AD8307ANZ

Overview

The AD8307ANZ is a low-cost, monolithic demodulating logarithmic amplifier manufactured by Analog Devices Inc. It operates from DC to 500 MHz with a dynamic range of 92 dB and a typical supply current of 7.5 mA at 2.7 V minimum. The device features a fully differential dc-coupled signal path, a logarithmic slope of 25 mV/dB, and an intercept of −84 dBm. It provides ±1 dB linearity up to 100 MHz and includes a CMOS-compatible enable pin for standby operation.

Feature Summary

• Complete multistage logarithmic amplifier based on progressive compression technique
• Fully differential dc-coupled signal path ensuring high stability over temperature
• Fast-acting CMOS-compatible control pin for rapid power-down to standby mode

Applications

• Receiver signal strength indication (RSSI)
• Transmitter antenna power measurement
• Conversion of signal level to decibel form

Procurement Notes

Verify the specific package type required for your design, as the AD8307 series includes both surface-mount SOIC and through-hole PDIP variants. Confirm that the industrial temperature rating of -40°C to +85°C meets your operational environment requirements before finalizing procurement.

Selection Notes

Select the AD8307ANZ when a through-hole PDIP-8 package is necessary for prototyping or specific board layouts. Ensure the application frequency remains within the specified 500 MHz limit and that the input signal levels fall within the 92 dB dynamic range to maintain the specified logarithmic accuracy.

Part Context

The AD8307ANZ belongs to the AD8307 family of logarithmic amplifiers. While the standard AD8307ARZ utilizes an SOIC package, the ANZ variant specifically denotes the 8-lead PDIP construction. Both share identical electrical characteristics and functional block diagrams, differing only in physical mounting style.

Replacement Considerations

The AD8310 serves as a next-generation upgrade offering buffered output and faster response time.