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

STMicroelectronics TSZ181IYLT

Name: TSZ181IYLT
Brand: STMicroelectronics
SKU: TSZ181IYLT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSZ181IYLT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: SC-74A, SOT-753

Datasheet:: TSZ181IYLT.pdf

Description:: IC OPAMP ZER-DRIFT 1CIRC SOT23-5

Quantity:: RFQ Add To RFQ list

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Inventory:2,869

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Product details

Overview

TSZ181IYLT from STMicroelectronics is a single-channel, chopper-stabilized precision operational amplifier designed for high-accuracy sensor signal conditioning in automotive and medical systems. It delivers 25 µV max input offset voltage at 25 °C, 35 µV over –40 to 125 °C, rail-to-rail I/O, 3 MHz gain bandwidth, and 1 mA supply current at 5 V.

For engineers reviewing the TSZ181IYLT datasheet, TSZ181IYLT pinout, TSZ181IYLT application, or TSZ181IYLT equivalent, this device is selected for ultra-low-drift analog front-ends where calibration-free accuracy, EMI robustness (72 dB @ 1.8 GHz), and extended temperature operation are mandatory.

Technical Context

The TSZ181IYLT employs a 2.4 MHz chopper architecture that continuously corrects input offset and cancels 1/f noise in both time and frequency domains-modulating the input signal to suppress low-frequency errors before demodulation and low-pass filtering. Its CMOS input stage achieves 30 pA typical input bias current and 0.1 µV/°C max offset drift.

It operates from 2.2 V to 5.5 V with rail-to-rail input common-mode range (V_CC– − 0.1 V to V_CC+ + 0.1 V) and output swing within 40 mV of rails under 10 kΩ load. EMI rejection ratio reaches 85 dB at 2.4 GHz, and it maintains ≥56° phase margin driving 100 pF loads without external isolation resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Input offset voltage	25 µV max at 25 °C; enables <0.01% error in 2.5 V full-scale current sensing without trimming
Offset drift	0.1 µV/°C max; ensures <1.25 µV total drift across –40 to 125 °C ambient
Gain bandwidth product	3 MHz at 5 V; supports stable closed-loop gain ≥10 up to 300 kHz with 0.1% settling
Supply current	1 mA max per channel at 5 V; allows battery-powered 12-bit+ data acquisition with <5 mW total dissipation
EMI rejection ratio	85 dB at 2.4 GHz; prevents RF-induced output perturbation in infotainment or ADAS sensor nodes
Common-mode rejection	126 dB typ at 5 V; rejects >99.9997% of power-supply ripple in shunt-based current measurement
Input bias current	200 pA max at 25 °C; avoids >2 mV error across 10 MΩ source impedance in thermistor interfaces

Pinout & Package

TSZ181IYLT is supplied in SOT23-5 package (5-pin, 2.9 × 1.6 mm, 0.95 mm height), with exposed pad electrically unconnected. Pin 1 = Non-inverting input (+IN), Pin 2 = Inverting input (–IN), Pin 3 = V_CC– (GND), Pin 4 = Output (OUT), Pin 5 = V_CC+ (VDD).

Pin/Terminal	Circuit Role	Design Meaning
1	Non-inverting input	High-impedance CMOS node; accepts signals from 0.1 V below GND to 0.1 V above VDD
2	Inverting input	Differential pair input; matched to Pin 1 for <1 µV input offset contribution
3	V_CC– (Ground)	Reference return path; must be low-impedance to minimize ground bounce in high-speed settling
4	Output	Rail-to-rail capable; drives 10 kΩ load to within 40 mV of VDD/GND; slew rate 4.7 V/µs
5	V_CC+ (Supply)	Positive supply rail; accepts 2.2–5.5 V; PSRR 123 dB ensures immunity to digital supply noise

Key Features

Feature	Design Value
Chopper-stabilized architecture	2.4 MHz internal clock eliminates 1/f noise and reduces offset drift to 0.1 µV/°C
Rail-to-rail input/output	Full dynamic range utilization: IN common-mode extends 0.1 V beyond rails; OUT swings to 40 mV of rails
Automotive-grade qualification	AEC-Q100 Grade 1 (–40 to 125 °C) with 150 °C junction rating and 200 mA latch-up immunity
High EMI immunity	85 dB rejection at 2.4 GHz enables reliable operation near Bluetooth/Wi-Fi antennas in vehicle ECUs
Low-noise performance	37 nV/√Hz input voltage noise at 1 kHz and 0.4 µV_PP (0.1–10 Hz); critical for µV-level sensor amplification

Applications

Automotive Battery Monitoring

Medical ECG Front-End

Use Scenario: Precision shunt-based current measurement in 12 V/48 V hybrid vehicle battery management systems.

IC Role / Device Role / Timing Role: Primary gain-stage amplifier in bidirectional current-sense circuit with 50× fixed gain and 3 MHz bandwidth.

Use Value: 25 µV offset enables ±10 A measurement accuracy to ±0.5% without factory calibration; 125 °C operation sustains reliability under hood.

Use Scenario: Low-noise, DC-coupled amplification of 0.5–5 mV differential ECG signals in portable patient monitors.

IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with rail-to-rail input enabling direct connection to electrode leads.

Use Value: 0.1 µV/°C drift prevents baseline wander during 37 °C → 42 °C fever monitoring; 37 nV/√Hz noise preserves diagnostic SNR.

Industrial Pressure Transducer Signal Chain

High-Accuracy Thermocouple Amplifier

Use Scenario: Amplifying mV-level Wheatstone bridge outputs from MEMS pressure sensors in HVAC and process control.

IC Role / Device Role / Timing Role: Precision gain block with 100× non-inverting configuration and 3 MHz GBP for fast step response.

Use Value: 35 µV max offset over temperature eliminates need for thermal compensation circuits; 126 dB CMRR rejects bridge excitation ripple.

Use Scenario: Cold-junction compensation and linearization amplifier for Type-K thermocouples in industrial ovens.

IC Role / Device Role / Timing Role: High-input-impedance, low-drift buffer feeding ADC reference and cold-junction sensor.

Use Value: 200 pA max input bias current avoids >10 µV error across 100 kΩ thermocouple lead resistance; 123 dB SVR rejects heater switching noise.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSZ121ILT	Lower bandwidth (400 kHz), lower supply current (40 µA), same 25 µV offset but higher 0.3 µV/°C drift	Better suited for ultra-low-power, sub-100 kHz sensor interfaces where drift tolerance >0.1 µV/°C is acceptable	Select TSZ121ILT only when power budget <100 µA dominates over bandwidth and drift requirements
TSV711ICT	Same 25 µV offset and 3 MHz GBP, but no chopper architecture-higher 1/f noise (65 nV/√Hz) and 0.5 µV/°C drift	Acceptable for non-critical industrial signal chains where EMI immunity and long-term stability are secondary	Choose TSV711ICT only if cost sensitivity outweighs need for automotive-grade drift/EMI performance

Compared with TSZ121ILT and TSV711ICT, TSZ181IYLT uniquely combines 3 MHz bandwidth, 0.1 µV/°C drift, and 85 dB EMI rejection-making it the sole option for calibrated-free, high-bandwidth, high-temperature automotive sensor front-ends.

Availability

TSZ181IYLT is available at Aetrix Electronics and suitable for automotive battery monitoring, medical ECG front-ends, and industrial pressure transducer signal chains requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSZ181IYLT 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

TSZ181IYLT belongs to ST's TSZx precision op-amp family, engineered specifically for zero-drift, high-EMI-immunity analog signal conditioning in safety-critical automotive and medical applications.

FAQ

What is the maximum capacitive load the TSZ181IYLT can drive without external compensation?

The TSZ181IYLT remains stable with up to 100 pF capacitive load in unity-gain configuration without added series resistance. For loads exceeding 100 pF-such as ADC input capacitance or long PCB traces-a 10–47 Ω isolation resistor is recommended to maintain ≥56° phase margin and prevent overshoot, as verified in Figure 51–53 of DS11863.

Does TSZ181IYLT require external filtering to suppress chopper ripple?

No external filtering is required for most applications. The internal low-pass filter suppresses chopper ripple to <1 µV_PP at the output. Only in ultra-high-precision DC applications (e.g., <1 ppm accuracy) should a simple RC network (e.g., 10 kΩ + 10 nF) be added post-amplifier to attenuate residual 2.4 MHz artifacts by >40 dB.

Can TSZ181IYLT operate with a single 2.2 V supply and still achieve rail-to-rail output?

Yes. At V_CC+ = 2.2 V and V_CC– = 0 V, TSZ181IYLT delivers rail-to-rail output swing-reaching within 40 mV of both rails under 10 kΩ load-while maintaining 1.6 MHz GBP and 2.5 V/µs slew rate. Input common-mode range extends from –0.1 V to +2.3 V, supporting true single-supply sensor interfacing.

How does the ESD protection on TSZ181IYLT inputs affect overvoltage tolerance?

The internal ESD diodes clamp input voltages to V_CC+ + 0.5 V and V_CC– – 0.5 V. Exceeding these limits risks forward-conducting the diodes and damaging the input stage. To protect against transient overvoltage, limit input current to ≤10 mA using series resistors-e.g., 1 kΩ for ±1 V transients-as shown in Figure 50 of DS11863.

TSZ181IYLT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: Zero-Drift

Number of Circuits:: 1

Output Type:: Rail-to-Rail

Slew Rate:: 4.7V/µs

Gain Bandwidth Product:: 3 MHz

-3db Bandwidth:: -

Current - Input Bias:: 30 pA

Voltage - Input Offset:: 25 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 ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TSZ181IYLT FAQ

1.How can I place an order for TSZ181IYLT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSZ181IYLT 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 TSZ181IYLT reliable?

The price and inventory of TSZ181IYLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSZ181IYLT is usually 5 days.

3.What payment methods are accepted for TSZ181IYLT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSZ181IYLT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSZ181IYLT?

TSZ181IYLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSZ181IYLT 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 TSZ181IYLT?

For technical support, including TSZ181IYLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSZ181IYLT requirements.

6.How does Aetrix verify that TSZ181IYLT is sourced from the original manufacturer or authorized distributors?

All TSZ181IYLT 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 TSZ181IYLT meets industry standards.

7.What is the process for return or replacement of TSZ181IYLT?

All TSZ181IYLT units undergo pre-shipment inspection (PSI). If there is an issue with TSZ181IYLT, 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 TSZ181IYLT part is unused and in its original packaging.

Return procedure for TSZ181IYLT:

1.Submit a request within 90 days.

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

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