DAC7643VFBR Equivalent & Substitute Parts

Part Overview

The DAC7643VFBR is a 16-bit digital-to-analog converter manufactured by Texas Instruments, designed for data acquisition applications requiring dual voltage-output conversion. This component features a 32-LQFP surface mount package and operates with external voltage references and ±5V analog supply.

The DAC7643VFBR is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this legacy device is specified.

Substiute Parts

DAC7643VFBR

Texas InstrumentsIn Stock: 900DAC7643VFBR Datasheet

Current PartRFQ

DAC7642VFBT

Texas InstrumentsIn Stock: 1568DAC7642VFBT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DAC7643VFBR is determined by strict equivalence across the following critical parameters:

• Resolution and Converter Count: 16-bit resolution with 2 D/A converters
• Output Configuration: Voltage-buffered output with external reference
• Supply Voltages: ±5V analog and 5V digital supply requirements
• Electrical Performance: Settling time of 10µs, INL/DNL specifications of ±2 and ±1 LSB
• Interface and Architecture: Parallel data interface with R-2R architecture
• Package Specification: 32-LQFP (7x7) surface mount package
• Operating Temperature: -40°C to 85°C range
• Compliance: ROHS3 compliance and MSL Level 1

The DAC7642VFBT meets all these parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The DAC7642VFBT is a direct parametric equivalent to the DAC7643VFBR across all critical electrical and mechanical specifications. The primary distinction is product status: the DAC7643VFBR is obsolete while the DAC7642VFBT is active, making the latter the preferred choice for new designs and ongoing production.

Both parts maintain identical compliance certifications including ROHS3 compliance and REACH unaffected status. The packaging difference—bulk versus Tape & Reel—reflects standard distribution practices and does not affect functional compatibility or performance characteristics.

For applications currently specified with the DAC7643VFBR, the DAC7642VFBT provides full functional replacement with the added benefit of active product status and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the DAC7642VFBT directly replace the DAC7643VFBR in existing designs?

A: Yes. The DAC7642VFBT is a parametric equivalent with identical electrical performance, pin configuration, package dimensions, and operating specifications. No circuit modifications are required.

Q: What is the significance of the product status difference?

A: The DAC7643VFBR is classified as obsolete, indicating Texas Instruments no longer manufactures or supports this part. The DAC7642VFBT is active, ensuring continued availability, technical support, and compliance with current manufacturing standards.

Q: Are there packaging considerations when switching from DAC7643VFBR to DAC7642VFBT?

A: The DAC7643VFBR is supplied in bulk packaging while the DAC7642VFBT is supplied in Tape & Reel format. Both use identical 32-LQFP (7x7) surface mount packages. Tape & Reel packaging is standard for automated assembly processes and does not affect component functionality or performance.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the DAC7643VFBR and DAC7642VFBT are ROHS3 compliant, REACH unaffected, and carry identical MSL Level 1 ratings. Compliance certifications are equivalent.

Q: What are the key parameters that define substitution eligibility?

A: Substitution is based on matching resolution (16-bit), converter count (2), output type (voltage-buffered), supply voltages (±5V analog, 5V digital), settling time (10µs), data interface (parallel), reference type (external), INL/DNL specifications (±2, ±1 LSB), architecture (R-2R), operating temperature range (-40°C to 85°C), and package specification (32-LQFP 7x7).