AD7111ACR-REEL

Overview

The AD7111ACR-REEL is a monolithic multiplying D/A converter from the LOGDAC family, fabricated in LC2MOS technology. It provides an attenuation range of 0 dB to 88.5 dB with a nominal resolution of 0.375 dB. The device accepts an 8-bit parallel input which is decoded into a 17-bit word for an R-2R ladder. It operates on a single +5 V supply and features on-chip data latches. The AD7111ACR-REEL variant is packaged in a 16-pin SOIC (R-16) and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• Dynamic Range: 88.5 dB attenuation capability
• Resolution: 0.375 dB steps via 17-bit internal DAC
• Interface: 8-bit parallel data port with CS and WR control
• Package: 16-pin SOIC (R-16)

Applications

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

Procurement Notes

Verify that the suffix REEL indicates tape-and-reel packaging rather than tube. Confirm the AC grade meets the required accuracy specifications for the target application. Check for ESD sensitivity handling requirements during assembly.

Selection Notes

Select this part for applications requiring wide dynamic range logarithmic attenuation. Ensure the output amplifier has low bias current (<10 nA) and offset voltage (<50 µV) to minimize DC errors. Consider using a feedback capacitor (10 pF to 30 pF) to compensate for phase lag.

Part Context

The AD7111/AD7111A series are logarithmic D/A converters designed for precise signal attenuation. The AD7111A version is pin-compatible with the industry-standard AD7524, allowing for easy upgrades to designs requiring wider dynamic range and finer step resolution.

Replacement Considerations

Public confirmed substitute part numbers only; omit otherwise.