TS971ID Equivalent & Substitute Parts

Part Overview

The TS971ID is a general purpose operational amplifier manufactured by STMicroelectronics, housed in an 8-SOIC surface mount package. This rail-to-rail amplifier is designed for linear signal processing applications requiring low power consumption and compact form factor. The TS971ID is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design support and procurement continuity. Substitute parts must maintain functional compatibility across critical electrical parameters including supply voltage range, output type, and thermal operating specifications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	4	V/µs
Gain Bandwidth Product	12	MHz
Current - Input Bias	200	nA
Voltage - Input Offset	1	mV
Current - Supply	2	mA
Current - Output / Channel	100	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	10	V
Operating Temperature	-40 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TS971ID are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Mechanical Compatibility: All substitute parts must use the 8-SOIC surface mount package with identical 0.154" (3.90mm) width to ensure PCB layout compatibility without redesign.

Electrical Compatibility: Substitute parts must maintain rail-to-rail output type and operate within the supply voltage range of 2.7V to 10V minimum. Input offset voltage and input bias current specifications must not exceed the original part's ratings to preserve circuit performance.

Functional Compatibility: Single-circuit general purpose amplifier topology is required. Gain bandwidth product and slew rate characteristics determine signal fidelity in the application; substitutes with equal or superior performance are acceptable.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and MSL Level 1 rating to ensure manufacturing process compatibility and long-term reliability.

Substitute parts are grouped into two categories: direct functional equivalents (TL971ID, TL971IDR, TL971QDRQ1) and performance-enhanced alternatives (AD8031ARZ-REEL). Direct equivalents maintain identical electrical specifications, while performance-enhanced alternatives provide superior bandwidth and slew rate characteristics with compatible supply voltage and package specifications.

Parameter Comparison

Parameter	TS971ID	TL971ID	TL971IDR	TL971QDRQ1	AD8031ARZ-REEL
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc.
Product Status	Obsolete	Last Time Buy	Active	Active	Active
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	Voltage Feedback
Number of Circuits	1	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	4	5	5	5	35
Gain Bandwidth Product (MHz)	12	12	12	12	80
Current - Input Bias (nA)	200	200	200	200	450
Voltage - Input Offset (mV)	1	1	1	1	1
Current - Supply (mA)	2	2	2	2	0.9
Current - Output / Channel (mA)	100	80	80	80	15
Voltage - Supply Span (Min) (V)	2.7	2.7	2.7	2.7	2.7
Voltage - Supply Span (Max) (V)	10	12	12	12	12
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 85
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Functional Equivalents (TL971ID, TL971IDR, TL971QDRQ1)

The Texas Instruments TL971 series parts provide direct electrical equivalence to the TS971ID with identical gain bandwidth product (12 MHz) and input bias current (200 nA) specifications. These parts maintain the same general purpose amplifier topology and are pin-compatible within the 8-SOIC package.

TL971IDR is the recommended primary substitute, offering active product status with highest inventory availability (9,894 units). This part is supplied in Cut Tape and Digi-Reel packaging, suitable for both manual and automated assembly processes.

TL971ID is available as a Last Time Buy option with 2,180 units in stock, supplied in tube packaging. This part maintains full electrical compatibility but represents a declining product lifecycle.

TL971QDRQ1 is qualified to AEC-Q100 automotive standards with active product status. This variant is appropriate for applications requiring automotive-grade components and is supplied in Tape & Reel packaging.

Performance-Enhanced Alternative (AD8031ARZ-REEL)

The Analog Devices AD8031ARZ-REEL provides superior performance characteristics with 35V/µs slew rate and 80 MHz bandwidth compared to the TS971ID's 4V/µs and 12 MHz specifications. This part is suitable for applications requiring higher signal fidelity and faster transient response.

The AD8031ARZ-REEL operates within the compatible supply voltage range (2.7V to 12V) and maintains rail-to-rail output capability. However, the maximum operating temperature is limited to 85°C compared to the TS971ID's 125°C rating. This part is appropriate for applications with thermal operating requirements below 85°C.

Input bias current is elevated at 450 nA compared to 200 nA for the TS971ID, and output current per channel is reduced to 15 mA from 100 mA. These differences require circuit analysis to confirm compatibility with existing load impedance and biasing networks.

Product Status Considerations

The TS971ID is classified as obsolete. TL971IDR (active status) is the preferred substitute for new designs and ongoing procurement. For existing designs currently using TS971ID, TL971ID (Last Time Buy) provides a transition path with identical specifications.

Frequently Asked Questions (FAQ)

Q: Can TL971IDR be used as a direct replacement for TS971ID without circuit modification?

A: Yes. TL971IDR is electrically and mechanically compatible with TS971ID. Both parts share identical gain bandwidth product (12 MHz), slew rate (5V/µs), input bias current (200 nA), and supply voltage range (2.7V to 12V minimum). The 8-SOIC package pinout is identical, enabling direct PCB substitution without layout changes.

Q: What is the difference between TL971ID and TL971IDR?

A: TL971ID and TL971IDR are electrically identical general purpose amplifiers with the same electrical specifications. The primary difference is packaging: TL971ID is supplied in tube packaging, while TL971IDR is supplied in Cut Tape and Digi-Reel format. TL971IDR has active product status with higher inventory availability, making it the preferred choice for new procurement.

Q: Is AD8031ARZ-REEL a suitable substitute for TS971ID?

A: AD8031ARZ-REEL is mechanically compatible (8-SOIC package) and electrically compatible within the supply voltage range (2.7V to 12V). However, AD8031ARZ-REEL provides enhanced performance with 35V/µs slew rate and 80 MHz bandwidth versus TS971ID's 4V/µs and 12 MHz. The maximum operating temperature is limited to 85°C. Substitution is appropriate for applications not requiring operation above 85°C and where higher bandwidth is beneficial or acceptable.

Q: Why does AD8031ARZ-REEL have lower output current per channel (15 mA) compared to TS971ID (100 mA)?

A: AD8031ARZ-REEL is a voltage feedback amplifier architecture optimized for higher bandwidth and slew rate performance, resulting in lower output current capability. Applications requiring 100 mA output current must use TL971 series parts or verify that the AD8031ARZ-REEL's 15 mA output current is sufficient for the intended load impedance.

Q: What is the significance of TL971QDRQ1 being AEC-Q100 qualified?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. TL971QDRQ1 is appropriate for automotive applications and applications requiring automotive-grade component certification. Non-automotive applications can use TL971IDR or TL971ID without requiring this qualification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts (TL971ID, TL971IDR, TL971QDRQ1, and AD8031ARZ-REEL) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the TS971ID's compliance status. This ensures compatibility with modern manufacturing processes and environmental regulations.

Q: Can TS971ID be used in applications with operating temperatures above 85°C?

A: Yes. TS971ID is rated for -40°C to 125°C operation. If substituting with AD8031ARZ-REEL, the maximum operating temperature is limited to 85°C. For applications requiring operation above 85°C, use TL971 series parts (TL971ID, TL971IDR, or TL971QDRQ1), which maintain the full -40°C to 125°C temperature range.

Q: What packaging options are available for substitute parts?

A: TL971IDR is supplied in Cut Tape and Digi-Reel packaging for automated assembly. TL971ID is supplied in tube packaging for manual assembly. TL971QDRQ1 is supplied in Tape & Reel packaging. AD8031ARZ-REEL is supplied in Cut Tape and Digi-Reel packaging. Selection depends on assembly process requirements and production volume.

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