AD8307AR

Overview

The AD8307AR 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 ±1 dB linearity up to 100 MHz. The device features a slope of 25 mV/dB and an intercept of −84 dBm. Powered by a single supply of 2.7 V to 5.5 V at 7.5 mA typical current, it includes a CMOS-compatible enable pin for standby mode. Packaged in an 8-lead SOIC_N, it supports industrial temperatures from −40°C to +85°C.

Feature Summary

• Complete multistage logarithmic amplifier based on progressive compression technique
• Fully differential dc-coupled signal path with high stability over temperature
• Fast acting CMOS-compatible control pin for disable functionality
• Requires no significant external components for basic operation

Applications

• Conversion of signal level to decibel form
• Transmitter antenna power measurement
• Receiver signal strength indication (RSSI)
• Low cost radar and sonar signal processing
• Network and spectrum analyzers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature grade. Confirm RoHS compliance status as indicated in the latest datasheet revision. Ensure the supplier provides valid traceability for Analog Devices Inc. products. Check for any recent product change notices that may affect specifications or availability.

Selection Notes

Select this component when a wide dynamic range logarithmic response is required up to 500 MHz. The AD8307AR is suitable for applications needing precise amplitude measurement without complex external calibration. Consider the 92 dB dynamic range and ±1 dB linearity for high-fidelity signal monitoring. Evaluate the single-supply requirement and low power consumption for battery-operated systems.

Part Context

The AD8307 series represents a family of demodulating logarithmic amplifiers designed for RF and IF signal processing. The AD8307AR specifically denotes the industrial temperature grade variant housed in an 8-lead SOIC package. This part is engineered for cost-sensitive applications requiring robust performance across varying environmental conditions.

Replacement Considerations

The AD8310 offers buffered output and faster response time. The ADL5513 provides operation up to 4 GHz with lower input range. The AD8309 features a higher input range and limiter output. Verify interface compatibility and pinout differences before substitution.