Texas Instruments TLC1079CNS

Overview

TLC1079CNS from Texas Instruments is a quad ultra-low-power precision operational amplifier with LinCMOS™ input stage, 850 µV max input offset voltage (0°C to 70°C), 47 V/ms typical slew rate, and 150 µW per amplifier supply current at 5 V. It operates down to 1.4 V supply and features rail-to-rail output swing to the negative rail-ideal for low-voltage battery-powered instrumentation and sensor signal conditioning.

For engineers reviewing the TLC1079CNS datasheet, TLC1079CNS pinout, TLC1079CNS application, or TLC1079CNS equivalent, key selection criteria include its 0°C to 70°C temperature grade, DIP-14 package, sub-1 µA input bias current, 110 kHz unity-gain bandwidth, and compatibility with single-cell silver-oxide watch battery systems.

Technical Context

The TLC1079CNS integrates four independent precision op-amps in a single 14-pin plastic DIP package, each featuring high-impedance LinCMOS™ inputs (I_IB = 0.6 pA typ), internal ESD protection (2000 V HBM), and latch-up immunity under ±100 mA surge currents. Its architecture supports common-mode input voltage extending below the negative rail and output swing to ground-enabling true single-supply operation without level-shifting circuitry.

Designed for ultra-low-power analog front-ends, it delivers 800,000 typ open-loop gain, 70 dB min CMRR, and 75 dB min PSRR across its operating range. The device's 0.1 µV/month input offset drift and 1.1 µV/°C tempco support long-term stability in portable medical sensors and precision data loggers where calibration intervals are extended.

Key Specifications

Pinout & Package

Package: 14-pin plastic DIP (N 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 quad precision op-amp applications.

Compared with TLC27L4CN and LM324N, the TLC1079CNS delivers 10× lower input bias current, 2× lower offset voltage, and 10× lower power consumption-making it uniquely suited for battery-powered precision analog systems where signal fidelity and energy efficiency are co-constrained.

Availability

TLC1079CNS is available at Aetrix Electronics and suitable for portable medical sensors, low-power data loggers, single-cell watch circuits, and industrial process transmitters requiring stable component supply across extended production lifecycles.

Supply support for TLC1079CNS 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 and embedded processing technologies, with over 90 years of innovation in precision analog ICs.

The TLC107x family was designed specifically for ultra-low-power, high-precision signal conditioning in battery-operated instrumentation-emphasizing sub-µA input bias, rail-to-rail output, and 1.4 V minimum operation.

FAQ

What is the minimum supply voltage for reliable operation of the TLC1079CNS?

The TLC1079CNS is specified to operate down to 1.4 V across its full 0°C to 70°C temperature range. At this voltage, it maintains functional output swing, 110 kHz unity-gain bandwidth, and 850 µV max input offset voltage. Operation below 1.4 V may result in reduced open-loop gain and increased distortion, so system design must ensure stable regulation above this threshold. The TLC1079CNS datasheet confirms this limit under Recommended Operating Conditions.

Does the TLC1079CNS support rail-to-rail input common-mode range?

No-the TLC1079CNS supports common-mode input voltage extending 0.2 V below the negative rail (GND) but only up to V_DD – 0.2 V on the high side. Its input stage is not rail-to-rail on the positive end. This asymmetric range is confirmed in the Electrical Characteristics table, where VICR is listed as "–0.2 V to 4 V" at V_DD = 5 V. The TLC1079CNS does provide rail-to-rail *output* swing to GND, however.

Can the TLC1079CNS drive capacitive loads without instability?

Yes-the TLC1079CNS is stable with up to 20 pF capacitive load at unity gain, as verified in the Operating Characteristics section (Figure 2 test conditions). Phase margin remains ≥34° under these conditions. For loads >20 pF, external series resistance (≥100 Ω) at the output is recommended to maintain stability. This behavior is intrinsic to the TLC1079CNS internal compensation and does not require external components for typical sensor interface applications.

How does the input offset voltage drift specification apply to the TLC1079CNS?

The TLC1079CNS specifies 0.1 µV/month typical input offset voltage drift, including the first 30 days-verified via accelerated aging tests per TI's qualification standards. This long-term stability metric reflects parametric shift due to dielectric relaxation and interfacial charge migration, not temperature effects (which are covered separately by the 1.1 µV/°C tempco). Designers can rely on this value for predicting calibration intervals in unattended field deployments of the TLC1079CNS.

Is the TLC1079CNS pin-compatible with other quad op-amps in DIP-14 packages?

The TLC1079CNS uses the industry-standard quad op-amp pinout (1OUT, 1IN–, 1IN+, GND, VDD, 2IN+, 2IN–, 2OUT, 3OUT, 3IN–, 3IN+, 4IN+, 4IN–, 4OUT), matching LM324, TLC27L4, and TL084. However, functional compatibility requires verification of supply voltage, input/output swing, and bias current requirements-since the TLC1079CNS operates at 1.4 V and draws far less current than those alternatives. Direct substitution is possible only when those parameters align.