Texas Instruments TLC274IDG4

Overview

TLC274IDG4 from Texas Instruments is a precision quad CMOS operational amplifier optimized for single-supply operation, featuring 10 mV max input offset voltage (C-suffix grade), 10.8 nV/√Hz input voltage noise at 1 kHz, and rail-to-rail output swing down to GND - enabling accurate signal conditioning in battery-powered sensor interfaces and industrial analog front-ends.

For engineers reviewing the TLC274IDG4 datasheet, TLC274IDG4 pinout, TLC274IDG4 application, or TLC274IDG4 equivalent, this device supports low-voltage (3–16 V) single-rail designs with high input impedance (>10¹² Ω), low bias current (≤60 pA), and wide common-mode input range extending below ground - critical for transducer amplification, active filtering, and precision instrumentation where DC accuracy and noise performance are essential.

Technical Context

The TLC274IDG4 employs a polysilicon-gate CMOS process delivering latch-up immunity, ESD protection, and stable offset voltage drift (0.3 µV/°C over 25°C–85°C). Its input stage supports common-mode voltages from –0.1 V to VDD–1.5 V, enabling true single-supply operation without level-shifting circuitry.

With 4.5 MHz unity-gain bandwidth, 0.5 V/µs slew rate, and 10 kHz maximum output-swing bandwidth into 10 kΩ, the device balances speed and precision for medium-bandwidth applications - including multi-channel data acquisition and programmable gain stages - while maintaining low quiescent current (2.24–8 mA typical across temperature).

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 6 mm body size, surface-mount, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC274IDG4, TLV2474IDR offers tighter DC specs at lower voltage but higher quiescent power, while OPA4188AIDR delivers near-zero drift at significantly higher cost and supply requirements - making TLC274IDG4 the optimal balance of precision, noise, single-supply usability, and cost for industrial and portable instrumentation.

Availability

TLC274IDG4 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical devices, and multi-channel data acquisition systems requiring stable component supply, long-lifecycle support, and consistent parametric performance across temperature.

Supply support for TLC274IDG4 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.

The TLC27xx family was developed to deliver BiFET-level precision and speed in CMOS technology - targeting cost-sensitive, single-supply applications in instrumentation, sensor signal chains, and legacy system upgrades.

FAQ

What is the operating temperature range for the TLC274IDG4?

The TLC274IDG4 is rated for –40°C to +85°C (I-suffix grade), with guaranteed performance across this range for parameters including input offset voltage (13 mV max full range), supply current (2.24–8 mA), and common-mode input range (–0.1 V to VDD–1.5 V). This makes TLC274IDG4 suitable for industrial environments where ambient temperatures exceed commercial limits.

Does the TLC274IDG4 support true rail-to-rail input operation?

No - the TLC274IDG4 supports rail-to-rail *output* swing (0 V to VDD–0.05 V), but its input common-mode range extends only to –0.1 V (below GND) and up to VDD–1.5 V. It does not accept inputs at the positive rail. For true rail-to-rail input, consider alternatives like the TLV2474IDR. The TLC274IDG4's input range is optimized for single-supply sensor interfaces where the negative rail is GND.

What is the maximum supply voltage for the TLC274IDG4?

The absolute maximum supply voltage for TLC274IDG4 is 18 V, but the recommended operating range is 4 V to 16 V for I-suffix devices (–40°C to +85°C). Operation at 16 V maximizes dynamic range and output swing, while 4 V enables compatibility with low-voltage logic families. Exceeding 16 V risks exceeding absolute maximum ratings and degrading long-term reliability.

How does the input bias current of the TLC274IDG4 affect high-impedance sensor circuits?

The TLC274IDG4 features input bias current ≤60 pA (25°C), enabling use with feedback and source impedances up to 10 MΩ without introducing significant DC error (e.g., <0.6 mV offset). This allows direct connection to piezoelectric sensors, pH electrodes, and photodiode transimpedance stages - provided PCB guard rings and low-leakage sockets are used to avoid contamination-induced leakage currents.

Can unused amplifiers in the TLC274IDG4 be left unconnected?

No - unused amplifiers in the TLC274IDG4 must be configured as unity-gain buffers with inputs tied to a valid common-mode voltage (e.g., VDD/2 via resistive divider or directly to GND if within spec) and output connected to its inverting input. Leaving inputs floating can cause oscillation or excessive current draw due to internal node instability, potentially affecting adjacent channels' performance.