Texas Instruments TLC27L9IN

Overview

TLC27L9IN from Texas Instruments is a precision quad operational amplifier using LinCMOS™ technology, designed for ultra-low-power, single-supply sensor signal conditioning. It delivers 1 mV max input offset voltage at 25°C, 10¹² Ω input impedance, and operates from 4 V to 16 V across –40°C to +85°C - enabling use in battery-powered field transmitters and smoke detectors.

For engineers reviewing the TLC27L9IN datasheet, TLC27L9IN pinout, TLC27L9IN application, or TLC27L9IN equivalent, this page provides verified electrical specs, package mapping (PDIP-14), functional role in analog front-ends, and two validated alternative op amps with documented parameter and temperature-range differences.

Technical Context

The TLC27L9IN implements a silicon-gate LinCMOS™ input stage, delivering rail-to-rail output swing (including negative rail), common-mode input voltage extending below ground, and latch-up immunity - all without bipolar power penalties. Its architecture supports stable operation with capacitive loads up to 20 pF and maintains phase margin ≥28° over full temperature range.

It is characterized for industrial temperature operation (–40°C to +85°C) and features ESD protection rated to 2000 V (MIL-STD-883C, Method 3015.2). Input bias current remains ≤200 pA at 85°C, and supply current is 39–72 μA per device (four amplifiers) under 5 V operation.

Key Specifications

Pinout & Package

TLC27L9IN is supplied in a 14-pin plastic dual in-line package (PDIP-14), with 0.3-inch body width and standard through-hole mounting footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC27L9IN, TLC27L9CD trades industrial temperature rating for compact SOIC packaging, while OPA2333AIDR replaces LinCMOS stability with zero-drift correction at higher power cost - making TLC27L9IN optimal for cost-sensitive, battery-operated field transmitters requiring guaranteed –40°C startup and 10-year calibration hold.

Availability

TLC27L9IN is available at Aetrix Electronics and suitable for industrial field transmitters, smoke detectors, and battery-powered sensor nodes requiring stable component supply with extended temperature qualification and long-lifecycle availability.

Supply support for TLC27L9IN 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 for industrial, automotive, and communications markets.

The TLC27Lx family was engineered for precision, ultra-low-power analog signal conditioning in harsh environments - targeting field instrumentation, safety-critical sensors, and energy-constrained remote monitoring systems.

FAQ

What is the maximum input offset voltage specification for TLC27L9IN at 25°C?

The TLC27L9IN has a maximum input offset voltage of 1000 µV (1 mV) at 25°C, as specified in the Electrical Characteristics table for I-suffix devices under VDD = 5 V or 10 V conditions. This value is confirmed across both temperature ranges and represents the upper limit for production units - critical for precision DC amplification in field transmitters where calibration stability is essential. The TLC27L9IN achieves this grade via tighter internal trimming than lower-grade variants like TLC27L4I.

Does TLC27L9IN support true single-supply operation with inputs referenced to ground?

Yes, the TLC27L9IN supports true single-supply operation with inputs referenced to ground. Its common-mode input voltage range extends to –0.2 V below GND at 25°C and –0.2 V to 3.5 V at full –40°C to +85°C range (VDD = 5 V), allowing direct connection of grounded sensors such as thermocouples or resistive bridges without level-shifting circuitry. This capability is enabled by its LinCMOS™ input stage and is explicitly validated in Section 5.3 Recommended Operating Conditions.

What package type is used for TLC27L9IN, and is it through-hole or surface-mount?

TLC27L9IN uses the N (PDIP-14) package - a 14-pin plastic dual in-line package with 0.3-inch body width and through-hole leads. It is a legacy through-hole package intended for prototyping, industrial control boards, and applications requiring mechanical robustness and serviceability. Unlike SOIC or TSSOP variants, the PDIP-14 version supports wave soldering and manual rework without specialized equipment.

How does the input bias current of TLC27L9IN behave across temperature?

The input bias current of TLC27L9IN increases with temperature: it is typically 0.6 pA at 25°C (VDD = 5 V), rising to ≤200 pA at +85°C. This behavior is documented in Section 5.8 (Electrical Characteristics, VDD = 5 V, I Suffix) and reflects the intrinsic leakage characteristics of the LinCMOS™ process. Despite the increase, the value remains sub-nanoampere across the full industrial range - preserving high-impedance node integrity in applications like pH electrode buffers or photodiode transimpedance stages.

Is TLC27L9IN pin-compatible with other members of the TLC27Lx family?

Yes, TLC27L9IN is fully pin-compatible with all TLC27Lx quad op amps in the same package variant (e.g., TLC27L4IN, TLC27L4AIN, TLC27L4BIN), sharing identical PDIP-14 pinout, supply connections (VDD, GND), and channel I/O assignments. This allows drop-in replacement for performance upgrades - for example, substituting TLC27L9IN into an existing TLC27L4IN design to improve DC accuracy without PCB revision, provided the wider VIO tolerance of the original part is no longer acceptable.