Texas Instruments TLC279CDG4

Overview

TLC279CDG4 from Texas Instruments is a precision quad operational amplifier optimized for single-supply operation, featuring 900 µV max input offset voltage (25°C), 10.8 nV/√Hz input voltage noise at 1 kHz, and rail-to-rail output swing down to GND. It operates from 3 V to 16 V over 0°C–70°C and delivers high input impedance (>10¹² Ω) for low-bias-current sensor signal conditioning in industrial instrumentation.

For engineers reviewing the TLC279CDG4 datasheet, TLC279CDG4 pinout, TLC279CDG4 application, or TLC279CDG4 equivalent, key selection considerations include its guaranteed 900 µV offset (C-suffix grade), extended common-mode range below GND, low-noise performance in high-impedance transducer interfaces, and SOIC-14 packaging compatible with automated PCB assembly.

Technical Context

The TLC279CDG4 uses a polysilicon-gate CMOS process to achieve ultra-low input bias current (≤60 pA typ) and stable offset voltage drift (0.3 µV/°C), enabling precision DC-coupled amplification without significant thermal error accumulation. Its input stage supports common-mode voltages down to –0.1 V (at VDD = 5 V), and output can swing to within 50 mV of GND under load.

This device targets applications requiring four independent precision gain stages in one package-such as multi-channel data acquisition front-ends-where low power (6.4 mA max supply current at 25°C), wide supply range (3–16 V), and ESD-protected inputs support robust operation in mixed-signal industrial environments.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 6 mm body, surface-mount, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC279IDR and OPA4277UA, the TLC279CDG4 offers the best balance of low-cost precision, true single-supply capability, and industrial-grade temperature margin-making it optimal for cost-sensitive, space-constrained, and ground-referenced sensor systems.

Availability

TLC279CDG4 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, multi-channel data acquisition front-ends, and low-power battery-operated sensor nodes requiring stable component supply and long-term manufacturing continuity.

Supply support for TLC279CDG4 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs for industrial, automotive, and consumer applications.

The TLC27xx family was designed to deliver BiFET-level precision and speed in CMOS technology-targeting cost-sensitive, single-supply, high-impedance sensor interfaces where low power, rail-to-rail output, and robustness are essential.

FAQ

What is the maximum input offset voltage specification for TLC279CDG4 at room temperature?

The TLC279CDG4 has a maximum input offset voltage of 900 µV at 25°C, as specified in the Electrical Characteristics table for the C-suffix grade. This value applies under standard test conditions (VO = 1.4 V, RS = 50 Ω, VIC = 0 V, RL = 10 kΩ) and defines the worst-case DC error introduced by the amplifier in unity-gain configurations without trimming. The typical value is 120 µV.

Does TLC279CDG4 support true single-supply operation with input signals referenced to ground?

Yes, the TLC279CDG4 supports true single-supply operation with ground-referenced inputs. Its common-mode input voltage range extends to –0.1 V (at VDD = 5 V), allowing direct connection of sensors whose outputs swing to GND. Combined with output swing to GND, this enables full-scale signal handling in 3 V–16 V single-rail systems without level-shifting circuitry.

What is the supply current consumption of TLC279CDG4 across temperature and supply voltage?

The TLC279CDG4 draws up to 6.4 mA total supply current (all four amplifiers) at 25°C and VDD = 5 V. At 0°C it rises to 7.2 mA, and at 70°C it is 5.2 mA. With VDD = 10 V, max IDD is 8 mA at 25°C. These values reflect quiescent current only-output loading increases total consumption proportionally to load current.

Can unused amplifiers in the TLC279CDG4 be left unconnected?

No-unused amplifiers in the TLC279CDG4 must not be left floating. Per TI's application guidance, each unused op-amp should be configured as a grounded unity-gain follower (noninverting input tied to GND, output connected to inverting input). This prevents oscillation, minimizes supply current variation, and avoids unpredictable output states that could couple noise into adjacent channels.

Is TLC279CDG4 pin-compatible with other members of the TLC27xx family?

Yes, the TLC279CDG4 is pin-compatible with all TLC27xx quad op-amps in SOIC-14 (D) package-including TLC274CDR, TLC274ACDR, and TLC274BCDR-as confirmed by the Pin Configuration and Functions section and mechanical packaging data. All share identical 14-pin SOIC layout, pin numbering, and terminal functions, enabling drop-in replacement within the same grade and package variant.