AD7111BQ Equivalent & Substitute Parts

Part Overview

The AD7111BQ is a 17-bit Digital to Analog Converter (DAC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring high-resolution current output. The device features a single D/A converter with R-2R architecture, unbuffered current output, and parallel data interface. The AD7111BQ is classified as an obsolete product, necessitating identification of functionally compatible alternatives for ongoing system support and new designs requiring equivalent performance characteristics.

Substiute Parts

AD7111BQ

Analog Devices Inc.In Stock: 1181AD7111BQ Datasheet

Current PartRFQ

ADA4610-1ARZ

Analog Devices Inc.In Stock: 1378ADA4610-1ARZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution analysis for the AD7111BQ is constrained by the fundamental architectural and functional differences between the main part and available alternatives. The AD7111BQ is a dedicated 17-bit DAC with parallel data interface and unbuffered current output, designed specifically for data acquisition systems.

The identified substitute, ADA4610-1ARZ, is a J-FET operational amplifier with rail-to-rail output characteristics. This part operates in a fundamentally different functional category (linear amplifier versus data converter) and does not provide equivalent DAC functionality. Substitution between these parts is not viable for direct replacement in applications requiring 17-bit digital-to-analog conversion.

Substitution logic is based on the following critical parameters:

• Resolution (17-bit DAC functionality)
• Output type (current output versus voltage amplification)
• Data interface (parallel digital input)
• Architecture (R-2R DAC topology)

Parameter Comparison

Engineering Selection Recommendations

The AD7111BQ is an obsolete product with active inventory availability. For applications currently using the AD7111BQ, direct functional replacement requires identification of alternative 17-bit DAC solutions from Analog Devices Inc. or equivalent manufacturers offering parallel-interface, current-output DAC architectures.

The ADA4610-1ARZ, while manufactured by the same supplier, does not provide equivalent functionality and cannot serve as a direct substitute. This part is classified as active product status with ROHS3 compliance and extended operating temperature range (-40°C ~ 125°C), but these characteristics do not address the functional gap created by the absence of DAC conversion capability.

For new designs or system redesigns, evaluation of active-status DAC alternatives with comparable resolution, output type, and data interface specifications is required. Compliance certifications (RoHS, REACH, ECCN) should be verified against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the ADA4610-1ARZ directly replace the AD7111BQ in existing designs?

A: No. The ADA4610-1ARZ is an operational amplifier, not a digital-to-analog converter. It does not provide the 17-bit DAC functionality, parallel data interface, or current output characteristics of the AD7111BQ. Direct substitution is not possible.

Q: Why is the AD7111BQ classified as obsolete?

A: The AD7111BQ is listed as an obsolete product by Analog Devices Inc., indicating it has been discontinued from active manufacturing. Current inventory may be available through authorized distributors, but long-term supply cannot be guaranteed.

Q: What are the critical parameters for finding a true substitute for the AD7111BQ?

A: A functional equivalent must provide: 17-bit resolution, single D/A converter, current output (unbuffered), parallel data interface, R-2R architecture, 5V analog and digital supply compatibility, and operating temperature range of -40°C to 85°C or broader.

Q: Does the ADA4610-1ARZ meet the supply voltage requirements of the AD7111BQ?

A: No. The AD7111BQ requires 5V analog and digital supplies. The ADA4610-1ARZ operates with a supply span of 9V to 30V, which is incompatible with the 5V requirement of the original part.

Q: What is the significance of the package difference between these parts?

A: The AD7111BQ uses 16-CDIP through-hole packaging, while the ADA4610-1ARZ uses 8-SOIC surface-mount packaging. This represents a fundamental difference in mounting technology and board integration approach, further confirming these parts serve different functional roles.