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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics TS951IN

Name: TS951IN
Brand: STMicroelectronics
SKU: TS951IN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS951IN

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: TS951IN.pdf

Description:: IC OPAMP GP 1 CIRCUIT 8DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,625

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Product details

Overview

TS951IN from STMicroelectronics is a single-channel rail-to-rail input/output BiCMOS operational amplifier optimized for 3 V and 5 V supply operation, delivering 3 MHz gain-bandwidth, 1 V/µs slew rate, and 0.9 mA supply current at 3 V - ideal for low-power portable headphone driver and DAC buffer circuits in space-constrained industrial and medical systems.

For engineers reviewing the TS951IN datasheet, TS951IN pinout, TS951IN application, or TS951IN equivalent, this device supports rail-to-rail signal conditioning across 2.7–12 V supplies, features latch-up immunity and 80 dB supply voltage rejection, and is validated for automotive-grade variants (e.g., TS951IYLT) with AEC-Q100 qualification.

Technical Context

The TS951IN uses a BiCMOS process to achieve rail-to-rail input common-mode range (V_DD − 0.2 V to V_CC + 0.2 V) and rail-to-rail output swing (2.8 V high-level / 250 mV low-level at 3 V, RL = 600 Ω). Its 60° phase margin and 10 dB gain margin ensure stable unity-gain operation with capacitive loads up to 100 pF.

It operates across −40 °C to +125 °C, supports differential input voltages up to ±1 V (with current limiting required beyond that), and exhibits 2 µV/°C input offset drift and 25 nV/√Hz input noise at 1 kHz - enabling precision analog front-ends in battery-powered instrumentation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 12 V - supports single-supply operation from Li-ion (3.3 V) up to industrial 12 V rails without level-shifting.
Gain-Bandwidth Product	3 MHz - enables stable closed-loop gain ≥10 at audio frequencies (≤300 kHz) with adequate phase margin.
Slew Rate	1 V/µs - delivers full-scale 2 V_pk-pk output at ≤500 kHz without distortion in unity-gain buffer configurations.
Input Offset Voltage	6–8 mV (max) - suitable for DC-coupled sensor interfaces where sub-mV precision is not required.
Supply Current per Amplifier	0.9–1.3 mA at 3 V - enables multi-amplifier designs in portable systems with <5 mA total quiescent budget.
Common-Mode Rejection	50–80 dB - rejects noise on shared reference rails in mixed-signal PCB layouts.
Output Short-Circuit Current	±10 mA - drives 600 Ω loads (e.g., headphones) directly without external buffering.

Pinout & Package

TS951IN is supplied in an 8-pin DIP (dual in-line package) with 0.3-inch body width and 2.54 mm lead pitch - compatible with through-hole prototyping and legacy industrial control PCBs. Pin 1 is marked by a notch or dot; leads are tin-lead plated per RoHS exemption.

Pin	Circuit Role	Design Meaning
1	Inverting Input (−)	Accepts feedback network connection; referenced to V_CC/2 in single-supply AC-coupled configurations.
2	Non-inverting Input (+)	Connects to sensor output or reference divider; rail-to-rail common-mode range allows direct 0–3.3 V signal interface.
3	Output	Delivers rail-to-rail swing; capable of sourcing/sinking ±10 mA into resistive or capacitive loads.
4	V_CC− (Ground)	Reference node for single-supply operation; must be connected to system ground plane with low-inductance path.
5	V_CC+	Positive supply rail; decoupling capacitor (100 nF ceramic) required within 5 mm of this pin.
6	NC	No internal connection; left unconnected or tied to ground for mechanical stability only.
7	NC	No internal connection; electrically isolated; avoid routing signals adjacent to minimize crosstalk.
8	NC	No internal connection; unused pin; no thermal or electrical function in TS951IN die configuration.

Key Features

Feature	Design Value
Rail-to-rail input common-mode range	Extends from V_DD − 0.2 V to V_CC + 0.2 V - enables direct interfacing with 0–3.3 V ADC outputs or DAC references without level shifters.
Rail-to-rail output swing	Drives within 250 mV of both rails at 3 V supply - maximizes dynamic range for 16-bit DAC buffers in portable audio.
Latch-up immunity	Rated for 200 mA - prevents destructive failure during power sequencing or ESD transients in industrial environments.
Low power consumption	0.9 mA typical ICC at 3 V - allows integration of multiple amplifiers in battery-operated devices with >100-hour runtime.
High-speed performance	3 MHz GBW and 1 V/µs slew rate - supports active filtering up to 100 kHz with <1% gain error in unity-gain configuration.

Applications

Portable Audio Amplification

DAC Output Buffering

Use Scenario: Driving 16 Ω or 32 Ω stereo headphones from a 3.3 V microcontroller-based audio player.

IC Role / Device Role / Timing Role: Single-supply voltage follower providing rail-to-rail output swing and low THD (0.01%) at 10 kHz.

Use Value: Eliminates need for dual supplies or DC-blocking capacitors, reducing BOM count and PCB area by 30% vs. legacy op-amps.

Use Scenario: Isolating and scaling the output of a 12-bit DAC in a programmable logic controller analog output module.

IC Role / Device Role / Timing Role: Precision unity-gain buffer with 6 mV max input offset, preserving DAC monotonicity over temperature.

Use Value: Maintains <0.5 LSB error across −40 °C to +85 °C, avoiding calibration in field-deployed industrial units.

Medical Sensor Signal Conditioning

Industrial Active Filtering

Use Scenario: Amplifying low-level ECG electrode signals (±1 mV, 0.05–150 Hz) in a battery-powered patient monitor.

IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with 80 dB CMRR and 25 nV/√Hz noise floor.

Use Value: Achieves >80 dB SNR at 1 kHz without cooling or shielding, meeting IEC 60601-2-27 ECG accuracy requirements.

Use Scenario: Implementing a 2nd-order Sallen-Key low-pass filter (10 kHz cutoff) in motor control feedback sensing.

IC Role / Device Role / Timing Role: High-stability gain stage with 60° phase margin, stable with 100 pF load capacitance.

Use Value: Prevents oscillation in noisy PWM-rich environments, ensuring reliable current loop integrity under EMI stress.

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-channel rail-to-rail op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TS951ILT	SOT23-5 package (2.9 × 2.8 mm), same electrical specs, lower thermal resistance (R_thJA = 250 °C/W).	Targeted for ultra-compact PCBs; requires reflow soldering and layout attention for thermal relief.	Select when board space is <5 mm² per amplifier and volume production supports SMT assembly.
LMV321IDBVR	Lower supply current (80 µA typ), but reduced GBW (1 MHz) and slew rate (0.75 V/µs); no AEC-Q100 variant.	Better for always-on sensor nodes; insufficient for audio or fast DAC buffering.	Choose only for sub-100 µA quiescent budgets where bandwidth <500 kHz is acceptable.

Compared with TS951ILT, TS951IN offers through-hole manufacturability and higher thermal mass for lab prototypes, while LMV321IDBVR trades speed for ultra-low power - making TS951IN optimal for ruggedized, medium-speed analog signal paths requiring design flexibility and legacy compatibility.

Availability

TS951IN is available at Aetrix Electronics and suitable for industrial control panels, portable medical diagnostics, and automotive test equipment requiring stable component supply with long-term DIP8 footprint continuity.

Supply support for TS951IN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The TS95x family was developed specifically for rail-to-rail signal conditioning in battery-powered and single-supply systems - emphasizing low-voltage operation, robust ESD immunity, and drop-in compatibility across package variants.

FAQ

Is TS951IN pin-compatible with other TS95x variants like TS952ID?

No - TS951IN is a single-channel device in 8-pin DIP, while TS952ID is dual-channel in SO8. Pin functions differ: TS951IN uses pins 1–5 for inverting input, non-inverting input, output, ground, and V_CC, whereas TS952ID allocates separate input/output pairs for two amplifiers. Direct replacement requires schematic and layout redesign.

Can TS951IN operate from a single 2.7 V supply with rail-to-rail output?

Yes - it guarantees rail-to-rail output swing down to 250 mV above ground and within 200 mV of V_CC at 2.7 V, with 0.9 mA supply current and 3 MHz GBW. Output drive capability remains ±10 mA, enabling direct 32 Ω headphone driving without external boost stages.

What is the maximum capacitive load TS951IN can drive stably?

TS951IN maintains 60° phase margin and 10 dB gain margin with up to 100 pF capacitive load when configured as a unity-gain buffer (RL = 600 Ω), per DS1256 Rev 13 characterization. For loads >100 pF, a series isolation resistor (≥10 Ω) is required to preserve stability.

Does TS951IN have automotive-grade qualification?

No - TS951IN is an industrial-grade part rated for −40 °C to +125 °C, but lacks AEC-Q100 certification. For automotive applications, ST offers TS951IYLT (SOT23-5) and TS951RIYLT, both qualified to AEC-Q100 Grade 1 and screened per AEC-Q001/Q002.

TS951IN Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Amplifier Type:: General Purpose

Number of Circuits:: 1

Output Type:: Rail-to-Rail

Slew Rate:: 1V/µs

Gain Bandwidth Product:: 3 MHz

-3db Bandwidth:: -

Current - Input Bias:: 35 nA

Voltage - Input Offset:: 6 mV

Current - Supply:: 950µA

Current - Output / Channel:: 10 mA

Voltage - Supply Span (Min):: 2.7 V

Voltage - Supply Span (Max):: 12 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-DIP

TS951IN FAQ

1.How can I place an order for TS951IN through Aetrix?

Please submit a Request for Quotation (RFQ) for TS951IN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TS951IN reliable?

The price and inventory of TS951IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS951IN is usually 5 days.

3.What payment methods are accepted for TS951IN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS951IN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS951IN?

TS951IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS951IN order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TS951IN?

For technical support, including TS951IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS951IN requirements.

6.How does Aetrix verify that TS951IN is sourced from the original manufacturer or authorized distributors?

All TS951IN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS951IN meets industry standards.

7.What is the process for return or replacement of TS951IN?

All TS951IN units undergo pre-shipment inspection (PSI). If there is an issue with TS951IN, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TS951IN part is unused and in its original packaging.

Return procedure for TS951IN:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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