Texas Instruments TLC271ACPS

Overview

TLC271ACPS from Texas Instruments is a programmable low-power LinCMOS™ operational amplifier with bias-select functionality, 5 mV max input offset voltage at 25°C, 3.6 V/µs slew rate in high-bias mode, and rail-to-rail output swing down to the negative rail-designed for precision transducer interfacing and battery-powered sensor signal conditioning.

For engineers reviewing the TLC271ACPS datasheet, TLC271ACPS pinout, TLC271ACPS application, or TLC271ACPS equivalent, this page delivers verified electrical specifications, bias-mode tradeoff analysis, package-validated terminal mapping, and real-world design context for single-supply analog front-end implementation.

Technical Context

The TLC271ACPS implements a silicon-gate LinCMOS™ process enabling 10¹² Ω input impedance and sub-picoampere bias currents while maintaining latch-up immunity and ESD protection up to 2000 V. Its three-programmable bias modes (high/medium/low) directly configure internal current sources to trade off slew rate (3.6–0.03 V/µs), noise (25–68 nV/√Hz), and power dissipation (3.4–0.05 mW) without changing external circuitry.

It supports single-supply operation from 3 V to 16 V across 0°C to 70°C, with common-mode input range extending 0.2 V below ground and output swing reaching GND. The device features two offset null pins (OFFSET N1/N2) for manual trimming and a dedicated BIAS SELECT terminal that accepts voltage levels (GND, midpoint, or VDD) to set operating mode.

Key Specifications

Pinout & Package

The TLC271ACPS is supplied in an 8-pin plastic DIP (P) package with through-hole mounting and standard 0.3-inch row spacing. Pin 1 is OFFSET N1, pin 5 is BIAS SELECT, and pin 8 is VDD - all terminals are validated per TI SLOS090D Rev. March 2001.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with TLC271CP and TLC272CP, the TLC271ACPS offers tighter initial offset for single-channel precision tasks, avoids inter-channel coupling present in dual variants, and maintains independent bias control per channel in multi-device layouts.

Availability

TLC271ACPS is available at Aetrix Electronics and suitable for transducer interfacing, battery-powered sensor nodes, active filter design, and analog computing blocks requiring stable component supply across industrial, medical, and test equipment programs.

Supply support for TLC271ACPS 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

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The TLC271 product line was engineered for cost-sensitive, low-power precision analog signal conditioning - targeting upgrade paths from bipolar op-amps while retaining CMOS input advantages and wide supply flexibility.

FAQ

What is the maximum supply voltage rating for the TLC271ACPS?

The absolute maximum supply voltage for the TLC271ACPS is 18 V, though recommended operation is limited to 3 V to 16 V across its 0°C to 70°C temperature range. Exceeding 16 V risks exceeding internal power dissipation limits, especially at elevated ambient temperatures or under heavy output loading conditions. Always observe derating curves in the TI SLOS090D datasheet for sustained operation.

How does the BIAS SELECT pin function on the TLC271ACPS?

The BIAS SELECT pin on the TLC271ACPS determines operating mode: grounding it selects high-bias mode (3.6 V/µs, 25 nV/√Hz), connecting to VDD/2 selects medium-bias (0.4 V/µs, 32 nV/√Hz), and tying to VDD selects low-bias (0.03 V/µs, 68 nV/√Hz). This pin draws only –1.4 µA at 25°C, enabling simple resistor-divider biasing in single-supply systems without significant current drain.

Can the TLC271ACPS operate from a single 3-V supply?

Yes, the TLC271ACPS is fully specified for single-supply operation down to 3 V at 0°C to 70°C. At 3 V, it maintains rail-to-rail output swing (to GND and within 1.2 V of VDD), common-mode input range from –0.2 V to 2.8 V, and functional bias-select operation - making it suitable for coin-cell and energy-harvesting applications where headroom is constrained.

What is the purpose of the OFFSET N1 and OFFSET N2 pins on the TLC271ACPS?

The OFFSET N1 and OFFSET N2 pins on the TLC271ACPS provide access to the internal input-stage nulling network, allowing manual trimming of input offset voltage using an external 10-kΩ potentiometer. Connecting the potentiometer wiper to OFFSET N1 and its ends to OFFSET N2 and VDD/GND enables reduction of initial VIO from 5 mV to <100 µV - essential for high-accuracy DC measurement circuits where auto-zeroing ICs are cost-prohibitive.

Does the TLC271ACPS support rail-to-rail input operation?

No, the TLC271ACPS does not support rail-to-rail input operation. Its common-mode input voltage range extends 0.2 V below the negative rail (GND in single-supply use) and up to 3.5 V below VDD at 5-V supply - e.g., –0.2 V to 3.5 V with VDD = 5 V. While this exceeds standard CMOS op-amps, it does not include the positive rail. Input signals must remain within this validated range to avoid phase reversal or increased distortion.