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

STMicroelectronics TSX631AIYLT

Name: TSX631AIYLT
Brand: STMicroelectronics
SKU: TSX631AIYLT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSX631AIYLT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: SC-74A, SOT-753

Datasheet:: TSX631AIYLT.pdf

Description:: IC OPAMP GP 1 CIRCUIT SOT23-5

Quantity:: RFQ Add To RFQ list

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Inventory:2,966

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Product details

Overview

TSX631AIYLT from STMicroelectronics is a micropower, rail-to-rail input/output CMOS operational amplifier optimized for high-impedance sensor interfaces and automotive signal conditioning. It delivers 200 kHz gain bandwidth, 45 µA supply current at 16 V, ±500 µV max input offset voltage (enhanced "A" version), 1 pA typical input bias current, and operates from 3.3 V to 16 V supply rails.

For engineers reviewing the TSX631AIYLT datasheet, TSX631AIYLT pinout, TSX631AIYLT application, or TSX631AIYLT equivalent, this device is selected for ultra-low-power precision amplification in harsh-temperature industrial and automotive environments where rail-to-rail swing, low offset drift, and high ESD tolerance (4 kV HBM) are critical.

Technical Context

The TSX631AIYLT implements a CMOS input stage with rail-to-rail common-mode input range (V_CC−0.1 V to V_CC+0.1 V) and rail-to-rail output swing (within 70 mV of rails at 10 kΩ load). Its 200 kHz GBP and 0.12 V/µs slew rate support stable DC-coupled and low-frequency AC signal conditioning without phase margin degradation across temperature (−40°C to +125°C).

It features 1 TΩ input resistance, 5 pF input capacitance, and dual common-mode rejection specifications (65–85 dB depending on input range), enabling accurate amplification of weak signals from high-Z sources such as piezoresistive sensors or thermopiles while rejecting supply and ground noise.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.3 V to 16 V - supports direct interface with 3.3 V microcontrollers and 12 V automotive batteries without level-shifting.
Quiescent Current	45 µA typ / 60 µA max at 16 V - enables multi-year battery life in wireless sensor nodes and portable instrumentation.
Input Offset Voltage	±500 µV max at 25°C (A-version) - ensures sub-mV error in 12-bit ADC front-ends without trimming.
Gain Bandwidth Product	200 kHz typ - sufficient for anti-aliasing filters, active RC filters, and sensor linearization up to ~20 kHz.
Input Bias Current	1 pA typ - preserves signal integrity when amplifying from >1 GΩ sources (e.g., pH electrodes, photodiodes).
Common-Mode Range	V_CC−0.1 V to V_CC+0.1 V - allows direct sensing of signals referenced to supply rails, simplifying single-supply design.
ESD Rating	4 kV HBM - meets automotive AEC-Q100 stress requirements for robustness in engine control and body electronics.

Pinout & Package

SOT23-5 package: compact 2.9 mm × 1.6 mm surface-mount footprint with exposed pad for thermal enhancement; suitable for space-constrained PCB layouts in automotive ECUs and portable medical devices.

Pin/Terminal	Circuit Role	Design Meaning
1 - Output	Amplified signal output	Rail-to-rail swing (70 mV from rails) enables full dynamic range utilization into 10 kΩ loads.
2 - Inverting Input (−)	Differential input node	1 pA bias current minimizes voltage error across feedback networks ≥1 MΩ.
3 - Non-inverting Input (+)	Differential input node	Supports common-mode voltages up to V_CC+0.1 V - enables high-side sensing without external resistive dividers.
4 - V_CC− (GND)	Negative supply reference	Ground connection for single-supply operation; ties to system 0 V plane with low-inductance path.
5 - V_CC+	Positive supply input	Accepts 3.3–16 V; internal protection allows transient overvoltage up to 18 V per absolute max rating.

Key Features

Feature	Design Value
Rail-to-rail I/O	Enables full-scale signal capture in single-supply systems (e.g., 0–3.3 V ADC inputs) without headroom loss.
Automotive qualification	AEC-Q100 Grade 1 (−40°C to +125°C) and 4 kV HBM ESD ensure reliability in under-hood and chassis-mounted modules.
Low offset drift	1–8 µV/°C over −40°C to +125°C - maintains <1.5 mV total offset error across full automotive temperature range.
High input impedance	1 TΩ \|\| 5 pF - prevents loading of high-Z transducers (e.g., capacitive humidity sensors, strain gauges).
Micropower operation	45 µA quiescent current at 16 V - reduces self-heating and enables use in thermally isolated sensor housings.

Applications

Industrial Signal Conditioning

Automotive Sensor Interface

Use Scenario: Amplifying low-level output from 4–20 mA loop-powered pressure transmitters in factory automation PLCs.

IC Role / Device Role / Timing Role: Precision buffer and level-shifter converting transducer mV output to 0–3.3 V for SAR ADC sampling.

Use Value: Rail-to-rail output swing maximizes ADC effective resolution; 45 µA supply current extends module uptime during brownout conditions.

Use Scenario: Front-end amplification of thermistor voltage divider outputs in HVAC climate control modules.

IC Role / Device Role / Timing Role: High-Z buffer isolating thermistor network from microcontroller ADC input, minimizing self-heating error.

Use Value: 1 pA input bias current eliminates offset shift due to thermistor series resistance; AEC-Q100 rating ensures 15-year field reliability.

Active Filtering

Medical Instrumentation

Use Scenario: 2nd-order Sallen-Key low-pass filter (10 kHz cutoff) for ECG electrode signal conditioning.

IC Role / Device Role / Timing Role: Unity-gain stable amplifier implementing filter transfer function with minimal phase distortion.

Use Value: 200 kHz GBP provides >20× gain margin at 10 kHz; rail-to-rail input accepts bipolar electrode signals centered at mid-supply.

Use Scenario: Amplifying microvolt-level bio-potential signals from dry-contact EEG electrodes.

IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with ultra-low input current to prevent electrode polarization.

Use Value: 1 pA bias current avoids DC drift in high-impedance electrode paths; 5 µVpp low-frequency noise preserves SNR in sub-10 Hz neural bands.

Equivalent & Alternatives

The following parts are listed as comparable options for similar op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSX631IYLT	Standard version: ±1 mV max V_IO at 25°C (vs. ±500 µV for A-version); same package, GBW, and supply current.	Acceptable for cost-sensitive industrial controls where 12-bit accuracy suffices; not recommended for automotive AEC-Q100 designs requiring tighter offset.	Select TSX631IYLT only if V_IO budget permits 2× higher initial offset and long-term drift is mitigated by calibration.
TSX561IST	Higher GBP (900 kHz), 1 µA I_IB, but 125 µA I_CC; SOT23-5 package, same voltage range.	Better for active filters above 50 kHz or faster settling; unsuitable for battery-powered nodes due to 2.8× higher quiescent power.	Choose TSX561IST when bandwidth >500 kHz is required and power budget allows >100 µA per channel.

Compared with TSX631IYLT, the TSX631AIYLT offers half the input offset voltage and guaranteed AEC-Q100 compliance-critical for uncalibrated automotive sensors-while TSX561IST trades micropower for bandwidth, making it viable only in mains-powered signal chains demanding faster dynamics.

Availability

TSX631AIYLT is available at Aetrix Electronics and suitable for industrial signal conditioning, automotive sensor interfaces, active filtering, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSX631AIYLT 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, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The TSX63x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, high-accuracy signal conditioning in harsh-environment applications where rail-to-rail performance and automotive-grade reliability are mandatory.

FAQ

Is TSX631AIYLT qualified for automotive applications?

Yes. TSX631AIYLT is AEC-Q100 Grade 1 qualified (−40°C to +125°C operating range) and features 4 kV HBM ESD protection, 200 V MM, and 1.3 kV CDM ratings. Its input offset voltage drift (1–8 µV/°C) and long-term stability (3.4 µV/month at 25°C) meet automotive sensor interface requirements without periodic recalibration.

What is the maximum capacitive load the TSX631AIYLT can drive stably?

Per Figure 16 and 17 in the datasheet, TSX631AIYLT remains unity-gain stable with ≤100 pF capacitive load when driving 100 kΩ. For loads >100 pF, a series isolation resistor (R_iso) ≥10 Ω is required-e.g., 100 Ω for 470 pF-to maintain phase margin >45° and prevent oscillation in active filter or ADC driver configurations.

Does TSX631AIYLT support true rail-to-rail input at 3.3 V supply?

Yes. The common-mode input range extends from V_CC−0.1 V to V_CC+0.1 V. At 3.3 V supply, this covers 3.2 V to 3.4 V - enabling direct interface with 3.3 V logic outputs and high-side sensing. Input stage CMOS architecture ensures no phase reversal or latch-up within this range, even with inputs driven beyond rails by ≤0.2 V.

How does input offset voltage change with temperature for TSX631AIYLT?

TSX631AIYLT exhibits ΔV_IO/ΔT of 1–8 µV/°C over −40°C to +125°C. At 125°C, maximum offset is 1500 µV (1.5 mV), compared to 500 µV at 25°C. This 1 mV total drift is verified across production lots (Figure 5) and remains within 12-bit ADC LSB error (±1.22 mV at 5 V full scale) without trimming.

TSX631AIYLT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 1

Output Type:: Rail-to-Rail

Slew Rate:: 0.12V/µs

Gain Bandwidth Product:: 200 kHz

-3db Bandwidth:: -

Current - Input Bias:: 100 pA

Voltage - Input Offset:: 700 µV

Current - Supply:: 60µA

Current - Output / Channel:: 92 mA

Voltage - Supply Span (Min):: 3.3 V

Voltage - Supply Span (Max):: 16 V

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TSX631AIYLT FAQ

1.How can I place an order for TSX631AIYLT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSX631AIYLT 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 TSX631AIYLT reliable?

The price and inventory of TSX631AIYLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX631AIYLT is usually 5 days.

3.What payment methods are accepted for TSX631AIYLT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX631AIYLT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSX631AIYLT?

TSX631AIYLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSX631AIYLT 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 TSX631AIYLT?

For technical support, including TSX631AIYLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX631AIYLT requirements.

6.How does Aetrix verify that TSX631AIYLT is sourced from the original manufacturer or authorized distributors?

All TSX631AIYLT 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 TSX631AIYLT meets industry standards.

7.What is the process for return or replacement of TSX631AIYLT?

All TSX631AIYLT units undergo pre-shipment inspection (PSI). If there is an issue with TSX631AIYLT, 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 TSX631AIYLT part is unused and in its original packaging.

Return procedure for TSX631AIYLT:

1.Submit a request within 90 days.

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

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