Texas Instruments TLC279CD

Overview

TLC279CD 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–70°C and delivers high input impedance (>10¹² Ω) for low-level sensor signal conditioning in industrial instrumentation.

For engineers reviewing the TLC279CD datasheet, TLC279CD pinout, TLC279CD application, or TLC279CD equivalent, key selection criteria include its guaranteed 900 µV offset voltage grade, extended common-mode input range below ground, low-noise performance in high-impedance transducer interfaces, and SOIC-14 packaging compatible with automated assembly.

Technical Context

The TLC279CD uses a polysilicon-gate CMOS process to achieve ultra-low input bias current (≤60 pA typ), minimal offset voltage drift (0.3 µV/°C), and latch-up immunity-enabling stable DC-coupled amplification without external protection circuitry. Its input stage supports common-mode voltages down to –0.1 V (at VDD = 5 V), while the output stage drives to within 50 mV of GND under load.

Designed specifically for single-supply systems, the device avoids split-supply complexity by integrating rail-sensing input architecture and boosted slew rate (0.5 V/µs) for moderate-bandwidth applications like active filters and precision comparators-without requiring level-shifting networks or dual supplies.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 6.00 mm body, standard JEDEC MS-012AC footprint with 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA4188IDR and LM324DR, the TLC279CD uniquely balances ultra-low offset (900 µV), CMOS input performance (<60 pA bias), and SOIC-14 compatibility at mid-tier cost-making it optimal for 14–16-bit data acquisition where zero-drift isn't mandatory but bipolar alternatives introduce unacceptable noise or headroom loss.

Availability

TLC279CD is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical front-ends, and single-supply active filters requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant SOIC packaging.

Supply support for TLC279CD 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 heritage in precision op-amp design and manufacturing.

The TLC27xx family was engineered for high-accuracy, low-power linear signal conditioning in single-supply systems-targeting industrial automation, test equipment, and portable instrumentation where CMOS input advantages outweigh zero-drift complexity.

FAQ

What is the maximum input offset voltage specification for the TLC279CD at 25°C?

The TLC279CD has a maximum input offset voltage of 900 µV at 25°C, as specified in the Electrical Characteristics table under VIO for TLC279C devices. This value is guaranteed across production lots and forms the basis for its classification as the highest-precision grade in the TLC27xx series. The TLC279CD maintains this spec within its 0°C to 70°C operating range, with full-range max at 1500 µV.

Does the TLC279CD support true single-supply operation with inputs extending below ground?

Yes, the TLC279CD supports true single-supply operation with its common-mode input voltage range extending to –0.1 V below GND at VDD = 5 V (and –0.3 V at VDD = 10 V). This capability allows direct connection of ground-referenced sensors without level-shifting circuitry. The device achieves this via its CMOS input stage design, which is explicitly optimized for single-supply use cases as confirmed in Section 6.1.1 of the datasheet.

What is the typical input voltage noise density of the TLC279CD and at what frequency is it measured?

The TLC279CD has a typical input voltage noise density of 10.8 nV/√Hz, measured at f = 1 kHz with RS = 20 Ω, as stated in Section 4.7 (Operating Characteristics). This value is consistent across the TLC27xx family and reflects its suitability for low-noise amplification of high-impedance sources-particularly where noise current dominates, such as in photodiode or piezoelectric sensor interfaces.

Can the TLC279CD drive a 10 kΩ load to within 50 mV of GND?

Yes, the TLC279CD guarantees a low-level output voltage (VOL) of ≤50 mV at IOL = 0 mA and VDD = 5 V, as specified in Section 4.3. This performance holds across 0°C to 70°C and enables rail-to-rail output swing into standard 10 kΩ loads. The datasheet confirms this behavior applies to all four channels independently, supporting multi-channel analog signal routing without level translation.

Is the TLC279CD pin-compatible with other devices in the TLC27xx family?

Yes, the TLC279CD shares identical SOIC-14 (D package) pinout and footprint with TLC274CD, TLC274ACD, and TLC274BCD, as verified in Table 3-1 (Pin Functions) and the Device Information table. All variants use the same 14-pin configuration: four independent op-amp sections with standardized input/output assignments and shared VDD/GND rails-enabling drop-in replacement during design iteration or calibration grade upgrades.