Texas Instruments OPA180ID

Overview

OPA180ID from Texas Instruments is a single-channel, zero-drift operational amplifier optimized for precision DC-coupled signal conditioning in high-accuracy sensor interfaces and industrial measurement systems. It delivers 75 μV maximum input offset voltage, 0.1 μV/°C drift, 10 nV/√Hz input voltage noise density at 1 kHz, rail-to-rail output swing within 250 mV of rails (RL = 10 kΩ), and operates from ±2 V to ±18 V supplies. It is widely used in strain gauge amplifiers and electronic scales requiring stable gain and minimal thermal error.

For engineers reviewing the OPA180ID datasheet, OPA180ID pinout, OPA180ID application, or OPA180ID equivalent, key selection considerations include its guaranteed 125°C operating temperature range, low 525 μA quiescent current per amplifier, 2 MHz gain-bandwidth product, 114 dB CMRR, and compatibility with single-supply (4–36 V) or dual-supply (±2–±18 V) configurations in space-constrained SOT-23-5 and SOIC-8 packages.

Technical Context

The OPA180ID implements TI's proprietary auto-zeroing architecture with chopper-stabilized front-end and notch-filtered correction path to achieve near-zero long-term drift and ultra-low 1/f noise. Its input stage includes RFI-filtered inputs and supports common-mode voltage down to the negative rail, enabling direct interfacing with grounded-sensor bridges.

This amplifier features a fully differential input stage with 10¹² Ω || 9.5 pF common-mode input impedance and 100 MΩ || 6 pF differential impedance, combined with 120 dB open-loop gain and 126 dB PSRR - enabling high-precision closed-loop performance even under supply ripple or noisy rail conditions.

Key Specifications

Pinout & Package

OPA180ID is available in SOIC-8 (D) package (4.90 mm × 3.91 mm body), rated for operation from –40°C to +125°C. Pin functions are validated per TI SBOS584E Rev E (June 2018).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA180ID, OPA188ID improves DC precision at the cost of 2.3× higher supply current, while OPA333AIDBVR reduces power by 97% but sacrifices bandwidth and supply flexibility - making OPA180ID the balanced choice for industrial 24 V systems needing 2 MHz response and 125°C operation.

Availability

OPA180ID is available at Aetrix Electronics and suitable for bridge amplifiers, strain gauge interfaces, and temperature measurement systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA180ID 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 expertise in precision amplifiers and signal chain solutions.

The OPAx180 family was designed specifically for high-stability, low-drift industrial sensing and test equipment - targeting applications where thermal drift, 1/f noise, and long-term calibration stability are primary constraints.

FAQ

What is the maximum operating temperature specification for OPA180ID?

The OPA180ID is specified for continuous operation from –40°C to +125°C, as confirmed in TI's SBOS584E Revision E (June 2018) datasheet Section 7.3. This extended range supports deployment in harsh industrial and automotive under-hood environments where ambient temperatures exceed 105°C. The device maintains all key parameters-including 75 μV max offset and 0.1 μV/°C drift-across this full range.

Does OPA180ID support single-supply operation?

Yes, OPA180ID supports true single-supply operation from 4 V to 36 V, with input common-mode range extending to the negative rail (V–) and rail-to-rail output swing. When powered from a single 5 V or 24 V rail, it can condition grounded-sensor signals (e.g., half-bridge strain gauges) without level-shifting circuitry - simplifying PCB layout and reducing component count in OPA180ID-based designs.

What package options are available for OPA180ID?

OPA180ID is offered exclusively in the SOIC-8 (D) package (4.90 mm × 3.91 mm), as documented in TI's Device Information table (SBOS584E p.3). Unlike the base OPA180 family-which includes SOT-23-5 and MSOP-8 variants-the "ID" suffix denotes the SOIC-8 variant qualified for the full –40°C to +125°C temperature range and marked with TI's standard D-package top-side marking.

How does the zero-drift architecture of OPA180ID reduce system-level calibration needs?

OPA180ID's auto-zeroing + chopper-stabilized architecture achieves 0.1 μV/°C offset drift and eliminates 1/f noise, reducing long-term drift to <12.5 μV over –40°C to +125°C. In electronic scale designs using OPA180ID, this enables ≤0.01% full-scale error without periodic hardware recalibration - significantly lowering maintenance cost and downtime in factory automation systems.

Is OPA180ID pin-compatible with other devices in the OPAx180 family?

No - OPA180ID (SOIC-8) is not pin-compatible with OPA180DBVR (SOT-23-5) or OPA180DGKR (MSOP-8), as each uses distinct pinouts and terminal counts. The SOIC-8 variant has two NC pins (pins 5 and 8) and dual power supply terminals (pins 4 and 7), whereas the SOT-23-5 version consolidates functionality into five pins. Layout reuse requires package-specific footprint design for OPA180ID.