Texas Instruments TLC271BID

Overview

TLC271BID from Texas Instruments is a programmable low-power LinCMOS™ operational amplifier with 2 mV max input offset voltage, bias-select mode (high/medium/low), and operation from 4 V to 16 V over –40°C to 85°C. It features rail-to-rail output swing, common-mode input range extending below the negative rail, and 10¹² Ω input impedance - used in precision sensor signal conditioning and battery-powered instrumentation.

For engineers reviewing the TLC271BID datasheet, TLC271BID pinout, TLC271BID application, or TLC271BID equivalent, key selection criteria include its programmable bias modes for tradeoffs between slew rate (3.6 V/µs high-bias), noise (25 nV/√Hz), power (50–3375 µW), and input offset drift (0.1 µV/month), especially in single-supply industrial analog front-ends.

Technical Context

The TLC271BID implements a silicon-gate LinCMOS™ process enabling stable offset voltage and ultra-low input bias current (0.6 pA typ at 25°C). Its bias-select pin allows dynamic configuration of three internal operating points, directly altering slew rate, unity-gain bandwidth (1.7 MHz high-bias), noise density, and supply current without external component changes.

This architecture supports wide supply flexibility (4–16 V) and true single-supply operation with VICR extending to –0.2 V (at VDD = 5 V), while maintaining high CMRR (65–85 dB) and PSRR (65–96 dB) across temperature - critical for transducer interfacing where ground-referenced signals dominate.

Key Specifications

Pinout & Package

The TLC271BID is housed in an 8-pin plastic DIP (P package) with through-hole mounting and standard 0.3-inch row spacing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC271ACD and TLV271IDR, the TLC271BID uniquely delivers the tightest factory-trimmed offset (2 mV) combined with runtime-configurable bias modes - making it optimal for industrial analog signal chains demanding both precision and adaptive power management.

Availability

TLC271BID is available at Aetrix Electronics and suitable for industrial temperature transmitters, portable pH meters, strain gauge interfaces, and remote battery-powered data loggers requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TLC271BID 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 specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in precision analog ICs.

The TLC271 family was engineered as programmable LinCMOS™ op-amps targeting industrial sensor signal conditioning, transducer interfacing, and battery-operated instrumentation where offset stability, ultra-low bias current, and supply flexibility are critical.

FAQ

What is the maximum input offset voltage specification for the TLC271BID at 25°C?

The TLC271BID has a maximum input offset voltage of 2 mV at 25°C, as specified in the "AVAILABLE OPTIONS" table and confirmed in the high-bias mode electrical characteristics section for I-suffix devices. This value applies across the full operating temperature range of –40°C to +85°C, with a worst-case limit of 3.5 mV. The 2 mV grade distinguishes the TLC271BID from the 5 mV TLC271AID and 10 mV TLC271ID variants.

How does the BIAS SELECT pin function on the TLC271BID?

The BIAS SELECT pin on the TLC271BID configures one of three internal bias levels: connecting to GND selects high-bias mode (3.6 V/µs slew rate, 3375 µW), to VDD/2 selects medium-bias (0.4 V/µs, 525 µW), and to VDD selects low-bias (0.03 V/µs, 50 µW). This pin enables real-time tradeoffs between speed, noise, and power without modifying external circuitry - a core differentiator of the TLC271BID versus fixed-bias op-amps.

What package type and pin count does the TLC271BID use?

The TLC271BID uses an 8-pin plastic dual in-line package (PDIP or P package), as indicated by the "P" suffix in the part number and confirmed in the "AVAILABLE OPTIONS" table. It shares the same DIP-8 pinout and mechanical dimensions as industry-standard 0.3-inch row-spacing through-hole op-amps, enabling drop-in replacement in legacy designs using sockets or wave-soldered assemblies.

Does the TLC271BID support true single-supply operation with input signals below ground?

Yes, the TLC271BID supports true single-supply operation with its common-mode input voltage range extending to –0.2 V below GND when VDD = 5 V, as documented in the recommended operating conditions table. This allows direct interfacing with ground-referenced sensors (e.g., grounded thermocouples or 2-wire RTDs) without level-shifting circuitry - a key advantage over many bipolar-input op-amps that require dual supplies for sub-ground signal handling.

What is the typical input bias current of the TLC271BID at 25°C?

The typical input bias current of the TLC271BID is 0.6 pA at 25°C, as specified in the high-bias mode electrical characteristics table for I-suffix devices. This ultra-low value - enabled by Texas Instruments' LinCMOS™ silicon-gate process - ensures minimal loading on high-impedance sources such as pH electrodes, photodiodes, or capacitive sensors, preserving signal integrity in precision analog front-ends.