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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments OPA4187IDR

Name: OPA4187IDR
Brand: Texas Instruments
SKU: OPA4187IDR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: OPA4187IDR

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: OPA4187IDR.pdf

Description:: IC OPAMP ZERO-DRIFT 4CIRC 14SOIC

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Product details

Overview

OPA4187IDR from Texas Instruments is a quad-channel, zero-drift, rail-to-rail output operational amplifier optimized for precision low-voltage signal conditioning in industrial sensing and measurement systems. It delivers 10 µV maximum input offset voltage, 0.001 µV/°C drift, 15 nV/√Hz input voltage noise, 160 dB PSRR, and 100 µA quiescent current per amplifier across ±2.25 V to ±18 V supply range. It enables high-accuracy analog input modules and transmitter front-ends where long-term stability and low power are critical.

For engineers reviewing the OPA4187IDR datasheet, OPA4187IDR pinout, OPA4187IDR application, or OPA4187IDR equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases in process analytics and test equipment, and validated alternative options - all grounded in TI's SBOS807E production data sheet.

Technical Context

The OPA4187IDR uses auto-zeroing with chopper-stabilized architecture to achieve near-zero drift and ultra-low offset without external calibration. Its input stage includes EMI-filtered inputs and rail-to-rail common-mode range extending to the negative rail, enabling direct interfacing with low-side current-sense shunts and sensor bridges.

Each of its four independent amplifiers 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 supply rails into high-impedance loads - supporting precision DC-coupled gain stages and active filtering in multi-channel analog front-ends.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Offset Voltage	±10 µV max - ensures ≤0.01% gain error in 1000× instrumentation amplifier configurations at room temperature.
Offset Drift	±0.001 µV/°C - guarantees <100 nV total drift over –40°C to +125°C, eliminating recalibration in field-deployed transmitters.
Supply Range	±2.25 V to ±18 V (4.5–36 V total) - supports dual-supply industrial I/O modules and single-supply battery-powered portable test gear.
Quiescent Current	100 µA per amplifier - enables 4-channel precision amplification with <400 µA total I_Q, critical for always-on sensor nodes.
CMRR / PSRR	140 dB CMRR, 160 dB PSRR - rejects >100 dB of common-mode interference and supply ripple, essential for millivolt-level sensor signals.
Input Bias Current	±100 pA typical - preserves accuracy in high-impedance pH electrode and piezoresistive bridge interfaces without loading errors.
Output Swing	Within 5 mV of rails (no load), 100 mV (10 kΩ load) - maximizes dynamic range in 3.3 V or 5 V ADC-driven systems.

Pinout & Package

OPA4187IDR is packaged in a 14-pin SOIC (D package) with nominal body size 8.70 mm × 3.90 mm, rated for –40°C to +125°C operation.

Pin/Terminal	Circuit Role	Design Meaning
1	OUT A	Amplifier A output - drives downstream ADC input or filter stage; rail-to-rail capable up to 10 mA.
2	–IN A	Inverting input, channel A - connects to feedback network in inverting configuration or shunt resistor in current-sense applications.
3	+IN A	Non-inverting input, channel A - accepts high-impedance sensor signal (e.g., thermocouple, RTD bridge) with minimal bias current error.
4	V+	Positive supply rail - requires local 0.1 µF ceramic decoupling; supports up to +18 V.
5	+IN B	Non-inverting input, channel B - electrically isolated from channel A; used for differential pair or independent sensor channel.
6	–IN B	Inverting input, channel B - matches channel A performance; enables matched dual-path signal conditioning.
7	OUT B	Amplifier B output - synchronous with OUT A; supports time-aligned dual-channel acquisition.
8	OUT C	Amplifier C output - third independent output; allows three-signal monitoring (e.g., voltage, current, temperature).
9	–IN C	Inverting input, channel C - shares same layout-sensitive routing rules as other inverting inputs to minimize mismatch.
10	+IN C	Non-inverting input, channel C - identical electrical specs to +IN A/B/D; supports multi-sensor front-end consolidation.
11	V–	Negative supply rail - referenced to system ground in single-supply mode; must be decoupled locally.
12	+IN D	Non-inverting input, channel D - completes quad-channel set; enables full 4-channel analog input module on one IC.
13	–IN D	Inverting input, channel D - matches all other inverting inputs; no internal connection to pins 13 or 16 in SOIC package.
14	OUT D	Amplifier D output - final channel output; supports simultaneous sampling of four independent analog signals.

Key Features

Feature	Design Value
Zero-drift architecture	Eliminates thermal-induced offset drift in long-duration measurements - critical for flow and pressure transmitters requiring <0.1% FS stability over 10 years.
Rail-to-rail output	Delivers full-scale swing into 10 kΩ loads, preserving 99.5% of 3.3 V or 5 V ADC input range without level-shifting circuitry.
EMI-filtered inputs	Rejects >60 dB of RF interference at 900 MHz, preventing corruption of microvolt-level sensor outputs in noisy factory environments.
Low quiescent current	Enables 4-channel precision amplification at <400 µA total, supporting >10-year battery life in wireless condition-monitoring nodes.
Input includes negative rail	Allows direct connection to low-side shunt resistors without level-shifting, simplifying current-sense design in motor drives and power supplies.

Applications

Pressure Transmitter Front-End	Multi-Channel Analog Input Module
Use Scenario: Amplifies mV-level output from silicon piezoresistive pressure sensors in HVAC and industrial process control. IC Role / Device Role / Timing Role: Quad OPA4187IDR configures two channels as matched instrumentation amps for bridge excitation and differential sensing, while remaining channels condition temperature compensation signals. Use Value: 0.001 µV/°C drift ensures <0.05% FS error over –40°C to +85°C operating range, meeting IEC 61297 Class 0.1 accuracy requirements.	Use Scenario: Provides four independent, high-precision gain stages in PLC analog input cards accepting 0–10 V, ±10 V, 4–20 mA, and thermocouple inputs. IC Role / Device Role / Timing Role: Each amplifier handles one signal type with dedicated filtering and scaling; rail-to-rail output drives SAR ADCs directly. Use Value: 100 µA per channel enables 16-channel AI card with <2 mA total op-amp I_Q, reducing thermal load and power supply complexity.
Flow Transmitter Signal Chain	Process Analytics Sensor Interface
Use Scenario: Conditions low-level signals from electromagnetic flow meter electrodes in water/wastewater treatment plants. IC Role / Device Role / Timing Role: One channel performs low-noise pre-amplification (15 nV/√Hz), another implements 4–20 mA loop driver feedback, others handle diagnostics and temperature compensation. Use Value: 140 dB CMRR rejects common-mode noise from pump VFDs and grounding loops, maintaining ±0.2% reading accuracy in EMI-heavy environments.	Use Scenario: Interfaces with electrochemical pH, dissolved oxygen, and conductivity sensors in inline process analyzers. IC Role / Device Role / Timing Role: High-input-impedance (>10¹² Ω) non-inverting stages buffer fragile sensor outputs; zero-drift prevents baseline drift during 24/7 operation. Use Value: ±100 pA input bias current avoids polarization errors in high-impedance glass pH electrodes, ensuring stable calibration over weeks of continuous use.

Pressure Transmitter Front-End

Multi-Channel Analog Input Module

Use Scenario: Amplifies mV-level output from silicon piezoresistive pressure sensors in HVAC and industrial process control.

IC Role / Device Role / Timing Role: Quad OPA4187IDR configures two channels as matched instrumentation amps for bridge excitation and differential sensing, while remaining channels condition temperature compensation signals.

Use Value: 0.001 µV/°C drift ensures <0.05% FS error over –40°C to +85°C operating range, meeting IEC 61297 Class 0.1 accuracy requirements.

Use Scenario: Provides four independent, high-precision gain stages in PLC analog input cards accepting 0–10 V, ±10 V, 4–20 mA, and thermocouple inputs.

IC Role / Device Role / Timing Role: Each amplifier handles one signal type with dedicated filtering and scaling; rail-to-rail output drives SAR ADCs directly.

Use Value: 100 µA per channel enables 16-channel AI card with <2 mA total op-amp I_Q, reducing thermal load and power supply complexity.

Flow Transmitter Signal Chain

Process Analytics Sensor Interface

Use Scenario: Conditions low-level signals from electromagnetic flow meter electrodes in water/wastewater treatment plants.

IC Role / Device Role / Timing Role: One channel performs low-noise pre-amplification (15 nV/√Hz), another implements 4–20 mA loop driver feedback, others handle diagnostics and temperature compensation.

Use Value: 140 dB CMRR rejects common-mode noise from pump VFDs and grounding loops, maintaining ±0.2% reading accuracy in EMI-heavy environments.

Use Scenario: Interfaces with electrochemical pH, dissolved oxygen, and conductivity sensors in inline process analyzers.

IC Role / Device Role / Timing Role: High-input-impedance (>10¹² Ω) non-inverting stages buffer fragile sensor outputs; zero-drift prevents baseline drift during 24/7 operation.

Use Value: ±100 pA input bias current avoids polarization errors in high-impedance glass pH electrodes, ensuring stable calibration over weeks of continuous use.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
OPA4182IDR	Higher 5.5 MHz GBW but 0.3 µV/°C drift (300× higher than OPA4187IDR); 175 µA I_Q per amp.	Better for AC-coupled, bandwidth-critical applications (e.g., ultrasonic sensing); unsuitable for DC-stable long-term measurements.	Select OPA4182IDR only when bandwidth >1 MHz is required and drift tolerance >0.1 µV/°C is acceptable.
LTC2057HMS8#PBF	0.5 µV max V_OS, 0.015 µV/°C drift, 1.1 mA I_Q; 8-pin MSOP package limits channel count.	Superior noise (11 nV/√Hz) but 11× higher power; single-channel only - requires four ICs for quad functionality.	Choose LTC2057HMS8#PBF for ultra-low-noise single-channel designs where board space and power allow discrete quad implementation.

Compared with OPA4187IDR, OPA4182IDR trades ultra-low drift for higher speed and higher power, while LTC2057HMS8#PBF offers lower noise at significantly higher quiescent current and no integrated quad solution - making OPA4187IDR the optimal balance for multi-channel, low-power, DC-precision industrial signal chains.

Availability

OPA4187IDR is available at Aetrix Electronics and suitable for analog input modules, pressure transmitters, and process analytics systems requiring stable component supply, long-term calibration integrity, and extended temperature operation.

Supply support for OPA4187IDR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.

The OPAx187 series was designed specifically for high-accuracy, low-power industrial sensing - targeting applications where offset drift, EMI robustness, and rail-to-rail operation directly impact measurement reliability in harsh environments.

FAQ

What is the maximum operating temperature range for the OPA4187IDR?

The OPA4187IDR is specified for continuous operation from –40°C to +125°C ambient temperature, with full electrical performance guaranteed across this range per TI's SBOS807E datasheet. This makes it suitable for under-hood automotive sensors, industrial motor drives, and outdoor process instrumentation where thermal extremes are common. The SOIC package's thermal resistance (R_θJA = 83.8°C/W) supports reliable operation at maximum junction temperature under typical PCB layouts.

Does the OPA4187IDR support single-supply operation?

Yes, the OPA4187IDR supports true single-supply operation from 4.5 V to 36 V total supply (e.g., 3.3 V, 5 V, 12 V, or 24 V systems). Its input common-mode range extends to the negative rail (V–), and its rail-to-rail output swings within 5 mV of both supply rails - enabling direct interface with unipolar ADCs and microcontrollers without level-shifting circuitry. Decoupling capacitors must be placed close to V+ and V– pins per TI layout guidelines.

How does the OPA4187IDR achieve 0.001 µV/°C drift?

The OPA4187IDR achieves 0.001 µV/°C drift using an integrated auto-zeroing architecture with chopper stabilization and notch filtering, as shown in its functional block diagram (TI SBOS807E Figure 7.2). This continuously corrects input offset voltage in real time, eliminating thermal drift and 1/f noise without introducing switching artifacts - verified by production testing across –40°C to +125°C and documented in Figure 2 (Offset Voltage Drift Distribution) of the datasheet.

Can the OPA4187IDR drive capacitive loads?

The OPA4187IDR is not unity-gain stable into large capacitive loads; its typical small-signal overshoot exceeds 10% with >100 pF load (Figure 22, SBOS807E). For driving ADC input capacitors or cables, TI recommends adding a series isolation resistor (R_ISO = 25–50 Ω) between output and load. This maintains stability while preserving bandwidth - confirmed by measured settling time of 46 µs (0.1%) at G = +1 with 10-V step under ±18 V supply.

Is the OPA4187IDR pin-compatible with other OPAx187 variants?

No - the OPA4187IDR (14-pin SOIC) has a different pinout than the OPA187 (5-pin SOT-23 or 8-pin SOIC) or OPA2187 (8-pin SOIC/VSSOP). While all share identical electrical specifications, the quad version's 14-pin layout allocates dedicated pins for four independent +IN/–IN/OUT sets plus shared V+/V–, unlike the single/dual packages. Direct substitution requires PCB redesign; refer to Pin Functions table (Section 5, SBOS807E) for exact mapping.

OPA4187IDR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: Zero-Drift

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: Zero-Drift

Number of Circuits:: 4

Output Type:: Rail-to-Rail

Slew Rate:: 0.2V/µs

Gain Bandwidth Product:: 550 kHz

-3db Bandwidth:: -

Current - Input Bias:: 100 pA

Voltage - Input Offset:: 1 µV

Current - Supply:: 100µA (x4 Channels)

Current - Output / Channel:: 30 mA

Voltage - Supply Span (Min):: 4.5 V

Voltage - Supply Span (Max):: 36 V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

OPA4187IDR FAQ

1.How can I place an order for OPA4187IDR through Aetrix?

Please submit a Request for Quotation (RFQ) for OPA4187IDR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for OPA4187IDR reliable?

The price and inventory of OPA4187IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4187IDR is usually 5 days.

3.What payment methods are accepted for OPA4187IDR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4187IDR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for OPA4187IDR?

OPA4187IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your OPA4187IDR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for OPA4187IDR?

For technical support, including OPA4187IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4187IDR requirements.

6.How does Aetrix verify that OPA4187IDR is sourced from the original manufacturer or authorized distributors?

All OPA4187IDR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA4187IDR meets industry standards.

7.What is the process for return or replacement of OPA4187IDR?

All OPA4187IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4187IDR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The OPA4187IDR part is unused and in its original packaging.

Return procedure for OPA4187IDR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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