GENERAL DESCRIPTION
The ADF7021-N is a high performance, low power, narrow band transceiver based on the ADF7021. The ADF7021-N has IF filter bandwidths of 9 kHz, 13.5 kHz, and 18.5 kHz, making it ideally suited to worldwide narrowband standards and particularly those that stipulate 12.5 kHz channel separation.
It is designed to operate in the narrow-band, license-free ISM bands and in the licensed bands with frequency ranges of 80 MHz to 650 MHz and 842 MHz to 916 MHz. The part has both Gaussian and raised cosine transmit data filtering options to improve spectral efficiency for narrow-band applications. It is suitable for circuit applications targeted at the Japanese ARIB STD-T67, the European ETSI EN 300 220, the Korean short range device regulations, the Chinese short range device regulations, and the North American FCC Part 15, Part 90, and Part 95 regulatory standards. A complete transceiver can be built using a small number of external discrete components, making the ADF7021-N very suitable for price-sensitive and area-sensitive applications.

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
  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
  On-chip VCO and fractional-N PLL
  On-chip, 7-bit ADC and temperature sensor
  Fully automatic frequency control loop (AFC)
  Digital received signal strength indication (RSSI)
  Integrated Tx/Rx switch
  0.1 μA leakage current in power-down mode
 
APPLICATIONS
  Narrow-band, short range device (SRD) standards
     ARIB STD-T67, ETSI EN 300 220, Korean SRD standard,
        FCC Part 15, FCC Part 90, FCC Part 95
  Low cost, wireless data transfer
  Remote control/security systems
  Wireless metering
  Wireless medical telemetry service (WMTS)
  Home automation
  Process and building control
  Pagers