Texas Instruments TLC279IDR

Overview

TLC279IDR 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 TLC279IDR datasheet, TLC279IDR pinout, TLC279IDR application, or TLC279IDR equivalent, this page provides verified package mapping (SOIC-14), confirmed pin functions per TI SLOS092E, real-world supply-range constraints, noise-performance context for low-impedance vs high-impedance source matching, and two validated alternative quad op-amps with documented offset and temperature-range trade-offs.

Technical Context

The TLC279IDR uses a polysilicon-gate CMOS process to achieve ultra-low input bias current (<60 pA typ at 25°C) and stable offset voltage drift (0.3 µV/°C from 25°C to 85°C), making it suitable for high-impedance transducer amplification where leakage-induced errors must be minimized. Its input common-mode range extends to –0.1 V below ground (at VDD = 5 V), supporting true single-supply DC-coupled configurations without level-shifting circuitry.

Designed for stability with capacitive loads up to 20 pF, the device exhibits 60° phase margin at unity gain and supports closed-loop gains from 1 to 1000. The 0.5 V/µs slew rate and 21 V/µs large-signal response enable moderate-speed precision applications such as active filtering and analog front-end buffering - without requiring external compensation in standard gain configurations.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 6.00 mm body size, surface-mount, tape-and-reel compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC279CDR, the TLC279IDR offers tighter offset and extended temperature range at identical SOIC-14 footprint; compared with OPA2188AIDR, it trades zero-drift performance for lower power, higher bandwidth, and proven robustness in high-impedance sensor interfaces.

Availability

TLC279IDR is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, medical instrumentation front-ends, and automotive cabin environment monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC279IDR 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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of op-amp design heritage.

The TLC27xx family was developed to deliver BiFET-level precision and speed in CMOS technology - targeting cost-sensitive, high-impedance, single-supply applications in industrial, medical, and test equipment where low power and rail-to-rail operation are essential.

FAQ

What is the maximum input common-mode voltage for TLC279IDR at 12 V supply?

At VDD = 12 V and TA = 25°C, the TLC279IDR common-mode input voltage range is specified as –0.1 V to 10.5 V (VDD – 1.5 V). This upper limit decreases to VDD – 1.5 V across the full –40°C to +85°C range. Exceeding this range risks input stage saturation or increased offset error - verify operation with worst-case common-mode conditions in your schematic simulation.

Does TLC279IDR support true rail-to-rail input operation?

No - the TLC279IDR does not support rail-to-rail input. Its common-mode input range extends to –0.1 V below ground but only to VDD – 1.5 V at temperatures outside 25°C. For example, at VDD = 5 V and 85°C, the usable input range is –0.1 V to 3.5 V. True rail-to-rail input requires devices like the TLV9064 or OPA333, not the TLC279IDR.

Can TLC279IDR drive a 1000 pF capacitive load stably?

No - the TLC279IDR is characterized for stability with ≤20 pF capacitive loads at unity gain. Driving 1000 pF directly will cause severe peaking or oscillation. To interface with heavy capacitive loads (e.g., long cables or ADC input capacitance), add an isolation resistor (≥500 Ω) between TLC279IDR output and the load, or use a dedicated buffer stage with higher drive capability.

What is the recommended bypassing scheme for TLC279IDR?

Place a 0.1 µF X7R ceramic capacitor between VDD and GND, located ≤2 mm from the TLC279IDR SOIC-14 pins. For noisy environments or mixed-signal boards, add a second 4.7 µF tantalum or polymer capacitor in parallel. Avoid series inductance - use short, wide traces and solid ground planes. Do not omit bypassing: instability or increased noise may occur without it.

How should unused amplifiers in the TLC279IDR be configured?

Unused amplifiers in the TLC279IDR must be configured as unity-gain voltage followers with inputs tied together and connected to a stable DC voltage within the common-mode range (e.g., VDD/2 via resistor divider). Leaving inputs floating or unconnected risks oscillation, increased supply current, or erratic behavior - verified in TI SLOS092E Section 6.1.2.