Texas Instruments TLE2161ACP

Overview

TLE2161ACP from Texas Instruments is a JFET-input, decompensated, high-output-drive µPower operational amplifier designed for precision analog signal conditioning in space-constrained industrial and test equipment. It delivers ±2.5 V min output swing into 100 Ω at ±5 V supplies, achieves 10 V/µs typical slew rate, 6.5 MHz gain-bandwidth product, and consumes only 280 µA typical supply current - enabling high-fidelity amplification with low power in rail-to-rail–compatible systems.

For engineers reviewing the TLE2161ACP datasheet, TLE2161ACP pinout, TLE2161ACP application, or TLE2161ACP equivalent, key selection criteria include its 500 µV max input offset voltage (0°C to 70°C), JFET-input bias current of 3 pA typ, ±3.5 V to ±18 V dual-supply operation, and stability at closed-loop gains ≥5 - critical for active filter, sensor interface, and DAC output buffer designs requiring dc precision and fast transient response.

Technical Context

The TLE2161ACP uses TI's Excalibur JFET process to combine ultra-low input bias current (3 pA typ) with high output drive capability (±80 mA short-circuit current, ±2.5 V into 100 Ω). Its decompensated architecture requires minimum closed-loop gain of 5 for stability, enabling higher bandwidth than unity-gain-stable op-amps of similar class.

It features excellent dc precision: 500 µV max input offset voltage over 0°C to 70°C, 0.04 µV/month long-term drift, and 6 µV/°C tempco. Input common-mode range extends to within 1.6 V of rails at ±5 V supply, supporting wide dynamic range signal acquisition in single- or dual-supply configurations.

Key Specifications

Pinout & Package

TLE2161ACP is supplied in an 8-pin plastic DIP (P package), through-hole mountable with 0.3-inch row spacing. Pin 1 is OFFSET N1, pin 5 is NC (no internal connection), and pin 8 is OFFSET N2 - used for optional offset nulling via external potentiometer.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE2061CP and OPA2134PA, the TLE2161ACP uniquely balances decompensated speed (10 V/µs), ultra-low bias current (3 pA), and DIP-packaged offset adjustability - making it optimal for legacy test gear upgrades and precision analog subsystems where gain ≥5 and manual calibration are acceptable.

Availability

TLE2161ACP is available at Aetrix Electronics and suitable for active filter design, sensor signal conditioning, and DAC output buffering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLE2161ACP 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 decades of heritage in precision op-amp innovation.

The TLE2161 series belongs to TI's Excalibur JFET-input op-amp family, engineered for high-output-drive, low-power, and long-term dc stability in industrial test, measurement, and control systems.

FAQ

What is the minimum closed-loop gain required for stable operation of the TLE2161ACP?

The TLE2161ACP is decompensated and requires a minimum closed-loop gain of 5 for stable operation. This design choice enables its 10 V/µs slew rate and 6.5 MHz gain-bandwidth product. Using the TLE216ACP at gains below 5 may cause oscillation or excessive ringing; always verify phase margin with load and feedback network in final layout.

Does the TLE2161ACP support offset nulling, and how is it implemented?

Yes, the TLE2161ACP supports external offset nulling via pins 1 (OFFSET N1) and 8 (OFFSET N2). A 10-kΩ potentiometer is connected between these pins, with its wiper tied to VCC− (pin 4). Adjusting the potentiometer balances internal input stage mismatches, reducing input offset voltage to near-zero - a critical capability for the TLE2161ACP in precision dc-coupled applications.

What is the maximum output current capability of the TLE2161ACP, and under what conditions is it specified?

The TLE2161ACP can source and sink up to ±80 mA continuously, with unlimited short-circuit duration at or below 25°C. Its output swing is specified as ±2.5 V minimum into 100 Ω at ±5 V supplies and ±12.5 V minimum into 600 Ω at ±15 V supplies. These values reflect actual drive capability under defined load and supply conditions - essential for verifying headroom in the TLE2161ACP's target applications.

How does the input bias current of the TLE2161ACP compare to bipolar-input op-amps, and why does it matter?

The TLE2161ACP features a JFET input stage with 3 pA typical input bias current - over six orders of magnitude lower than typical bipolar-input op-amps (e.g., LM741: ~80 nA). This ultra-low bias current prevents significant voltage drop across high-impedance sources (e.g., >1 MΩ sensors), preserving signal fidelity and eliminating errors that would otherwise degrade accuracy in the TLE2161ACP's precision measurement roles.

Is the TLE2161ACP suitable for use with ±15 V supplies, and what performance changes occur at that voltage?

Yes, the TLE2161ACP operates across ±3.5 V to ±18 V, including ±15 V. At ±15 V, its output swing increases to ±12.5 V min into 600 Ω, large-signal gain improves to ≥10 V/mV (vs. ≥0.5 V/mV at ±5 V), and slew rate remains 10 V/µs typ. Supply current rises slightly to 290 µA typ, and common-mode input range expands to –11 V to +13 V - all confirmed in the TLE2161ACP's electrical characteristics tables for ±15 V operation.