OPA1632D Audio Amplifier Equivalent & Substitute Parts

Part Overview

The OPA1632D is a single-channel audio amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This component is classified as a differential output audio amplifier designed for audio signal processing applications. The OPA1632D is currently designated as Last Time Buy, indicating that Texas Instruments has discontinued or will discontinue production. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications utilizing this amplifier topology.

Substiute Parts

OPA1632D

Texas InstrumentsIn Stock: 1503OPA1632D Datasheet

Current PartRFQ

OPA1632DR

Texas InstrumentsIn Stock: 16515OPA1632DR Datasheet

MFR RecommendedRFQ

MC34071ADG

onsemiIn Stock: 932MC34071ADG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPA1632D is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Amplifier Type: Audio
• Number of Circuits: 1
• Output Type: Differential
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Slew Rate: 50 V/µs (minimum)
• -3dB Bandwidth: 180 MHz (minimum)
• Current - Output / Channel: 85 mA (minimum)
• Voltage - Supply Span: 5 V to 32 V (minimum range)
• Operating Temperature: -40°C to 85°C (minimum range)

Substitute Parts Identified:

OPA1632DR (Texas Instruments): This part is a direct equivalent manufactured by the same supplier. It maintains identical electrical specifications and package configuration. The primary distinction is packaging format: OPA1632DR is supplied in Cut Tape (CT) and Digi-Reel® format, whereas OPA1632D is supplied in Tube format. OPA1632DR carries Active product status, ensuring continued availability and support.

MC34071ADG (onsemi): This part does not meet the primary substitution criteria. While it shares the 8-SOIC package and surface mount configuration, it is classified as a General Purpose Amplifier with Single-Ended output topology, not a Differential Audio Amplifier. Additionally, its electrical specifications deviate significantly: Slew Rate of 13 V/µs (below requirement), Gain Bandwidth Product of 4.5 MHz (below requirement), and Current - Output / Channel of 30 mA (below requirement). The MC34071ADG is designated Obsolete and does not qualify as a functional substitute.

Parameter Comparison

Engineering Selection Recommendations

OPA1632DR is the qualified substitute for OPA1632D. Both parts are manufactured by Texas Instruments and share identical electrical and functional specifications. The OPA1632DR maintains Active product status, ensuring long-term availability, technical support, and supply chain continuity. The only distinction is packaging format: OPA1632DR is supplied in Cut Tape (CT) and Digi-Reel® format instead of Tube format. This packaging difference does not affect electrical performance or pin configuration. Both parts are ROHS3 Compliant and carry identical compliance certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.33.0001).

MC34071ADG does not qualify as a substitute. This part fails multiple critical substitution criteria: it is classified as a General Purpose Amplifier rather than an Audio Amplifier, features Single-Ended output instead of Differential output, and exhibits significantly reduced electrical performance (Slew Rate 13 V/µs vs. 50 V/µs, Current - Output / Channel 30 mA vs. 85 mA). Additionally, MC34071ADG is designated Obsolete, making it unsuitable for new designs or long-term supply assurance.

For applications currently using OPA1632D in Tube packaging, transition to OPA1632DR in Cut Tape or Digi-Reel® format is recommended to maintain design continuity while securing active product status and improved inventory availability.

Frequently Asked Questions (FAQ)

Q: Can OPA1632DR be used as a direct replacement for OPA1632D?

A: Yes. OPA1632DR is a direct electrical and functional equivalent. Both parts are manufactured by Texas Instruments with identical specifications for amplifier type, output topology, slew rate, bandwidth, supply voltage range, and operating temperature. The only difference is packaging format (Cut Tape / Digi-Reel® versus Tube). Pin configuration and electrical performance are identical.

Q: What is the difference between OPA1632D and OPA1632DR packaging?

A: OPA1632D is supplied in Tube packaging, while OPA1632DR is supplied in Cut Tape (CT) and Digi-Reel® format. Both contain the same integrated circuit in an 8-SOIC package. The packaging format affects handling, storage, and automated assembly processes but does not alter electrical characteristics or pin assignments.

Q: Why is MC34071ADG not a suitable substitute?

A: MC34071ADG fails multiple critical criteria. It is a General Purpose Amplifier with Single-Ended output, not an Audio Amplifier with Differential output. Its electrical performance is significantly lower: Slew Rate of 13 V/µs (versus 50 V/µs required), Current - Output / Channel of 30 mA (versus 85 mA required), and Gain Bandwidth Product of 4.5 MHz (versus 180 MHz -3dB Bandwidth required). Additionally, MC34071ADG is Obsolete, making it unavailable for new designs.

Q: Are OPA1632D and OPA1632DR pin-compatible?

A: Yes. Both parts use the 8-SOIC package with identical pin assignments. No PCB layout modifications are required when substituting OPA1632DR for OPA1632D.

Q: What is the inventory status of OPA1632DR compared to OPA1632D?

A: OPA1632D (Last Time Buy) has 1,418 pieces in stock. OPA1632DR (Active status) has 16,447 pieces in stock, providing significantly greater availability and supply chain security.

Q: Do OPA1632D and OPA1632DR have the same compliance certifications?

A: Yes. Both parts are ROHS3 Compliant, REACH Unaffected, and carry identical ECCN (EAR99) and HTSUS (8542.33.0001) classifications. Moisture Sensitivity Level is 1 (Unlimited) for both parts.

Q: Can I mix OPA1632D and OPA1632DR in the same production batch?

A: Yes. Since both parts are electrically and functionally identical with the same pin configuration, they can be used interchangeably in the same circuit design and PCB layout. However, for consistency and traceability, it is recommended to standardize on OPA1632DR for new production runs.