Texas Instruments TLC277IP

Overview

TLC277IP from Texas Instruments is a precision dual CMOS operational amplifier optimized for single-supply operation, featuring 500 µV 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 4 V to 16 V over –40°C to +85°C and delivers 4.5 MHz unity-gain bandwidth - enabling high-fidelity signal conditioning in low-power sensor front-ends and portable instrumentation.

For engineers reviewing the TLC277IP datasheet, TLC277IP pinout, TLC277IP application, or TLC277IP equivalent, key selection criteria include its ultra-low input bias current (<60 pA), wide common-mode input range extending below ground, and guaranteed performance across industrial temperature ranges without requiring split supplies.

Technical Context

The TLC277IP uses a polysilicon-gate CMOS process to achieve sub-picoampere input bias current and low offset voltage drift (0.3 µV/°C). Its input stage supports common-mode voltages down to –0.1 V (at VDD = 5 V) and up to VDD – 1.5 V, enabling true single-supply operation with grounded reference points.

It delivers 0.5 V/µs slew rate and 21 V/µs under large-signal conditions, with open-loop gain >5 V/mV and phase margin of 60° at unity gain. The device exhibits 65–85 dB CMRR and PSRR over frequency, and is latch-up immune per design.

Key Specifications

Pinout & Package

Package: PDIP-8 (Plastic Dual In-line Package), 9.81 mm × 9.43 mm, through-hole mounting compatible with standard 0.3-inch DIP sockets.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC277IP, TLC277IDR offers identical precision performance in a smaller surface-mount package but sacrifices through-hole serviceability, while OPA2333PA trades higher power for dramatically improved offset drift - making it preferable only where thermal drift dominates system error budgets.

Availability

TLC277IP is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, and portable data acquisition requiring stable component supply, long-lifecycle support, and traceable sourcing from authorized channels.

Supply support for TLC277IP 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 TLC27xx family was designed as cost-effective, high-precision CMOS op-amps targeting single-supply industrial and portable instrumentation - bridging performance gaps between legacy bipolar and modern zero-drift architectures.

FAQ

What is the maximum operating temperature range for the TLC277IP?

The TLC277IP is rated for operation from –40°C to +85°C (I-suffix grade). This industrial temperature range is validated per the datasheet's Recommended Operating Conditions table and applies to all electrical specifications unless otherwise noted. The TLC277IP maintains its 500 µV max input offset voltage and 10.8 nV/√Hz noise performance across this full range, making it suitable for deployment in non-climate-controlled environments such as factory floors or vehicle cabins.

Does the TLC277IP support true rail-to-rail input operation?

The TLC277IP does not support rail-to-rail input - its common-mode input voltage range extends to –0.1 V (below ground) and up to VDD – 1.5 V at temperatures other than 25°C. While this enables ground-referenced single-supply use, the upper limit falls short of the positive rail. For example, at VDD = 5 V and TA = 85°C, the maximum allowable common-mode voltage is 3.5 V. This limitation must be considered when designing input bias networks or level-shifting stages.

Can the TLC277IP drive capacitive loads directly?

The TLC277IP is not unity-gain stable with heavy capacitive loads. The datasheet specifies a 20 pF load for slew rate and bandwidth measurements, and recommends limiting capacitive loading to ≤100 pF without isolation resistance. For larger loads (e.g., ADC input capacitors or long cables), a series resistor (≥100 Ω) between the output and load is required to maintain phase margin and prevent oscillation - verified by the 60° phase margin measurement at unity gain with CL = 20 pF.

How does the input offset voltage drift of the TLC277IP compare to the TLC272 series?

The TLC277IP has a specified input offset voltage temperature coefficient of 0.3 µV/°C over 25°C to 85°C - identical to the TLC272C, TLC272A, and TLC272B variants. However, because the TLC277IP starts with a much lower initial offset (500 µV max vs. 10 mV for TLC272C), its total drift-induced error remains significantly smaller: e.g., a 60°C rise adds only 18 µV to the TLC277IP's offset versus up to 600 µV for the TLC272C, preserving accuracy in thermally variable systems.

Is the TLC277IP pin-compatible with other TLC27xx dual op-amps?

Yes - the TLC277IP shares identical PDIP-8 pinout and footprint with TLC272, TLC272A, TLC272B, and all I-suffix variants. This allows direct substitution in existing designs for improved DC precision without PCB modification. However, note that supply current (IDD) and noise performance differ: TLC277IP draws up to 4 mA at VDD = 10 V, while TLC272C draws ≤3.2 mA; also, TLC277IP's 10.8 nV/√Hz noise is consistent across grades, unlike the higher-noise TLC272B variant.