Texas Instruments OPA388ID

Overview

OPA388ID from Texas Instruments is a precision zero-drift, zero-crossover, true rail-to-rail input/output operational amplifier in SOIC-8 package. It delivers ±0.25 µV offset voltage, ±0.005 µV/°C drift, 10 MHz gain bandwidth, 7.0 nV/√Hz noise at 1 kHz, and 2 µs settling to 0.01% - enabling high-fidelity signal conditioning in precision ADC driver and sensor front-end applications.

For engineers reviewing the OPA388ID datasheet, OPA388ID pinout, OPA388ID application, or OPA388ID equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for high-accuracy analog signal chains requiring ultra-low drift and true RRIO performance.

Technical Context

The OPA388ID implements auto-zeroing and chopper-stabilized architecture to eliminate 1/f noise and achieve near-zero input offset drift over temperature. Its zero-crossover design maintains 140-dB CMRR across full rail-to-rail common-mode range, avoiding output discontinuities during input transitions.

It supports single-supply operation from 2.5 V to 5.5 V and dual-supply from ±1.25 V to ±2.75 V, with EMI/RFI-filtered inputs and robust 4-kV HBM ESD rating. The device is specified over –40°C to +125°C and optimized for driving SAR and delta-sigma ADCs without linearity degradation.

Key Specifications

Pinout & Package

OPA388ID is housed in an 8-pin SOIC package (4.90 mm × 3.90 mm body size) with standard industry footprint and thermal characteristics (R_θJA = 116°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA333AIDR and LTC2057HMS8#PBF, the OPA388ID uniquely combines ultra-low drift, zero-crossover CMRR, EMI filtering, and 10-MHz bandwidth in a single SOIC-8 package - making it optimal for high-speed, high-accuracy industrial sensor interfaces where all three attributes are simultaneously required.

Availability

OPA388ID is available at Aetrix Electronics and suitable for merchant PSU monitoring, notebook adapter feedback loops, and laboratory instrumentation requiring stable component supply with guaranteed long-term availability.

Supply support for OPA388ID 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 innovation in precision signal chain components.

The OPAx388 family was designed specifically for high-resolution data acquisition systems - targeting applications demanding zero-drift stability, true rail-to-rail operation, and immunity to input crossover errors in ADC driver and sensor amplifier roles.

FAQ

What is the maximum operating temperature range for the OPA388ID?

The OPA388ID is fully specified over an industrial temperature range of –40°C to +125°C. All key parameters-including offset voltage drift (±0.005 µV/°C), CMRR (≥124 dB), and open-loop gain (≥120 dB)-are guaranteed across this full range, making it suitable for under-hood automotive sensors and industrial control modules where ambient temperatures exceed 85°C.

Does the OPA388ID support single-supply operation?

Yes, the OPA388ID supports true single-supply operation from 2.5 V to 5.5 V. Its rail-to-rail input and output stages allow full-swing signal handling even at 2.5 V, and its input common-mode range extends 0.1 V beyond both rails - enabling direct interfacing with low-voltage microcontrollers and 2.5-V ADCs without level-shifting circuitry.

How does the zero-crossover feature improve performance in the OPA388ID?

The zero-crossover architecture in the OPA388ID eliminates output discontinuities that occur in conventional zero-drift amplifiers when the input crosses mid-supply. This maintains 140-dB CMRR across the entire input common-mode range (from V– – 0.1 V to V+ + 0.1 V), ensuring consistent accuracy in high-gain, high-CMRR applications like instrumentation amplifiers and bridge sensor interfaces.

Can the OPA388ID drive capacitive loads directly?

The OPA388ID can drive up to 100 pF capacitive load with minimal overshoot (<10%) in unity-gain configuration, as verified in Figure 6-26 of the datasheet. For heavier loads (>100 pF), external isolation resistance (e.g., 10–50 Ω in series with output) is recommended to maintain stability - a common requirement when driving ADC input capacitance or long PCB traces.

What is the typical quiescent current of the OPA388ID at 5.5 V supply?

At VS = 5.5 V and TA = 25°C, the OPA388ID draws 1.9–2.6 mA per amplifier (typical 2.4 mA). This remains stable across temperature (–40°C to +125°C), enabling predictable power budgeting in battery-powered or thermally constrained designs such as handheld test equipment and remote sensor nodes.