Texas Instruments TLC274BCDR

Overview

TLC274BCDR from Texas Instruments is a precision quad CMOS operational amplifier optimized for single-supply operation, featuring 2000 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 GND. It operates from 4 V to 16 V across –40°C to 85°C and delivers 4.5 MHz unity-gain bandwidth with 0.5 V/µs slew rate - enabling accurate signal conditioning in low-power sensor interfaces and industrial analog front-ends.

For engineers reviewing the TLC274BCDR datasheet, TLC274BCDR pinout, TLC274BCDR application, or TLC274BCDR equivalent, this device supports precision DC-coupled amplification, single-supply transducer signal conditioning, and low-bias current active filtering where input impedance >10¹² Ω and ESD-protected inputs are required.

Technical Context

The TLC274BCDR 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 source applications such as piezoelectric sensors and pH electrodes. Its input common-mode range extends to the negative rail, and output swings to GND under load - eliminating need for dual supplies in battery-powered systems.

It integrates ESD protection circuitry and latch-up immunity, and supports stable operation with capacitive loads up to 20 pF. The device exhibits 65–85 dB CMRR and PSRR over frequency, with phase margin of 60° at unity gain - ensuring robust closed-loop stability in gain-of-100 inverting configurations and unity-gain followers.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 6 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 TLC274CDR and TLC274ACDR, the TLC274BCDR provides tighter input offset voltage control (2000 µV vs 10 mV or 5 mV), enabling higher DC accuracy in closed-loop sensor interfaces without external trimming - at minimal cost premium over the C-grade variant.

Availability

TLC274BCDR is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical instrumentation front-ends, and portable data loggers requiring stable component supply and long-term production continuity.

Supply support for TLC274BCDR 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 excellence.

The TLC27xx family was engineered for high-accuracy, low-power analog signal conditioning in single-supply systems - targeting industrial automation, test equipment, and portable instrumentation where CMOS input stage advantages are critical.

FAQ

What is the maximum input offset voltage specification for TLC274BCDR at 25°C?

The TLC274BCDR has a maximum input offset voltage of 2000 µV at 25°C, as specified in the Electrical Characteristics table for the B-grade C-suffix devices. This value increases to 3000 µV across the full 0°C to 70°C operating range. The TLC274BCDR's offset is significantly lower than the standard TLC274C (10 mV max), making it suitable for precision DC-coupled applications where trimming is impractical.

Does TLC274BCDR support true rail-to-rail output operation?

The TLC274BCDR provides rail-to-rail output swing down to GND (0 V), but its high-side output is limited to VDD–1.5 V at temperatures outside 25°C. At 25°C, VOH reaches up to VDD–0.05 V under light load. This asymmetric output range means it fully supports single-supply ADC drivers requiring GND-referenced signals but may require level-shifting for full VDD-referenced outputs.

Can TLC274BCDR operate from a 3.3 V supply?

No - the TLC274BCDR requires a minimum supply voltage of 4 V, as defined in the Recommended Operating Conditions for I-suffix devices (–40°C to 85°C). While the C-suffix TLC274C supports 3 V operation, the B-grade I-suffix variant (TLC274BCDR) is rated only from 4 V to 16 V. Using 3.3 V risks undefined behavior, reduced output swing, and failure to meet AC/DC specifications.

What is the input bias current of TLC274BCDR at 85°C?

At 85°C, the TLC274BCDR exhibits a maximum input bias current of 600 pA, per the Electrical Characteristics table for I-suffix devices at full temperature range. At 25°C, it is typically 10 pA with a maximum of 60 pA. This ultra-low bias current enables reliable operation with high-impedance sources such as pH electrodes and photodiode transimpedance feedback networks.

Is TLC274BCDR pin-compatible with other TLC274 variants in SOIC-14?

Yes - the TLC274BCDR is fully pin-compatible with all TLC274x variants (C, A, B, and standard) in the SOIC-14 (D) package. Pin configuration, function mapping, and footprint dimensions match exactly across grades. This allows drop-in replacement during design iteration or qualification, provided the system's VIO, drift, and supply voltage requirements align with the B-grade specifications.