TDA5220 Datasheet, PDF (7/44 Pages) Infineon Technologies AG – ASK/FSK Single Conversion Receiver

confidential
TDA 5220
preliminary
Product Description
2.1 Overview
The IC is a very low power consumption single chip FSK/ASK Superheterodyne
Receiver (SHR) for the frequency bands 810 to 870 MHz and 400 to 440 MHz.
The IC offers a high level of integration and needs only a few external compo-
nents. The device contains a low noise amplifier (LNA), a double balanced
mixer, a fully integrated VCO, a PLL synthesiser, a crystal oscillator, a limiter
with RSSI generator, a PLL FSK demodulator, a data filter, a data comparator
(slicer) and a peak detector. Additionally there is a power down feature to save
battery life.
2.2 Application
s Keyless Entry Systems
s Remote Control Systems
s Alarm Systems
s Low Bitrate Communication Systems
2.3 Features
s Low supply current (at 868MHz I_s = 5.9 mA typ. FSK mode, 5.2mA typ. ASK
mode)
s Supply voltage range 5V ±10%
s Power down mode with very low supply current (50nA typ)
s FSK and ASK demodulation capability
s Fully integrated VCO and PLL Synthesiser
s RF input sensitivity ASK < –107dBm
s RF input sensitivity FSK < –100dBm
s Selectable frequency ranges 810-870 MHz and 400-440 MHz
s Selectable reference frequency
s Limiter with RSSI generation, operating at 10.7MHz
s 2nd order low pass data filter with external capacitors
s Data slicer with self-adjusting threshold
Wireless Components
2-2
Target Specification, October 2001