AD7021

www.DataSheet4U.com Preliminary Technical Data FEATURES Low power, low IF transceiver Frequency bands 80 MHz to 650 MHz 862 MHz to 940 MHz Modulation schemes 2FSK, 3FSK, 4FSK Spectral shaping Gaussian and raised-cosine filtering Data rates supported 0.05 kbps to 25 kbps 2.3 V to 3.6 V power supply Programmable output power −16 dBm to +13 dBm in 63 steps Automatic PA ramp control Receiver sensitivity −125 dBm at 1 kbps, 2 FSK On-chip VCO and fractional-N PLL High Performance Narrowband ISM Transceiver IC ADF7021 On-chip 7-bit ADC and temperature sensor Fully automatic frequency control loop (AFC) Digital RSSI Integrated Tx/Rx switch Leakage current <1 μA in power-down mode APPLICATIONS Narrow-band standards ETSI EN 300-220, FCC Part 90, FCC Part 15, FCC Part 95, ARIB STD-T67 Low cost, wireless data transfer Remote control/security systems Wireless metering Private mobile radio Wireless medical telemetry service (WMTS) Keyless entry Home automation Process and building control Pagers FUNCTIONAL BLOCK DIAGRAM RSET TEMP SENSOR CE CREG(1:4) MUXOUT MUX 7-BIT ADC RLNA POLARIZATION LDO(1:4) TEST MUX LNA RFIN RFINB GAIN IF FILTER RSSI/ OFFSET CORRECTION 2FSK 3FSK 4FSK DEMODULATOR CLOCK AND DATA RECOVERY DATA CLK | TxDATA Tx/Rx CONTROL DATA I/O | RxDATA SWD AGC CONTROL SERIAL PORT SLE SDATA SREAD SCLK PA RAMP AFC CONTROL RFOUT DIVIDERS/ MUXING DIV P N/N + 1 Σ-Δ MODULATOR 2FSK 3FSK 4FSK MOD CONTROL GAUSSIAN/ RAISED COSINE FILTER VCO MUX CP PFD DIV R RING OSC C...