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Texas Instruments OPA187ID
- Part No.:
- OPA187ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA187ID.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
OPA187ID 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, 160 dB PSRR, and 140 dB CMRR across –40°C to +125°C. It operates from ±2.25 V to ±18 V supply and supports analog input modules and industrial transmitters.
For engineers reviewing the OPA187ID datasheet, OPA187ID pinout, OPA187ID application, or OPA187ID equivalent, key selection considerations include ultra-low drift performance in low-power 36-V systems, rail-to-rail output swing within 5 mV of rails, negative-rail-inclusive input common-mode range, and microsize SOT-23/SOIC/VSSOP packaging for space-constrained designs.
Technical Context
The OPA187ID uses auto-zeroing and chopper-stabilized techniques to achieve near-zero input offset voltage drift over temperature and time, with integrated notch filtering to suppress switching artifacts. Its architecture enables stable DC precision without external calibration while maintaining unity-gain stability and low 100 µA quiescent current per amplifier.
It supports dual or single supply operation (4.5 V to 36 V), features EMI-filtered inputs, and provides rail-to-rail output drive into high-impedance loads. Input bias current remains at 100 pA (typical), enabling high-impedance sensor interfacing without significant error contribution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV max - ensures ≤10 µV initial error in precision gain stages without trimming |
| Offset Drift | 0.001 µV/°C - guarantees <0.1 µV total drift over full –40°C to +125°C range |
| Supply Voltage Range | ±2.25 V to ±18 V - supports wide industrial and automotive power rails including 24-V systems |
| Quiescent Current | 100 µA per amplifier - enables battery-powered or energy-sensitive applications |
| CMRR / PSRR | 140 dB / 160 dB - rejects >100 million-fold common-mode and supply noise in precision measurement |
| Input Voltage Noise | 15 nV/√Hz at 1 kHz - preserves SNR in low-level sensor amplification (e.g., strain gauges, RTDs) |
| Output Swing | Within 5 mV of rails (no load) - maximizes dynamic range in low-voltage, rail-referenced systems |
Pinout & Package
OPA187ID is available in SOIC-8 (D) package (4.90 mm × 3.91 mm), VSSOP-8 (DGK), and SOT-23-5 (DBV). The SOIC-8 variant is specified for –40°C to +125°C operation and features standard pinout compatible with industry-layout conventions.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives loads up to 10 kΩ with rail-to-rail swing and 30 mA short-circuit capability |
| 2 | V– | Negative supply terminal - accepts lowest system rail; input common-mode includes this node |
| 3 | +IN | Non-inverting input - high-impedance (10¹² Ω || 4.2 pF) node for reference or sensor signal routing |
| 4 | –IN | Inverting input - used for feedback or differential sensing; matched to +IN for CMRR optimization |
| 5 | V+ | Positive supply terminal - accepts highest system rail; supplies internal bias and output stage |
| 6–8 | NC | No connection - electrically isolated; may be left floating or grounded per layout best practices |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zeroing + chopper stabilization eliminates long-term offset drift and 1/f noise without external components |
| Rail-to-rail output | Swings within 5 mV of supply rails under no-load conditions, preserving full signal headroom in low-voltage systems |
| Negative-rail-inclusive input | Common-mode range extends to V– – 0.1 V, enabling direct interface with ground-referenced shunt resistors |
| EMI-filtered inputs | Integrated RF rejection improves immunity to GSM, Wi-Fi, and switching regulator noise in harsh environments |
| Low quiescent current | 100 µA per amplifier allows continuous operation in always-on sensor nodes and portable instrumentation |
Applications
| Industrial Analog Input Module | Pressure Transmitter Signal Conditioning |
|---|---|
Use Scenario: High-accuracy 4–20 mA loop-powered analog input module receiving signals from field sensors. IC Role / Device Role / Timing Role: Precision buffer and gain stage for conditioned sensor voltage before ADC sampling. Use Value: 0.001 µV/°C drift ensures <0.1 µV total offset shift over temperature, eliminating recalibration in factory-floor environments. |
Use Scenario: Signal conditioning front-end in a piezoresistive pressure sensor transmitter with 24-V supply. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier for bridge excitation and differential output amplification. Use Value: 15 nV/√Hz noise and 140 dB CMRR reject bridge imbalance and supply ripple, improving pressure resolution by ≥16-bit effective ENOB. |
| Flow Transmitter Current Sensing | Semiconductor Test Equipment |
Use Scenario: Low-side current sensing in electromagnetic flow meter transmitter using shunt resistor. IC Role / Device Role / Timing Role: Precision difference amplifier with G = 1000 for millivolt-level shunt voltage amplification. Use Value: Input includes negative rail and 10 µV max offset enable accurate sub-mA current detection without level-shifting circuitry. |
Use Scenario: Bias voltage control and feedback amplification in automated test equipment (ATE) source-measure units. IC Role / Device Role / Timing Role: Stable, low-drift integrator and reference buffer in precision current/voltage sourcing paths. Use Value: 160 dB PSRR prevents supply noise from modulating output accuracy during fast transient load switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA192ID | Higher bandwidth (10 MHz vs 0.55 MHz), higher IQ (1 mA), no zero-drift - trades drift performance for speed | Better suited for active filters or fast-settling multiplexed data acquisition, not ultra-stable DC sensing | Select when GBW > 1 MHz required and drift < 0.1 µV/°C is acceptable |
| LTC2057HMS8#PBF | Lower offset drift (0.00015 µV/°C), higher IQ (175 µA), wider supply (±1.65 V to ±18 V), different pinout | Superior drift spec for metrology-grade instruments; requires PCB redesign due to MSOP-8 footprint | Select only when sub-0.001 µV/°C drift is mandatory and layout change is feasible |
Compared with OPA187ID, OPA192ID offers 18× higher bandwidth but sacrifices zero-drift stability, while LTC2057HMS8#PBF achieves 6.7× lower drift at higher cost and non-compatible packaging - making OPA187ID the optimal balance of precision, power, and SOIC-8 compatibility for industrial sensing.
Availability
OPA187ID is available at Aetrix Electronics and suitable for industrial analog input modules, pressure transmitters, flow meter electronics, and semiconductor test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA187ID 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 OPA187ID belongs to TI's zero-drift OPAx187 series, designed specifically for high-accuracy, low-power, wide-supply industrial sensing and signal conditioning where long-term DC stability is critical.
FAQ
What is the maximum operating temperature range for the OPA187ID?
The OPA187ID is fully specified for operation from –40°C to +125°C ambient temperature. This extended range is validated across all electrical parameters in the datasheet, including offset voltage drift, CMRR, and quiescent current, making it suitable for under-hood automotive and industrial control cabinet applications where thermal stress is significant. The OPA187ID maintains its 0.001 µV/°C drift specification across this entire range.
Does the OPA187ID support single-supply operation?
Yes, the OPA187ID supports true single-supply operation from 4.5 V to 36 V. Its input common-mode range includes the negative rail (V–), and its rail-to-rail output swings within 5 mV of both supply rails under no-load conditions. This enables direct interfacing with ground-referenced sensors like shunt resistors in 3.3-V, 5-V, or 24-V systems without level-shifting circuitry - a key advantage confirmed in the device's Recommended Operating Conditions table.
What package options are available for the OPA187ID?
The OPA187ID is offered in three industry-standard packages: 8-pin SOIC (D), 8-pin VSSOP (DGK), and 5-pin SOT-23 (DBV). The "ID" suffix specifically denotes the SOIC-8 (D) variant, which measures 4.90 mm × 3.91 mm and is optimized for automated assembly and thermal reliability in industrial PCBs. Pin functions are identical across packages, with NC pins on SOIC-8 located at pins 1, 5, and 8.
How does the OPA187ID achieve its 0.001 µV/°C drift specification?
The OPA187ID achieves its ultra-low drift through a dual-stage auto-zeroing architecture combined with chopper stabilization and integrated notch filtering. This technique continuously corrects input offset voltage in real time, canceling both initial offset and thermally induced drift. Unlike conventional op-amps, this architecture eliminates 1/f noise and ensures drift remains bounded at ±0.001 µV/°C across –40°C to +125°C - a value verified in production testing and documented in Section 6.7 of the SBOS807E datasheet.
Can the OPA187ID drive capacitive loads without instability?
The OPA187ID is unity-gain stable and can safely drive moderate capacitive loads, but requires external isolation resistance (RISO) for loads >100 pF. Typical application curves (Figure 22) show overshoot increases beyond 50 pF without RISO; adding 25–50 Ω in series with the output restores stability. This behavior is inherent to its zero-drift topology and is explicitly characterized - no internal compensation adjustment is possible, so layout-aware design is essential for robust performance.
OPA187ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
OPA187ID FAQ
1.How can I place an order for OPA187ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA187ID 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 OPA187ID reliable?
The price and inventory of OPA187ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA187ID is usually 5 days.
3.What payment methods are accepted for OPA187ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA187ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA187ID?
OPA187ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA187ID 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 OPA187ID?
For technical support, including OPA187ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA187ID requirements.
6.How does Aetrix verify that OPA187ID is sourced from the original manufacturer or authorized distributors?
All OPA187ID 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 OPA187ID meets industry standards.
7.What is the process for return or replacement of OPA187ID?
All OPA187ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA187ID, 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 OPA187ID part is unused and in its original packaging.
Return procedure for OPA187ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA187ID Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM358ADR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902DR
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LM358P
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