The AD8312 is a complete low cost subsystem for the measurement of RF signals in the frequency range of 100 MHz to 2.7 GHz, with a typical dynamic range of 45 dB, intended for use in a wide variety of cellular handsets and other wireless devices. It provides a wider dynamic range and better accuracy than possible using discrete diode detect.
The AD8312 is a complete low‑cost subsystem for measuring RF signals from 100 MHz to 2.7 GHz. It provides a 45 dB dynamic range, temperature‑stable linear‑in‑dB response, and rapid 70 ns response to a 10 dB step, making it suitable for cellular handsets, RSSI/TSSI measurement, and transmitter power monitoring.
The device is supplied in a 6‑lead wafer‑level chip‑scale package (1.0 mm × 1.5 mm) and operates from a 2.7 V to 5.5 V supply. Pin functions include VPOS (supply), VOUT (logarithmic output), VSET (setpoint), CFLT (filter), COMM (ground) and RFIN (RF input). An evaluation board and optional external components allow slope adjustment and response‑time tuning.
| Frequency range | 100 MHz – 2.7 GHz |
|---|---|
| Input voltage range | 1.25 mV – 224 mV rms |
| Quiescent current | 42 mA |
It has a rapid response of about 70 ns for a 10 dB step.
It is available in a 6‑lead wafer‑level chip‑scale package measuring 1.0 mm × 1.5 mm.