ATAB5757 Atmel, ATAB5757 Datasheet
ATAB5757
Specifications of ATAB5757
Related parts for ATAB5757
ATAB5757 Summary of contents
Page 1
Features • PLL Transmitter IC with Single-ended Output • High Output Power (6 dBm) at 8.1 mA (315 MHz) and 8.5 mA (433 MHz) Typical Values • Divide by 24 (ATA5756) and 32 (ATA5757) Blocks for 13 MHz Crystal Frequencies ...
Page 2
Pin Configuration Figure 2-1. Pinning TSSOP10 Table 2-1. Pin Description Pin Symbol Function Clock output signal for the microcontroller. The clock output frequency is set by the crystal to f The CLK output stays Low in 1 CLK power-down ...
Page 3
Table 2-1. Pin Description (Continued) Pin Symbol Function 4 ANT2 Emitter of antenna output stage 5 ANT1 Open collector antenna output 6 XTO2 Diode switch, used for FSK modulation 7 XTO1 Connection for crystal 8 VS Supply voltage 9 GND ...
Page 4
Figure 2-2. 3. General Description This fully integrated PLL transmitter allows the design of simple, low-cost RF miniature transmit- ters for TPM and RKE applications. The VCO is locked to 24 × f ATA ATA ...
Page 5
The power amplifier is an open-collector output delivering a current pulse which is nearly inde- pendent from the load impedance and can therefore be controlled via the connected load impedance. This output configuration enables a simple matching to any kind ...
Page 6
Transmission with ENABLE = open 4.1.1 ASK Mode The ATA5756/ATA5757 is activated by ENABLE = open, FSK = High, ASK = Low. The microcon- troller is then switched to external clocking. After typically 0.6 ms, the CLK driver is ...
Page 7
Transmission with ENABLE = High 4.2.1 FSK Mode The ATA5756/ATA5757 is activated by ENABLE = High, FSK = High and ASK = Low. The micro- controller is then switched to external clocking. After typically 0.6 ms, the CLK driver ...
Page 8
Figure 4-4. 4.3 Accuracy of Frequency Deviation The accuracy of the frequency deviation using the XTAL pulling method is about ±20% if the fol- lowing tolerances are considered. One important aspect is that the values of C crystals are strongly ...
Page 9
... Clock Pulse Take-over by Microcontroller The clock of the crystal oscillator can be used for clocking the microcontroller. Atmel’s ATARx9x microcontroller family provides the special feature of starting with an integrated RC oscillator to switch on the ATA5756/ATA5757’s external clocking and to wait automatically until the CLK out- put of the ATA5756/ATA5757 is activated. After a time period of 250 µ ...
Page 10
The 0.66 pF output capacitance absorbed into the load impedance a real impedance of 684 Ω (ATA5756) at 315 MHz and 623 Ω (ATA5757) at 433.92 MHz should be measured with a net- work analyses at pin 5 (ANT1) with ...
Page 11
Application Circuits For the supply voltage blocking capacitor C 4-7 on page 12 the power amplifier. For C ance value and to enable it to realize Z Together with the pins of ATA5756 and the PCB board wires, C ...
Page 12
Figure 4-7. ASK Application Circuit Loop C1 Antenna L1 VS ATA5756/ATA5757 12 BPXY ATARx9x BPXY BPXY OSC1 7 ATA5756/ATA5757 Power up/down EN CLK 24/ ASK PFD FSK 3 CP ANT2 ...
Page 13
Figure 4-8. FSK Application Circuit Loop C1 Antenna L1 VS 4702J–RKE–09/08 BPXY ATARx9x BPXY BPXY OSC1 7 ATA5756/ATA5757 Power up/down EN CLK 24/ ASK PFD FSK 3 CP ANT2 4 ...
Page 14
Figure 4-9. ESD Protection Circuit VS CLK GND 5. Absolute Maximum Ratings Parameters Supply voltage Power dissipation Junction temperature Storage temperature Ambient temperature Ambient temperature in power-down mode for V 15 minutes without damage with S V < 0.25 V ...
Page 15
Electrical Characteristics -40°C to 125°C unless otherwise specified. S amb Typical values are given 3.0 V and fF 4.37 C ...
Page 16
Electrical Characteristics (Continued 2 3 -40°C to 125°C unless otherwise specified. S amb Typical values are given 3.0 V and fF 4.37 ...
Page 17
Electrical Characteristics (Continued 2 3 -40°C to 125°C unless otherwise specified. S amb Typical values are given 3.0 V and fF 4.37 ...
Page 18
Ordering Information Extended Type Number ATA5756-6DQY ATA5756-6DPY ATA5757-6DQY ATA5757-6DPY 9. Package Information TSSOP10 Package: TSSOP 10 (acc. to JEDEC Standard MO-187) Dimensions in mm Not indicated tolerances ± 0.05 0.5 nom 0 nom. ATA5756/ATA5757 18 ...
Page 19
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. 4702J-RKE-07/08 4702I-RKE-11/05 4702H-RKE-09/04 4702G-RKE-08/04 4702F-RKE-08/04 4702E-RKE-07/04 4702J–RKE–09/08 ATA5756/ATA5757 History • Put datasheet in ...
Page 20
... Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ...