DAC712UB Equivalent & Substitute Parts

Part Overview

The DAC712UB is a 16-bit digital-to-analog converter manufactured by Texas Instruments, housed in a 28-SOIC package. This component features a single D/A converter with voltage-buffered output, internal reference, and parallel data interface. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts must maintain compatibility across critical electrical parameters including bit resolution, settling time, output type, and supply voltage ranges.

Substiute Parts

DAC712UB

Texas InstrumentsIn Stock: 1987DAC712UB Datasheet

Current PartRFQ

DAC8734SRHAR

Texas InstrumentsIn Stock: 2354DAC8734SRHAR Datasheet

MFR RecommendedRFQ

DAC8734SRHAT

Texas InstrumentsIn Stock: 2230DAC8734SRHAT Datasheet

MFR RecommendedRFQ

DAC715UB

Burr BrownIn Stock: 1258DAC715UB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DAC712UB is determined by the following critical parameters: 16-bit resolution, single D/A converter configuration, voltage-buffered output, and R-2R architecture. The DAC712UB operates with an internal reference and parallel data interface, which are core functional requirements.

Two substitution categories are identified:

Parametric Equivalent (DAC715UB): Maintains identical electrical specifications including 16-bit resolution, single converter, 10µs settling time, internal reference, parallel interface, identical supply voltage range (±11.4V ~ 16.5V), and matching INL/DNL performance (±4 LSB). Package and mounting type are identical (28-SOIC, surface mount). This part provides direct functional replacement with no design modifications required.

Manufacturer Recommended Substitutes (DAC8734SRHAR, DAC8734SRHAT): These parts share 16-bit resolution and R-2R architecture but differ in converter count (4 converters), data interface (SPI instead of parallel), reference type (external instead of internal), and package format (40-VQFN instead of 28-SOIC). These substitutes require design-level integration changes and are suitable only when system architecture can accommodate the enhanced feature set and different pinout.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The DAC715UB is the appropriate selection when pin-for-pin and functional compatibility is required. This parametric equivalent maintains all electrical specifications, package format, and interface characteristics of the DAC712UB. The part is currently active in production, ensuring long-term availability. Both parts are ROHS3 compliant and operate across the identical temperature and supply voltage ranges.

For Enhanced Performance Applications: The DAC8734SRHAR and DAC8734SRHAT are suitable only when system redesign is feasible. These parts offer improved INL/DNL performance (±1 LSB versus ±4 LSB), faster settling time (8µs typical versus 10µs), and extended operating temperature range (-40°C ~ 105°C). However, implementation requires accommodation of the 40-VQFN package, SPI serial interface, external reference requirement, and quad-converter architecture. These parts are active products with ROHS3 compliance and superior moisture sensitivity ratings (MSL 2).

Selection between DAC8734SRHAR and DAC8734SRHAT is determined by packaging requirements: both are functionally identical with identical electrical specifications and differ only in tape and reel packaging configuration.

Frequently Asked Questions (FAQ)

Q: Can the DAC715UB directly replace the DAC712UB without PCB modifications?

A: Yes. The DAC715UB is a parametric equivalent with identical pin count (28-SOIC), identical electrical specifications, and matching interface requirements. No PCB layout changes are necessary.

Q: What are the key differences between the DAC712UB and DAC8734SRHAR/SRHAT?

A: The primary differences are: (1) converter count—DAC8734 integrates four converters versus one in DAC712UB; (2) data interface—DAC8734 uses SPI serial interface versus parallel in DAC712UB; (3) reference—DAC8734 requires external reference versus internal in DAC712UB; (4) package—DAC8734 uses 40-VQFN versus 28-SOIC; (5) INL/DNL performance—DAC8734 achieves ±1 LSB versus ±4 LSB. These differences require design-level integration changes.

Q: Are all substitute parts RoHS compliant?

A: The DAC712UB, DAC8734SRHAR, and DAC8734SRHAT are ROHS3 compliant. RoHS status for the DAC715UB is not specified in available documentation.

Q: What is the moisture sensitivity difference between these parts?

A: The DAC712UB has MSL 3 (168 hours), while DAC8734SRHAR and DAC8734SRHAT have MSL 2 (1 year), indicating superior moisture resistance in the DAC8734 series. The DAC715UB MSL rating is not specified.

Q: Can I use the DAC8734 in a system designed for the DAC712UB?

A: Not without significant redesign. The DAC8734 requires a different PCB footprint (40-VQFN versus 28-SOIC), serial SPI communication protocol instead of parallel interface, external reference circuit design, and firmware modifications to support quad-converter architecture and SPI protocol.

Q: Which substitute offers the best long-term availability?

A: Both the DAC715UB and DAC8734 series are active products. The DAC8734SRHAR and DAC8734SRHAT are current Texas Instruments products with enhanced specifications and are recommended for new designs requiring extended product lifecycle support.