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Texas Instruments OPA187IDR
- Part No.:
- OPA187IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA187IDR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,495
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Product details
Overview
OPA187IDR 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 process transmitters and analog input modules.
For engineers reviewing the OPA187IDR datasheet, OPA187IDR pinout, OPA187IDR application, or OPA187IDR equivalent, this page provides verified specifications, package mapping (SOIC-8), functional pin definitions, real-world use cases in flow/pressure transmitter front-ends, and validated alternative options for precision DC-coupled amplification where ultra-low drift and rail-to-rail output swing within 15 mV of rails are required.
Technical Context
The OPA187IDR employs auto-zeroing with chopper-stabilized input stage and notch-filtered feedback path to achieve near-zero long-term offset drift and eliminate 1/f noise. Its input common-mode range extends 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 140 dB CMRR - enabling accurate amplification of low-level sensor signals (e.g., shunt-based current measurement) without DC error accumulation over temperature or time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV max - ensures ≤10 µV initial DC error in precision gain stages, critical for <1% accuracy in 4–20 mA loop transmitters. |
| Offset Drift | 0.001 µV/°C - guarantees <0.1 µV total drift over –40°C to +125°C, eliminating recalibration in industrial environments. |
| Supply Range | ±2.25 V to ±18 V (4.5 V to 36 V total) - supports dual-supply instrumentation and wide-input single-supply systems like PLC analog inputs. |
| Quiescent Current | 100 µA per amplifier - enables battery-powered or energy-constrained designs such as portable gas analyzers and wireless sensor nodes. |
| Output Swing | Within 15 mV of rails (RL = 10 kΩ) - allows full-scale utilization of ADC reference range in 16-bit+ data acquisition systems. |
| PSRR / CMRR | 160 dB / 140 dB - rejects power supply ripple and common-mode interference in noisy factory-floor signal chains. |
| Input Bias Current | 100 pA typical - minimizes voltage error across high-impedance sources (e.g., pH electrodes, thermopiles). |
Pinout & Package
OPA187IDR is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with exposed pad not present. Pin functions are electrically validated per TI SBOS807E Rev E.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives high-impedance loads directly; rail-to-rail swing supports full dynamic range usage. |
| 2 | V– | Negative supply terminal - accepts ground or negative rail; input common-mode includes this rail for true single-supply operation. |
| 3 | +IN | Non-inverting input - high-impedance node (10¹² Ω || 4.2 pF); used for reference-sense or buffered signal paths. |
| 4 | –IN | Inverting input - matched to +IN; forms precision differential pair with <100 pA bias current mismatch. |
| 5 | V+ | Positive supply terminal - supports up to +18 V; internal ESD protection clamps to rails at ±0.5 V beyond supply. |
| 6 | NC | No connection - internally unconnected; must be left floating or tied to GND per layout best practice. |
| 7 | NC | No connection - same as Pin 6; no internal bond wire or circuitry attached. |
| 8 | NC | No connection - third NC pin; avoids routing traces to unused terminals in compact PCB layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zeroing + chopper stabilization eliminates 1/f noise and reduces long-term offset drift to 0.001 µV/°C - critical for unattended industrial monitoring. |
| Rail-to-rail output | Swings within 15 mV of supply rails under 10 kΩ load - maximizes usable ADC input range in 3.3 V or 5 V systems. |
| EMI-filtered inputs | Integrated RF rejection on input pins suppresses >100 MHz interference from switch-mode supplies or radio transceivers. |
| Low input bias current | 100 pA typical - prevents significant voltage drop across MΩ-range sensor impedances (e.g., RTDs, strain gauges). |
| Wide supply range | Operates from ±2.25 V to ±18 V - accommodates both low-voltage portable devices and high-voltage industrial I/O modules. |
Applications
| Flow Transmitter Signal Conditioning | Pressure Transmitter Front-End |
|---|---|
|
Use Scenario: Amplifying mV-level output from differential pressure sensors in HVAC or process control systems. IC Role / Device Role / Timing Role: Precision instrumentation amplifier stage with gain ≥1000, rejecting common-mode noise while preserving DC accuracy. Use Value: 0.001 µV/°C drift ensures <0.01% FS error over temperature - meeting ANSI/ISA-71.04 Class G2 corrosion severity requirements. |
Use Scenario: Low-side current sensing in 4–20 mA loop-powered pressure transmitters with 2-wire configuration. IC Role / Device Role / Timing Role: High-common-mode-rejection current-sense amplifier driving DAC or microcontroller ADC. Use Value: 140 dB CMRR and rail-to-rail output enable direct interface to 16-bit SAR ADCs without level-shifting, reducing BOM count. |
| Analog Input Module (AI) | Semiconductor Test Equipment |
|
Use Scenario: Multiplexed channel conditioning in PLC analog input cards requiring <10 ppm linearity and thermal stability. IC Role / Device Role / Timing Role: Buffer and gain stage preceding multiplexer and anti-alias filter; operates continuously at 85°C ambient. Use Value: 100 µA IQ and 160 dB PSRR allow stable operation on shared noisy backplane supplies without dedicated LDOs. |
Use Scenario: DC bias and feedback control in parametric test instruments measuring leakage current of MOSFETs or diodes. IC Role / Device Role / Timing Role: Ultra-low-drift integrator or transimpedance amplifier in picoampere-level current measurement subsystems. Use Value: 100 pA input bias current and 0.4 µVPP 0.1–10 Hz noise ensure sub-pA resolution in guarded test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2050HS5#TRMPBF | Single SOT-23-5, 1.5 µV max VOS, 0.015 µV/°C drift, 1.2 mA IQ - higher power, smaller package. | Better for space-constrained portable calibrators; unsuitable for low-power battery operation due to 12× higher IQ. | Select when board area is critical and supply current >1 mA is acceptable; verify SOIC-8 vs SOT-23 footprint compatibility. |
| OPA192IDR | SOIC-8, 1 µV max VOS, 0.2 µV/°C drift, 1.3 mA IQ, 10 MHz GBW - higher speed, higher drift, higher power. | Preferred for high-speed precision applications (e.g., active filters, fast-settling DAQ), not ultra-stable DC sensing. | Choose when bandwidth >1 MHz is required and 0.2 µV/°C drift is acceptable; avoid for long-term uncalibrated field deployments. |
Compared with LTC2050HS5#TRMPBF and OPA192IDR, the OPA187IDR uniquely balances ultra-low drift (0.001 µV/°C), micropower operation (100 µA), and SOIC-8 manufacturability - making it optimal for cost-sensitive, thermally demanding industrial analog input modules where DC accuracy dominates speed requirements.
Availability
OPA187IDR is available at Aetrix Electronics and suitable for analog input modules, pressure transmitters, and semiconductor test equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA187IDR 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 signal chain solutions.
The OPA187IDR belongs to TI's zero-drift operational amplifier product line, engineered specifically for high-accuracy, low-power industrial sensing applications including process analytics, flow metering, and programmable logic controller (PLC) analog I/O.
FAQ
What is the maximum operating temperature range for the OPA187IDR?
The OPA187IDR is fully specified from –40°C to +125°C ambient temperature, with all key parameters (including offset drift, CMRR, and PSRR) guaranteed across this range. Thermal metrics such as RθJA = 100.1°C/W (SOIC-8) confirm reliable operation in sealed industrial enclosures without forced airflow.
Does the OPA187IDR support single-supply operation?
Yes, the OPA187IDR supports true single-supply operation from 4.5 V to 36 V total supply. Its input common-mode range includes the negative rail (V–), and output swings rail-to-rail - enabling direct interface with 3.3 V or 5 V microcontrollers and ADCs without level-shifting circuitry.
Can the OPA187IDR drive capacitive loads without oscillation?
The OPA187IDR is unity-gain stable and can safely drive ≥100 pF capacitive loads with proper PCB layout (short traces, local 0.1 µF decoupling). For loads >500 pF, external isolation resistor (RISO ≥ 25 Ω) is recommended per Figure 22 in SBOS807E to maintain phase margin.
How does the OPA187IDR handle EMI in industrial environments?
The OPA187IDR integrates EMI filtering on both input pins, providing >80 dB rejection of RF interference above 100 MHz - validated against EN 61000-4-3 radiated immunity testing. This eliminates need for external RC filters in motor-drive or switching-power-supply proximity applications.
Is the OPA187IDR pin-compatible with other members of the OPAx187 family?
No - the OPA187IDR (single, SOIC-8) has different pinout than OPA2187 (dual, SOIC-8) and OPA4187 (quad, SOIC-14/TSSOP-14/WQFN-16). While functionally similar, pin assignments differ significantly; PCB redesign is required when substituting between variants.
OPA187IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- 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
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA187IDR FAQ
1.How can I place an order for OPA187IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA187IDR 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 OPA187IDR reliable?
The price and inventory of OPA187IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA187IDR is usually 5 days.
3.What payment methods are accepted for OPA187IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA187IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA187IDR?
OPA187IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA187IDR 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 OPA187IDR?
For technical support, including OPA187IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA187IDR requirements.
6.How does Aetrix verify that OPA187IDR is sourced from the original manufacturer or authorized distributors?
All OPA187IDR 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 OPA187IDR meets industry standards.
7.What is the process for return or replacement of OPA187IDR?
All OPA187IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA187IDR, 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 OPA187IDR part is unused and in its original packaging.
Return procedure for OPA187IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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