AD8309ARU-REEL7

Overview

The AD8309ARU-REEL7 is a demodulating logarithmic amplifier with a limiter output, operating from 5 MHz to 500 MHz. It provides a 100 dB dynamic range (–78 dBm to +22 dBm) and a stable RSSI scaling of 20 mV/dB slope with a –95 dBm intercept. The device features fully differential inputs with 1 kΩ resistance and 2.5 pF capacitance. It operates on a single supply voltage ranging from +2.7 V to +6.5 V at a typical quiescent current of 16 mA. The unit is housed in a 16-lead TSSOP package.

Feature Summary

• Integrates a complete multistage log-limiting IF amplifier providing both accurate Received Signal Strength Indication (RSSI) and a programmable limiter output.
• Features a fully differential input stage presenting a moderately high impedance for direct signal interfacing.
• Utilizes an advanced complementary bipolar process with silicon-on-insulator isolation techniques for robust performance.

Applications

• Receivers for Frequency and Phase Modulation
• Very Wide Range IF and RF Power Measurement
• Receiver Signal Strength Indication (RSSI)
• Low Cost Radar and Sonar Signal Processing

Procurement Notes

Verify the specific ordering suffix REEL7 indicates a 7-inch tape and reel packaging configuration. Confirm that the component meets the required industrial temperature range specifications of –40 °C to +85 °C. Ensure compatibility with the 16-lead TSSOP footprint during PCB layout. Cross-reference the datasheet revision B specifications against current manufacturing data sheets to confirm parameter stability.

Selection Notes

Select this component when a combined limiting amplifier and logarithmic measurement function is required within the 5 MHz to 500 MHz frequency band. Consider the 100 dB dynamic range and 20 mV/dB slope for applications demanding precise signal strength monitoring. Evaluate the single-supply operation capability between 2.7 V and 6.5 V against system power constraints. Assess the need for differential inputs versus single-ended alternatives based on noise immunity requirements.

Part Context

This part belongs to the Analog Devices AD8309 series of demodulating logarithmic amplifiers. It is specifically designed as a complete IF limiting amplifier solution. The device combines high voltage gain with progressive compression to convert wide dynamic range signals into hard-limited outputs suitable for subsequent processing.

Replacement Considerations

Consult official documentation for verified substitute part numbers. No public confirmed substitutes are listed in the provided source material.