmit Protocol and Polling • Single-ended Design with High Isolation of PLL/VCO from PA and the Power Supply Allows a Loop Antenna in the Key Fob to Surround the Whole Application UHF ASK/FSK Transceiver ATA5811 ATA5812 Preliminary Rev. 4689B–RKE–04/04 ...
Page 2
... ASK transmission. The device supports data rates of 1 kBaud to 20 kBaud (FSK) and 1 kBaud to 10 kBaud (ASK) in Manchester, Bi-phase and other codes in transparent mode. The ATA5811 can be used in the 433 MHz to 435 MHz and the 868 MHz to 870 MHz band, the ATA5812 in the 314 MHz to 316 MHz band ...
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... ATA5811/ATA5812 [Preliminary] Figure 2. Pinning QFN48 RF_IN 433_N868 6 ATA5811/ATA5812 NC 7 R_PWR 8 PWR_H 9 RF_OUT Pin Description Pin Symbol Function 1 NC Not connected 2 NC Not connected 3 NC Not connected 4 RF_IN RF input 5 NC Not connected 6 433_N868 Selects RF input/output frequency range 7 NC Not connected ...
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... ATA5811/ATA5812 [Preliminary] 4 Pin Description (Continued) Pin Symbol Function 19 VAUX Auxiliary supply voltage input 20 TEST1 Test input, at GND during operation 21 DVCC Blocking of the digital voltage supply 22 VSOUT Output voltage power supply for external devices 23 TEST2 Test input, at GND during operation 24 XTAL1 Reference crystal ...
Page 5
... CDEM RSSI XTAL1 XTAL2 DEM_OUT CLK N_RESET IRQ Microcontroller Interface CS SCK SDI_TMDI SDO_TMDO 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Digital Control Logic Frontend Enable PA_Enable (ASK) TX_DATA (FSK) RX/TX Fract.-N- FREQ 9 Frequency FREF Synthesizer TX/RX - Data Buffer Control Register Signal Status Register ...
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... RKE uni-directional systems. The ATA5811/ATA5812 provides sufficient isolation and robust pulling behavior of internal circuits from the supply voltage as well as an integrated VCO inductor to allow this. ...
Page 7
... Figure 5. Typical RKE Car or Sensor Base-station Application, 433.92 MHz SAW-Filter AVCC connector RF C OUT 10 Typical Car or Sensor Base-station Application 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary RF_IN 433_N868 ATA5811/ATA5812 R_PWR PWR_H RF_OUT VCC = 4.75 V..5.25 V Figure 5 shows a typical 433.92 MHz V station application. The external components are 12 capacitors, 1 resistor, 4 inductors, a SAW filter and a crystal ...
Page 8
... Figure 6. Typical RKE Key Fob Application, 433.92 MHz, 2 Batteries L AVCC Loop antenna Typical Key Fob Application, 2 Batteries ATA5811/ATA5812 [Preliminary RF_IN 433_N868 ATA5811/ATA5812 R_PWR PWR_H RF_OUT Litihum Cells + Figure 6 shows a typical 433.92 MHz 2-battery RKE key fob or sensor application. The external components are 11 capacitors, 1 resistor, 2 inductors and a crystal. C are 68 nF voltage supply blocking capacitors ...
Page 9
... RF Transceiver Low-IF Receiver 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] According to Figure 3 on page 5, the RF transceiver consists of an LNA (Low-Noise Amplifier), PA (Power Amplifier), RX/TX switch, fractional-N frequency synthesizer and the signal processing part with mixer, IF filter, IF amplifier, FSK/ASK demodulator, data filter and data slicer. ...
Page 10
... Input Matching at RF_IN ATA5811/ATA5812 [Preliminary] 10 The measured input impedances as well as the values of a parallel equivalent circuit of these impedances can be seen in Table 1. The highest sensitivity is achieved with power matching of these impedances to the source impedance Table 1. Measured Input Impedances of the RF_IN Pin f /MHz ...
Page 11
... ATA5811/ATA5812 [Preliminary] BR_Range_0 BR_Range_1 2.4 kBaud 5.0 kBaud -110.5 dBm -109.0 dBm -109.5 dBm -108.0 dBm -106.5 dBm -105.5 dBm BR_Range_0 BR_Range_1 2.4 kBaud 5.0 kBaud -117 ...
Page 12
... XTAL and XTO tolerances. Note: For the demodulator used in the ATA5811/ATA5812, the tolerable frequency offset does not change with the data frequency, hence, the value of ±58 kHz is valid for kBaud. ...
Page 13
... ATA5811/ATA5812 [Preliminary] Figure 9 shows narrow band blocking and Figure 10 wide band blocking characteristics kBaud/ 16 kHz/Manchester with a level of -106 dBm + -103 dBm which above the sensitivity level. The figures show how much a continuous wave signal can be larger than -103 dBm until the BER is higher than 10 ...
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... MHz +10 MHz -10 MHz The ATA5811/ATA5812 can also receive FSK and ASK modulated signals if they are much higher than the I1dBCP. It can typically receive useful signals at 10 dBm. This is often referred to as the nonlinear dynamic range which is the maximum to minimum receiving signal which is 116 dB for 20 kBaud Manchester. This value is useful if two transceivers have to communicate and are very close to each other ...
Page 15
... RSSI Output Frequency Synthesizer 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] The data filter of the ATA5811/ATA5812 implies a quasi peak detector. This results in a good suppression of the above mentioned disturbers and exhibits a good carrier to Gaussian noise performance. The required useful signal to disturbing signal ratio ...
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... Center 433.92 MHz Res BW 100 kHz ATA5811/ATA5812 [Preliminary] 16 The initial tolerances of the crystal oscillator due to crystal tolerances, internal capacitor tolerances and the parasitics of the board have to be compensated at manufacturing setup with control registers 2 and 3 as can be seen in Table 12 on page 24. The other control words for the synthesizer needed for ASK, FSK and receive/transmit switching are calculated internally ...
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... Figure 15. FSK-modulated TX Spectrum (20 kBaud/ 16.17 kHz/Manchester Code) Ref 10 dBm Samp Log 10 dB/ VAvg Center 433.92 MHz Res BW 10 kHz 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] FSK_L Atten 20 dB VBW 10 kHz Atten 20 dB VBW 10 kHz Span 1 MHz Sweep 27.5 ms (401 pts) Span 1 MHz Sweep 27.5 ms (401 pts) 17 ...
Page 18
... Output Power Setting and PA Matching at RF_OUT ATA5811/ATA5812 [Preliminary] 18 The Power Amplifier (PA single-ended open collector stage which delivers a cur- rent pulse which is nearly independent of supply voltage, temperature and tolerances due to bandgap stabilization. Resistor R current which controls the current in the PA. A higher resistor value results in a lower reference current, a lower output power and a lower current consumption of the PA ...
Page 19
... Output Power and TX Supply Current versus Supply Voltage and Temperature 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Figure 16. Power Setting and Output Matching AVCC RF OUT C 3 VPWR_H VPWR_H 0.4 56 5.7 27 10 ...
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... RX/TX Switch ATA5811/ATA5812 [Preliminary Table 8. Measured Output Power and Supply Current at 433.92 MHz, PWR_H = GND VS = 2.4 V 10. -40°C amb 3.8 dBm 10. +25°C amb 4.6 dBm 11 +105°C amb 3.8 dBm Table 9 shows the relative changes of the output power of a typical device compared to 3.0 V/25° ...
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... Matching Network in TX Mode Matching Network in RX Mode In RX mode the RF_OUT pin has a high impedance of about parallel with 1.0 pF 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Figure 17. Equivalent Circuit of the Switch 2 mode the 20 mm long and 0.4 mm wide transmission line which is much shorter ...
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... XTO ATA5811/ATA5812 [Preliminary Table 11. Impedance RF_OUT Pin in RX Mode Frequency MHz 315 MHz 433.92 MHz 868.3 Note that if matching like in Figure 5 on page 7, a high Q wire wound inductor with a Q > 70 should be used for L otherwise be dominant. The RX and TX losses will be in the range of 1.0 dB there. ...
Page 23
... ATA5811/ATA5812 [Preliminary] With C 14 fF, C 1.5 pF and 100 ppm and with C 7 fF, C ± m pulling ppm. ± Since typical crystals have less than ±50 ppm tolerance at 25° the compensation is not critical the XTAL has to be lower than C ...
Page 24
... In IDLE mode and during Sleep mode (RX_Polling) the switches S1 and S2 are open. Table 12. Calculation Pin 6 Frequency (MHz) 433_N868 433.92 AVCC 868.3 GND 315.0 AVCC ATA5811/ATA5812 [Preliminary] 24 XTAL2 f XTO Baud1 To find the right values used in the control registers 2 and 3 (see Table 20 on page 35 and Table 23 on page 36) the relationship between f Table 12 ...
Page 25
... Register 3) Basic Clock Cycle of the Digital Circuitry 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] The variable FREQ depends on FREQ2 and FREQ3, which are defined by the bits FR0 to FR8 in control register 2 and 3 and is calculated as follows: FREQ = 3584 + FREQ2 + FREQ3 Only the range of FREQ = 3803 to 4053 of this register should be used because other- ...
Page 26
... Register) OUT EN The supply voltage range of the ATA5811/ATA5812 6.6 V. Pin VS1 is the supply voltage input for the range 2 3.6 V and is used in battery applications using a single lithium 3 V cell. Pin VS2 is the voltage input for the range 4 6 Battery Application and Car Applications) in this case the voltage regu- lator V_REG1 regulates VS1 to typically 3. the voltage regulator is active a blocking capacitor of 2.2 µ ...
Page 27
... ATA5811/ATA5812 [Preliminary] AVCC is the internal operation voltage of the RF transceiver and is feed via the switch SW_AVCC by VS1. AVCC must be blocked with capacitor (see Figure 4 on page 6, Figure 5 on page 7 and Figure 6 on page 8). DVCC is the internal operation voltage of the digital control logic and is feed via the switch SW_DVCC by VS1 or VSOUT ...
Page 28
... TX Mode Polling Mode Mode TX Mode AVCC = VS1 DVCC = VS1 VSOUT = VS1 or V_REG2 OPM1 = 1 and OPM0 = 1 OFF Mode ATA5811/ATA5812 [Preliminary] 28 OFF Mode AVCC = OFF DVCC = OFF VSOUT = OFF V < VS1+0.5 V IDLE Mode VAUX AVCC = VS1 DVCC = VS1 V > VS1+0.5 V VSOUT = V_REG2 ...
Page 29
... Idle Mode Reset Timing and Reset Logic If the transceiver is switched on (OFF mode to Idle mode, OFF mode to AUX mode) 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] The transceiver changes from OFF mode to AUX mode if the voltage at pin VAUX V > 3.5 V (typically). In AUX mode DVCC and VSOUT are connected to the auxil- VAUX iary power supply input (VAUX) via the voltage regulator V_REG2 ...
Page 30
... VSOUT DVCC (AVCC) DVCC_RESET N_RESET Low_Batt (Status Register) VSOUT_EN (Control Register 3) CLK ATA5811/ATA5812 [Preliminary drops below V (typically 2.3 V), N_RESET is set to low. If bit VSOUT_EN VSOUT Thres_1 in control register DVCC_RESET is also generated abled by the connected micr ocontroller by setting bit VSOUT_EN = 0, no DVCC_RESET is generated. ...
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... Figure 24. Reset Logic, SR Latch Generates the Hysteresis in the NRESET Signal DVCC_OK and XTO_OK VSOUT_OK LOW_BATT 1-Battery Application 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] VSOUT_EN S and R The supply voltage range is 2 3.6 V and VAUX is not used. Figure 25. 1-Battery Application ATA5811/ATA5812 VS1 VS2 VAUX ...
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... Application Microcontroller Interface Digital Control Logic Register Structure ATA5811/ATA5812 [Preliminary] 32 The supply voltage range is 4 6.6 V and VAUX is connected to an inductive supply. Figure 26. 2-Battery Application with Inductive Emergency Supply ATA5811/ATA5812 VS1 VS2 VAUX RF - Transceiver AVCC Digital Control DVCC Logic VSOUT ...
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... Lim_min4 Baud1 Baud0 Lim_max5 Lim_max4 ST5 ST4 ST3 ST2 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] After the transceiver is turned on via pin PWR_ON = High Low Low Low Low Low or the voltage at pin VAUX V control registers are in the default state. LSB T_MODE FS - OPM 1 OPM 0 ...
Page 34
... Pin IRQ is set bytes still are in the TX/RX data buffer or the TX data buffer empty (default Pin IRQ is set the TX data buffer is empty Table 16. Control Register 1 (Function of Bit 5) AVCC_EN Function 0 (default) 1 Enables AVCC, if the ATA5811/ Table 17. Control Register 1 (Function of Bit 4) FS Function 0 433/868 MHz 1 315 MHz ATA5812 is in AUX mode 4689B–RKE–04/04 ...
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... Control Register 2 (ADR 1) 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Table 18. Control Register 1 (Function of Bit 2 and Bit 1) OPM1 OPM0 Function 0 0 Idle mode (default mode polling mode mode Table 19. Control Register 1 (Function of Bit 0) T_MODE Function 0 TX and RX function via TX/RX data buffer (default) ...
Page 36
... Table 27. Control Register 4 (Function of Bit 6, Bit 5, Bit 4, Bit 3 and Bit 2) Sleep4 Sleep3 Sleep2 ATA5811/ATA5812 [Preliminary] 36 Table 23. Control Register 3 (Function of Bit 3 and Bit 2) FR8 FR7 Function 0 0 FREQ3 = FREQ3 = 128 1 0 FREQ3 = 256 (default FREQ3 = 384 Note: Tuning of f MSB’s RF Table 24. Control Register 3 (Function of Bit 1) ...
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... Table 31. Control Register 5 (Function of Bit 5, Bit 4, Bit 3, Bit 2, Bit 1 and Bit Mode) Lim_min5 Lim_min4 Lim_min3 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Table 28. Control Register 4 (Function of Bit 1) XSleep Function extended T Sleep extended T Sleep Table 29. Control Register 4 (Function of Bit 0) XLim Function extended TLim_min, TLim_max off (default) Lim extended T Lim Lim_min Table 30 ...
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... Control Register 6 (ADR 5) Table 34. Control Register 6 (Function of Bit 5, Bit 4, Bit 3, Bit 2, Bit 1 and Bit 0) Lim_max5 Lim_max4 Lim_max3 ATA5811/ATA5812 [Preliminary] 38 Lim_min2 Lim_min1 Lim_min0 Table 33. Control Register 6 (Function of Bit 7 and Bit 6) Baud1 Baud0 Function Baud-rate range 0 (B0) 1.0 kBaud to 2.5 kBaud XDCLK Baud-rate range 1 (B1) 2.0 kBaud to 5.0 kBaud; ...
Page 39
... Status Register Status Register (ADR 8) 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] The status register indicates the current status of the transceiver and is readable via the 4-wire serial interface. Setting Power_On or P_On_Aux or an event on ST1, ST2, ST3, ST4 or ST5 is indicated by an IRQ. Reading the status register resets the bits Power_On, Low_Batt, P_On_Aux and the IRQ Table 35 ...
Page 40
... V (typ) DVCC, AVCC N_RESET CLK STn (Status Register) IRQ OFF Mode ATA5811/ATA5812 [Preliminary switch the transceiver from OFF to Idle mode, pin Tn must set to 0 (maximum 0 for at least T (see Figure 28). The transceiver recognize the negative VS2 Tn_IRQ edge, sets pin N_RESET to low and switches on DVCC, AVCC and the power supply for external devices VSOUT ...
Page 41
... Tn = STn ? Stop debounce counter 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] If the transceiver is in any active mode (Idle, AUX, TX, RX, RX_Polling), an integrated debounce logic is active. If there is an event on pin Tn a debounce counter is set and started. The status is updated, an interrupt is issued and the debounce ...
Page 42
... V (typ) DVCC, AVCC N_RESET CLK Power_On (Status Register) IRQ OFF Mode ATA5811/ATA5812 [Preliminary switch the transceiver from OFF to Idle mode, pin PWR_ON must set to 1 (minimum 0 for at least T (see Figure 30). The transceiver recognize the positive VS2 PWR_ON edge, sets pin N_RESET to low and switches on DVCC, AVCC and the power supply for external devices VSOUT ...
Page 43
... Low Battery Indicator 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] The status bit Low_Batt is set the voltage on pin VSOUT V 2.38 V (typically). Low_Batt is set exceeds V VSOUT 4-wire serial interface (see Figure 23 on page 30). Figure 31. Timing Status Bit Low_Batt IDLE, AUX, TX Polling Mode V VSOUT Read Status Register ...
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... CLK P_On_Aux (Status Register) IRQ OFF Mode ATA5811/ATA5812 [Preliminary switch the transceiver from OFF to AUX mode, the voltage on pin VAUX V exceed 3.5 V (typically) (see Figure 32 set to low, DVCC and the power supply for external devices VSOUT are switched on exceeds 3.5 V (typically) the status bit P_On_Aux is set to 1 and an interrupt is VAUX issued ...
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... Nr. Bytes in the TX/RX Data Buffer SCK CS 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] The configuration of the transceiver takes place via a 4-wire serial interface (CS, SCK, SDI_TMDI, SDO_TMDO) and is organized in 8-bit units. The configuration is initiated with a 8-bit command. While shifting the command into pin SDI_TMDI, the number of bytes in the TX/RX data buffer are available on pin SDO_TMDO ...
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... Nr. Bytes in the TX/RX Data Buffer SCK CS Command: OFF Command Command: Delete IRQ Command Structure ATA5811/ATA5812 [Preliminary] 46 The control registers can be written individually or successively. An echo of the com- mand and the data bytes are provided for the microcontroller on pin SDO_TMDO. LSB MSB Data Control Register X ...
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... Serial Interface Figure 39. Serial Timing CS T SCK_setup1 X SCK SDI_TMDI X SDO_TMDO X can be either V 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] . Table 36. Command Structure MSB Command Bit 7 Read TX/RX data buffer 0 Write TX/RX data buffer 0 Read control/status register 0 Write control register 0 OFF command 1 Delete IRQ ...
Page 48
... Operation Modes RX Operation RX Polling Mode ATA5811/ATA5812 [Preliminary] 48 The transceiver is set to RX operation with the bits OPM0 and OPM1 in control register 1 . Table 37. Control Register 1 OPM1 1 1 The transceiver is designed to consume less than operation while being sensitive to signals from a corresponding transmitter. This is achieved via the polling cir- cuit ...
Page 49
... Sleep Mode Start-up Mode 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] To save current it is recommended CLK and V mode. I does not include the current of the Microcontroller_Interface I P rent of an external device connected to pin VSOUT (e.g., microcontroller). If CLK and/or VSOUT is enabled during RX polling mode the current consumption is calculated ...
Page 50
... YES SLEEP ? YES Receiving mode: The incomming data stream is passed via the TX/RX Data Buffer to the connected microcontroller bit error occurs the transceiver is set back to Start-up mode. Output level on pin RX_ACTIVE -> High RX_X ATA5811/ATA5812 [Preliminary IDLE_X X Sleep = Startup_PLL_X Startup_PLL = I S RX_X NO ...
Page 51
... SLEEP ? YES Receiving mode: The incomming data stream is passed via pin SDO_TMDO to the connected microcontroller bit error occurs the transceiver is not set back to Start-up mode. Output level on Pin RX_ACTIVE -> High RX_X 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary IDLE_X X Sleep = Startup_PLL_X Startup_PLL = I S RX_X > ...
Page 52
... Bit check Demod_Out T Startup_Sig_Proc Start-up mode ATA5811/ATA5812 [Preliminary Bit-check mode the incoming data stream is examined to distinguish between a valid signal from a corresponding transmitter and signals due to noise. This is done by subse- quent time frame checks where the distance between 2 signal edges are continuously compared to a programmable time window ...
Page 53
... T Startup_Sig_Proc Start-up mode 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] For the best noise immunity it is recommended to use a low span between This is achieved using a fixed frequency at a 50% duty cycle for the transmitter Lim_max preburst. A '11111...' or a '10101...' sequence in Manchester or Bi-phase is a good choice concerning that advice ...
Page 54
... Figure 46. Timing Diagram for Failed Bit-check (Condition: CV_Lim (Lim_min = 14, Lim_max = 24) RX_ACTIVE Bit check Demod_Out Bit-check counter 0 T Startup_Sig_Proc Start-up mode Duration of the Bit-check ATA5811/ATA5812 [Preliminary] 54 Bit check failed (CV_Lim < Lim_min) 1/2 Bit 101112 T Bit-check Bit-check mode Bit check failed (CV_Lim >= Lim_min) 1/2 Bit 101112 ...
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... Figure 47. Receiving Mode (TMODE = 1) Bit check ok Demod_Out '0' '0' '0' '0' '0' '0' '0' '0' '0' '1' SDO_TMDO Bit-check mode 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] In the presence of a valid transmitter signal, T that signal and the count of the bits, N Sig results in a longer period for T Bit-check burst T ...
Page 56
... Demod_Out 0 0 Bit-check mode ATA5811/ATA5812 [Preliminary the TX/RX data buffer control logic detects the start bit, the data stream is written in the TX/RX data buffer byte by byte. The start bit is part of the first data byte and must be different from the bits of the preburst. If the preburst consists of a sequence of '00000...', the start bit must ...
Page 57
... Lim_max = 38 (744 µs) 433.92 Lim_min = 13 (251 µs) (13.25311) Lim_max = 38 (715 µs) 868.3 Lim_min = 13 (248 µs) (13.41191) Lim_max = 38 (706 µs) 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Bit error Byte n Byte n+1 Receiving mode Start-up mode Table 38. RX Modulation Scheme Mode ASK/_NFSK T_MODE 0 ...
Page 58
... TX Operation ATA5811/ATA5812 [Preliminary] 58 The transceiver is set to TX operation by using the bits OPM0 and OPM1 in the control register 1. Table 40. Control Register 1 OPM1 0 Before activating TX mode, the TX parameters (baud rate, modulation scheme ... ) must be selected as illustrated in Figure 50 on page 59. The baud rate depends on Baud 0 and Baud 1 in control register 6, Lim_min0 to Lim_min5 in control register 5 and XLIM in control register 4 (see section “ ...
Page 59
... Figure 50. TX Operation (T_MODE = 0) Command: Delete_IRQ N Pin IRQ = Write Control Register 1 OPM1, OPM0: Set IDLE 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Write Control Register 6 Baud1, Baud0: Select Baudrate Range Lim_max0 ... Lim_max5: Don't care Write Control Register 5 Lim_min0 ... Lim_min5: Select the baud rate ...
Page 60
... CLK_ON: Write Control Register 2 FR0 ...FR6: P_mode: Write Control Register 1 IR1, IR0: AVCC_EN: FS: OPM1, OPM0: T_mode: Write Control Register 1 OPM1, OPM0: ATA5811/ATA5812 [Preliminary] 60 Don't care Select modulation Don't care Don't care Adjust f RF Set VSOUT_EN = 1 Don't care Adjust f RF Don't care ...
Page 61
... Table 41. TX Modulation Schemes Mode ASK/_NFSK Interrupts 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Bit in TX/RX P_Mode T_Mode Data Buffer Via pin IRQ, the transceiver signals different operating conditions to a connected micro- controller specific operating condition occurs, pin IRQ is set to high level interrupt occurs it is recommended to delete the interrupt be immediately deleted by reading the status register, thus the next possible interrupt doesn’ ...
Page 62
... Supply voltage VS1 Supply voltage VAUX Supply voltage VSINT ESD (Human Body Model ESD S 5.1) every pin ESD (Machine Model JEDEC A115A) every pin Maximum input level, input matched to 50 Thermal Resistance Parameters Junction ambient ATA5811/ATA5812 [Preliminary] 62 Symbol Min -55 stg T -40 ...
Page 63
... Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb = 5.25 V (car application). Typical values are given ...
Page 64
... Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. ATA5811/ATA5812 [Preliminary -40°C to +105°C, V amb = ...
Page 65
... Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb = 5.25 V (car application). Typical values are given ...
Page 66
... Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. ATA5811/ATA5812 [Preliminary -40°C to +105°C, V amb = ...
Page 67
... Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb = 5.25 V (car application). Typical values are given ...
Page 68
... Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. ATA5811/ATA5812 [Preliminary -40°C to +105°C, V amb = ...
Page 69
... Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb = 5.25 V (car application). Typical values are given ...
Page 70
... Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. ATA5811/ATA5812 [Preliminary -40°C to +105°C, V amb = ...
Page 71
... Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb = 5.25 V (car application). Typical values are given ...
Page 72
... Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. ATA5811/ATA5812 [Preliminary -40°C to +105°C, V amb = ...
Page 73
... Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb = 5.25 V (car application). Typical values are given ...
Page 74
... Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. Pin numbers in brackets mean they were measured with RF_IN matched to 50 component values according to Table 2 on page 10 and RF_OUT matched to 50 component values according to Table 7 on page 19. ATA5811/ATA5812 [Preliminary -40°C to +105°C, V amb = ...
Page 75
... PWR_H = AVCC mode) *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. The voltage of VAUX may rise The current I 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb = 5.25 V (car application). Typical values are given VS2 VAUX = 433 ...
Page 76
... VS1and VS2 I VSOUT Supply current CLK enabled 9.12 RX mode V *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. The voltage of VAUX may rise The current I ATA5811/ATA5812 [Preliminary -40°C to +105°C, V amb Pin Symbol = V 2.6 V VS1 VS2 (1) 13.5 mA ...
Page 77
... CLK enabled Supply current V 9.17 TX mode CLK disabled V *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. The voltage of VAUX may rise The current I 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb Pin Symbol = VS1 VS2 17 Startup_PLL_VS1, 2 ...
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... Current in RX mode 10.10 I VSOUT on pin VS2 *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. The voltage of VAUX may rise The current I ATA5811/ATA5812 [Preliminary -40 °C to +105 °C, V amb = 315.0MHz/433.92 MHz/868.3 MHz unless otherwise RF Pin Symbol 17 4.4 V ...
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... V 10.16 TX mode CLK disabled V *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note: 1. The voltage of VAUX may rise The current I 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40 °C to +105 °C, V amb = 315.0MHz/433.92 MHz/868.3 MHz unless otherwise RF Pin Symbol 17, enabled 22, 27 ...
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... I VSOUT on pin VS2 and VAUX Supply current in RX CLK enabled V 11.10 mode enabled *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATA5811/ATA5812 [Preliminary -40°C to +105°C, V amb = 315.0 MHz/433.92 MHz/868.3 MHz unless otherwise RF Pin Symbol 17, V VS2 ...
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... VS2 and VAUX 433.92 MHz/5dBm 433.92 MHz/10dBm 868.3 MHz/10dBm CLK enabled Supply current in V 11.15 TX mode CLK disabled V *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C, V amb RF Pin Symbol I Startup_PLL_VS2_ = 0 17 ...
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... Figure 43 on page 52) Bit-check time for a valid input signal f N Bit-check N Bit-check N Bit-check N Bit-check *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATA5811/ATA5812 [Preliminary -40°C to +105°C. V amb = 4. 5.25 V (car application), typical values Pin Symbol T DCLK T XDCLK T ...
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... SCK SDO_TMDO disable 15.7 time from falling edge of CS 15.8 CS disable time period *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C. V amb = 4. 5.25 V (car application), typical values Pin Symbol BR_Range 31 ...
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... C 3 page 42 2-battery application Car application Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATA5811/ATA5812 [Preliminary -40°C to +105°C. V amb = 4. 5.25 V (car application), typical values Pin Symbol 33 SCK_setup1 33 SCK_setup2 33 SCK_hold = 4..7 fF (typ. 5 fF) < 2.2 pF (typ. 1.8 pF) 120 (typ ...
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... C 5 Push button debounce Every mode except 16.4 time OFF mode *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40°C to +105°C. V amb = 4. 5.25 V (car application), typical values Pin Symbol 29 PWR_ON_IRQ_2 = 4..7 fF (typ 5 fF) < ...
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... Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note logic high level is applied to this pin a minimum serial impedance of 100 temperature range. ATA5811/ATA5812 [Preliminary -40 °C to +105 °C, V amb VS1 = 4. 5.25 V (Car Application) typical values at ...
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... DEM_OUT *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter Note logic high level is applied to this pin a minimum serial impedance of 100 temperature range. 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] = -40 °C to +105 °C, V amb = 4. 5.25 V (Car Application) typical values Pin Symbol ...
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... Ordering Information Extended Type Number ATA5811-PLQC ATA5812-PLQC Package Information ATA5811/ATA5812 [Preliminary] 88 Package Remarks QFN48 QFN48 4689B–RKE–04/04 ...
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... Table of Contents 4689B–RKE–04/04 ATA5811/ATA5812 [Preliminary] Features ................................................................................................. 1 Applications .......................................................................................... 1 Benefits .................................................................................................. 1 General Description .............................................................................. 2 Pin Description ..................................................................................... 3 Application Circuits .............................................................................. 6 Typical Key Fob or Sensor Application with 1 Battery ..........................................6 Typical Car or Sensor Base-station Application ...................................................7 Typical Key Fob Application, 2 Batteries ..............................................................8 RF Transceiver .....................................................................................................9 XTO ....................................................................................................................22 Power Supply ......................................................................................................26 Microcontroller Interface .....................................................................................32 Digital Control Logic ............................................................................................32 Transceiver Configuration ...
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... No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. ...