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

STMicroelectronics TSX634IYPT

Name: TSX634IYPT
Brand: STMicroelectronics
SKU: TSX634IYPT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSX634IYPT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

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

Datasheet:: TSX634IYPT.pdf

Description:: IC CMOS 4 CIRCUIT 14TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TSX634IYPT 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 channel 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 - enabling direct interfacing with high-impedance sensors in battery-powered or thermally constrained environments.

For engineers reviewing the TSX634IYPT datasheet, TSX634IYPT pinout, TSX634IYPT application, or TSX634IYPT equivalent, key selection criteria include its rail-to-rail I/O capability at ultra-low quiescent current, AEC-Q100 qualification for automotive use, guaranteed 125 °C operation, and TSSOP14 package compatibility with industry-standard quad op-amp layouts.

Technical Context

The TSX634IYPT implements a CMOS input stage with 1 TΩ input resistance and 5 pF input capacitance, enabling stable DC-coupled amplification of high-impedance sources. Its rail-to-rail input common-mode range extends from V_CC– – 0.1 V to V_CC+ + 0.1 V, while rail-to-rail output swing achieves within 70 mV of both rails under 10 kΩ load at 25 °C.

It features a 200 kHz gain-bandwidth product with 55° phase margin and 9 dB gain margin, supporting stable unity-gain follower and low-gain configurations. The device maintains 65–85 dB common-mode rejection ratio across –40 °C to +125 °C and exhibits only 1–8 µV/°C input offset drift over temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3.3 V to 16 V - supports direct connection to 12 V automotive rails and 3.3 V/5 V logic without level-shifting.
Quiescent Current (per channel)	45 µA typ / 60 µA max at 16 V - enables >10-year battery life in always-on sensor nodes.
Gain Bandwidth Product	200 kHz typ - sufficient for anti-aliasing, active filtering, and DC-coupled instrumentation up to ~20 kHz.
Input Offset Voltage (A-version)	±500 µV max at 25 °C - reduces DC error in precision bridge sensor interfaces without trimming.
Input Bias Current	1 pA typ - prevents loading errors in pH electrodes, photodiode transimpedance stages, and piezoelectric sensors.
Operating Temperature Range	–40 °C to +125 °C - qualified for under-hood automotive and industrial control cabinet deployment.
Rail-to-Rail I/O	Input: V_CC– – 0.1 V to V_CC+ + 0.1 V; Output: within 70 mV of rails - maximizes dynamic range in single-supply systems.

Pinout & Package

TSSOP14 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 14-pin thin shrink small outline package with exposed thermal pad (not electrically connected). Pin 1 marked by dot; pin count increases counter-clockwise.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting Input (Channel A)	High-impedance node accepting differential signal reference; compatible with feedback networks up to 10 MΩ.
2	Non-inverting Input (Channel A)	Accepts high-Z sensor signals (e.g., thermistor dividers) without measurable loading error.
3	Output (Channel A)	Drives 10 kΩ loads to within 70 mV of supply rails; supports 4.3 mA sink/source at 25 °C.
4	V_CC– (GND)	Power return for all four channels; requires low-inductance local decoupling (100 nF ceramic).
5	Non-inverting Input (Channel B)	Independent input for second sensor channel; identical electrical specs to Pin 2.
6	Inverting Input (Channel B)	Matches Pin 1 performance; enables dual-channel differential sensing on same die.
7	Output (Channel B)	Provides rail-to-rail output for Channel B; shares no internal coupling with other outputs.
8	Output (Channel C)	Third independent output; allows simultaneous conditioning of three sensor signals (e.g., 3-axis accelerometer).
9	Inverting Input (Channel C)	Third channel inverting input; pin-compatible with industry-standard quad op-amp footprints.
10	Non-inverting Input (Channel C)	Third channel non-inverting input; supports matched-pair configuration with external resistors.
11	V_CC+	Positive supply for all channels; accepts 3.3 V–16 V; must be bypassed locally to Pin 4.
12	Non-inverting Input (Channel D)	Fourth channel input; enables full quad-sensor interface (e.g., multi-parameter environmental monitor).
13	Inverting Input (Channel D)	Fourth channel inverting input; electrically isolated from other channels per datasheet isolation specs.
14	Output (Channel D)	Final rail-to-rail output; capable of driving ADC reference buffers or analog multiplexers directly.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q100 Grade 1 (–40 °C to +125 °C) - certified for engine control, body electronics, and ADAS sensor front-ends.
Rail-to-rail input and output	Enables full-scale signal utilization in single-supply 3.3 V or 12 V systems without negative rail generation.
Ultra-low input bias current (1 pA typ)	Eliminates voltage error in >1 GΩ source impedances - critical for electrochemical and capacitive sensors.
Low offset voltage drift (1–8 µV/°C)	Reduces thermal-induced calibration drift in precision industrial transmitters over wide ambient ranges.
ESD robustness (4 kV HBM)	Withstands handling and board-level ESD events without latch-up or parameter shift - simplifies manufacturing test.

Applications

Industrial Signal Conditioning

Automotive Sensor Interface

Use Scenario: Amplifying low-level outputs from RTD, thermocouple, or strain gauge bridges in programmable logic controllers.

IC Role / Device Role / Timing Role: Quad-channel instrumentation amplifier front-end providing DC-coupled gain, offset correction, and rail-to-rail buffering before ADC sampling.

Use Value: 45 µA per channel quiescent current enables fanless enclosure designs; 1 pA bias current avoids bridge imbalance errors.

Use Scenario: Signal conditioning for cabin temperature, humidity, and CO₂ sensors in HVAC control modules.

IC Role / Device Role / Timing Role: Four independent sensor preamplifiers driving SAR ADC inputs with synchronized sampling.

Use Value: AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime; rail-to-rail I/O maximizes 3.3 V ADC dynamic range.

Active Filtering

Medical Instrumentation

Use Scenario: 2nd-order low-pass filtering of ECG electrode signals to suppress 50/60 Hz mains interference.

IC Role / Device Role / Timing Role: Dual-channel Sallen-Key topology implementation using two TSX634IYPT channels per filter stage.

Use Value: 200 kHz GBP supports precise cutoff at 100 Hz with <0.1 dB passband ripple; low noise (5 µVpp) preserves SNR.

Use Scenario: Front-end amplification for portable blood glucose meters using amperometric enzyme electrodes.

IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) and reference buffer in single-chip glucose sensor ASIC companion.

Use Value: 1 pA input bias current prevents baseline drift during 60-second assay cycles; 125 °C rating supports sterilization validation.

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
TSX634AIDT	Enhanced offset voltage (±500 µV max vs. ±1 mV); otherwise identical pinout, specs, and package.	Required where <1 mV total input-referred DC error is mandatory (e.g., medical calibration standards).	Select TSX634AIDT when tighter initial offset is needed; TSX634IYPT remains optimal for cost-sensitive automotive modules.
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.	Suitable for consumer-grade portable devices, not automotive or industrial harsh-environment use.	Choose MCP6004-E/ST only for 3.3 V battery-powered consumer gear; avoid where temperature or reliability demands exceed 85 °C.

Compared with TSX634AIDT, TSX634IYPT trades 500 µV offset tolerance for lower unit cost and broader production availability; versus MCP6004-E/ST, it provides automotive qualification, lower power, and higher voltage operation at the expense of bandwidth - making it the sole choice for 12 V, 125 °C, AEC-compliant quad-sensor systems.

Availability

TSX634IYPT is available at Aetrix Electronics and suitable for industrial signal conditioning, automotive sensor interface, active filtering, and medical instrumentation requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for TSX634IYPT 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The TSX63x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, high-accuracy sensor signal conditioning in thermally demanding and safety-critical applications.

FAQ

What is the maximum capacitive load the TSX634IYPT can drive stably?

The TSX634IYPT remains stable with up to 100 pF capacitive load when configured as a unity-gain follower with 100 kΩ load resistance. For loads exceeding 100 pF, a series isolation resistor (R_iso) of ≥10 Ω is required - per Figure 17 in the datasheet - to maintain 55° phase margin and prevent peaking or oscillation.

Does TSX634IYPT support true rail-to-rail input at 3.3 V supply?

Yes. At V_CC = 3.3 V, the input common-mode range extends from –0.1 V to +3.4 V, fully covering the supply rails. This allows direct connection of sensors referenced to ground or V_CC, including thermistors and bridge circuits, without external level-shifting circuitry.

How does the TSX634IYPT perform in high-temperature automotive environments?

It is qualified to AEC-Q100 Grade 1 (–40 °C to +125 °C) and maintains full functionality across this range: supply current stays ≤60 µA, offset voltage drift remains ≤8 µV/°C, and output drive capability sustains ≥2.5 mA sink/source at 125 °C - validated per Table 4–7 in the official datasheet.

Can TSX634IYPT replace legacy quad op-amps like LM324 in existing designs?

No direct drop-in replacement: TSX634IYPT uses TSSOP14 (0.65 mm pitch), while LM324 uses SO14 (1.27 mm pitch). Electrical differences include rail-to-rail I/O (vs. limited LM324 input range), lower power (45 µA vs. 1.2 mA), and higher V_CC max (16 V vs. 32 V). Layout and biasing changes are required for migration.

TSX634IYPT 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:: 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:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

TSX634IYPT FAQ

1.How can I place an order for TSX634IYPT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSX634IYPT 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 TSX634IYPT reliable?

The price and inventory of TSX634IYPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX634IYPT is usually 5 days.

3.What payment methods are accepted for TSX634IYPT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX634IYPT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSX634IYPT?

TSX634IYPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSX634IYPT 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 TSX634IYPT?

For technical support, including TSX634IYPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX634IYPT requirements.

6.How does Aetrix verify that TSX634IYPT is sourced from the original manufacturer or authorized distributors?

All TSX634IYPT 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 TSX634IYPT meets industry standards.

7.What is the process for return or replacement of TSX634IYPT?

All TSX634IYPT units undergo pre-shipment inspection (PSI). If there is an issue with TSX634IYPT, 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 TSX634IYPT part is unused and in its original packaging.

Return procedure for TSX634IYPT:

1.Submit a request within 90 days.

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

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