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

STMicroelectronics TS271CDT

Name: TS271CDT
Brand: STMicroelectronics
SKU: TS271CDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS271CDT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TS271CDT.pdf

Description:: IC OPAMP GP 1 CIRCUIT 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:7,102

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Product details

Overview

TS271CDT from STMicroelectronics is a CMOS programmable low-power single operational amplifier designed for single- or dual-supply operation, featuring externally adjustable I_SET (1.5 µA / 25 µA / 130 µA), rail-to-ground output swing, and offset null capability via external compensation. It delivers stable supply current and dynamic performance across 3–16 V supply range, with input bias current as low as 1 pA and input offset voltage down to 0.25 mV (TS271BC grade), making it suitable for precision sensor signal conditioning in battery-powered instrumentation.

For engineers reviewing the TS271CDT datasheet, TS271CDT pinout, TS271CDT application, or TS271CDT equivalent, key selection considerations include its programmable power-speed trade-off via I_SET, guaranteed offset nulling circuit compatibility, CMOS input stage advantages over JFET amplifiers (e.g., lower input current drift with temperature), and SO-8 package suitability for space-constrained analog front-ends.

Technical Context

The TS271 employs ST's silicon-gate CMOS process to achieve ultra-low input bias current (≤1 pA typ.) and minimal input current drift versus temperature-superior to JFET-input op-amps per Figures 8, 19, and 30. Its architecture supports three discrete I_SET configurations (1.5 µA, 25 µA, 130 µA) set by an external resistor between pins 4 and 8, enabling dynamic adjustment of supply current (10 µA to 1.4 mA), gain-bandwidth product (0.1 MHz to 2.3 MHz), and slew rate (0.04 V/µs to 4.5 V/µs).

It features dual offset null terminals (pins 1 and 5), allowing precise trimming of input offset voltage independent of supply rails. The output stage is specified to swing to ground (V_OL = 50 mV at I_L = 1 mA) and deliver ±30 mA short-circuit current, while maintaining stability with capacitive loads up to 100 pF across all I_SET settings per Figures 16, 27, and 38.

Key Specifications

Parameter	Value and Actual Design Meaning
I_SET Options	1.5 µA / 25 µA / 130 µA - sets quiescent current, bandwidth, and slew rate via external R_SET
Input Bias Current	1 pA (typ.) - enables high-impedance sensor interfacing without significant DC error
Input Offset Voltage	0.25 mV (TS271BC grade) - supports precision DC-coupled amplification with minimal initial error
Supply Voltage Range	3 V to 16 V - compatible with single-supply 3.3 V, 5 V, and 12 V systems
Output Swing	0 V to V_CC−1.5 V - rail-to-ground capability simplifies level-shifting in unipolar signal chains
Gain-Bandwidth Product	0.1 MHz (I_SET = 1.5 µA) to 2.3 MHz (I_SET = 130 µA) - scalable bandwidth for low-noise vs. speed optimization
Slew Rate	0.04 V/µs to 4.5 V/µs - matches signal dynamics from slow thermocouple outputs to faster transducer signals

Pinout & Package

TS271CDT is housed in an SO-8 (Small Outline-8) plastic micropackage per mechanical drawing 0016023/C, with 1.27 mm pitch, body dimensions 4.80–5.00 mm × 3.80–4.00 mm, and maximum height 1.75 mm.

Pin/Terminal	Circuit Role	Design Meaning
1	Offset Null 1	Connects to one end of external potentiometer for input offset voltage trimming
2	Inverting Input	High-impedance CMOS node for feedback network connection
3	Non-inverting Input	High-impedance CMOS node for reference or sensor signal input
4	V_CC−	Negative supply rail (ground in single-supply mode)
5	Offset Null 2	Connects to other end of external potentiometer; center wiper to V_CC+ or V_CC−
6	Output	Class-AB output stage capable of ±30 mA short-circuit current and rail-to-ground swing
7	V_CC+	Positive supply rail (3–16 V); powers internal CMOS circuitry and output stage
8	I_SET	Current-setting terminal; connects to external resistor to V_CC− to program operating point

Key Features

Feature	Design Value
Externally programmable I_SET	Three discrete current levels (1.5/25/130 µA) enable precise trade-off between power consumption and signal bandwidth
Rail-to-ground output	Output drives to 0 V (50 mV max drop at 1 mA load), eliminating need for negative supply in many sensor interfaces
Dual offset null terminals	Pins 1 and 5 support external trimming to reduce input offset voltage below datasheet limits
Ultra-low input bias current	1 pA typical ensures negligible loading on high-impedance sources like pH electrodes or photodiodes
Stable performance vs. supply variation	Supply current and dynamic parameters remain consistent across full 3–16 V V_CC+ range

Applications

Portable Gas Sensor Interface

Industrial Thermocouple Amplifier

Use Scenario: Amplifying microvolt-level outputs from electrochemical gas sensors in handheld air quality monitors powered by coin-cell batteries.

IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with rail-to-ground output and ultra-low input bias current to preserve sensor source impedance integrity.

Use Value: 1.5 µA I_SET mode draws only 10 µA supply current, extending battery life beyond 2 years while maintaining <1 mV offset error after nulling.

Use Scenario: Cold-junction compensation and linearization of K-type thermocouple signals in factory-floor temperature controllers.

IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end with programmable gain and offset correction.

Use Value: 25 µA I_SET setting provides 0.7 MHz GBW and 0.6 V/µs slew rate-sufficient for 10 Hz thermal response with <2 µV/°C offset drift.

Medical ECG Signal Conditioning

Automotive Battery Voltage Monitor

Use Scenario: First-stage amplification of millivolt-level biopotential signals in portable ECG devices, requiring high CMRR and minimal input current.

IC Role / Device Role / Timing Role: High-input-impedance, low-noise buffer with offset nulling to reject electrode half-cell potential variations.

Use Value: CMOS input stage achieves 1 pA bias current and 80 dB CMRR, reducing motion artifact coupling without active guarding.

Use Scenario: Monitoring 12 V lead-acid battery voltage in automotive telematics units, where supply rejection and long-term stability are critical.

IC Role / Device Role / Timing Role: Precision voltage follower with 80 dB supply voltage rejection ratio (SVR) to reject alternator ripple and load dump transients.

Use Value: 130 µA I_SET mode delivers 2.3 MHz GBW and 60–80 dB SVR across -40°C to +125°C, ensuring accuracy under engine bay thermal stress.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-power programmable op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC27L1CDR	Fixed 10 µA supply current; no I_SET programming; higher input offset voltage (2 mV max)	Lacks dynamic power-speed adjustment; less suitable for multi-mode battery-operated devices	Choose when fixed ultra-low power suffices and board space prohibits external R_SET
LMV721IDBVR	Fixed 120 µA supply current; rail-to-rail input/output; no offset null pins	Higher speed (1.5 MHz GBW) but no external offset trimming or I_SET flexibility	Prefer for higher-speed, rail-to-rail applications where offset nulling is handled digitally

Compared with TLC27L1CDR and LMV721IDBVR, TS271CDT uniquely combines programmable I_SET, dual offset null pins, and rail-to-ground output-enabling adaptive power management and analog trimming not available in fixed-current alternatives.

Availability

TS271CDT is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, automotive battery monitoring systems, and precision instrumentation requiring stable component supply across extended temperature ranges (-40°C to +125°C).

Supply support for TS271CDT 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 broad analog portfolio including precision op-amps and comparators.

The TS271 belongs to ST's legacy low-power CMOS op-amp family, designed specifically for cost-sensitive, battery-operated applications demanding ultra-low input current, programmable performance, and robust offset control.

FAQ

What is the purpose of the I_SET pin (pin 8) on the TS271CDT?

Pin 8 (I_SET) accepts an external resistor connected to V_CC− to program one of three quiescent current levels (1.5 µA, 25 µA, or 130 µA). This directly controls supply current, gain-bandwidth product, slew rate, and noise performance-enabling system-level optimization of power versus speed without changing the IC.

Can the TS271CDT operate from a single 3.3 V supply?

Yes. TS271CDT is fully specified from 3 V to 16 V single-supply operation. At 3.3 V, it maintains rail-to-ground output swing (V_OL ≤ 50 mV), 1 pA input bias current, and functional offset nulling-making it suitable for modern low-voltage IoT sensor nodes.

How do I connect the offset null circuit for the TS271CDT?

Connect a 25 kΩ potentiometer between pins 1 and 5; tie the wiper to V_CC+ (for positive offset correction) or V_CC− (for negative correction). Trim until output voltage equals mid-supply under zero-differential-input conditions-guaranteed for TS271AC/BC grades per Figure 3.

Is the TS271CDT pin-compatible with standard SO-8 op-amps like the LM358?

No. TS271CDT uses a non-standard pinout: pin 4 = V_CC−, pin 7 = V_CC+, pins 1/5 = offset null, and pin 8 = I_SET. It is not a drop-in replacement for LM358 (which has V_CC+ on pin 8 and no I_SET or offset null pins); PCB layout must follow TS271-specific routing.

TS271CDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 1

Output Type:: -

Slew Rate:: 0.04V/µs

Gain Bandwidth Product:: 100 kHz

-3db Bandwidth:: -

Current - Input Bias:: 1 pA

Voltage - Input Offset:: 1.1 mV

Current - Supply:: 10µA

Current - Output / Channel:: 45 mA

Voltage - Supply Span (Min):: 3 V

Voltage - Supply Span (Max):: 16 V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

TS271CDT FAQ

1.How can I place an order for TS271CDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS271CDT 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 TS271CDT reliable?

The price and inventory of TS271CDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS271CDT is usually 5 days.

3.What payment methods are accepted for TS271CDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS271CDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS271CDT?

TS271CDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS271CDT 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 TS271CDT?

For technical support, including TS271CDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS271CDT requirements.

6.How does Aetrix verify that TS271CDT is sourced from the original manufacturer or authorized distributors?

All TS271CDT 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 TS271CDT meets industry standards.

7.What is the process for return or replacement of TS271CDT?

All TS271CDT units undergo pre-shipment inspection (PSI). If there is an issue with TS271CDT, 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 TS271CDT part is unused and in its original packaging.

Return procedure for TS271CDT:

1.Submit a request within 90 days.

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

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