Texas Instruments TLC279CDBRG4

Overview

TLC279CDBRG4 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 the negative rail. It operates from 3 V to 16 V over 0°C to 70°C and delivers high input impedance (>10¹² Ω) for low-level sensor signal conditioning in industrial instrumentation.

For engineers reviewing the TLC279CDBRG4 datasheet, TLC279CDBRG4 pinout, TLC279CDBRG4 application, or TLC279CDBRG4 equivalent, key selection criteria include guaranteed 900 µV max VIO at 25°C, CMOS input stage enabling ultra-low bias current (≤60 pA), and validated performance in single-supply transducer interfaces with ground-referenced inputs.

Technical Context

The TLC279CDBRG4 implements a polysilicon-gate CMOS input stage that enables sub-1 pA typical input bias current and exceptional input offset voltage drift (0.3 µV/°C from 25°C to 70°C). Its architecture supports common-mode input voltage extending below the negative rail - critical for ground-sensed signals in single-supply systems.

It delivers 4.5 MHz unity-gain bandwidth and 0.5 V/µs slew rate under 5 V supply, with CMRR and PSRR exceeding 65 dB across temperature. The device is latch-up immune and includes on-chip ESD protection, making it suitable for ruggedized analog front-ends where reliability and long-term stability are mandatory.

Key Specifications

Pinout & Package

Package: SSOP-14 (DB), 6.2 mm × 7.8 mm body, 0.65 mm pitch, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC279CDR, the TLC279CDBRG4 offers 25% smaller PCB area and improved thermal dissipation in SSOP; versus OPA4277UA, it enables true single-supply ground-referenced operation at the cost of slightly higher voltage noise and lower bandwidth.

Availability

TLC279CDBRG4 is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical front-ends, and automotive cabin monitoring systems requiring stable component supply, long-lifecycle support, and guaranteed parametric compliance across temperature.

Supply support for TLC279CDBRG4 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 and embedded processing technologies, with decades of expertise in precision op-amps and industrial-grade signal chain solutions.

The TLC27xx family was designed specifically for cost-sensitive, high-stability analog signal conditioning in single-supply systems - targeting instrumentation, process control, and sensor interface applications where low drift and rail-to-rail operation are essential.

FAQ

What is the maximum input offset voltage specification for TLC279CDBRG4 at 25°C?

The TLC279CDBRG4 has a maximum input offset voltage of 900 µV at 25°C, as specified in the Electrical Characteristics table (Section 4.3) of the TI SLOS092E datasheet. This value is guaranteed across production lots and forms the basis for its classification as the highest-precision grade in the TLC27xx series. The TLC279CDBRG4 maintains this specification under recommended operating conditions of VDD = 5 V or 10 V and RL = 10 kΩ.

Does TLC279CDBRG4 support true single-supply operation with ground-referenced inputs?

Yes, the TLC279CDBRG4 supports true single-supply operation with ground-referenced inputs: its common-mode input voltage range extends to –0.1 V below GND at 5 V supply (and –0.1 V to 3.5 V full range), and its output swings fully to GND. This capability is enabled by its CMOS input stage and is explicitly validated in Section 6.1.1 of the datasheet for applications like sensor signal conditioning where the signal source is referenced to system ground.

What package type and dimensions does TLC279CDBRG4 use?

The TLC279CDBRG4 uses the SSOP-14 (DB) package: 6.2 mm × 7.8 mm body size with 0.65 mm lead pitch, per TI's Mechanical, Packaging, and Orderable Information (Section 9). This surface-mount package is tape-and-reel compatible (G4 suffix), RoHS-compliant, and optimized for automated assembly in space-constrained industrial and medical PCBs.

How does the input bias current of TLC279CDBRG4 compare to bipolar op-amps in sensor applications?

The TLC279CDBRG4 exhibits typical input bias current of 10–60 pA - over 100× lower than typical bipolar op-amps (e.g., LM324: ~45 nA). This enables use of high-value resistive networks (e.g., 1–10 MΩ) in sensor bridges and voltage dividers without introducing measurable DC error, a critical advantage in thermistor, RTD, or piezoresistive sensor interfaces where leakage currents would otherwise dominate measurement accuracy.

Is TLC279CDBRG4 suitable for use in medical devices requiring long-term DC stability?

Yes, the TLC279CDBRG4 is suitable for medical devices requiring long-term DC stability: its input offset voltage drift is specified at 0.3 µV/°C (25°C to 70°C), and TI calculates long-term drift at ≤0.1 µV/month. Combined with CMOS input stability and latch-up immunity, these characteristics support reliable performance in FDA-cleared ECG front-ends and portable diagnostic equipment where calibration intervals exceed 6 months.