THS1031IDW Equivalent & Substitute Parts

Part Overview

The THS1031IDW is a 10-bit pipelined analog-to-digital converter manufactured by Texas Instruments, designed for single-channel data acquisition applications. It features a 30 MHz sampling rate and supports both differential and single-ended inputs with external or internal reference configurations. The device is packaged in a 28-SOIC surface-mount package and operates across a 3V to 5.5V supply range.

The THS1031IDW is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance or redesigns requiring active components with comparable functionality.

Substiute Parts

THS1031IDW

Texas InstrumentsIn Stock: 1471THS1031IDW Datasheet

Current PartRFQ

ADS825E

Texas InstrumentsIn Stock: 1933ADS825E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS1031IDW is evaluated based on the following critical parameters that determine functional and physical compatibility:

Core Functional Parameters:

• Resolution (10 bits) — must match exactly
• Architecture (Pipelined) — must match exactly
• Number of Inputs (1) — must match exactly
• Input Type (Differential, Single Ended) — must match exactly
• Data Interface (Parallel) — must match exactly
• Operating Temperature Range (-40°C ~ 85°C) — must match or exceed

Supply Voltage Parameters:

• Analog and Digital Supply Voltage ranges must be compatible with the application circuit

Physical Parameters:

• Package type and mounting method must be compatible with PCB design

Compliance Parameters:

• RoHS and REACH compliance status must meet regulatory requirements

The ADS825E qualifies as a substitute based on matching core functional parameters, identical operating temperature range, and equivalent compliance certifications. Package differences (28-SSOP vs. 28-SOIC) require PCB layout verification but do not affect electrical functionality.

Parameter Comparison

Engineering Selection Recommendations

ADS825E as Primary Substitute:

The ADS825E is the manufacturer-recommended substitute for the THS1031IDW. Both devices are manufactured by Texas Instruments and maintain identical core specifications: 10-bit resolution, pipelined architecture, single-channel input, parallel data interface, and -40°C to 85°C operating temperature range.

The ADS825E offers performance advantages with a 40 MHz sampling rate compared to the THS1031IDW's 30 MHz, providing additional headroom for signal acquisition. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Critical Design Considerations:

Supply voltage compatibility requires verification. The THS1031IDW operates across a 3V to 5.5V range, while the ADS825E requires a fixed 5V supply. Applications using 3V or 3.3V supplies must implement voltage regulation or alternative solutions.

Package transition from 28-SOIC to 28-SSOP requires PCB layout modification. The 28-SSOP package is narrower (5.30mm vs. 7.50mm width), necessitating footprint redesign and re-qualification of the PCB assembly process.

The ADS825E carries MSL rating 2 (1 Year), compared to the THS1031IDW's MSL rating 1 (Unlimited). Storage and handling procedures must comply with stricter moisture sensitivity requirements.

Frequently Asked Questions (FAQ)

Q: Can the ADS825E directly replace the THS1031IDW without PCB modifications?

A: Electrical functionality is compatible, but physical replacement requires PCB footprint redesign. The 28-SSOP package has different pin spacing and body dimensions than the 28-SOIC package. Pin-to-pin compatibility must be verified against the respective datasheets before implementation.

Q: What are the supply voltage implications of substitution?

A: The THS1031IDW accepts 3V to 5.5V on both analog and digital supplies. The ADS825E requires fixed 5V supplies. Applications operating at 3V or 3.3V must implement dedicated 5V regulation for the ADS825E or select an alternative device compatible with lower supply voltages.

Q: Are there performance differences between these devices?

A: The ADS825E provides a higher sampling rate (40 MHz vs. 30 MHz), which exceeds the THS1031IDW specification. Resolution, input configuration, and data interface remain identical. The increased sampling rate does not negatively impact compatibility and may improve performance in bandwidth-limited applications.

Q: What moisture handling precautions apply to the ADS825E?

A: The ADS825E carries MSL rating 2 (1 Year), requiring storage at controlled humidity levels and limiting shelf life to one year from the manufacturing date. The THS1031IDW carries MSL rating 1 (Unlimited), allowing indefinite storage. Procurement and inventory management procedures must account for this difference.

Q: Are both devices compliant with current regulatory standards?

A: Yes. Both the THS1031IDW and ADS825E are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations applicable to electronic components.

Q: What is the recommended approach for design transition?

A: Verify 5V supply availability in the target application. Confirm PCB layout compatibility with the 28-SSOP footprint. Review the ADS825E datasheet for any configuration or timing differences. Conduct functional testing with the substitute device before full production implementation.