Texas Instruments TLC274CDB

Overview

TLC274CDB from Texas Instruments is a precision quad CMOS operational amplifier optimized for single-supply operation, featuring 10 mV max input offset voltage (C-suffix), 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 to 70°C and delivers high input impedance (>10¹² Ω) for low-level sensor signal conditioning in industrial instrumentation.

For engineers reviewing the TLC274CDB datasheet, TLC274CDB pinout, TLC274CDB application, or TLC274CDB equivalent, key selection considerations include its guaranteed input offset voltage grade, common-mode input range extending below ground, low-noise performance at high source impedances, and SSOP-14 package compatibility with space-constrained analog front-ends.

Technical Context

The TLC274CDB uses a polysilicon-gate CMOS process to achieve ultra-low input bias current (≤60 pA typical) and stable offset voltage drift (0.3 µV/°C), enabling precision DC-coupled amplification without significant thermal error accumulation. Its input stage supports common-mode voltages down to –0.1 V (at VDD = 5 V), and output stage drives to within 50 mV of GND under load.

Designed specifically for single-supply systems, the device avoids the need for level-shifting circuitry in sensor interfaces and data acquisition channels. Its 4.5 MHz unity-gain bandwidth and 0.5 V/µs slew rate support moderate-speed signal conditioning while maintaining low quiescent current (2.24–6.4 mA total for four op-amps).

Key Specifications

Pinout & Package

Package: SSOP-14 (DB), 6.2 mm × 7.8 mm body size with 0.65 mm lead pitch; surface-mount, moisture-sensitive level 1 (MSL-1), RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2464IDR and OPA4277UA, the TLC274CDB uniquely combines 3–16 V operation, guaranteed 10 mV VIO, rail-to-rail output swing to GND, and ultra-low input bias current-making it the optimal choice for industrial and automotive single-supply sensor interfaces where supply headroom and input impedance are critical.

Availability

TLC274CDB is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical instrumentation signal chains, and automotive cabin sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC274CDB 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 cost-effective, high-input-impedance precision amplification in single-supply systems-targeting industrial automation, test equipment, and sensor signal conditioning where BiFET performance was previously required.

FAQ

What is the maximum input offset voltage specification for TLC274CDB?

The TLC274CDB has a maximum input offset voltage of 10 mV across the full operating temperature range (0°C to 70°C), as specified in the C-suffix grade electrical characteristics table. This value is guaranteed-not typical-and applies under standard test conditions (VO = 1.4 V, RS = 50 Ω, VIC = 0 V, RL = 10 kΩ). The TLC274CDB's 10 mV VIO enables reliable DC-coupled gain accuracy in applications such as strain gauge amplifiers and RTD signal conditioners without requiring frequent nulling.

Does TLC274CDB support true rail-to-rail input operation?

The TLC274CDB does not support rail-to-rail input common-mode range-it extends *below* the negative rail (to –0.1 V at VDD = 5 V) but only up to VDD – 1 V at 25°C (and VDD – 1.5 V at other temperatures). Its key strength is rail-to-rail *output* swing down to GND and up to VDD – 50 mV. This makes the TLC274CDB ideal for single-supply configurations where the input signal may go slightly negative relative to GND, but not for full VDD-referenced differential input stages.

What is the recommended bypassing scheme for TLC274CDB in SSOP-14 layout?

Each VDD pin of the TLC274CDB should be decoupled with a 0.1 µF X7R ceramic capacitor placed within 2 mm of the pin and connected directly to the local GND plane using a short, low-inductance trace. For systems with high-frequency digital noise (e.g., adjacent microcontrollers), add a 4.7 µF tantalum or polymer capacitor per VDD net. Avoid shared vias between bypass caps and GND; use dedicated thermal vias under each capacitor pad to minimize impedance.

Can unused amplifiers in the TLC274CDB be left floating?

No-unused amplifiers in the TLC274CDB must not be left floating. TI explicitly recommends configuring them as unity-gain voltage followers (noninverting, output tied to inverting input, noninverting input biased to a stable DC voltage within the common-mode range). Floating inputs can cause phase reversal, oscillation, or excessive supply current. For the TLC274CDB in SSOP-14, this means connecting pins 12/13/14 (channel 4) appropriately-even if only using channels 1–3-to ensure stability and predictable power consumption.

Is TLC274CDB suitable for driving ADC inputs directly?

Yes-the TLC274CDB is well-suited for driving SAR and delta-sigma ADC inputs directly. Its low output impedance (<100 Ω), rail-to-rail output swing (0–4.95 V at VDD = 5 V), and 4.5 MHz bandwidth allow clean settling into typical ADC input capacitances (≤20 pF). To ensure accuracy, keep the trace from TLC274CDB output to ADC input short (<10 mm), avoid routing near noisy digital lines, and use the ADC's internal reference or a buffered external reference rather than deriving reference from the TLC274CDB's supply rail.