DAC8581IPWR Equivalent & Substitute Parts

Part Overview

The DAC8581IPWR 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 external reference capability and SPI data interface, operating across a wide temperature range of -40°C to 85°C.

The DAC8581IPWR carries a "Not For New Designs" product status, indicating that Texas Instruments has discontinued active development and support for this component. This status necessitates identifying functionally equivalent alternatives for new applications or when inventory becomes unavailable.

Substiute Parts

DAC8581IPWR

Texas InstrumentsIn Stock: 1338DAC8581IPWR Datasheet

Current PartRFQ

DAC8811ICDGKR

Texas InstrumentsIn Stock: 1245DAC8811ICDGKR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DAC8581IPWR is determined by the following critical parameters:

• Resolution: 16-bit conversion capability
• Output Configuration: Voltage output with buffered architecture
• Interface Protocol: SPI serial communication
• Reference Architecture: External reference requirement
• Temperature Range: -40°C to 85°C operating window
• Package Compatibility: Surface mount form factor
• Regulatory Compliance: ROHS3 compliance

The DAC8811ICDGKR is identified as the manufacturer-recommended substitute. While this part maintains 16-bit resolution and SPI interface compatibility, it introduces architectural differences in output type and supply voltage specifications that must be evaluated for circuit-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

The DAC8811ICDGKR is the manufacturer-recommended substitute for the DAC8581IPWR. Both devices maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for new designs.

The DAC8811ICDGKR carries an "Active" product status, ensuring continued manufacturer support and availability. This status provides long-term supply chain stability compared to the discontinued DAC8581IPWR.

Key differences requiring circuit evaluation:

• Output architecture changes from voltage-buffered to current-unbuffered, necessitating output stage redesign
• Package transitions from 16-TSSOP to 8-VSSOP, reducing pin count and board footprint
• Supply voltage specifications narrow from ±5V analog to 2.7V ~ 5.5V, affecting power distribution design
• Settling time improves from 1µs to 500ns, enabling faster conversion cycles
• Linearity specifications differ (DNL ±0.25 LSB vs ±1 LSB), impacting precision requirements

Frequently Asked Questions (FAQ)

Q: Can the DAC8811ICDGKR directly replace the DAC8581IPWR without circuit modifications?

A: No. The output type differs fundamentally—DAC8581IPWR provides buffered voltage output while DAC8811ICDGKR provides unbuffered current output. The application circuit must be redesigned to accommodate current-to-voltage conversion. Additionally, package pinout differs between 16-TSSOP and 8-VSSOP configurations.

Q: What are the supply voltage compatibility considerations?

A: The DAC8581IPWR requires ±5V analog supply and 1.8V ~ 5.5V digital supply. The DAC8811ICDGKR operates on 2.7V ~ 5.5V for both analog and digital supplies. Systems using ±5V analog supplies must be redesigned for single-supply operation.

Q: How do the settling time specifications affect application performance?

A: The DAC8811ICDGKR settles in 500ns versus the DAC8581IPWR's 1µs. This faster settling enables higher conversion rates but does not prevent substitution in applications with slower timing requirements.

Q: Are there package footprint compatibility issues?

A: Yes. The DAC8581IPWR uses 16-TSSOP packaging while the DAC8811ICDGKR uses 8-VSSOP packaging. PCB layout and component placement must be redesigned. The 8-VSSOP package occupies less board area.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the DAC8581IPWR and DAC8811ICDGKR are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements for industrial and commercial applications.