AD8313 Datasheet PDF – Logarithmic Detector / Controller

Part Number: AD8313

Function: 0.1 GHz-2.5 GHz, 70 dB Logarithmic Detector/Controller

Package: 8-Lead MSOP Type

Manufacturer: Analog Devices


AD8313 datasheet



This is a logarithmic amplifier (log amp) integrated circuit (IC) designed and manufactured by Analog Devices. It’s commonly used in RF (Radio Frequency) and microwave applications to provide accurate measurements of power levels over a wide dynamic range.

The AD8313 is a complete multistage demodulating logarithmic amplifier that can accurately convert an RF signal at its input to an equivalent decibel-scaled value at its dc output. The AD8313 maintains a high degree of log conformance for signal frequencies from 0.1 GHz to 2.5 GHz.

Application is straightforward, requiring only a single supply of 2.7 V to 5.5 V and the addition of a suitable input and supply decoupling. Operating on a 3 V supply, its 13.7 mA consumption (for TA = 25°C) is only 41 mW. A power-down feature is provided; the input is taken high to
initiate a low current (20


1. Wide bandwidth: 0.1 GHz to2.5 GHz min

2. High dynamic range: 70 dB to±3.0 dB

3. High accuracy: ±1.0 dB over 65dB range (@ 1.9 GHz)

4. Fast response: 40 ns full-scale typical

5. Controller mode with error output

6. Scaling stable over supply and temperature

7. Wide supply range: 2.7 V to5.5 V

8. Low power: 40 mW at3 V

9. Power-down feature: 60mW at 3 V

10. Complete andeasy to use


1. RF transmitter power amplifier setpointcontrol and level monitoring
2. Logarithmic amplifier for RSSI measurement cellular base stations, radio link, radar

Other data sheets are available within the file:


AD8313 Datasheet PDF Download

AD8313 pdf