Texas Instruments TLC27M4IN

Overview

TLC27M4IN from Texas Instruments is a LinCMOS™ precision quad operational amplifier optimized for low-power, high-input-impedance analog signal conditioning in industrial and test equipment. It delivers ±300 µV max input offset voltage at 25°C (VDD = 5 V), ±0.6 µV/°C drift, 32 nV/√Hz input noise at 1 kHz, rail-to-rail output swing to negative rail, and operates from 4 V to 16 V across −40°C to +85°C.

For engineers reviewing the TLC27M4IN datasheet, TLC27M4IN pinout, TLC27M4IN application, or TLC27M4IN equivalent, this device is selected for precision sensor interfacing, multiplexed data acquisition front-ends, and low-quiescent-current analog I/O modules where input bias current below 60 pA and CMOS input stage integrity are critical.

Technical Context

The TLC27M4IN uses a LinCMOS™ process to combine bipolar-like speed (1.1 MHz unity-gain bandwidth, 0.5 V/µs slew rate) with MOSFET-level input characteristics: 6 TΩ typical input impedance and sub-60 pA input bias current at 25°C. Its four independent amplifiers share a single 14-pin PDIP package with common supply rails.

It supports single-supply operation down to 4 V over −40°C to +85°C, features ESD protection and latch-up immunity, and maintains stable phase margin (≥60°) under 10 kΩ load and 20 pF capacitance - enabling direct driving of ADC inputs and analog multiplexers without external isolation.

Key Specifications

Pinout & Package

Package: PDIP-14 (Plastic Dual In-line Package), 19.3 mm × 6.35 mm, 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 TLC27M4IN, TLC27M4CD offers smaller footprint but reduced temperature range, while TLC27M4BID trades offset precision for cost and package flexibility - making TLC27M4IN the optimal choice for ruggedized, high-accuracy analog I/O requiring through-hole reliability and tight DC specs.

Availability

TLC27M4IN is available at Aetrix Electronics and suitable for multiplexed data acquisition, industrial PLC analog modules, and portable test equipment requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for TLC27M4IN 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, embedded processing, and connectivity technologies, with decades of heritage in precision op-amps and industrial-grade components.

The TLC27Mxx family was designed specifically for high-accuracy, low-power analog signal conditioning in harsh industrial environments - emphasizing offset stability, input impedance, and single-supply operability over raw speed.

FAQ

What is the maximum operating temperature range for the TLC27M4IN?

The TLC27M4IN is specified for operation from −40°C to +85°C, with electrical characteristics fully guaranteed across this extended industrial temperature range. Absolute maximum ratings allow storage up to +150°C, but functional performance is only validated within the −40°C to +85°C operating band. This makes the TLC27M4IN suitable for deployment in factory automation, outdoor metering, and motor control cabinets where ambient extremes occur.

Does the TLC27M4IN support true rail-to-rail output?

The TLC27M4IN output swings to the negative rail (GND) but does not reach the positive rail (VDD). At VDD = 5 V and 25°C, VOH is typically 4.95 V - leaving ~50 mV headroom. This near-rail output enables single-supply operation without level-shifting for most 12-bit ADC interfaces, while maintaining robust drive capability into 10 kΩ loads. The design intentionally prioritizes low-offset stability over full VDD reach.

Can the TLC27M4IN be used with a 3 V supply?

No - the TLC27M4IN requires a minimum supply voltage of 4 V across its −40°C to +85°C operating range. While earlier TLC27Mx variants (e.g., TLC27M4C) support 3 V at 0°C to 70°C, the "I" suffix in TLC27M4IN denotes the industrial-grade version with tightened supply limits to ensure parametric consistency under thermal stress. Using <4 V risks undefined behavior, including degraded CMRR and increased input bias current.

How many independent amplifiers does the TLC27M4IN contain?

The TLC27M4IN contains four fully independent operational amplifiers in a single 14-pin PDIP package. Each amplifier has dedicated inverting and non-inverting inputs and an output pin, with no shared internal nodes. This architecture allows simultaneous signal conditioning of four distinct analog channels - such as sensor inputs, reference buffers, filter stages, or current-sense amplifiers - without crosstalk degradation beyond −100 dB.

Is the TLC27M4IN pin-compatible with other TLC27Mx variants?

Yes - all TLC27Mx quad op-amps (including TLC27M4IN, TLC27M4CD, TLC27M4BID, and TLC27M9IN) share identical 14-pin PDIP and SOIC footprints and pinouts. The pin configuration is standardized across the family: pins 1–7 and 8–14 follow the same channel A–D layout and power/ground assignments. This allows drop-in replacement between variants when package and temperature grade align with system requirements.