Texas Instruments OPA2387DR

Overview

OPA2387DR from Texas Instruments is a dual-channel, ultra-high-precision zero-drift operational amplifier optimized for 16-bit to 24-bit analog-to-digital converter (ADC) front-ends. It delivers ±2 µV maximum input offset voltage, ±0.003 µV/°C drift, 5.7 MHz gain bandwidth, 8.5 nV/√Hz broadband noise, and operates from 1.7 V to 5.5 V single supply - enabling high-accuracy sensor signal conditioning in weigh scales and temperature transmitters.

For engineers reviewing the OPA2387DR datasheet, OPA2387DR pinout, OPA2387DR application, or OPA2387DR equivalent, this page provides verified electrical specifications, SOIC-8 package terminal mapping, real-world use cases in precision instrumentation, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The OPA2387DR implements proprietary auto-zeroing and chopper-stabilized architecture with internal clock filtering to eliminate 1/f noise (177 nVPP, 0.1 Hz–10 Hz) while maintaining flat bias current over temperature. Its rail-to-rail input extends ±100 mV beyond supply rails, and output swings within 5 mV of rails under no-load conditions.

This dual op amp achieves unity-gain stability with 40° phase margin at 100 pF capacitive load and supports low-noise, high-linearity operation across –40°C to +125°C industrial temperature range - critical for uncalibrated, long-term stable measurements in field-deployed instrumentation.

Key Specifications

Pinout & Package

OPA2387DR is packaged in an 8-pin SOIC (D package), with exposed pad not present. The device uses standard dual-op-amp pinout compatible with industry layout practices and thermal management via PCB copper pour under the body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2057HS8#PBF and AD8629ARZ, the OPA2387DR uniquely combines sub-µV offset, nano-Volt-per-degree drift, and 5.7 MHz bandwidth in a single SOIC-8 package - making it the only option among the three qualified for uncalibrated, high-resolution sensor front-ends operating continuously from –40°C to +125°C.

Availability

OPA2387DR is available at Aetrix Electronics and suitable for precision instrumentation, industrial process control, and medical sensor signal conditioning requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for OPA2387DR 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 signal-chain components.

The OPAx387 family was designed specifically for ultra-high-accuracy, low-drift analog front-ends in 16–24-bit data acquisition, sensor conditioning, and precision metrology - prioritizing long-term stability over raw speed or power efficiency.

FAQ

What is the maximum input common-mode voltage range for OPA2387DR?

The OPA2387DR supports rail-to-rail input with common-mode range extending ±100 mV beyond the supply rails. At VS = 5.5 V, this means (V–) – 0.2 V to (V+) + 0.1 V. This capability enables direct interfacing with unbuffered bridge sensors and eliminates need for external level-shifting circuitry in OPA2387DR-based designs.

Does OPA2387DR exhibit 1/f noise, and how is it mitigated?

No - the OPA2387DR has no measurable 1/f noise component, delivering 177 nVPP (0.1 Hz to 10 Hz) total input-referred noise. This is achieved through its proprietary zero-drift architecture that continuously corrects offset and low-frequency errors using internal clocked auto-zeroing, making OPA2387DR ideal for DC- and low-frequency precision applications.

What is the recommended supply decoupling for OPA2387DR in SOIC-8 package?

A minimum 100 nF ceramic capacitor placed within 5 mm of Pin 8 (V+) and Pin 4 (V–) is required for stable operation and EMI suppression. For high-precision layouts, add a parallel 10 nF C0G capacitor to improve high-frequency PSRR. The OPA2387DR's internal EMI filtering complements but does not replace proper board-level decoupling.

Can OPA2387DR drive ADC inputs directly without external buffering?

Yes - the OPA2387DR's rail-to-rail output swings within 5 mV of supply rails under no load and maintains >120 dB open-loop gain up to 150 mV from rails. When paired with SAR or sigma-delta ADCs having input capacitance ≤20 pF, OPA2387DR can drive directly; for higher-capacitance ADCs, a small series resistor (≤10 Ω) is recommended to ensure stability.

Is OPA2387DR specified for operation over the full –40°C to +125°C range?

Yes - all key parameters including input offset voltage (±2.5 µV max), offset drift (±0.012 µV/°C), input bias current (±200 pA max), and CMRR (110 dB min) are fully characterized and guaranteed across –40°C to +125°C. This makes OPA2387DR suitable for automotive under-hood, industrial motor control, and outdoor instrumentation where thermal stability is non-negotiable.