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

STMicroelectronics TSZ181H1YLT

Name: TSZ181H1YLT
Brand: STMicroelectronics
SKU: TSZ181H1YLT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSZ181H1YLT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: SC-74A, SOT-753

Datasheet:: TSZ181H1YLT.pdf

Description:: AUTOMOTIVE-GRADE, VERY HIGH ACCU

Quantity:: RFQ Add To RFQ list

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Inventory:2,603

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Product details

Overview

TSZ181H1YLT from STMicroelectronics is a single-channel, AEC-Q100 qualified zero-drift operational amplifier optimized for high-accuracy automotive sensor signal conditioning. It delivers 70 µV max offset voltage at 25 °C, 100 µV over −40 to +175 °C, rail-to-rail I/O, 3 MHz gain bandwidth, and operates from 2.2–5.5 V supply - enabling precision current measurement in engine control units and battery management systems.

For engineers reviewing the TSZ181H1YLT datasheet, TSZ181H1YLT pinout, TSZ181H1YLT application, or TSZ181H1YLT equivalent, key selection criteria include ultra-low offset drift (0.26 µV/°C), extended temperature operation (−40 to 175 °C), SOT23-5 micropackage compatibility, and EMI rejection ratio up to 85 dB at 2.4 GHz.

Technical Context

This op-amp employs auto-zeroing architecture to achieve near-zero input offset drift versus temperature and time. Its rail-to-rail input stage supports common-mode voltages from (V_CC−) −0.1 V to (V_CC+) +0.1 V, while the rail-to-rail output delivers ±70 mV saturation voltage across full temperature range.

Designed for harsh automotive environments, it integrates EMI hardening (EMIRR ≥52 dB up to 900 MHz, ≥85 dB at 2.4 GHz) and withstands junction temperatures up to 180 °C. The 3 MHz GBP and 4.7 V/µs slew rate support fast settling (600 ns to 0.1%) in high-bandwidth sensor interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
Offset voltage (25 °C)	70 µV max - enables <1 LSB error in 16-bit ADC front-ends without calibration
Offset drift	0.26 µV/°C - ensures stable accuracy across full −40 to +175 °C automotive range
Supply voltage	2.2–5.5 V - compatible with 3.3 V and 5 V automotive domains and low-voltage battery monitoring
Gain bandwidth	3 MHz - supports closed-loop bandwidth >1 MHz with moderate gain (e.g., G = 10)
Supply current	1 mA max at 5 V - allows integration into power-constrained modules like smart sensors
EMI rejection	85 dB at 2.4 GHz - mitigates RF interference from infotainment and cellular transceivers
Common-mode rejection	126 dB (typ) at 5 V - rejects noise on differential sensor bridges (e.g., strain gauges)

Pinout & Package

SOT23-5 package: 2.9 mm × 2.8 mm × 1.3 mm body, gull-wing leads, RoHS-compliant ECOPACK2.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN+)	Non-inverting input	Accepts rail-to-rail common-mode signals; low bias current (200 pA max) minimizes resistor-induced errors
2 (IN−)	Inverting input	Differential input node; EMI-hardened layout reduces RF rectification at 2.4 GHz
3 (V−)	Negative supply	Ground reference for single-supply operation; supports 0 V connection in 2.2–5.5 V systems
4 (OUT)	Output	Rail-to-rail swing (±70 mV saturation); drives 10 kΩ load with <0.1% settling in 600 ns
5 (V+)	Positive supply	Accepts 2.2–5.5 V; internal UVLO ensures clean startup above 2.2 V (t_init = 100 µs max)

Key Features

Feature	Design Value
AEC-Q100 Grade 0 qualification	Validated for −40 to +175 °C operation and automotive reliability (HTOL, TC, ESD)
Zero-drift auto-zero architecture	Eliminates need for system-level offset trimming in production calibration
Rail-to-rail I/O	Maximizes dynamic range in single-supply 3.3 V systems (e.g., exhaust gas oxygen sensors)
High CMRR & PSRR	126 dB CMRR / 123 dB SVR ensures immunity to power rail noise and ground bounce
Low 1/f noise	0.4 µV_PP (0.1–10 Hz) - critical for DC-coupled thermopile and pressure sensor amplification

Applications

Engine Control Unit (ECU) Sensor Interface

Battery Management System (BMS) Current Sensing

Use Scenario: Amplifying millivolt-level signals from knock sensors and manifold absolute pressure (MAP) transducers under high-temperature under-hood conditions.

IC Role / Device Role / Timing Role: Precision DC-coupled signal conditioner with <100 µV total offset error across temperature, driving SAR ADC inputs.

Use Value: Enables direct 16-bit digitization without software correction, reducing MCU computational load and calibration cost.

Use Scenario: High-side current sensing in 48 V mild-hybrid battery packs, where shunt voltage must be measured with µV-level resolution.

IC Role / Device Role / Timing Role: Low-drift, high-CMRR difference amplifier front-end with 126 dB rejection of common-mode bus transients.

Use Value: Achieves ±0.5% current measurement accuracy over lifetime, supporting ISO 26262 ASIL-B functional safety compliance.

Electric Power Steering (EPS) Torque Sensor

Automotive Cabin Pressure Monitoring

Use Scenario: Conditioning Wheatstone bridge outputs from magnetostrictive torque sensors exposed to mechanical vibration and thermal cycling.

IC Role / Device Role / Timing Role: Zero-drift instrumentation amplifier core with 0.26 µV/°C drift, rejecting bridge imbalance and thermal EMF.

Use Value: Maintains torque linearity <±0.1% FS across −40 to +150 °C, meeting EPS steering assist accuracy requirements.

Use Scenario: Low-power barometric pressure signal amplification in HVAC control modules, operating continuously at ambient cabin temperatures.

IC Role / Device Role / Timing Role: Micropower (1 mA), rail-to-rail op-amp interfacing piezoresistive pressure elements with 2.2 V supply headroom.

Use Value: Extends module battery life while delivering <1 Pa pressure resolution via 24-bit sigma-delta ADC interface.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX44268ASA+	Higher offset drift (0.5 µV/°C), lower GBP (1.5 MHz), same SOT23-5 package	Limited to ≤125 °C ambient; not AEC-Q100 qualified	Use only in non-safety-critical, lower-temperature industrial subsystems
AD8638ARJZ-R7	Lower supply current (1.2 µA typ), but narrower temp range (−40 to +125 °C) and no EMI hardening	Not rated for under-hood deployment; lacks 2.4 GHz EMIRR >80 dB	Select when ultra-low power dominates over RF immunity and extended temperature

Compared with MAX44268ASA+ and AD8638ARJZ-R7, TSZ181H1YLT uniquely combines AEC-Q100 Grade 0 qualification, 175 °C operation, 0.26 µV/°C drift, and 85 dB 2.4 GHz EMIRR - making it the only drop-in solution for safety-critical, high-EMI automotive sensor nodes.

Availability

TSZ181H1YLT is available at Aetrix Electronics and suitable for engine control units, battery management systems, electric power steering modules, and cabin pressure monitoring requiring stable component supply across automotive production lifecycles.

Supply support for TSZ181H1YLT 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 validation infrastructure.

The TSZ181H1 series belongs to ST's high-precision automotive op-amp product line, engineered specifically for zero-drift, high-temperature sensor signal conditioning in ASIL-B/C systems.

FAQ

What is the maximum junction temperature and thermal resistance for TSZ181H1YLT in SOT23-5?

The absolute maximum junction temperature is 180 °C. For the SOT23-5 package, the typical junction-to-ambient thermal resistance (R_thJA) is 250 °C/W. Derating is required above 70 °C ambient; at 175 °C case temperature and 1 mA supply current, power dissipation remains below 10 mW, ensuring safe operation within limits.

Does TSZ181H1YLT support true rail-to-rail input with input voltage beyond supply rails?

No. Rail-to-rail input means the common-mode range extends from (V₋ − 0.1 V) to (V₊ + 0.1 V). Input voltages must stay within −0.2 V to V_CC + 0.2 V per absolute maximum ratings. Exceeding these violates SOA and may cause phase reversal or latch-up.

How does the EMI rejection ratio (EMIRR) perform at 400 MHz and 1.8 GHz?

Per DS13624 Rev 2, EMIRR is 52 dB at 400 MHz and 1800 MHz, and 72 dB at 1800 MHz (note: 72 dB specified at 1800 MHz, 85 dB at 2400 MHz). Testing used RF injection on the IN− pin in MiniSO8; SOT23-5 performance is comparable due to identical die and bond-wire layout.

Can TSZ181H1YLT drive a 100 pF capacitive load without instability?

Yes. Phase margin is guaranteed ≥56° with 100 pF load and 10 kΩ resistance (RL = 10 kΩ, CL = 100 pF), per Table 4 and Figure 22–24. Output overshoot remains <5% in small-signal step response, confirming stability in typical PCB trace and filter capacitor configurations.

TSZ181H1YLT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: Chopper (Zero-Drift)

Number of Circuits:: 1

Output Type:: Single Ended, Rail-to-Rail

Slew Rate:: 4.7V/µs

Gain Bandwidth Product:: 3 MHz

-3db Bandwidth:: -

Current - Input Bias:: 30 pA

Voltage - Input Offset:: 1 µV

Current - Supply:: 800µA

Current - Output / Channel:: 29 mA

Voltage - Supply Span (Min):: 2.2 V

Voltage - Supply Span (Max):: 5.5 V

Operating Temperature:: -40°C ~ 175°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TSZ181H1YLT FAQ

1.How can I place an order for TSZ181H1YLT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSZ181H1YLT 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 TSZ181H1YLT reliable?

The price and inventory of TSZ181H1YLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSZ181H1YLT is usually 5 days.

3.What payment methods are accepted for TSZ181H1YLT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSZ181H1YLT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSZ181H1YLT?

TSZ181H1YLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSZ181H1YLT 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 TSZ181H1YLT?

For technical support, including TSZ181H1YLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSZ181H1YLT requirements.

6.How does Aetrix verify that TSZ181H1YLT is sourced from the original manufacturer or authorized distributors?

All TSZ181H1YLT 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 TSZ181H1YLT meets industry standards.

7.What is the process for return or replacement of TSZ181H1YLT?

All TSZ181H1YLT units undergo pre-shipment inspection (PSI). If there is an issue with TSZ181H1YLT, 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 TSZ181H1YLT part is unused and in its original packaging.

Return procedure for TSZ181H1YLT:

1.Submit a request within 90 days.

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

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