AD8307AR-REEL7

Overview

The AD8307AR-REEL7 is a low-cost, DC to 500 MHz logarithmic amplifier manufactured by Analog Devices Inc. It provides a dynamic range of 92 dB with a typical slope of 25 mV/dB and an intercept of -84 dBm. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, drawing a typical current of 7.5 mA. It features a fully differential DC-coupled signal path and includes a CMOS-compatible enable pin that reduces standby current to 150 μA. The component is housed in an 8-lead SOIC package.

Feature Summary

• Complete multistage demodulating logarithmic amplifier based on progressive compression technique
• Fully differential DC-coupled signal path ensuring high stability over temperature
• CMOS-compatible chip enable interface for rapid power-down to low standby current
• Highly stable scaling characteristics across the industrial operating temperature range

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 REEL7 suffix against the manufacturer's ordering guide to confirm tape-and-reel packaging specifications. Ensure compatibility with the required industrial temperature range (-40°C to +85°C) and validate that the 8-lead SOIC footprint matches the target PCB design. Cross-reference the datasheet revision F specifications for any updates to absolute maximum ratings or electrical characteristics prior to final procurement.

Selection Notes

Select this component when a wide dynamic range up to 92 dB is required at frequencies up to 500 MHz. It is suitable for applications needing a simple single-supply solution with minimal external components. Consider the 25 mV/dB slope for direct interfacing with ADCs. Evaluate the 100 ns power-up time and 150 μA sleep current if power management is critical for the system architecture.

Part Context

The AD8307 series represents a family of monolithic demodulating logarithmic amplifiers designed for RF and IF signal processing. The AD8307 variant specifically utilizes six amplifier stages to achieve its performance metrics. It serves as a foundational component for analog signal measurement systems where precise logarithmic conversion of input signals is necessary without complex digital post-processing.

Replacement Considerations

The AD8310 offers a buffered output and faster response time. The ADL5513 supports operation up to 4 GHz but consumes more power. The AD8309 provides a higher input range with a limiter output.