AD8307AR-REEL

Overview

The AD8307AR-REEL is a low-cost, DC to 500 MHz logarithmic amplifier/detector from Analog Devices. It provides a dynamic range of 92 dB with ±1 dB linearity up to 100 MHz and ±3 dB at higher frequencies. The device features a slope of 25 mV/dB and an intercept of -84 dBm. It operates on a single supply voltage ranging from 2.7 V to 5.5 V, drawing a typical current of 7.5 mA. The component includes a CMOS-compatible enable pin for standby operation.

Feature Summary

• Complete monolithic demodulating logarithmic amplifier based on progressive compression technique
• Fully differential DC-coupled signal path ensuring high stability over temperature
• CMOS-compatible control pin enables fast power-up and low standby current consumption
• 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 REEL suffix against the manufacturer's ordering guide to confirm packaging details. Ensure the industrial temperature rating (-40°C to +85°C) matches your system requirements. Cross-reference the datasheet revision F specifications with your design constraints. Confirm that the SOIC-8 package dimensions align with your PCB layout. Validate supply voltage compatibility within the 2.7 V to 5.5 V range.

Selection Notes

Select this component when a wide dynamic range and high-frequency response are required without complex external calibration. The integrated offset compensation loop simplifies circuit design compared to discrete solutions. Consider the 25 mV/dB slope for direct interfacing with ADCs or microcontrollers. Evaluate the 150 μA sleep current if power management during idle states is critical for the application.

Part Context

The AD8307 series represents a family of logarithmic amplifiers designed for RF and IF signal processing. This specific part utilizes an 8-lead SOIC package, offering a compact footprint for surface-mount applications. It serves as a foundational component for analog signal measurement systems requiring precise amplitude detection across broad frequency bands.

Replacement Considerations

The AD8310 offers buffered output and faster response time. The ADL5513 supports higher frequencies up to 4 GHz but consumes more power. The AD8309 provides a limiter output option. Verify pinout compatibility and electrical parameter overlaps before substituting.