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

STMicroelectronics TSX632IST

Name: TSX632IST
Brand: STMicroelectronics
SKU: TSX632IST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSX632IST

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: TSX632IST.pdf

Description:: IC CMOS 2 CIRCUIT 8MINISO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TSX632IST from STMicroelectronics is a dual rail-to-rail input/output micropower CMOS operational amplifier optimized for low-voltage, high-impedance sensor interfaces and automotive signal conditioning. It delivers 200 kHz gain bandwidth, 45 µA supply current per amplifier at 16 V, ±500 µV max offset voltage (A-version), 1 pA typical input bias current, and operates from 3.3 V to 16 V across –40°C to +125°C.

For engineers reviewing the TSX632IST datasheet, TSX632IST pinout, TSX632IST application, or TSX632IST equivalent, key selection criteria include micropower operation under 60 µA, rail-to-rail I/O swing in single-supply systems, low offset drift (<8 µV/°C), high CMRR (>79 dB), and AEC-Q100 qualification for automotive use.

Technical Context

The TSX632IST implements a CMOS input stage enabling 1 pA typical input bias current and 1 TΩ input resistance, supporting direct interfacing with piezoelectric, pH, and photodiode sensors. Its rail-to-rail input common-mode range extends from V_CC– – 0.1 V to V_CC+ + 0.1 V, and output swings within 70 mV of each rail at 10 kΩ load.

It features a 200 kHz gain-bandwidth product with 55° phase margin and 0.12 V/µs slew rate-optimized for stable unity-gain follower and active filter configurations. The device maintains 60 µA max ICC across –40°C to +125°C and achieves 4 kV HBM ESD tolerance.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.3 V to 16 V - supports wide-range industrial and automotive battery-supplied systems without level-shifting.
Quiescent Current	45 µA typ / 60 µA max per op-amp - enables multi-year battery life in portable sensor nodes.
Gain Bandwidth Product	200 kHz typ - sufficient for DC–100 Hz instrumentation, anti-aliasing filters, and slow-loop control feedback.
Input Offset Voltage	±500 µV max (TSX632A) - ensures <1 LSB error in 12-bit ADC front-ends with gain ≤10.
Input Bias Current	1 pA typ - minimizes voltage error across >100 MΩ source impedances (e.g., glass pH electrodes).
CMRR	79 dB min (at 25°C) - rejects common-mode noise in noisy 12 V automotive power domains.
Operating Temperature	–40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and chassis-mounted applications.

Pinout & Package

TSX632IST is housed in a MiniSO-8 (SOIC-8) package, 3.9 mm × 4.9 mm, with standard dual op-amp pinout compatible with industry references such as LM358 and TS912.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting Input (Amplifier A)	High-impedance node accepting differential signal; accepts rail-to-rail common-mode voltage.
2	Non-inverting Input (Amplifier A)	High-impedance node; matched to Pin 1 for minimal input offset voltage contribution.
3	Output (Amplifier A)	Rail-to-rail output capable of sourcing/sinking ≥4.3 mA at 25°C into 10 kΩ load.
4	V_CC– (Ground)	Power return reference; must be low-impedance for noise immunity in mixed-signal PCB layouts.
5	Non-inverting Input (Amplifier B)	Independent input for second channel; electrically isolated from Amplifier A except via shared supply rails.
6	Inverting Input (Amplifier B)	Matched to Pin 5; supports differential pair configuration or independent signal conditioning path.
7	Output (Amplifier B)	Full rail-to-rail swing; identical AC/DC specs to Pin 3, enabling dual-channel synchronous processing.
8	V_CC+	Positive supply rail; supports up to 16 V; decoupling capacitor (100 nF) required within 5 mm for stability.

Key Features

Feature	Design Value
Rail-to-rail input and output	Enables full dynamic range utilization in single-supply 3.3 V or 5 V systems without level-shifting circuitry.
1 pA typical input bias current	Permits direct connection to ultra-high-impedance sources (e.g., ion-selective electrodes) without guard rings or bias compensation.
AEC-Q100 qualified	Validated for automotive applications including engine control modules, body electronics, and ADAS sensor preprocessing.
4 kV HBM ESD rating	Reduces need for external protection components in assembly-line handling and field-deployed industrial environments.
200 kHz GBP with 55° phase margin	Ensures stable unity-gain follower operation with capacitive loads up to 100 pF without isolation resistors.

Applications

Industrial Signal Conditioning

Automotive Sensor Interface

Use Scenario: Amplifying low-level outputs from RTD, thermocouple, or strain gauge bridges in PLC analog input modules.

IC Role / Device Role / Timing Role: Precision buffer and gain stage with rail-to-rail I/O, minimizing headroom loss in 24 V-powered industrial backplanes.

Use Value: 45 µA quiescent current allows integration into energy-constrained modular I/O systems without thermal derating.

Use Scenario: Front-end amplification of signals from crankshaft position, oxygen, or cabin air quality sensors in engine control units.

IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing matched DC performance across temperature for differential sensing.

Use Value: ±500 µV max V_io (A-version) and 8 µV/°C drift ensure <0.5% measurement error over full automotive temperature range.

Active Filtering

Medical Instrumentation

Use Scenario: 2nd-order Sallen-Key low-pass filtering of ECG or EEG analog front-ends to suppress 50/60 Hz interference.

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

Use Value: 200 kHz GBP and 55° phase margin allow clean 100 Hz cutoff design with 1% passband flatness and no peaking.

Use Scenario: Biopotential amplification in portable patient monitors where size, power, and electrode compatibility are critical.

IC Role / Device Role / Timing Role: High-input-impedance, low-noise first-stage amplifier for dry-electrode ECG acquisition.

Use Value: 1 pA input bias current prevents polarization errors on skin-contact electrodes; 5 µV_pp 0.1–10 Hz noise enables sub-µV signal resolution.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSX632IPT	Same die, TSSOP-8 package (3 × 3 mm); 100 °C/W R_thJA vs. 190 °C/W for MiniSO-8.	Better thermal performance in high-density PCBs; requires different footprint and reflow profile.	Select for space-constrained designs needing lower junction temperature rise at 60 µA per channel.
LMV358IDR	Higher 100 µA ICC, 1 mV V_io, non-AEC-Q100; 1 MHz GBP but higher noise (40 nV/√Hz).	Suitable for cost-sensitive consumer applications; not rated for automotive temperature or reliability stress.	Choose only for non-automotive, non-critical industrial use where 200 kHz bandwidth suffices and offset <500 µV is not required.

Compared with TSX632IPT, TSX632IST offers superior thermal resistance in legacy SOIC footprints but larger board area; versus LMV358IDR, it delivers half the supply current, tighter offset, and automotive qualification-justifying its use in safety- or longevity-critical systems.

Availability

TSX632IST is available at Aetrix Electronics and suitable for industrial signal conditioning, automotive sensor interface, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSX632IST 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 microcontrollers, power ICs, sensors, and analog products 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 environments-including under-hood automotive and factory-floor industrial settings.

FAQ

What is the maximum capacitive load the TSX632IST can drive without instability?

The TSX632IST remains unity-gain stable with capacitive loads up to 100 pF when using recommended PCB layout practices (short traces, local 100 nF decoupling). For loads >100 pF, a series isolation resistor (R_iso ≥ 10 Ω) is required-per Figure 17 in the datasheet-to maintain ≥45° phase margin. No external compensation network is needed below this threshold.

Does TSX632IST support true rail-to-rail input when V_CC = 3.3 V?

Yes. At 3.3 V supply, the input common-mode range is specified from –0.1 V to V_CC + 0.1 V (i.e., –0.1 V to 3.4 V), fully covering the supply rails. This enables direct interfacing with 3.3 V logic outputs and sensors operating near ground or V_CC, with no clipping or distortion in follower or inverting configurations.

How does the TSX632IST's input offset voltage compare between standard and "A" versions?

The TSX632IST is the "A" version: it guarantees ±500 µV max input offset voltage at 25°C and ±1.5 mV max over –40°C to +125°C. The standard TSX632 limits are ±1 mV (25°C) and ±2.4 mV (full temperature range). This 2× tighter V_io spec directly improves DC accuracy in precision gain stages and 12-bit+ data acquisition systems.

Is the TSX632IST pin-compatible with legacy dual op-amps like LM358?

No. TSX632IST uses the MiniSO-8 package with standard dual op-amp pinout (Pins 1–3, 5–7 as I/O; Pin 4 = GND; Pin 8 = V_CC+), matching TS912 and TLV2372-but not LM358 (which places V_CC+ on Pin 8 and GND on Pin 4 in SOIC-8). Physical fit is identical, but signal routing must follow TSX632IST's pin mapping to avoid functional failure.

TSX632IST Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: CMOS

Number of Circuits:: 2

Output Type:: Rail-to-Rail

Slew Rate:: 0.12V/µs

Gain Bandwidth Product:: 200 kHz

-3db Bandwidth:: -

Current - Input Bias:: 1 pA

Voltage - Input Offset:: 1.6 mV

Current - Supply:: 45µA

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:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-MiniSO

TSX632IST FAQ

1.How can I place an order for TSX632IST through Aetrix?

Please submit a Request for Quotation (RFQ) for TSX632IST 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 TSX632IST reliable?

The price and inventory of TSX632IST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX632IST is usually 5 days.

3.What payment methods are accepted for TSX632IST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX632IST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSX632IST?

TSX632IST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSX632IST 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 TSX632IST?

For technical support, including TSX632IST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX632IST requirements.

6.How does Aetrix verify that TSX632IST is sourced from the original manufacturer or authorized distributors?

All TSX632IST 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 TSX632IST meets industry standards.

7.What is the process for return or replacement of TSX632IST?

All TSX632IST units undergo pre-shipment inspection (PSI). If there is an issue with TSX632IST, 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 TSX632IST part is unused and in its original packaging.

Return procedure for TSX632IST:

1.Submit a request within 90 days.

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

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