AD7111ACRZ-REEL

Overview

The AD7111ACRZ-REEL is a monolithic logarithmic digital-to-analog converter (DAC) from Analog Devices, packaged in a 16-pin SOIC. It attenuates analog input signals over a dynamic range of 0 dB to 88.5 dB with a resolution of 0.375 dB. The device utilizes an onboard 8-bit buffer and decode logic to drive a 17-bit R-2R ladder. Operating on a single +5 V supply, it features current output and parallel data interface. The AC grade ensures operation within the industrial temperature range of –40°C to +85°C.

Feature Summary

• Logarithmic attenuation from 0 dB to 88.5 dB in 0.375 dB steps
• On-chip 17-bit latch and decode logic for direct 8-bit MPU interfacing
• +5 V single-supply operation with low power consumption
• Industrial temperature range: –40°C to +85°C

Applications

• Audio Attenuators
• Sonar Systems
• Function Generators
• Digitally Controlled AGC System

Procurement Notes

Verify that the suffix 'REEL' indicates tape-and-reel packaging rather than tube packaging. Confirm the 'AC' grade corresponds to the specified –40°C to +85°C operating range. Ensure the order quantity matches the reel specifications provided by the distributor.

Selection Notes

Select this model for applications requiring precise logarithmic signal control without external decoding logic. The AC grade is suitable for industrial environments. Compare against the AD7111A series if pin compatibility with the industry-standard AD7524 is required, noting the AD7111A uses level-triggered WR inputs unlike the edge-triggered AD7111.

Part Context

This component belongs to the LOGDAC family of multiplying D/A converters. It is designed to replace standard linear DACs where wide dynamic range and fine step resolution are critical. The part number indicates the AC temperature grade and R package type.

Replacement Considerations

The AD7111A is pin-compatible with the AD7524. For upgrades requiring transparent latch operation via level-triggered WR, consider the AD7111A variant.