Texas Instruments TLC27L1CP

Overview

TLC27L1CP from Texas Instruments is a low-power, single-supply operational amplifier in an 8-pin PDIP package, featuring 10 mV max input offset voltage (25°C), 68 nV/√Hz input 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 is used in battery-powered sensor signal conditioning for smoke detectors and field transmitters.

For engineers reviewing the TLC27L1CP datasheet, TLC27L1CP pinout, TLC27L1CP application, or TLC27L1CP equivalent, key selection criteria include ultra-low supply current (17 µA typ at 5 V), LinCMOS input stage enabling high 10¹² Ω input impedance, and guaranteed operation with common-mode input extending below ground - critical for single-supply industrial analog front-ends.

Technical Context

The TLC27L1CP uses Texas Instruments' silicon-gate LinCMOS process, delivering stable input offset voltage drift (0.1 µV/month) and latch-up immunity without bipolar power penalties. Its input stage supports single-supply operation with common-mode range extending 0.2 V below ground and output swing including the negative rail.

It features internal ESD protection rated to 2000 V (MIL-STD-883C, Method 3015.2), and includes two legacy offset adjustment pins (OFFSET N1 and OFFSET N2) that are NC on new silicon - confirmed functional only on legacy die revisions.

Key Specifications

Pinout & Package

Package: 8-pin PDIP (P package), 0.3-inch width, through-hole mounting compatible with standard PCB assembly and prototyping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-power operational amplifier applications.

Compared with TLC27L1CP, TLC27L2CP offers channel integration at no quiescent current penalty, while TLV2461CP trades 15× higher supply current for 2.4× lower noise and 18× higher output drive - making TLC27L1CP optimal for energy-constrained, low-frequency sensor interfaces where DC accuracy and battery longevity dominate.

Availability

TLC27L1CP is available at Aetrix Electronics and suitable for smoke detector design, pressure transmitter manufacturing, and temperature transmitter development requiring stable component supply across extended production lifecycles.

Supply support for TLC27L1CP 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLC27L1x family was designed specifically for low-power, single-supply industrial sensor signal conditioning - emphasizing long-term offset stability, rail-to-rail output, and ultra-low quiescent current in legacy-compatible packages.

FAQ

What is the maximum input offset voltage specification for TLC27L1CP at 25°C?

The maximum input offset voltage for TLC27L1CP at 25°C is 10 mV, as specified in the Electrical Characteristics table for the C-suffix (0°C to 70°C) grade. This value represents the worst-case DC error at room temperature and is critical for precision DC amplification stages in sensor interfaces. The TLC27L1CP achieves this performance using TI's LinCMOS process, which provides superior offset stability compared to metal-gate alternatives. This parameter is fully tested and guaranteed across production lots.

Does TLC27L1CP support true single-supply operation with inputs below ground?

Yes, TLC27L1CP supports true single-supply operation with its common-mode input voltage range extending to –0.2 V (below ground) at VDD = 5 V and 25°C. This capability allows direct connection to grounded transducer outputs - such as thermocouples or strain gauge bridges - without level-shifting circuitry. The LinCMOS input stage enables this feature while maintaining high input impedance and low bias current. Operation below ground is validated across the full 0°C to 70°C temperature range per the Recommended Operating Conditions table.

What is the typical supply current of TLC27L1CP at 5 V and 25°C?

The typical supply current of TLC27L1CP is 17 µA at VDD = 5 V and TA = 25°C, as stated in Section 5.4 (Electrical Characteristics, C Suffix). This ultra-low quiescent current enables multi-year battery operation in remote sensing applications. At 0°C, it rises to 21 µA, and at 70°C, it drops to 14 µA - confirming stable low-power behavior across the full commercial temperature range. This value reflects total device current with no load and VIC = VDD/2.

Are the OFFSET N1 and OFFSET N2 pins functional on all TLC27L1CP units?

No - the OFFSET N1 (Pin 1) and OFFSET N2 (Pin 5) pins are functional only on legacy silicon revisions of TLC27L1CP; on new silicon, both pins are NC (not internally connected). The datasheet explicitly states this distinction in Table 4-1: "On legacy silicon: … On new silicon: NC, non internally connected pin." Users must verify silicon revision via date code or TI documentation before implementing offset trimming. For new designs, these pins should be left unconnected or tied to ground per layout best practices.

What package type is used for the TLC27L1CP part number?

The TLC27L1CP uses an 8-pin plastic dual in-line package (PDIP), designated as "P" in TI's packaging nomenclature. This through-hole package has a 0.3-inch body width and 0.1-inch pin pitch, compatible with standard wave soldering and breadboard prototyping. It is distinct from the SOIC-8 "D" package variant (TLC27L1CD), and the "CP" suffix explicitly denotes the PDIP configuration with commercial temperature range (0°C to 70°C). Mechanical dimensions and land patterns are documented in TI's SLMA005 package drawing.