The document introduces the features of the AD8310, a fast, voltage-out logarithmic amplifier from Analog Devices. It is a multistage demodulating logarithmic amplifier with voltage output and rise time less than 15 ns. It has a high current capacity, a dynamic range of 95 dB, and operates in the DC-440 MHz frequency range. The AD8310 is suitable for applications such as signal level conversion to decibel form, transmitter antenna power measurement, and receiver signal strength indication (RSSI).
The AD8310 is a fast voltage‑out logarithmic amplifier covering DC to 440 MHz with a 95 dB dynamic range and rise time under 15 ns. It operates from a single 2.7 V to 5.5 V supply and can source up to 25 mA into a grounded load.
The device is supplied in an 8‑lead MSOP package for an industrial temperature range of –40 °C to +85 °C and is suited for signal‑level conversion, antenna power measurement, RSSI, and other RF measurement applications.
| Supply Voltage (VPOS) | 2.7 V to 5.5 V |
|---|---|
| Quiescent Current (Zero‑signal) | 8 mA typical |
| Dynamic Range | 95 dB |
| Input Resistance (INHI‑INLO) | 800 Ω to 1200 Ω |
| Maximum Output Current | 25 mA into grounded load |
| Operating Temperature Range | –40 °C to +85 °C |
The AD8310 operates from a single supply of 2.7 V minimum up to 5.5 V.
The device provides a 95 dB dynamic range from the noise floor to maximum input.
It can source up to 25 mA into a grounded load.