ADI ADF7021-VBCPZ-RL

The ADF7021-V is a high performance, low power, narrow-band RF transceiver based on the ADF7021-N. The architecture of the ADF7021-V transceiver is similar to that of the ADF7021-N except that an external VCO is used by the on-chip RF synthesizer for applications that require improved phase noise performance. The ADF7021-V is designed to operate in both the license-free ISM bands and in the licensed bands from 80 MHz to 960 MHz. To minimize RF feedthrough and spurious emissions, the external VCO operates at 2× or 4× the desired RF frequency; the ADF7021-V supports a maximum VCO frequency operation of 1920 MHz. The 4×VCO operation is programmable by enabling an additional on-chip divide-by-2 outside the RF synthesizer loop and offers improved phase noise performance. As with the ADF7021-N receiver, the IF filter bandwidths of 9 kHz, 13.5 kHz, and 18.5 kHz are supported, making the ADF7021-V ideally suited to worldwide narrow-band telemetry applications. The part has both Gaussian and raised cosine transmit data filtering options to improve spectral efficiency for narrow-band applications.

• High performance, low power, narrow-band transceiver
• Enhanced performance ADF7021-N with external VCO
• Frequency bands using external VCO: 80 MHz to 960 MHz
• Improved adjacent channel power (ACP) and adjacent channel rejection (ACR) compared with the ADF7021
• Programmable IF filter bandwidths: 9 kHz, 13.5 kHz, and 18.5 kHz
• Modulation schemes: 2FSK, 3FSK, 4FSK, MSK
• Spectral shaping: Gaussian and raised cosine filtering
• Data rates: 0.05 kbps to 24 kbps
• Power supply: 2.3 V to 3.6 V
• Programmable output power: −16 dBm to +13 dBm in 63 steps
• Automatic power amplifier (PA) ramp control
• Receiver sensitivity −125 dBm at 250 bps, 2FSK; −122 dBm at 1 kbps, 2FSK
• Patent pending, on-chip image rejection calibration
• On-chip fractional-N PLL
• On-chip, 7-bit ADC and temperature sensor
• Fully automatic frequency control (AFC) loop
• Digital received signal strength indication (RSSI)
• Integrated Tx/Rx switch
• Leakage current in power-down mode: 0.1 μA

• Narrow-band, short-range device (SRD) standards ETSI EN 300 220
• 500 mW output power capability in 869 MHz g3 subband with external PA
• High performance receiver rejection, blocking, and adjacent channel power (ACP)
• FCC Part 90 (meets Emission Mask D requirements)
• FCC Part 95
• ARIB STD-T67
• Wireless metering
• Narrow-band wireless telemetry