Is there a pin-compatible replacement for THS4631DR?

No pin-compatible replacements were identified in this review. All candidates with a similar function were dual-channel op-amps, which have a different pinout than the single-channel THS4631DR.

What risks should I check before replacing THS4631DR?

Key risks include pinout incompatibility (single vs. dual op-amp), and severe performance loss in bandwidth (GBW) and slew rate. Also, verify the supply voltage range and input characteristics.

THS4631DR Alternatives, Datasheet & Cross Reference | Texas Instruments

THS4631DR is a high-performance FET-input op-amp from Texas Instruments, featuring a 210 MHz bandwidth and 1000 V/µs slew rate. Finding a direct replacement requires careful matching of these high-speed characteristics.

AI replacement insight

Electrical riskhigh

Massive drop in bandwidth and slew rate.

Package riskhigh

Pinout is incompatible (single vs. dual op-amp).

Can it be replaced directly?

No direct, pin-compatible replacements were found. All alternatives require significant performance trade-offs and board redesign.

Best replacement path

Search for other single-channel, high-speed, high-voltage FET-input op-amps in an SOIC-8 package and verify the pinout.

Main risk

The primary risk is significant performance degradation, as the target is a specialized high-speed part and alternatives are much slower.

Recommended alternatives

A dual-channel op-amp with a compatible voltage range but much lower speed. Requires redesign.

View details

Alternative comparison matrix

Feature / factor	THS4631DR	TPA1882-SR	LM2904A-SR	Compatibility / risk
Package	SOIC-8	SOIC-8	SOIC-8	SOIC-8 — Package matches, but pinout does not.; LM2904A-SR: Package matches, but pinout does not.
Pinout	Single-channel	Dual-channel	Dual-channel	Dual-channel — Incompatible pinout; target is a single-channel op-amp.; LM2904A-SR: Incompatible pinout; target is a single-channel op-amp.
Voltage	30V (±15V)	40V	36V	40V / 36V — Candidate has higher max supply voltage.; LM2904A-SR: Candidate has higher max supply voltage.
Gbw	210 MHz	12 MHz	0.9 MHz	12 MHz / 0.9 MHz — Significantly lower bandwidth.; LM2904A-SR: Drastically lower bandwidth (general purpose vs high speed).
Slew Rate	1000 V/µs	12 V/µs	0.5 V/µs	12 V/µs / 0.5 V/µs — Significantly lower slew rate.; LM2904A-SR: Drastically lower slew rate.

Application & sourcing insights

Questions & answers

No direct drop-in alternative was found. TPA1882-SR is a functional alternative with a compatible voltage range but requires a redesign due to different pinout and much lower speed.