Texas Instruments TLC27M4ACDR

Overview

TLC27M4ACDR from Texas Instruments is a LinCMOS™ precision quad operational amplifier optimized for low-power, high-input-impedance analog signal conditioning in single-supply systems. It delivers ±500 µV max input offset voltage at 25°C, ±0.6 µV/°C drift, 32 nV/√Hz input noise at 1 kHz, 1.1 MHz unity-gain bandwidth, and rail-to-rail output swing down to the negative rail - enabling accurate sensor interfacing and multiplexed data acquisition in industrial PLCs and test equipment.

For engineers reviewing the TLC27M4ACDR datasheet, TLC27M4ACDR pinout, TLC27M4ACDR application, or TLC27M4ACDR equivalent, this device is selected for precision DC-coupled amplification where low quiescent current (120 µA per two amps), high CMRR (65–80 dB), and stable operation across 4 V to 16 V supply ranges are critical - especially in battery-powered instrumentation and motor control feedback loops.

Technical Context

The TLC27M4ACDR uses LinCMOS™ process technology to achieve bipolar-like speed (1.1 MHz GBW) with MOSFET-level input impedance (6 TΩ typical) and ultra-low bias currents (±10 pA typ). Its input stage supports common-mode voltages down to −0.2 V below ground, and its output drives loads to within 50 mV of either rail under no-load conditions.

It operates across 0°C to 70°C (C-suffix), with specified performance at 5 V and 10 V supplies. The device features built-in ESD protection and latch-up immunity, making it robust in noisy industrial environments without requiring external protection circuitry.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 8.65 mm × 3.9 mm, tape-and-reel (R suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV274IDR and OPA4340UA, the TLC27M4ACDR uniquely balances 1.1 MHz bandwidth, 4–16 V operation, and ±500 µV offset in a cost-optimized SOIC-14 package - making it optimal for industrial analog I/O where supply flexibility and DC accuracy outweigh raw speed or ultra-low noise.

Availability

TLC27M4ACDR is available at Aetrix Electronics and suitable for industrial PLC analog modules, multiplexed sensor data loggers, and motor drive feedback circuits requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLC27M4ACDR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TLC27Mxx family was designed specifically for precision, low-power, single-supply analog signal conditioning - targeting applications where LinCMOS™ technology delivers MOSFET input benefits without sacrificing speed or DC accuracy.

FAQ

What is the maximum operating temperature range for the TLC27M4ACDR?

The TLC27M4ACDR is rated for 0°C to 70°C operation (C-suffix grade). Its electrical specifications - including ±500 µV input offset voltage and 1.1 MHz unity-gain bandwidth - are guaranteed across this full range. At 70°C, supply current rises to 160 µA per two amplifiers, and large-signal voltage gain remains ≥15 V/mV.

Does the TLC27M4ACDR support true single-supply operation with ground-referenced inputs?

Yes. The TLC27M4ACDR accepts common-mode input voltages down to −0.2 V (below GND) and swings its output to within 50 mV of GND. This enables direct interfacing with ground-referenced sensors (e.g., thermistors, potentiometers) using only a single positive supply (4–16 V), eliminating the need for split supplies or level-shifting circuitry.

What is the typical input bias current of the TLC27M4ACDR, and why does it matter?

The TLC27M4ACDR has a typical input bias current of ±10 pA at 25°C. This ultra-low value prevents significant voltage drop across high-impedance sources (e.g., >100 MΩ pH electrodes or piezoelectric sensors), preserving signal fidelity and eliminating offset errors that would otherwise require complex compensation networks in the TLC27M4ACDR design.

Can the TLC27M4ACDR drive capacitive loads without instability?

The TLC27M4ACDR exhibits 60° phase margin at unity gain with 20 pF load and 10 kΩ series resistance. For direct capacitive loads >100 pF, a small series resistor (20–100 Ω) at the output is recommended to maintain stability. Its 1.1 MHz bandwidth and 0.5 V/µs slew rate make it suitable for driving ADC input capacitors and moderate-length PCB traces without oscillation when properly compensated in the TLC27M4ACDR layout.

How does the TLC27M4ACDR compare to the TLC27M4BCDR in terms of offset voltage?

The TLC27M4ACDR has a maximum input offset voltage of ±500 µV at 25°C, while the TLC27M4BCDR is graded to ±2000 µV. This tighter offset spec makes the TLC27M4ACDR suitable for applications demanding higher DC accuracy - such as precision weigh scales or medical sensor interfaces - whereas the TLC27M4BCDR serves cost-sensitive, lower-accuracy industrial monitoring where calibration is applied externally.