THS1031CDW Equivalent & Substitute Parts

Part Overview

The THS1031CDW is a 10-bit pipelined analog-to-digital converter manufactured by Texas Instruments, designed for single-channel data acquisition applications. It features a 1 MHz sampling rate and operates across a 3V to 5.5V supply range in a 28-SOIC surface mount package. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, redesigns, and production continuity.

Substiute Parts

THS1031CDW

Texas InstrumentsIn Stock: 1433THS1031CDW Datasheet

Current PartRFQ

ADS825E

Texas InstrumentsIn Stock: 1933ADS825E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS1031CDW is determined by the following critical parameters:

• Resolution: 10-bit conversion capability
• Sampling Rate: Minimum 30 MHz performance
• Input Configuration: Single-channel with differential and single-ended input support
• Architecture: Pipelined ADC topology
• Data Interface: Parallel output
• Supply Voltage Compatibility: Operational range overlap with 3V to 5.5V
• Package Type: Surface mount configuration
• Compliance: ROHS3 compliance and REACH unaffected status

The ADS825E qualifies as a manufacturer-recommended substitute based on matching resolution, input configuration, architecture, and data interface specifications. While the ADS825E operates at a higher sampling rate (40M vs. 30M) and requires fixed 5V supply, these represent performance enhancements and do not preclude substitution in applications designed for the THS1031CDW.

Parameter Comparison

Engineering Selection Recommendations

The ADS825E is the manufacturer-recommended substitute for the THS1031CDW. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and production continuity.

The primary design consideration is package transition from 28-SOIC to 28-SSOP. While both are 28-pin surface mount packages, the SSOP variant features a narrower body width (5.30mm vs. 7.50mm), requiring PCB layout verification to confirm footprint compatibility.

Supply voltage requirements differ: the THS1031CDW accepts 3V to 5.5V operation, while the ADS825E operates at fixed 5V. Applications currently operating the THS1031CDW at 3V or 3.3V require power supply modification to support the ADS825E. The ADS825E's extended operating temperature range (-40°C to 85°C) and higher sampling rate (40M vs. 30M) provide performance advantages for applications requiring broader environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can the ADS825E directly replace the THS1031CDW without PCB modifications?

A: Package footprint differences require PCB layout verification. The 28-SSOP package is narrower than the 28-SOIC, necessitating confirmation that the existing footprint accommodates the substitute device. Pin-to-pin compatibility exists, but physical placement constraints must be evaluated.

Q: What are the supply voltage implications of substitution?

A: The THS1031CDW operates across 3V to 5.5V, while the ADS825E requires fixed 5V operation. Systems currently powered at 3V or 3.3V must be modified to provide 5V to the ADS825E. Existing 5V designs require no power supply changes.

Q: Are there performance differences between these devices?

A: Both devices provide 10-bit resolution with pipelined architecture and parallel data interface. The ADS825E operates at 40M sampling rate compared to the THS1031CDW's 30M rate, representing a performance enhancement. The ADS825E also supports an extended operating temperature range (-40°C to 85°C vs. 0°C to 70°C).

Q: Does substitution affect regulatory compliance?

A: Both devices maintain ROHS3 compliance and REACH unaffected status. No regulatory re-qualification is required for the substitution from a compliance perspective.

Q: What is the moisture sensitivity level difference?

A: The THS1031CDW carries MSL 1 (unlimited), while the ADS825E carries MSL 2 (1 year). The ADS825E requires stricter moisture control during storage and handling, with a one-year shelf life limit under specified humidity conditions.