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 detectors.
The AD8312 is a complete low‑cost RF log detector covering 100 MHz to 2.7 GHz with a typical dynamic range of 45 dB. It provides a temperature‑stable linear‑in‑dB response, low power operation (12 mW at 2.7 V) and a voltage‑output that varies from about 0.02 V to 2.2 V depending on input level.
The device is supplied in a 6‑lead wafer‑level chip‑scale package (1.0 mm × 1.5 mm) and includes pins for supply, input, output, setpoint and filtering. Detailed specifications, pin functions, typical performance curves and an evaluation board layout are provided in the following sections.
| Frequency range | 100 MHz – 2.7 GHz |
|---|---|
| Input voltage range | 1.25 mV – 224 mV rms (‑45 dBm – 0 dBm) |
| Dynamic range | 45 dB |
| Quiescent current | 42 mA |
| Output voltage (high‑power) | 0.85 V at –10 dBm input |
| Slope | 21.0 mV/dB |
| Operating temperature range | ‑40 °C to +85 °C |
| Package | 6‑lead wafer‑level chip scale, 1.0 mm × 1.5 mm |
It operates from 100 MHz up to 2.7 GHz.
The detector provides a typical dynamic range of 45 dB.
The device is supplied in a 6‑lead wafer‑level chip‑scale package measuring 1.0 mm × 1.5 mm.