DAC8581IPWG4 Equivalent & Substitute Parts

Part Overview

The DAC8581IPWG4 is a 16-bit digital-to-analog converter manufactured by Texas Instruments, designed for data acquisition applications requiring voltage output conversion. This device features a single D/A converter with buffered voltage output, SPI data interface, and external reference capability. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives for ongoing system support and new procurement requirements.

Substiute Parts

DAC8581IPWG4

Texas InstrumentsIn Stock: 701DAC8581IPWG4 Datasheet

Current PartRFQ

DAC8581IPW

Texas InstrumentsIn Stock: 65835DAC8581IPW Datasheet

MFR RecommendedRFQ

DAC8811ICDGKT

Texas InstrumentsIn Stock: 1261DAC8811ICDGKT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DAC8581IPWG4 is determined by the following critical parameters: resolution (16-bit), output type (voltage-buffered), data interface (SPI), reference type (external), and package compatibility (16-TSSOP surface mount). The substitute parts identified maintain these core functional requirements while differing in specific electrical characteristics and product lifecycle status.

DAC8581IPW qualifies as a direct functional equivalent, sharing identical bit resolution, output configuration, data interface, and package type. The primary distinction is packaging format (tube versus tape/reel) and product status classification.

DAC8811ICDGKT represents a functional alternative with different architectural and electrical characteristics. While maintaining 16-bit resolution and SPI interface, this part differs in output type (current-unbuffered versus voltage-buffered), supply voltage ranges, settling time, and package configuration (8-VSSOP versus 16-TSSOP). This substitution requires circuit redesign considerations.

Parameter Comparison

Engineering Selection Recommendations

DAC8581IPW is the preferred substitute for direct replacement applications. This part maintains identical functional specifications, electrical characteristics, and package footprint as the DAC8581IPWG4. The product status is classified as "Not For New Designs," indicating mature technology with established supply chains. Both parts carry ROHS3 compliance and identical moisture sensitivity ratings, ensuring compatibility with existing manufacturing and storage protocols.

DAC8811ICDGKT is suitable only for applications where circuit topology can accommodate current-output architecture. This part is classified as "Active" product status, providing long-term availability assurance. However, the transition from voltage-buffered to current-unbuffered output, combined with different supply voltage requirements (2.7V minimum versus 1.8V minimum) and reduced INL/DNL specifications (±1 LSB versus ±0.25 LSB), requires comprehensive circuit redesign and performance validation. The 8-VSSOP package also necessitates PCB layout modifications.

Frequently Asked Questions (FAQ)

Q: Can DAC8581IPW be used as a direct drop-in replacement for DAC8581IPWG4?

A: Yes. Both parts share identical 16-bit resolution, voltage-buffered output, SPI interface, external reference configuration, and 16-TSSOP package footprint. The primary difference is packaging format (tube versus cut tape/reel). Pin-for-pin compatibility and electrical specifications are equivalent.

Q: What are the key differences between DAC8581IPWG4 and DAC8811ICDGKT?

A: The DAC8811ICDGKT differs in four critical areas: output type (current-unbuffered versus voltage-buffered), supply voltage range (2.7V ~ 5.5V versus ±5V analog and 1.8V ~ 5.5V digital), settling time (500ns versus 1µs), and linearity specifications (±1 LSB INL/DNL versus ±0.25 LSB). The package is also different (8-VSSOP versus 16-TSSOP). These differences require circuit redesign.

Q: Is the DAC8811ICDGKT suitable for applications requiring buffered voltage output?

A: No. The DAC8811ICDGKT provides current-unbuffered output, requiring external output buffering circuitry for voltage conversion. Applications designed for direct voltage output from the DAC8581IPWG4 cannot use this part without significant circuit modifications.

Q: What is the impact of different package types on PCB design?

A: DAC8581IPWG4 and DAC8581IPW both use 16-TSSOP packages with identical footprints, allowing direct PCB reuse. DAC8811ICDGKT uses 8-VSSOP package, requiring new PCB layout and routing. Pin assignments differ between these package types.

Q: Are all three parts RoHS compliant?

A: Yes. DAC8581IPWG4, DAC8581IPW, and DAC8811ICDGKT are all ROHS3 compliant. However, moisture sensitivity levels differ: DAC8581IPWG4 and DAC8581IPW have MSL 1 (unlimited), while DAC8811ICDGKT has MSL 2 (1 year), requiring different storage and handling protocols.

Q: Which substitute part should be selected for new designs?

A: DAC8811ICDGKT is classified as "Active" product status, providing long-term design support. However, this selection requires circuit redesign due to output type and supply voltage differences. DAC8581IPW is classified as "Not For New Designs," limiting its suitability for new development despite functional equivalence.