AD8306ARZ

Overview

The AD8306ARZ is a fully calibrated limiting-logarithmic amplifier from Analog Devices, designed for IF and RF power measurement applications. It provides a 100 dB dynamic range with a stable RSSI scaling of 20 mV/dB slope and a –95 dBm intercept. The device features a programmable limiter output with an overall gain of 90 dB and a bandwidth up to 400 MHz. It operates on a single supply voltage ranging from +2.7 V to +6.5 V, consuming a typical quiescent current of 16 mA. The component utilizes a 16-lead narrow body SO package.

Feature Summary

• Provides accurate logarithmic decibel measurement of input signals over a wide dynamic range.
• Features a fully differential input interface with high impedance characteristics.
• Includes a programmable limiter output stage with adjustable drive current capabilities.
• Offers CMOS-compatible chip enable functionality for low-power standby modes.

Applications

• Receiver signal strength indication (RSSI)
• Very wide range IF and RF power measurement
• Receivers for frequency and phase modulation
• Low cost radar and sonar signal processing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging options such as tape and reel or tube quantities. Confirm that the industrial temperature range specifications align with your operational environment requirements before finalizing procurement decisions.

Selection Notes

Select this component when a complete, self-calibrated logarithmic amplifier solution is required without external calibration components. Consider the 100 dB dynamic range and 400 MHz bandwidth limits relative to your signal frequencies. Ensure the single-supply voltage range matches your system architecture and evaluate the need for the integrated limiter function versus using only the RSSI output.

Part Context

This part belongs to the AD8306 series of limiting-logarithmic amplifiers manufactured by Analog Devices. It is fabricated using an advanced complementary bipolar process with silicon-on-insulator isolation techniques. The device integrates ten detectors spaced at 12 dB intervals to achieve its extended dynamic range and linear log response.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

FAQ

How is the limiter output current programmed?

The limiter output current is determined by the resistor connected between the LMDR pin and ground, utilizing a nominal bias voltage of approximately 400 mV across this resistor.

What is the typical response time of the RSSI output?

The RSSI response time is nominally 73 ns for a 10% to 90% transition, though this can be increased by adding an external capacitor to the FLTR pin.