High Performance Narrow-Band Transceiver IC Features: Low power, narrow-band transceiver Frequency bands using dual VCO 80 MHz to 650 MHz 842 MHz to 916 MHz Programmable IF filter bandwidths of 9 kHz, 13.5 kHz, and 18.5 kHz Modulation schemes: 2FSK, 3FSK, 4FSK, MSK Spectral shaping: Gaussian and raised cosine filtering Fully automatic frequency control loop (AFC) On-chip, 7-bit ADC and temperature sensor On-chip VCO and fractional-N PLL Data rates supported: 0.05 kbps to 24 kbps 2.3 V to 3.6 V power supply Programmable output power −16 dBm to +13 dBm in 63 steps Automatic power amplifier (PA) ramp control Receiver sensitivity −130 dBm at 100 bps, 2FSK −122 dBm at 1 kbps, 2FSK Patent pending, on-chip image rejection calibration Digital received signal strength indication (RSSI) Integrated Tx/Rx switch 0.1 μA leakage current in power-down mode

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