Texas Instruments TLC1078CP

Overview

TLC1078CP from Texas Instruments is a dual-channel LinCMOS™ µPOWER precision operational amplifier in an 8-pin plastic DIP package, featuring 450 µV max input offset voltage, 0.6 pA typical input bias current, 47 V/ms typical slew rate, and ultra-low 150 µW per amplifier supply current at 5 V - enabling single silver-oxide watch battery operation down to 1.4 V.

For engineers reviewing the TLC1078CP datasheet, TLC1078CP pinout, TLC1078CP application, or TLC1078CP equivalent, this device is selected for ultra-low-power, rail-to-rail output, and negative-rail-input precision signal conditioning in battery-constrained instrumentation, medical sensors, and portable data acquisition systems where long-term offset stability (0.1 µV/month drift) and ESD-hardened inputs are critical.

Technical Context

The TLC1078CP implements a dual-channel CMOS op-amp architecture with high-impedance LinCMOS™ inputs, internal ESD protection rated to 2000 V (MIL-PRF-38535 Method 3015.2), and latch-up immunity under ±100 mA surge currents. Its input stage extends common-mode voltage below the negative rail, and its output swings fully to the negative rail - supporting true single-supply operation.

It delivers 800,000 typical open-loop gain, 110 kHz unity-gain bandwidth, and 95 dB typical CMRR at 25°C, with guaranteed performance across 0°C to 70°C (C-suffix). The design inhibits input/output latch-up and supports capacitive loads up to 20 pF while maintaining phase margin ≥34°.

Key Specifications

Pinout & Package

Package: 8-pin plastic DIP (P package), 0.300-inch wide body, through-hole mounting, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC27L2CP, the TLC1078CP delivers 3× lower offset, 100× lower input bias, and 10× lower power - making it irreplaceable in long-life battery systems. Against LPV521MG, it trades femtoampere bias for dual-channel integration, DIP packaging, and broader temperature validation (0°C–70°C vs –40°C–125°C).

Availability

TLC1078CP is available at Aetrix Electronics and suitable for portable medical sensors, low-power data loggers, and industrial process transmitters requiring stable component supply with long-lifecycle support and traceable sourcing.

Supply support for TLC1078CP 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 digital signal solutions, with decades of heritage in precision op-amps and low-power design.

The TLC107x product line was engineered specifically for µPOWER precision applications - targeting battery-operated instrumentation, sensor signal chains, and portable test equipment where offset stability, rail-to-rail operation, and sub-µA quiescent current are non-negotiable.

FAQ

What is the minimum supply voltage for reliable operation of the TLC1078CP?

The TLC1078CP operates reliably down to 1.4 V, as specified in the recommended operating conditions. This enables direct connection to silver-oxide watch batteries (nominal 1.55 V) and alkaline cells (1.5 V) without regulation. At 1.4 V, key parameters including input offset voltage, slew rate, and output drive remain functional, though bandwidth and open-loop gain decrease slightly versus 5 V operation. The device remains fully specified across 0°C to 70°C at this voltage.

Does the TLC1078CP support rail-to-rail input and output?

The TLC1078CP supports rail-to-rail output swing - its output reaches the negative rail (GND) and comes within ~100 mV of VDD. For input, it features extended common-mode range that includes the negative rail (down to –0.2 V at VDD = 5 V), but does not reach VDD. It is not a full rail-to-rail input op-amp; the upper common-mode limit is VDD – 1 V. This asymmetry makes it ideal for single-supply systems where ground-referenced inputs dominate.

How does the input offset voltage drift over time for the TLC1078CP?

The TLC1078CP exhibits typical input offset voltage drift of 0.1 µV per month, including the first 30 days - a specification explicitly documented in the datasheet. This exceptional long-term stability results from LinCMOS™ process optimization and on-chip stabilization techniques. Unlike many op-amps with logarithmic or unpredictable aging, this linear, low-drift behavior enables calibration intervals of 6–12 months in metrology-grade portable instruments without performance degradation.

Is the TLC1078CP pin-compatible with other Texas Instruments op-amps?

Yes - the TLC1078CP is functionally and pin-compatible with the TLC27L2 series (e.g., TLC27L2CP) in the same 8-pin DIP package. This allows direct upgrade paths in existing designs to achieve lower offset (450 µV vs 1.3 mV), lower bias current (0.6 pA vs 60 pA), and 10× reduced power. No PCB changes are required; only firmware or layout validation may be needed to confirm stability with the improved AC performance (e.g., 47 V/ms slew rate vs 0.03 V/ms).

What is the maximum capacitive load the TLC1078CP can drive without instability?

The TLC1078CP is characterized for stable operation with up to 20 pF capacitive load, as confirmed in the unity-gain bandwidth and phase margin test circuits (Figure 2). With CL = 20 pF, phase margin remains ≥34° across temperature and supply voltage. Driving larger loads (e.g., >50 pF) requires isolation via a series resistor (typically 10–100 Ω) between the output and capacitance to maintain stability. This capability supports direct interfacing to ADC input capacitors and moderate-length PCB traces without added buffering.