Texas Instruments TLC271BCDG4

Overview

TLC271BCDG4 from Texas Instruments is a programmable low-power LinCMOS™ operational amplifier with 2 mV max input offset voltage (25°C), bias-select mode for configurable power/performance tradeoffs, and rail-to-rail output swing down to the negative rail. It operates from 3 V to 16 V over 0°C to 70°C, features 10¹² Ω input impedance, and is used in precision sensor signal conditioning and battery-powered instrumentation.

For engineers reviewing the TLC271BCDG4 datasheet, TLC271BCDG4 pinout, TLC271BCDG4 application, or TLC271BCDG4 equivalent, key selection criteria include its programmable bias modes (high/medium/low), guaranteed 2 mV VIO grade, D-package SOIC-8 footprint, and single-supply operation with common-mode input extending below ground.

Technical Context

The TLC271BCDG4 implements a silicon-gate LinCMOS™ process enabling ultra-low input bias current (≤60 pA typ at 25°C) and exceptional offset voltage stability (0.1 µV/month drift). Its bias-select architecture uses an external voltage on the BIAS SELECT pin to configure internal current sources, directly controlling slew rate (3.6 V/µs high-bias), unity-gain bandwidth (1.7 MHz), and supply current (675–1600 µA).

This device supports true single-supply operation with a common-mode input range extending 0.2 V below VDD = 5 V (VICR = –0.2 V to 3.5 V), and delivers rail-to-rail output swing - VOH ≥ 3.2 V and VOL ≤ 50 mV at RL = 10 kΩ - making it suitable for interfacing with low-voltage ADCs and microcontrollers.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), surface-mount, 3.9 mm × 4.9 mm body, 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC271ACDG4, the TLC271BCDG4 provides tighter offset control (2 mV vs. 5 mV) for higher DC accuracy; versus TLV2462CDR, it offers wider supply range (3–16 V) and bias configurability but requires external bias-setting circuitry.

Availability

TLC271BCDG4 is available at Aetrix Electronics and suitable for precision sensor interfaces, battery-powered instrumentation, active filter design, and analog computing blocks requiring stable component supply across industrial temperature ranges.

Supply support for TLC271BCDG4 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 broad application support.

The TLC271 family belongs to TI's precision LinCMOS™ op-amp product line, designed specifically for low-power, high-input-impedance applications requiring stable DC performance and single-supply operability.

FAQ

What is the maximum input offset voltage specification for TLC271BCDG4 at 25°C?

The TLC271BCDG4 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 of the datasheet. This grade distinguishes it from the TLC271ACDG4 (5 mV) and standard TLC271CDG4 (10 mV) variants, making it suitable for applications demanding higher DC precision without external trimming.

How does the BIAS SELECT pin function on the TLC271BCDG4?

The BIAS SELECT pin (Pin 5) on the TLC271BCDG4 configures internal bias currents by accepting one of three voltage levels: GND (low bias), VDD/2 (medium bias), or VDD (high bias). This selection directly determines key ac parameters - e.g., slew rate changes from 0.03 V/µs (low) to 3.6 V/µs (high) - while adjusting supply current from 50 µW to 3.4 mW, enabling dynamic optimization for each application phase.

Does the TLC271BCDG4 support true single-supply operation with inputs below ground?

Yes, the TLC271BCDG4 supports true single-supply operation with its common-mode input voltage range extending to –0.2 V when VDD = 5 V (0°C to 70°C range), as verified in the recommended operating conditions table. This allows the IN+ and IN– pins to accept signals slightly below the GND rail - a critical capability for interfacing with AC-coupled or bipolar transducer outputs in unipolar supply systems.

What package type and RoHS status does the TLC271BCDG4 use?

The TLC271BCDG4 is supplied in an SOIC-8 (D) package - 3.9 mm × 4.9 mm body, 1.27 mm lead pitch - and is RoHS-compliant, as indicated by the "G4" suffix per TI's packaging nomenclature. The "G4" denotes lead-free terminations and green (halogen-free) molding compound, meeting JEDEC J-STD-020 moisture sensitivity level 3 requirements.

Can the TLC271BCDG4 drive capacitive loads without instability?

The TLC271BCDG4 exhibits a phase margin of 46° at unity gain with CL = 20 pF (VDD = 5 V, TA = 25°C), as documented in the operating characteristics tables. While stable with moderate capacitance, driving >100 pF loads may require isolation resistance or feedback compensation. TI's application notes recommend adding a 10–100 Ω series resistor between the output and capacitive load to maintain stability in high-C applications.