ATA2745 Datasheet | Atmel

Features - Very High Transmitting Frequency Accuracy pared to SAW Solutions - - - - - - - (Enables Receivers at Lower Bandwidth than With SAW Resonators) Lower Cost than the Usual Discrete Solutions Using SAW and Transistors Supply Voltage 2.2V to 4.0V in the Temperature Range of - 40°C to 85°C XTO Output for Clocking the Microcontroller, Thereby, Together with the ATAR090 or ATAR890, Resulting in the Optimum System Cost-effectiveness One-chip Solution With Minimum External Circuitry Single-ended Open-collector Output (Same Antennas Can Be Used as in Discrete Solutions, Simpler Matching of Magnetic Loop Antennas) ESD Protection According to MIL-STD 883 (4 KV HBM) Except Pins XTO1, XTO2, ANT and LF Very Small SSO16 Package, Pitch 0.635, 150 mil UHF ASK Transmitter ATA2745 1. Description The ATA2745 is a PLL transmitter IC which has been developed especially for the demands of RF low-cost data transmission systems at data rates up to 20 k Baud. The transmitting frequency range is 310 MHz to 440 MHz. It can be used in ASK systems. The main applications of the ATA2745 are in the areas of outside temperature metering, socket control, garage door openers, consumption metering, light/fan or airconditioning controls, jalousies, wireless keyboards, and various other consumer market applications. .. 4898B- RKE- 08/06 Figure 1-1. System Block Diagram UHF ASK Remote control transmitter UHF ASK Remote control receiver Microcontroller 4898B- RKE- 08/06 1 Li cell Encoder ATARx9x XTO PLL ATA3745 Demod. Control 1...3 Keys IF Amp Antenna Antenna VCO PLL XTO Power amp. Figure 1-2. Block Diagram PWRSET Power up VCC...