Texas Instruments TLC274ACNG4

Overview

TLC274ACNG4 from Texas Instruments is a precision quad CMOS operational amplifier optimized for single-supply operation, featuring 5 mV 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 to 70°C and delivers 4.5 MHz unity-gain bandwidth with 0.5 V/μs slew rate - enabling high-fidelity signal conditioning in low-power sensor front-ends and industrial analog interfaces.

For engineers reviewing the TLC274ACNG4 datasheet, TLC274ACNG4 pinout, TLC274ACNG4 application, or TLC274ACNG4 equivalent, key selection criteria include its guaranteed 5 mV input offset voltage grade (A-suffix), PDIP-14 package compatibility with legacy through-hole layouts, single-supply common-mode range extending below ground, and low 6.4 mA typical supply current across all four amplifiers - critical for battery-powered instrumentation and multi-channel data acquisition systems.

Technical Context

The TLC274ACNG4 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 transducer interfaces where leakage-induced errors must be minimized. Its input stage supports common-mode voltages as low as –0.1 V (at VDD = 5 V), while the output stage drives to within 50 mV of GND and 0.05 V of VDD under 10 kΩ load.

This device belongs to the TLC27xx family's "A-grade" precision tier - distinct from the standard TLC274C (10 mV VIO) and high-precision TLC274BC (2 µV VIO) - and shares identical pinout, package, and AC performance with other C/I-suffix variants but guarantees tighter DC specifications across temperature.

Key Specifications

Pinout & Package

Package: PDIP-14 (N), 19.3 mm × 9.4 mm body, through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV274IPW, TLC274ACNG4 offers tighter offset (5 mV vs. 6 mV) and higher bandwidth (4.5 MHz vs. 3 MHz) at higher supply current; compared with OPA2333AIDR, it trades zero-drift performance for lower cost and native quad integration - making TLC274ACNG4 optimal for mid-accuracy, multi-channel industrial signal chains.

Availability

TLC274ACNG4 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical devices, automotive cabin monitoring systems, and test equipment requiring stable component supply with long-term manufacturability and through-hole assembly compatibility.

Supply support for TLC274ACNG4 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 expertise in precision op-amp design and manufacturing.

The TLC27xx family was developed to deliver BiFET-level precision and speed in low-cost CMOS technology - targeting cost-sensitive industrial, medical, and automotive applications needing reliable single-supply operation and high input impedance.

FAQ

What is the maximum operating temperature range for the TLC274ACNG4?

The TLC274ACNG4 is rated for 0°C to 70°C ambient operation (C-suffix grade). Its recommended supply voltage range is 3 V to 16 V within this temperature span. Absolute maximum junction temperature is 150°C, but continuous operation above 70°C is not guaranteed per datasheet specifications - for extended temperature applications, consider the TLC274AI variant (-40°C to 85°C).

Does the TLC274ACNG4 support true rail-to-rail input operation?

No - the TLC274ACNG4 supports rail-to-rail *output* swing (within 50 mV of GND and VDD), but its input common-mode range extends only to –0.1 V below GND and up to VDD – 1 V at 25°C. It does not accept signals at the positive rail. This makes it single-supply compatible but not fully rail-to-rail input - unlike newer CMOS op-amps such as the TLV274.

Can unused amplifiers in the TLC274ACNG4 be left floating?

No - unused amplifiers must be configured as unity-gain voltage followers with inputs tied to a valid common-mode voltage (e.g., VDD/2 via resistor divider) and outputs connected to their own inverting inputs. Leaving inputs or outputs unconnected risks oscillation, increased supply current, or unpredictable output states that may affect adjacent channels.

What is the typical input bias current of the TLC274ACNG4 at 70°C?

At 70°C, the TLC274ACNG4 exhibits a typical input bias current of 40 pA (max 600 pA), per Section 4.3 of the datasheet. This remains sufficiently low to avoid significant error with source impedances up to 100 kΩ - critical for maintaining accuracy in high-impedance sensor interfaces across the full operating temperature range.

Is the TLC274ACNG4 pin-compatible with other TLC27xx variants in PDIP-14?

Yes - the TLC274ACNG4 shares identical pinout, package dimensions, and electrical interface with all TLC27xx quad op-amps in the N (PDIP-14) package, including TLC274CNG4, TLC274BNG4, and TLC279NG4. This allows drop-in replacement for different offset voltage grades without PCB redesign, though system-level validation of DC accuracy and thermal behavior is recommended.