ATA5811_06 ATMEL [ATMEL Corporation], ATA5811_06 Datasheet
ATA5811_06
Related parts for ATA5811_06
ATA5811_06 Summary of contents
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Features • High FSK Sensitivity: –106 dBm at 20 Kbit/s/–109.5 dBm at 2.4 Kbit/s (433.92 MHz) • High ASK Sensitivity: –112.5 dBm at 10 Kbit/s/–116.5 dBm at 2.4 Kbit/s (433.92 MHz) • Low Supply Current: 10 and ...
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Applications • Automotive Keyless Entry and Passive Entry Go Systems • Access Control Systems • Remote Control Systems • Alarm and Telemetry Systems • Energy Metering • Home Automation Benefits • No SAW Device Needed in Key Fob Designs to ...
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Figure 1-1. System Block Diagram Antenna Matching Figure 1-2. 4689F–RKE–08/06 ATA5811/ATA5812 RF transceiver Digital control logic Microcontroller XTO Pinning QFN48 RF_IN 433_N868 6 ATA5811/ATA5812 NC 7 ...
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Table 1-1. Pin Description Pin Symbol RF_IN 433_N868 R_PWR 9 PWR_H 10 RF_OUT AVCC 17 VS2 ...
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Table 1-1. Pin Description (Continued) Pin Symbol RX_ACTIVE GND Figure 1-3. Block Diagram 433_N868 RF transceiver R_PWR RF_OUT PA PWR_H RX_TX1 TX RX_TX2 LNA RF_IN CDEM RSSI ...
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Typical Key Fob or Sensor Application with 1 Battery Figure 2-1. Typical RKE Key Fob or Sensor Application, 433.92 MHz, 1 Battery AVCC Loop antenna Figure 2-1 external components are 11 capacitors, ...
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Typical Car or Sensor Base-station Application Figure 3-1. Typical RKE Car or Sensor Base-station Application, 433.92 MHz SAW-Filter C AVCC connector OUT Figure 3-1 application. The ...
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Typical Key Fob Application, 2 Batteries Figure 4-1. Typical RKE Key Fob Application, 433.92 MHz, 2 Batteries AVCC Loop antenna Figure 4-1 nal components are 11 capacitors, 1 resistor, 2 inductors and ...
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RF Transceiver According to PA (Power Amplifier), RX/TX switch, fractional-N frequency synthesizer and the signal process- ing part with mixer, IF filter, IF amplifier, FSK/ASK demodulator, data filter and data slicer. In receive mode the LNA pre-amplifies the received ...
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Input Matching at RF_IN The measured input impedances as well as the values of a parallel equivalent circuit of these impedances can be seen in of these impedances to the source impedance Table 5-1. The matching ...
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Table 5-3. Measured Sensitivity FSK, 16 kHz, Manchester, dBm, BER = 10 BR_Range_0 RF Frequency 1.0 Kbit/s 315 MHz –110.0 dBm 433.92 MHz –109.0 dBm 868.3 MHz –106.0 dBm Table 5-4. Measured Sensitivity 100% ASK, Manchester, dBm, BER = 10 ...
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As can be seen in perature has an influence of about +1.5/–0.7 dB and a frequency offset of ±65 kHz also influences by about ±1 dB. All these influences, combined with the sensitivity of a typical IC, are then within ...
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Blocking, Selectivity As can be seen in the sensitivity level in presence of very large blockers of –47 dBm/–34 dBm with small frequency offsets of ±1 ±10 MHz. Figure 5-3 measurements were done with a useful signal of433.92 MHz/FSK/20 ...
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Figure 5-5 selectivity and image rejection. This measurement was done 6 dB above the sensitivity level with a useful signal of 433.92 MHz/FSK/20 Kbit/s/±16 kHz/ Manchester with a level of –106 dBm + –100 dBm. The figure ...
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This high blocking performance makes it even possible for some applications using quarter wave whip antennas to use a simple LC band-pass filter instead of a SAW filter in the receiver ...
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Figure 5-6. 5.10 Frequency Synthesizer The synthesizer is a fully integrated fractional-N design with internal loop filters for receive and transmit mode. The XTO frequency f The bits FR0 to FR8 in control registers 2 and 3 (see page 36) ...
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Figure 5-7. FSK-modulated TX Spectrum (20 Kbit/s/ 16.17 kHz/Manchester Code) Ref 10 dBm Samp Log 10 dB/ VAvg Center 433.92 MHz Res BW 100 kHz Figure 5-8. Unmodulated TX Spectrum f Ref 10 dBm ...
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Figure 5-9. FSK-modulated TX Spectrum (20 Kbit/s/ 16.17 kHz/Manchester Code) Ref 10 dBm Samp Log 10 dB/ VAvg Center 433.92 MHz Res BW 10 kHz 5.12 Output Power Setting and PA Matching at RF_OUT ...
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Example: According to 11 dBm the overall current consumption is typically 17.8 mA hence the PA needs 17 6. 10. this mode which corresponds to an overall power amplifier efficiency of the PA of ...
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Table 5-7. Measured Output Power and Current Consumption with VS1 = VS2 = Frequency (MHz) TX Current (mA) Output Power (dBm 315 8.5 315 10.5 315 16.7 433.92 8.6 433.92 11.2 433.92 17.8 868.3 ...
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Table 5- amb 5.14 RX/TX Switch The RX/TX switch decouples the LNA from the mode, and directs the received power to the LNA in RX mode this, it has a low impedance ...
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Matching Network in TX Mode In TX mode the 20 mm long and 0.4 mm wide transmission line which is much shorter than /4 is approximately switched in parallel to the capacitor C C and C 8 antenna with ...
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XTO The XTO is an amplitude regulated Pierce oscillator type with integrated load capacitances ( with a tolerance of ±17%) hence C lation frequency f designing the system in terms of receiving and transmitting frequency offset the ...
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To ensure proper start-up behavior the small signal gain and thus the negative resistance pro- vided by this XTO at start is very large, for example oscillation starts up even in worst case with a crystal series resistance of 1.5 ...
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Figure 6-2. XTO Block Diagram XTAL1 IDLE mode and during Sleep mode (RX_Polling) the switches S1 and S2 are open. To find the right values used in the control registers 2 and ...
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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 ...
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The clock cycle of the Bit-check and the TX bit rate depends on the selected bit-rate range (BR_Range) which is defined in control register 6 (see is defined in control register 4 (see the following formulas for further reference: BR_Range ...
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The supply voltage range of the ATA5811/ATA5812 is 2.4V to 3.6V or 4.4V to 6.6V. Pin VS1 is the supply voltage input for the range 2.4V to 3.6V and is used in battery applications using a single lithium 3V cell. ...
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Figure 7-2. Flow Chart Operation Modes Bit AVCC_EN = 0 and OFF Command and Pin PWR_ON = 0 and Pin T1, T2, T3, T4 and Pin PWR_ON = 1 or Pin T1, T2, T3 IDLE ...
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AUX Mode The transceiver changes from OFF mode to AUX mode if the voltage at pin VAUX V (typically). In AUX mode DVCC and VSOUT are connected to the auxiliary power supply input (VAUX) via the voltage regulator V_REG2. ...
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The status bit Low_Batt is set the voltage at pin VSOUT V ically 2.38V). Low_Batt is set the 4-wire serial interface or N_RESET is set to low VSOUT trol register 3 ...
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Figure 7-4. 7.5 1-Battery Application The supply voltage range is 2.4V to 3.6V and VAUX is not used. Figure 7-5. ATA5811/ATA5812 32 Reset Logic, SR Latch Generates the Hysteresis in the NRESET Signal DVCC_OK and XTO_OK VSOUT_EN and VSOUT_OK LOW_BATT ...
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Application The supply voltage range is 4.4V to 6.6V and VAUX is connected to an inductive supply. Figure 7-6. 8. Microcontroller Interface The microcontroller interface is a level converter which converts all internal digital signals which are referred ...
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The RAM and the status information is stored as long as the transceiver is in any active mode (DVCC = VS1 or DVCC = V_REG2) and gets lost if the transceiver is in OFF mode (DVCC = OFF). After the ...
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TX/RX Data Buffer The TX/RX data buffer is used to handle the data transfer during RX and TX operations. 9.3 Control Register To use the transceiver in different applications it can be configured by a connected microcontrol- ler via ...
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Table 9-6. T_MODE 9.3.2 Control Register 2 (ADR 1) Table 9-7. FR6 Note: Table 9-8. P_MODE Table 9-9. P_MODE 9.3.3 Control Register 3 (ADR 2) Table 9-10. FR8 Note: ATA5811/ATA5812 ...
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Table 9-11. VSOUT_EN Note: Table 9-12. CLK_ON Note: 9.3.4 Control Register 4 (ADR 3) Table 9-13. ASK_NFSK Table 9-14. Control Register 4 (Function of Bit 6, Bit 5, Bit 4, Bit 3 and Bit 2) Sleep4 Sleep3 Sleep2 0 0 ...
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Control Register 5 (ADR 4) Table 9-17. BitChk1 Table 9-18. Control Register 5 (Function of Bit 5, Bit 4, Bit 3, Bit 2, Bit 1 and Bit Mode) Lim_min5 Lim_min4 Lim_min3 0 ...
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Control Register 6 (ADR 5) Table 9-20. Baud1 Table 9-21. Control Register 6 (Function of Bit 5, Bit 4, Bit 3, Bit 2, Bit 1 and Bit 0) Lim_max5 Lim_max4 Lim_max3 ...
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Status Register (ADR 8) Table 9-22. Status Bit ST5 ST4 ST3 ST2 ST1 Power_On Low_Batt P_On_Aux ATA5811/ATA5812 40 Status Register Function Status of pin T5 Pin ST5 = 1 Pin ST5 = 0 ...
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Pin Tn To switch the transceiver from OFF to Idle mode, pin Tn must set to 0 (maximum 0.2 at least T N_RESET to low and switches on DVCC, AVCC and the power supply for external devices VSOUT. If ...
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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 ...
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Pin PWR_ON To switch the transceiver from OFF to Idle mode, pin PWR_ON must set to 1 (minimum 0 for at least T VS2 N_RESET to low and switches on DVCC, AVCC and the power supply for ...
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Low Battery Indicator The status bit Low_Batt is set the voltage on pin VSOUT V (typically). Low_Batt is set interface (see Figure 9-5. ATA5811/ATA5812 44 exceeds V and the status register is ...
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Pin VAUX To switch the transceiver from OFF to AUX mode, the voltage on pin VAUX V 3.5V (typically) (see DVCC and the power supply for external devices VSOUT are switched on VAUX After the voltage on ...
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Transceiver Configuration 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, ...
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Command: Read Control/Status Register The control and status registers can be read individually or successively. Figure 10-3. Read Control/Status Register MSB SDI_TMDI Command: Read C/S Register X SDO_TMDO Nr. Bytes in the TX/RX Data Buffer SCK CS 10.4 Command: ...
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Command: Delete IRQ The delete IRQ command sets pin IRQ to low. Figure 10-6. Delete IRQ 10.7 Command Structure The three most significant bits of the command (Bit 5 to Bit 7) indicates the command type. Bit 0 to ...
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Figure 10-7. Serial Timing SCK_setup1 SCK X T SDI_TMDI X T SDO_TMDO X can be either V 11. Operation Modes 11.1 RX Operation The transceiver is set to RX operation with the bits OPM0 and OPM1 in ...
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RX Polling Mode If the transceiver polling mode it stays in a continuous cycle of three different modes. In sleep mode the RF transceiver is disabled for the time period ...
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Figure 11-1. Flow Chart Polling Mode/RX Mode (T_MODE = 1, Transparent Mode Inactive) Start RX Polling Mode Sleep mode: All circuits for analog signal processing are disabled. Only XTO and Polling logic is enabled. Output level on pin RX_ACTIVE Low; ...
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Figure 11-2. Flow Chart Polling Mode/RX Mode (T_MODE = 1, Transparent Mode Active) Start RX Polling Mode Sleep mode: All circuits for analog signal processing are disabled. Only XTO and Polling logic is enabled. Output level on pin RX_ACTIVE Low; ...
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Bit-check Mode In 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 subsequent time frame checks where the distance between 2 ...
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For the best noise immunity it is recommended to use a low span between T This is achieved using a fixed frequency at a 50% duty cycle for the transmitter preburst. A '11111...' or a '10101...' sequence in Manchester or ...
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Figure 11-6. Timing Diagram for Failed Bit-check (Condition CV_Lim < Lim_min) (Lim_min = 14, Lim_max = 24) RX_ACTIVE Bit check Demod_Out Bit-check counter 0 T Startup_Sig_Proc Start-up mode Figure 11-7. Timing Diagram for Failed Bit-check (Condition: CV_Lim (Lim_min = 14, ...
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Receiving Mode If the Bit-check was successful for all bits specified by N receiving mode. To activate a connected microcontroller, the bits VSOUT_EN and CLK_ON in control register 3 are set interrupt is issued at pin ...
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If 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 ...
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Figure 11-10. Bit Error (TMODE = 0) Demod_Out Receiving mode Table 11-2. Mode RX 11.1.8 Recommended Lim_min and Lim_max for Maximum Sensitivity The sensitivity measurement in the section “Low-IF Receiver” in 5-4 on page 11 These values are optimized for ...
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TX Operation The transceiver is set to TX operation by using the bits OPM0 and OPM1 in the control register 1. Table 11-4. Before activating TX mode, the TX parameters (bit rate, modulation scheme ... ) must be selected ...
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Figure 11-11. TX Operation (T_MODE = 0) Command: Delete_IRQ N Pin IRQ = Write Control Register 1 OPM1, OPM0: Set IDLE ATA5811/ATA5812 60 Write Control Register 6 Baud1, BAUD0: Select baud rate range Lim_max0 to Lim_max5: Don't ...
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Figure 11-12. TX Transparent Mode (T_MODE = 1) Write Control Register 4 XLim: ASK/_NFSK: Sleep0 to Sleep4: XSleep: Write Control Register 3 FR7, FR8: VSOUT_EN: CLK_ON: Write Control Register 2 FR0 to FR6: P_mode: Write Control Register 1 IR1, IR0: ...
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Table 11-5. TX Modulation Schemes Mode ASK/_NFSK 11.3 Interrupts Via pin IRQ, the transceiver signals different operating conditions to a connected microcontrol- ler specific operating condition occurs, pin IRQ is set to high level. If ...
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Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristics: General (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 T = 25° 433.92 MHz (1-battery application) unless otherwise specified. Details about current consumption, timing and digital ...
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Electrical Characteristic: 1-Battery Application (Continued) All parameters refer to GND and are valid for 25°C. Application according to amb No. Parameters Test Conditions 1-battery application V VAUX open I VSOUT (no voltage regulator Power supply output ...
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Electrical Characteristic: 1-Battery Application (Continued) All parameters refer to GND and are valid for 25°C. Application according to amb No. Parameters Test Conditions Current in I 9.14 RX polling mode on P pin VS1 and VS2 ...
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Electrical Characteristics: 2-Battery Application All parameters refer to GND and are valid for T Application according to Figure 4-1 on page No. Parameters Test Conditions 10 2-Battery Application Supported voltage 10.1 2-battery application range 2 battery application V VAUX ...
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Electrical Characteristics: 2-Battery Application (Continued) All parameters refer to GND and are valid for T Application according to Figure 4-1 on page No. Parameters Test Conditions Supply current CLK enabled 10.11 RX mode V Current during 10.12 I VSOUT ...
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Electrical Characteristics: Car Application All parameters refer to GND and are valid for T Application according to Figure 3-1 on page No. Parameters Test Conditions 11 Car Application Supported voltage 11.1 Car application range Car application V I VSOUT ...
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Electrical Characteristics: Car Application (Continued) All parameters refer to GND and are valid for T Application according to Figure 3-1 on page No. Parameters Test Conditions Current during 11. pin VS2 I Startup_PLL VSOUT and VAUX Current ...
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Digital Timing Characteristics All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 otherwise specified. No. Parameters Test Conditions 12 Basic Clock Cycle of the Digital Circuitry 12.1 Basic clock cycle XLIM = ...
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Digital Timing Characteristics (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 otherwise specified. No. Parameters Test Conditions BR_Range = BR_Range0 13.5 Bit-rate range BR_Range1 BR_Range2 BR_Range3 XLIM = 0 BR_Range_0 ...
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Digital Timing Characteristics (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 otherwise specified. No. Parameters Test Conditions Time period SCK low to 15.10 CS low Time period CS low to ...
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Digital Timing Characteristics (Continued) All parameters refer to GND and are valid for T 6.6V (2-battery application) and V VS2 otherwise specified. No. Parameters Test Conditions PWR_ON high to positive edge on pin Every mode except 16.2 IRQ (see ...
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Digital Port Characteristics All parameter refer to GND and valid for T 6.6V (2 Battery Application) and V VS2 otherwise specified No. Parameters Test Conditions 17 Digital Ports CS input V VSINT -Low level input voltage 17.1 -High level ...
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Digital Port Characteristics (Continued) All parameter refer to GND and valid for T 6.6V (2 Battery Application) and V VS2 otherwise specified No. Parameters Test Conditions PWR_H input -Low level input voltage -Input current low 17.9 -High level input ...
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Ordering Information Extended Type Number ATA5811-PLQW ATA5812-PLQW 21. Package Information Package: QFN Exposed pad 5.1 x 5.1 Dimensions in mm Not indicated tolerances ± 0. Drawing-No.: 6.543-5089.02-4 Issue: 1; 14.01.03 4689F–RKE–08/06 ...
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Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4689F-RKE-08/06 4689E-RKE-06/06 4689D-RKE-09/05 ATA5811/ATA5812 90 History Quality of drawings improved Put datasheet in ...
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Table of Contents Features ..................................................................................................... 1 Applications .............................................................................................. 2 Benefits...................................................................................................... 2 1 General Description ................................................................................. 2 2 Typical Key Fob or Sensor Application with 1 Battery ......................... 6 3 Typical Car or Sensor Base-station Application ................................... 7 4 Typical ...
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Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 ...