Texas Instruments TLE2161ID

Overview

TLE2161ID from Texas Instruments is a JFET-input, decompensated, high-output-drive µPower operational amplifier designed for precision analog signal conditioning in wide-temperature industrial systems. It delivers ±12.5 V min output swing into 600 Ω at ±15 V supplies, 10 V/µs typical slew rate, 6.5 MHz gain-bandwidth product, and 500 µV max input offset voltage over –40°C to +85°C - enabling use in high-fidelity sensor front-ends and active filter stages.

For engineers reviewing the TLE2161ID datasheet, TLE2161ID pinout, TLE2161ID application, or TLE2161ID equivalent, key selection criteria include its JFET-input low bias current (5 pA typ), low supply current (280 µA typ), decompensated stability requirement (min closed-loop gain = 5), and D-package SOIC-8 thermal performance across extended temperature operation.

Technical Context

The TLE2161ID uses TI's Excalibur JFET process to achieve parametric stability over time and temperature while maintaining fast transient response. Its decompensated architecture requires minimum closed-loop gain of 5 for stability, distinguishing it from unity-gain-stable op-amps.

It features dual offset-null pins (pins 1 and 8) for precision trimming, rail-to-rail input common-mode range (±11 V to ±13 V at ±15 V supplies), and robust output drive capability - delivering ±80 mA short-circuit current and sustaining ±12.5 V into 600 Ω with <0.025% THD at 10 kHz.

Key Specifications

Pinout & Package

Package: SOIC-8 (D package), surface-mount, 150 mil width, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE2161CP and OPA2134PA, the TLE2161ID uniquely combines industrial temperature qualification, factory-trimmed low offset, offset-null pins for field calibration, and decompensated high-speed performance - making it optimal for precision, long-life, wide-temperature analog signal chains where stability at gain ≥5 is acceptable.

Availability

TLE2161ID is available at Aetrix Electronics and suitable for industrial sensor interfaces, precision data acquisition front-ends, and high-reliability active filter designs requiring stable component supply across extended temperature ranges.

Supply support for TLE2161ID 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 connectivity technologies with decades of op-amp innovation.

The TLE2161 family belongs to TI's Excalibur precision op-amp product line, engineered for high dc accuracy, low drift, and robust output drive in demanding industrial and instrumentation applications.

FAQ

What is the minimum closed-loop gain required for stable operation of the TLE2161ID?

The TLE2161ID is decompensated and requires a minimum closed-loop gain of 5 for stable operation. This is explicitly specified in the datasheet to ensure adequate phase margin (>70°) and prevent oscillation. Using it at unity gain or gain <5 without external compensation risks instability and sustained ringing in the output.

Does the TLE2161ID support rail-to-rail input or output operation?

The TLE2161ID does not support rail-to-rail input or output. Its common-mode input voltage range is –11 V to +13 V at ±15 V supplies (i.e., 2 V below VCC– and 2 V below VCC+), and its output swing is typically ±12.5 V into 600 Ω - not reaching the supply rails. Full rail-to-rail capability is absent in this Excalibur JFET architecture.

Can the offset-null pins of the TLE2161ID be left unconnected?

No - the offset-null pins (1 and 8) must be either connected to a 10-kΩ potentiometer for trimming or tied to appropriate fixed voltages per the datasheet configuration. Leaving them floating may cause unpredictable offset behavior or increased drift. The TLE2161ID's specified 500 µV max offset assumes proper nulling circuit implementation.

What is the maximum power dissipation of the TLE2161ID in SOIC-8 package at 85°C ambient?

Per the Dissipation Rating Table, the TLE2161ID (SOIC-8/D package) has a power rating of 377 mW at TA = 70°C and 377 mW at TA = 85°C (derated from 464 mW at 25°C using 5.8 mW/°C). Exceeding this limit risks thermal shutdown or accelerated parametric shift, especially given its 125°C max junction temperature rating.

How does the TLE2161ID's input bias current compare to bipolar-input op-amps in similar packages?

The TLE2161ID's 5 pA typical input bias current is over six orders of magnitude lower than typical bipolar-input op-amps (e.g., LM741: ~80 nA). This JFET-input characteristic makes the TLE2161ID suitable for ultra-high-impedance sources like pH electrodes or piezoelectric sensors, where even nanoampere-level bias currents would introduce significant voltage errors.