Texas Instruments TLC277CD

Overview

TLC277CD from Texas Instruments is a precision dual CMOS operational amplifier optimized for single-supply operation, featuring 500 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 4.5 MHz unity-gain bandwidth with 0.5 V/µs slew rate - enabling high-fidelity signal conditioning in battery-powered sensor interfaces and analog front-ends.

For engineers reviewing the TLC277CD datasheet, TLC277CD pinout, TLC277CD application, or TLC277CD equivalent, key selection considerations include its low input bias current (<60 pA), wide common-mode input range extending below ground, and guaranteed performance across industrial temperature ranges without requiring split supplies.

Technical Context

The TLC277CD uses a polysilicon-gate CMOS process to achieve ultra-high input impedance (>10¹² Ω) and sub-picoampere input bias current, minimizing loading on high-impedance sources like piezoelectric sensors and photodiode transimpedance stages. Its input stage supports common-mode voltages as low as –0.1 V (at VDD = 5 V), enabling true single-supply operation with ground-referenced inputs.

Internally compensated for unity-gain stability, the device provides 60° phase margin with 20 pF load and exhibits robust supply-voltage rejection (≥65 dB) and common-mode rejection (≥65 dB) - critical for precision DC-coupled amplification in noisy mixed-signal environments such as data acquisition systems and programmable logic controller analog I/O modules.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), 4.9 mm × 6.0 mm body, 1.27 mm pitch, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC277CD, OPA2333AIDR offers superior drift performance at higher power cost, while MCP6022-I/SN trades precision and rail-to-rail output for lower unit price - making TLC277CD the optimal balance of accuracy, single-supply usability, and power efficiency in mid-tier industrial designs.

Availability

TLC277CD is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, portable data loggers, and automotive cabin sensors requiring stable component supply across extended product lifecycles.

Supply support for TLC277CD 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 cost-sensitive, high-accuracy analog signal chains in industrial, medical, and portable equipment - prioritizing single-supply operability, low drift, and robust ESD tolerance without sacrificing speed.

FAQ

What is the maximum input offset voltage specification for TLC277CD at room temperature?

The TLC277CD has a maximum input offset voltage of 500 µV at 25°C, as specified in the Electrical Characteristics table under VIO parameter for TLC277C grade devices. This value applies across the full recommended operating conditions and is guaranteed by TI's production testing. The TLC277CD maintains this precision grade consistently across its SOIC-8 packaging variant.

Does TLC277CD support true single-supply operation with ground-referenced inputs?

Yes, the TLC277CD supports true single-supply operation: its common-mode input voltage range extends to –0.1 V below the negative rail (GND) at VDD = 5 V, and its output swings fully to GND. This eliminates the need for virtual-ground circuitry or dual supplies in applications like sensor front-ends and battery-powered instrumentation where ground is the natural reference point.

What is the typical input bias current of TLC277CD and why does it matter in high-impedance circuits?

The TLC277CD exhibits a typical input bias current of 10 pA at 25°C, with a maximum of 60 pA. This ultra-low value prevents significant voltage drop across high-impedance sources (e.g., >1 MΩ RTD bridges or photodiode feedback networks), preserving signal fidelity and avoiding measurement errors that would occur with bipolar op-amps drawing nanoamps.

Can TLC277CD drive capacitive loads, and what is its phase margin with 20 pF?

The TLC277CD is internally compensated for unity-gain stability and specifies a phase margin of 60° with a 20 pF capacitive load at 25°C. It can safely drive up to 20 pF directly; for larger loads, external isolation resistance (e.g., 10–100 Ω in series with the output) is recommended to maintain stability without degrading bandwidth significantly.

Is TLC277CD qualified for automotive applications?

The TLC277CD is rated for 0°C to 70°C operation (C-suffix), meeting commercial and industrial temperature requirements but not AEC-Q200 or AEC-Q100 automotive qualification. For automotive cabin sensors operating within this temperature range, system-level validation is required; TI offers automotive-grade alternatives like TLV2772QDRQ1 for qualified deployments.