AD7937BRZ Equivalent & Substitute Parts

Part Overview

The AD7937BRZ is a 12-bit digital-to-analog converter manufactured by Analog Devices Inc., featuring dual D/A converters in a 24-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The AD7937BRZ operates with 5V analog and digital supply voltages, delivers current-unbuffered output, and employs an R-2R architecture with 1µs settling time.

Substiute Parts

AD7937BRZ

Analog Devices Inc.In Stock: 1119AD7937BRZ Datasheet

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AD7948BRZ

Analog Devices Inc.In Stock: 3508AD7948BRZ Datasheet

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DAC7801KU

Burr BrownIn Stock: 2329DAC7801KU Datasheet

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DAC7801KU/1K

Burr BrownIn Stock: 1029DAC7801KU/1K Datasheet

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DAC7801LU

Texas InstrumentsIn Stock: 4159DAC7801LU Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7937BRZ is determined by the following critical parameters: 12-bit resolution, dual D/A converter configuration, 5V supply compatibility, parallel data interface, external reference requirement, current-unbuffered output, R-2R or equivalent architecture, and 24-SOIC package format. All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional compatibility within the original application circuit.

The AD7948BRZ differs in converter count (single vs. dual) and settling time characteristics, requiring circuit-level evaluation. The DAC7801 series (Burr Brown and Texas Instruments variants) maintains dual-converter architecture and identical package format, with architecture variations (Multiplying DAC vs. R-2R) and settling time differences that may affect performance in time-critical applications.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the AD7937BRZ in active production designs, DAC7801LU (Texas Instruments) is the preferred substitute. This part maintains identical electrical specifications (12-bit, dual converter, 24-SOIC package, 5V supply), achieves superior settling time (800ns vs. 1µs), and carries active product status with ROHS3 compliance certification.

DAC7801KU (Burr Brown) provides equivalent functionality with active product status and identical package format. The Multiplying DAC architecture differs from the original R-2R design; applications requiring specific architecture characteristics must evaluate this distinction.

AD7948BRZ is not recommended as a direct substitute due to single D/A converter configuration versus the dual-converter requirement of the original design. This part is suitable only for applications requiring single-channel conversion.

DAC7801KU/1K carries obsolete product status matching the original part, limiting its utility for new procurement. This variant is applicable only when existing inventory must be maintained for legacy system support.

Frequently Asked Questions (FAQ)

Q: Can AD7948BRZ replace AD7937BRZ in all applications?

A: No. AD7948BRZ contains a single D/A converter versus the dual-converter configuration of AD7937BRZ. Substitution is possible only in applications requiring single-channel conversion. Dual-channel designs require parts with two integrated converters.

Q: What is the primary difference between DAC7801 variants from different manufacturers?

A: DAC7801LU (Texas Instruments) and DAC7801KU (Burr Brown) employ different internal architectures: R-2R versus Multiplying DAC. Both maintain 12-bit resolution, dual converters, and 24-SOIC packaging. Architecture selection depends on application requirements for linearity, settling time, and reference voltage handling.

Q: Is the 24-SOIC package identical across all substitute parts?

A: Yes. All recommended substitutes except AD7948BRZ use 24-SOIC packaging with 0.295" width and 7.50mm height, ensuring mechanical compatibility. AD7948BRZ uses 20-SOIC packaging and requires PCB layout modification.

Q: Which substitute part has the fastest settling time?

A: DAC7801KU, DAC7801KU/1K, and DAC7801LU all achieve 800ns settling time, compared to 1µs for the original AD7937BRZ. AD7948BRZ has significantly slower settling time at 600µs typical.

Q: Are all substitute parts RoHS compliant?

A: AD7948BRZ and DAC7801LU carry ROHS3 compliance certification. DAC7801KU product status does not specify RoHS compliance. DAC7801KU/1K is marked as not applicable. Compliance verification is required for regulated applications.

Q: What is the impact of INL/DNL differences between parts?

A: AD7948BRZ offers superior INL/DNL specifications (±0.5 LSB for both parameters) compared to AD7937BRZ (±0.5 INL, ±1 DNL). DAC7801 variants show ±1 LSB for both parameters. Applications with strict linearity requirements should evaluate these differences against system accuracy specifications.