The AD8312 is a complete, low cost subsystem for the measurement of RF signals in the frequency range of 50 MHz to 3.5 GHz. It has a typical dynamic range of 45 dB and is 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. In particular, its temperature stable linear-in-dB response makes it suitable for temperature sensitive applications. The AD8312 has a fast response of 85/120 ns, making it well suited for high end data wireless applications such as RF basebands and transceivers.
The AD8312 RF detector provides a complete, low‑cost solution for measuring RF signals from 50 MHz to 3.5 GHz. It offers a typical dynamic range of 45 dB and operates over a wide temperature range (‑40 °C to +85 °C), making it suitable for cellular handsets, wireless terminals, and transmitter power measurement applications.
Key features include a rapid 85 ns rise / 120 ns fall time, low power draw (≈12 mW at 2.7 V), and a voltage‑output that varies logarithmically with input power. The device is supplied in a 6‑ball wafer‑level chip‑scale package and includes pin‑out, absolute maximum ratings, and typical performance curves.
| Frequency range | 0.05‑3.5 GHz |
|---|---|
| Input voltage range | 1.25‑224 mV rms |
| Dynamic range | 45 dB |
| Supply voltage | 3.0‑5.5 V |
| Quiescent current | 4.2 mA (typ) |
| Operating temperature range | ‑40 °C to +85 °C |
| Package | 6‑ball wafer‑level chip‑scale (WLCSP) |
The AD8312 operates from 50 MHz up to 3.5 GHz.
It can be powered from 2.7 V to 5.5 V, with a typical range of 3.0 V to 5.5 V.
The device provides a typical dynamic range of about 45 dB.
Typical quiescent current is 4.2 mA.