Texas Instruments TLC279CDBR

Overview

TLC279CDBR from Texas Instruments is a precision quad CMOS 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-bias-current signal conditioning in sensor front-ends and data acquisition systems.

For engineers reviewing the TLC279CDBR datasheet, TLC279CDBR pinout, TLC279CDBR application, or TLC279CDBR equivalent, this page provides verified electrical specifications, package mapping to SSOP-14, confirmed pin functions per TI SLOS092E, and two validated alternative op-amps with documented parameter and application differences.

Technical Context

The TLC279CDBR uses a polysilicon-gate CMOS process to achieve ultra-low input bias current (≤60 pA typ), minimal input offset voltage drift (0.3 µV/°C), and latch-up immunity. Its input stage supports common-mode voltage down to the negative rail, enabling true single-supply interfacing with ground-referenced sensors and ADC drivers.

It delivers 4.5 MHz unity-gain bandwidth and 0.5 V/µs slew rate at 5 V supply, with 60° phase margin ensuring stable operation in closed-loop configurations. The device maintains ≥65 dB CMRR and PSRR across 0°C–70°C, supporting precision amplification in noisy industrial environments.

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 TLC279CDBR, TLC279CDR offers identical performance in a larger SOIC package for easier hand-soldering, while TLV279IDR trades bandwidth and noise for 50% lower quiescent current - making it viable only in low-speed, power-constrained designs where 900 µV VIO is excessive.

Availability

TLC279CDBR is available at Aetrix Electronics and suitable for medical sensor signal conditioning, industrial data acquisition front-ends, and portable test & measurement equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLC279CDBR 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-amp design and manufacturing.

The TLC27xx family was engineered for cost-effective, high-accuracy signal conditioning in single-supply systems - targeting sensor interfaces, data acquisition, and industrial control where low VIO, low noise, and rail-to-rail operation are essential.

FAQ

What is the maximum input offset voltage specification for TLC279CDBR at 25°C?

The TLC279CDBR 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 applies under standard test conditions: VO = 1.4 V, RS = 50 Ω, VIC = 0 V, RL = 10 kΩ. At full temperature range (0°C to 70°C), the max VIO increases to 1500 µV. This precision grade distinguishes TLC279CDBR from lower-grade variants like TLC274C (10 mV max).

Does TLC279CDBR support true single-supply operation with ground-referenced inputs?

Yes, the TLC279CDBR supports true single-supply operation: its common-mode input voltage range extends to –0.1 V (below GND) at VDD = 5 V and 25°C, and its output swings fully to GND. This allows direct connection of ground-referenced sensors (e.g., thermocouples, bridge outputs) without level-shifting circuitry. The device is explicitly optimized for this use case, as confirmed in Section 6.1.1 of the SLOS092E datasheet.

What is the package type and footprint of TLC279CDBR?

The TLC279CDBR is packaged in a 14-pin SSOP (Shrink Small Outline Package), designated DB by Texas Instruments. Its nominal dimensions are 6.2 mm × 7.8 mm with 0.65 mm lead pitch. This surface-mount package is distinct from the SOIC-14 (D), PDIP-14 (N), and TSSOP-14 (PW) variants listed for the TLC279 family. The DB package enables higher board density than SOIC while maintaining compatibility with standard reflow processes.

Can TLC279CDBR drive capacitive loads without instability?

The TLC279CDBR exhibits 60° phase margin at unity gain with CL = 20 pF (Section 4.7), indicating stable operation into moderate capacitive loads. However, the datasheet does not guarantee stability for CL > 20 pF without external compensation. For driving ADC input capacitors or long traces, a series resistor (e.g., 10–100 Ω) between TLC279CDBR output and load is recommended to isolate capacitance and preserve phase margin - consistent with TI's application guidance in Section 6.1.2.

How does the input bias current of TLC279CDBR compare to bipolar op-amps, and why does it matter?

The TLC279CDBR features typical input bias current of ≤60 pA - over six orders of magnitude lower than typical bipolar op-amps (e.g., LM324: ~45 nA). This ultra-low bias current prevents voltage errors across high-value feedback or source impedances (e.g., >1 MΩ), making TLC279CDBR ideal for pH electrodes, photodiode transimpedance amps, and piezoelectric sensor interfaces where leakage would otherwise dominate signal accuracy.