TSH31ID Equivalent & Substitute Parts

Part Overview

The TSH31ID is a general-purpose operational amplifier manufactured by STMicroelectronics in an 8-SOIC surface mount package. This device is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity. The TSH31ID delivers a gain-bandwidth product of 280 MHz with a slew rate of 300 V/µs, suitable for general-purpose amplification applications requiring moderate bandwidth and speed characteristics.

Substiute Parts

TSH31ID

STMicroelectronicsIn Stock: 1982TSH31ID Datasheet

Current PartRFQ

AD8055ARZ

Analog Devices Inc.In Stock: 2348AD8055ARZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TSH31ID is determined by compatibility across the following critical parameters:

Package and Mounting Compatibility: Both the main part and substitute must use the 8-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width) to ensure direct PCB footprint compatibility without layout modifications.

Electrical Operating Range: The substitute must operate within the specified temperature range of -40°C to 125°C and support the supply voltage span requirements. The TSH31ID operates from 6 V to 12 V; substitute parts must accommodate this range or a compatible subset.

Functional Classification: The substitute must be classified as a single-circuit operational amplifier suitable for general-purpose or voltage feedback amplification applications.

Regulatory and Compliance Status: All substitute parts must maintain ROHS3 compliance, REACH unaffected status, and equivalent moisture sensitivity levels to ensure manufacturing and environmental compliance consistency.

Input and Output Characteristics: Substitutes must provide compatible input bias current, input offset voltage, and output current capabilities within the application's tolerance requirements.

The AD8055ARZ meets these substitution criteria as an active, ROHS3-compliant alternative with identical package specifications and overlapping electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The TSH31ID is classified as obsolete, making the AD8055ARZ an appropriate substitute due to its active product status with ongoing manufacturer support and availability.

Compliance Alignment: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory consistency in manufacturing and supply chain operations.

Package Compatibility: Direct substitution is supported through identical 8-SOIC package specifications, eliminating the need for PCB layout modifications or footprint redesign.

Electrical Performance: The AD8055ARZ provides enhanced performance characteristics, including higher slew rate (1400 V/µs versus 300 V/µs) and comparable bandwidth specifications. The substitute operates at a minimum supply voltage of 8 V, which is within the TSH31ID's 6 V to 12 V range for applications using 8 V or higher supply voltages.

Supply Current Efficiency: The AD8055ARZ demonstrates lower supply current consumption (5.4 mA versus 20 mA), providing power efficiency benefits in battery-powered or thermally constrained applications.

Input Bias Current Difference: The AD8055ARZ exhibits higher input bias current (400 nA versus 2 pA). Applications with high-impedance input sources or precision transimpedance configurations require evaluation of this parameter against circuit design tolerances.

Frequently Asked Questions (FAQ)

Q: Can the AD8055ARZ directly replace the TSH31ID without circuit modifications?

A: Direct pin-compatible substitution is supported due to identical 8-SOIC package specifications. However, applications operating at supply voltages below 8 V require circuit redesign, as the AD8055ARZ minimum supply voltage is 8 V compared to the TSH31ID's 6 V minimum. Input bias current differences (400 nA versus 2 pA) may require transimpedance network adjustments in precision applications.

Q: What are the key electrical differences between these components?

A: The AD8055ARZ provides superior slew rate performance (1400 V/µs versus 300 V/µs) and lower supply current consumption (5.4 mA versus 20 mA). Both devices maintain identical input offset voltage (3 mV) and operating temperature range (-40°C to 125°C). Output current capability is comparable (60 mA versus 70 mA).

Q: Are both components suitable for the same application categories?

A: Both components are single-circuit operational amplifiers in 8-SOIC packages with ROHS3 compliance. The TSH31ID is classified as general-purpose, while the AD8055ARZ is specified as voltage feedback. Application suitability depends on circuit topology requirements and the specific performance characteristics needed.

Q: What supply voltage range must be considered for substitution?

A: The TSH31ID operates from 6 V to 12 V. The AD8055ARZ operates from 8 V to 12 V. Substitution is valid only for applications using supply voltages of 8 V or higher. Applications requiring 6 V or 7 V operation cannot use the AD8055ARZ as a direct substitute.

Q: How do the input bias current specifications affect circuit design?

A: The TSH31ID specifies 2 pA input bias current, while the AD8055ARZ specifies 400 nA. This 200-fold difference is significant in high-impedance transimpedance amplifier configurations, precision integrators, and applications with source impedances exceeding 1 MΩ. Low-impedance signal sources are generally unaffected by this parameter difference.

Q: Are there any compliance or regulatory differences between these components?

A: Both components maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity levels (MSL 1 - Unlimited). No compliance or regulatory barriers exist for substitution from an environmental or regulatory perspective.