Texas Instruments TLC279ID

Overview

TLC279ID 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 4 V to 16 V over –40°C to 85°C and delivers 4.5 MHz unity-gain bandwidth - enabling high-fidelity signal conditioning in low-voltage industrial sensor interfaces.

For engineers reviewing the TLC279ID datasheet, TLC279ID pinout, TLC279ID application, or TLC279ID equivalent, key selection criteria include its guaranteed 900 µV input offset voltage grade, low 60 pA typical input bias current, wide common-mode input range extending below ground, and SOIC-14 package compatibility with legacy BiFET upgrade paths.

Technical Context

The TLC279ID 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), making it suitable for high-impedance transducer amplification where leakage-induced errors must be minimized. Its input stage supports common-mode voltages down to –0.1 V (at VDD = 5 V) and up to VDD – 1.5 V across temperature.

Designed for single-supply systems, the device provides rail-to-rail output swing (e.g., 0–4.95 V at VDD = 5 V, 25°C) and maintains 65 dB minimum CMRR and PSRR across 0.1 Hz–10 MHz. It achieves 21 V/µs slew rate under large-signal conditions and exhibits latch-up immunity per JEDEC JESD78.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 6 mm body size, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA4188IDR and TLC27L9ID, the TLC279ID uniquely balances 900 µV precision, 4.5 MHz bandwidth, 4–16 V supply range, and –40°C to 85°C operation - making it the optimal choice for cost-sensitive industrial signal chains requiring proven reliability and broad design margin.

Availability

TLC279ID is available at Aetrix Electronics and suitable for industrial sensor interfaces, multi-channel data acquisition systems, and single-supply active filter designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLC279ID 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 to replace bipolar and BiFET op-amps in cost-sensitive, high-impedance applications - delivering CMOS advantages (low IB, low noise, rail-to-rail output) while maintaining robustness for industrial deployment.

FAQ

What is the maximum input offset voltage specification for TLC279ID at 25°C?

The TLC279ID has a maximum input offset voltage of 900 µV at 25°C, with a typical value of 120 µV. This guaranteed precision grade distinguishes it from lower-cost variants like the TLC274C (10 mV max) and makes the TLC279ID suitable for applications demanding high DC accuracy without trimming, such as calibrated sensor signal chains and reference buffer stages.

Does TLC279ID support true single-supply operation with inputs referenced to ground?

Yes, the TLC279ID supports true single-supply operation: its common-mode input voltage range extends to –0.1 V (below ground) at VDD = 5 V and 25°C, and its output swings down to 0 V. This allows direct connection of grounded sensors (e.g., thermocouples, bridge circuits) without level-shifting components - a core design feature confirmed in Section 4.2 and Figure 4-5 of the TLC279ID datasheet.

What is the unity-gain bandwidth and slew rate of TLC279ID?

The TLC279ID has a unity-gain bandwidth of 4.5 MHz and a slew rate of 21 V/µs under large-signal conditions (V_PP = 1 V). These values are measured at VDD = 5 V, 25°C, RL = 10 kΩ, and CL = 20 pF, enabling stable closed-loop operation up to ~100 kHz in active filter and buffer configurations without phase-margin degradation.

Can TLC279ID operate from a 3.3 V supply?

No - the TLC279ID requires a minimum supply voltage of 4 V over its full operating temperature range (–40°C to 85°C). While the C-suffix TLC279C supports 3 V at 0°C to 70°C, the I-suffix TLC279ID is rated for 4 V minimum. Using 3.3 V risks parametric noncompliance, especially in input common-mode range and output swing, and is outside the device's specified operating conditions.

Is TLC279ID pin-compatible with other TLC27xx quad op-amps in SOIC-14?

Yes, the TLC279ID shares identical pinout and SOIC-14 (D) package dimensions with TLC274ID, TLC274AID, and TLC274BID. All devices use the same 14-pin configuration shown in Figure 3-1 and Table 3-1 of the datasheet - enabling drop-in replacement for offset voltage grade upgrades without PCB layout changes, provided supply and thermal constraints are met.