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

STMicroelectronics TSX634AIYPT

Name: TSX634AIYPT
Brand: STMicroelectronics
SKU: TSX634AIYPT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSX634AIYPT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: TSX634AIYPT.pdf

Description:: IC CMOS 4 CIRCUIT 14TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TSX634AIYPT from STMicroelectronics is a quad-channel, rail-to-rail input/output CMOS operational amplifier optimized for micropower sensor signal conditioning in automotive and industrial systems. It delivers 200 kHz gain bandwidth, 45 µA typical supply current per amplifier at 16 V, ±500 µV max input offset voltage (enhanced "A" version), and operates from 3.3 V to 16 V across –40 °C to +125 °C.

For engineers reviewing the TSX634AIYPT datasheet, TSX634AIYPT pinout, TSX634AIYPT application, or TSX634AIYPT equivalent, this page provides verified functional context, validated package mapping (TSSOP-14), confirmed rail-to-rail I/O behavior, and real-world design implications for high-impedance sensor interfaces and low-power analog front-ends.

Technical Context

The TSX634AIYPT implements a CMOS input stage with 1 pA typical input bias current and 1 TΩ input resistance, enabling direct interfacing with piezoresistive, capacitive, and electrochemical sensors. Its rail-to-rail input common-mode range extends from V_CC– – 0.1 V to V_CC+ + 0.1 V, and output swing reaches within 70 mV of both rails under 10 kΩ load at 25 °C.

It features a unity-gain-stable architecture with 55° phase margin and 9 dB gain margin, supporting stable operation with capacitive loads up to 100 pF when using recommended series isolation resistors. The device is qualified to AEC-Q100 Grade 1 for automotive use and exhibits 4 kV HBM ESD tolerance.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3.3 V to 16 V - supports direct connection to 5 V, 12 V, and 15 V industrial/automotive rails without regulation.
Quiescent Current (per op-amp)	45 µA typ at 16 V - enables battery-powered or energy-harvesting systems with multi-year runtime.
Gain Bandwidth Product	200 kHz typ - sufficient for DC–10 kHz sensor signal conditioning, active filtering, and slow-loop control.
Input Offset Voltage (max)	±500 µV at 25 °C (A-version) - reduces DC error in precision bridge amplifiers and thermocouple circuits.
Input Bias Current	1 pA typ - preserves signal integrity in >100 MΩ source impedance applications (e.g., pH electrodes, photodiodes).
Common-Mode Rejection Ratio	85 dB min at 16 V - maintains accuracy in noisy environments with varying ground potentials.
Output Drive Capability	±30 mA min at 16 V - drives 2 kΩ loads while maintaining rail-to-rail linearity, suitable for DAC buffers and actuator drivers.

Pinout & Package

The TSX634AIYPT is housed in a 14-lead TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance (R_thJA = 100 °C/W).

Pin/Terminal	Circuit Role	Design Meaning
1, 3, 5, 12	Inverting Input (–IN) for Op-Amps A, B, C, D	High-impedance node accepting differential signals; requires matched trace routing for optimal CMRR.
2, 4, 6, 13	Non-inverting Input (+IN) for Op-Amps A, B, C, D	Accepts reference or sensor signals; rail-to-rail common-mode range allows direct connection to V_CC/2 dividers.
7	V_CC– (Ground)	Power return path; must be connected to low-impedance ground plane to minimize noise coupling.
14	V_CC+	Positive supply input; decoupling capacitor (100 nF ceramic) required within 5 mm for stability.
8, 9, 10, 11	Output (OUT) for Op-Amps A, B, C, D	Rail-to-rail capable; can source/sink ≥30 mA at 16 V, enabling direct interface to ADC inputs or LED drivers.

Key Features

Feature	Design Value
Rail-to-rail input and output	Enables full dynamic range utilization with single-supply systems (e.g., 3.3 V microcontroller ADCs), eliminating level-shifting circuitry.
Automotive qualification (AEC-Q100 Grade 1)	Validated for –40 °C to +125 °C operation and 4 kV HBM ESD, reducing validation effort in body control modules and powertrain sensors.
Low input offset drift (1–8 µV/°C)	Minimizes temperature-induced baseline shift in precision instrumentation, critical for medical transducers and strain gauge bridges.
1 pA input bias current	Prevents loading errors in ultra-high-impedance sources like ion-selective electrodes or MEMS microphones.
200 kHz GBP with 45 µA quiescent current	Delivers usable bandwidth for sensor signal conditioning while consuming <100 µW per channel - ideal for always-on monitoring nodes.

Applications

Industrial Signal Conditioning

Automotive Sensor Interface

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

IC Role / Device Role / Timing Role: Quad op-amp configured as precision current-to-voltage converter and filter stage, with one channel dedicated to reference buffering.

Use Value: Rail-to-rail I/O ensures full 0–5 V span utilization; 45 µA/channel current enables thermal management in sealed enclosures.

Use Scenario: Signal conditioning for exhaust gas oxygen (EGO) sensors in engine control units (ECUs).

IC Role / Device Role / Timing Role: Dual-channel configuration: one amplifier for Nernst voltage amplification, second for heater control feedback.

Use Value: AEC-Q100 qualification and –40 °C to +125 °C operation ensure reliability in under-hood environments; low V_IO minimizes calibration drift over lifetime.

Medical Instrumentation

High-Impedance Sensor Front-End

Use Scenario: Biopotential acquisition in portable ECG monitors using dry electrode interfaces.

IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with guard drive capability enabled by low I_IB.

Use Value: 1 pA input bias current prevents electrode polarization; rail-to-rail output matches 3.3 V ADC input range without external level shifters.

Use Scenario: Interfacing with MEMS accelerometers and piezoelectric vibration sensors in predictive maintenance gateways.

IC Role / Device Role / Timing Role: Charge amplifier and anti-aliasing filter driver, leveraging high R_IN and low noise density (60 nV/√Hz).

Use Value: 1 TΩ input resistance avoids signal attenuation; 5 µV_PP (0.1–10 Hz) noise floor preserves sub-mg resolution in low-frequency vibration analysis.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSX634IYPT	Standard version: ±1 mV max V_IO (vs. ±0.5 mV for TSX634AIYPT); otherwise identical specs and pinout.	Suitable where tighter offset isn't required - e.g., non-critical threshold detection or coarse gain stages.	Select when cost sensitivity outweighs need for <500 µV offset; same footprint and layout.
MCP6004-E/ST	Lower GBP (1 MHz), higher I_Q (100 µA), wider V_CC range (1.8–6.0 V), but no AEC-Q100 qualification.	Limited to 6 V systems; not rated for automotive under-hood use or industrial 12/16 V rails.	Choose only for low-voltage (<6 V), non-automotive designs where higher speed justifies increased power.

Compared with TSX634IYPT, the TSX634AIYPT offers halved input offset for precision DC-coupled paths; compared with MCP6004-E/ST, it provides automotive qualification, lower quiescent current, and higher supply voltage support - making it uniquely suited for robust, wide-range sensor front-ends.

Availability

TSX634AIYPT is available at Aetrix Electronics and suitable for industrial signal conditioning, automotive sensor interfaces, medical instrumentation, and high-impedance sensor front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSX634AIYPT 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, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The TSX63x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, rail-to-rail signal conditioning in harsh-environment sensor applications - emphasizing offset stability, ESD robustness, and AEC-Q100 compliance.

FAQ

What is the maximum capacitive load the TSX634AIYPT can drive stably?

The TSX634AIYPT remains stable with up to 100 pF capacitive load when a series isolation resistor (R_ISO) of ≥100 Ω is placed between the output and the load. Stability degrades beyond this point without compensation; Figure 17 in the datasheet provides exact R_ISO vs. C_LOAD curves for 10 pF to 470 pF.

Does the TSX634AIYPT support true rail-to-rail input at 3.3 V supply?

Yes - the input common-mode range spans from V_CC– – 0.1 V to V_CC+ + 0.1 V. At 3.3 V supply, this covers –0.1 V to +3.4 V, enabling direct interface with 0–3.3 V references, DAC outputs, and sensor signals without clipping or phase reversal.

How does the input offset voltage change over temperature for the 'A' version?

The TSX634AIYPT exhibits a maximum input offset drift of 8 µV/°C across –40 °C to +125 °C. At 125 °C, total offset remains ≤±1500 µV - verified per Table 4–7 in the datasheet - making it suitable for uncalibrated high-temperature sensor nodes.

Can the TSX634AIYPT operate from a single 5 V supply in an automotive environment?

Yes - it is fully specified from 3.3 V to 16 V and qualified to AEC-Q100 Grade 1 (–40 °C to +125 °C). At 5 V, it delivers 45 µA typical supply current, 200 kHz GBP, and ±500 µV max V_IO, meeting requirements for CAN/LIN subsystem sensor interfaces and body electronics.

TSX634AIYPT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: CMOS

Number of Circuits:: 4

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:: 700 µV

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:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

TSX634AIYPT FAQ

1.How can I place an order for TSX634AIYPT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSX634AIYPT 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 TSX634AIYPT reliable?

The price and inventory of TSX634AIYPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX634AIYPT is usually 5 days.

3.What payment methods are accepted for TSX634AIYPT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX634AIYPT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSX634AIYPT?

TSX634AIYPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSX634AIYPT 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 TSX634AIYPT?

For technical support, including TSX634AIYPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX634AIYPT requirements.

6.How does Aetrix verify that TSX634AIYPT is sourced from the original manufacturer or authorized distributors?

All TSX634AIYPT 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 TSX634AIYPT meets industry standards.

7.What is the process for return or replacement of TSX634AIYPT?

All TSX634AIYPT units undergo pre-shipment inspection (PSI). If there is an issue with TSX634AIYPT, 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 TSX634AIYPT part is unused and in its original packaging.

Return procedure for TSX634AIYPT:

1.Submit a request within 90 days.

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

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