TDA5212

ASK / FSK 915MHz的单转换接收器 ASK/FSK 915MHz Single Conversion Receiver

The IC is a very low power consumption single chip FSK/ASK Superheterodyne Receiver SHR for receive frequencies between 902 and 928 MHz that is pin compatible to the ASK Receiver TDA5202. The IC offers a high level of integration and needs only a few external components. 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.

Features

■ Low supply current Is = 5.4 mA typ.FSK mode, 4.8 mA typ. ASK mode

■ Supply voltage range 5V ±10%

■ Power down mode with very low supply current 90nA typ.

■ FSK and ASK demodulation capability

■ Fully integrated VCO and PLL Synthesiser

■ RF input sensitivity ASK -112dBm typ. at 25°C, better than -109dBm over complete specified operating temperature range -40 to +85°C

■ RF input sensitivity FSK -105dBm typ. at 25°C, better than -102dBm over complete specified operating temperature range -40 to +85°C

■ Receive frequency range between 902 and 928 MHz

■ Selectable reference frequency

■ Limiter with RSSI generation, operating at 10.7MHz

■ 2nd order low pass data filter with external capacitors

■ Data slicer with self-adjusting threshold

Application

■ Keyless Entry Systems

■ Remote Control Systems

■ Low Bitrate ISM-band Communication Systems