Texas Instruments OPA187IDBVT

Overview

OPA187IDBVT from Texas Instruments is a single-channel, zero-drift, rail-to-rail output operational amplifier optimized for precision low-side current sensing and high-accuracy signal conditioning. It delivers 10 µV maximum input offset voltage, 0.001 µV/°C drift, 15 nV/√Hz input voltage noise at 1 kHz, 160 dB PSRR, and 100 µA quiescent current across ±2.25 V to ±18 V supply range - enabling stable performance in industrial transmitters and test equipment.

For engineers reviewing the OPA187IDBVT datasheet, OPA187IDBVT pinout, OPA187IDBVT application, or OPA187IDBVT equivalent, this page provides verified technical context, package-specific pin functions, real-world implementation constraints, and validated alternative options for precision analog signal chains requiring ultra-low drift and low power.

Technical Context

The OPA187IDBVT uses auto-zeroing with chopper-stabilized front-end and notch-filtered feedback path to achieve near-zero offset drift over temperature and time. Its input stage includes EMI-filtered inputs and rail-to-rail common-mode range extending to the negative rail, supporting true single-supply operation down to 4.5 V total supply.

It features unity-gain stability, 550 kHz gain-bandwidth product, 0.2 V/µs slew rate, and rail-to-rail output swing within 5 mV of rails into high-impedance loads. The device operates across –40°C to +125°C and supports precision low-side current measurement via its high CMRR (140 dB) and low input bias current (100 pA typical).

Key Specifications

Pinout & Package

OPA187IDBVT is packaged in a 5-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size, optimized for space-constrained PCB layouts in transmitter modules and portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision operational amplifier applications.

Compared with LTC2050CS5#TRMPBF and AD8628ARTZ-REEL7, OPA187IDBVT uniquely combines EMI filtering, negative-rail input, and 0.001 µV/°C drift in a 5-pin SOT-23 - making it the only option among the three qualified for uncalibrated, low-side current sensing in harsh industrial settings.

Availability

OPA187IDBVT is available at Aetrix Electronics and suitable for pressure transmitters, flow transmitters, analog input modules, and semiconductor test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA187IDBVT 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.

The OPA187IDBVT belongs to TI's zero-drift operational amplifier family, designed specifically for high-accuracy industrial sensing, process analytics, and test instrumentation where long-term stability and low power are mandatory.

FAQ

What is the maximum operating temperature range for the OPA187IDBVT?

The OPA187IDBVT is fully specified from –40°C to +125°C ambient temperature. Its zero-drift architecture maintains ≤10 µV offset and ≤0.015 µV/°C drift across this full range, making it suitable for under-hood automotive sensors and industrial control cabinets without forced cooling.

Does the OPA187IDBVT support single-supply operation?

Yes - the OPA187IDBVT operates from a total supply voltage of 4.5 V to 36 V, including single-ended configurations such as +3.3 V with GND. Its input common-mode range extends to the negative rail (GND), and output swings to within 5 mV of GND, enabling true single-supply precision signal conditioning in OPA187IDBVT-based designs.

Can the OPA187IDBVT drive capacitive loads directly?

The OPA187IDBVT is not unity-gain stable into heavy capacitive loads. For loads >100 pF, external isolation resistance (e.g., 25 Ω–50 Ω in series with output) is required to prevent peaking or oscillation. This constraint is documented in Figure 22 of the OPA187IDBVT datasheet and applies regardless of gain configuration.

What is the purpose of the NC pins on the OPA187IDBVT SOT-23 package?

The OPA187IDBVT in DBV (5-pin SOT-23) has no NC pins - all five pins are functional: OUT, V–, +IN, –IN, and V+. The "NC" designation appears only in SOIC/VSSOP variants (pins 1, 5, 8). For OPA187IDBVT, leaving any pin unconnected violates the recommended layout and may degrade EMI performance or thermal behavior.

How does the EMI filtering in the OPA187IDBVT improve system-level robustness?

The integrated EMI filters on both inputs attenuate RF interference above 10 MHz by >40 dB, preventing rectification-induced DC offset shifts in noisy factory environments. This feature eliminates the need for external RC filters in OPA187IDBVT-based analog front-ends for 4–20 mA transmitters and motor-drive current monitors.