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Texas Instruments OPA2187IDGKR
- Part No.:
- OPA2187IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2187IDGKR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,698
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Product details
Overview
OPA2187IDGKR from Texas Instruments is a dual-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 density at 1 kHz, 160 dB PSRR, and 140 dB CMRR across –40°C to +125°C. It operates from ±2.25 V to ±18 V supplies and supports analog input modules and industrial transmitters.
For engineers reviewing the OPA2187IDGKR datasheet, OPA2187IDGKR pinout, OPA2187IDGKR application, or OPA2187IDGKR equivalent, key selection criteria include ultra-low drift stability in temperature-varying environments, rail-to-rail output swing within 15 mV of rails under load, EMI-filtered inputs for noisy industrial settings, and microsize 8-pin VSSOP packaging for space-constrained PCB layouts.
Technical Context
The OPA2187IDGKR uses auto-zeroing and chopper-stabilized architecture to achieve near-zero input offset drift and eliminate 1/f noise-critical for DC-coupled, long-duration measurements. Its dual-channel design enables matched performance between amplifiers (e.g., for differential sensing or active filtering), with independent input common-mode range extending to the negative rail.
It features unity-gain stability, 550 kHz gain-bandwidth product, 0.2 V/µs slew rate, and 100 µA quiescent current per channel-enabling precision operation in battery-powered or thermally constrained systems without sacrificing AC response or DC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV max - ensures ≤0.1% error in 100-mV full-scale current-sense applications without calibration. |
| Offset Drift | 0.001 µV/°C - guarantees <10 nV total drift over –40°C to +125°C, enabling stable calibration over lifetime. |
| PSRR / CMRR | 160 dB / 140 dB - rejects >100 million:1 supply and common-mode interference, critical in shared-rail industrial systems. |
| Input Voltage Noise | 15 nV/√Hz @ 1 kHz - supports low-noise amplification of µV-level sensor outputs (e.g., strain gauges, RTDs). |
| Supply Range | ±2.25 V to ±18 V - accommodates both low-voltage portable designs and high-voltage industrial rails without level-shifting. |
| Output Swing | Within 15 mV of rails @ 10 kΩ - maximizes dynamic range in single-supply configurations with rail-referenced ADCs. |
| Quiescent Current | 100 µA per channel - enables always-on precision monitoring in energy-sensitive IoT and battery-backed systems. |
Pinout & Package
OPA2187IDGKR is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm, 0.65 mm pitch) with exposed thermal pad (DGK suffix). This thermally enhanced, surface-mount package supports high-density layout and improved power dissipation in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives feedback network or next-stage input; rail-to-rail capable up to 100 mA sink/source. |
| 2 | –IN A | Inverting input, Channel A - connects to shunt resistor low-side node in current-sense topologies. |
| 3 | +IN A | Non-inverting input, Channel A - referenced to system ground or precision bias; includes negative-rail capability. |
| 4 | V– | Negative supply rail - must be decoupled with 0.1 µF ceramic capacitor placed ≤2 mm from pin. |
| 5 | +IN B | Non-inverting input, Channel B - enables dual-function circuits (e.g., signal + reference buffer, differential pair). |
| 6 | –IN B | Inverting input, Channel B - supports matched gain stages or active filtering with identical drift tracking. |
| 7 | OUT B | Amplifier B output - independently configurable; shares same thermal and supply environment as OUT A for drift matching. |
| 8 | V+ | Positive supply rail - accepts up to +36 V total supply; requires local 0.1 µF bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and aging-induced offset drift - enables decade-long calibration intervals in flow meters and pressure sensors. |
| Rail-to-rail output | Swings within 15 mV of supply rails under 10-kΩ load - preserves full ADC input range in 3.3-V or 5-V microcontroller interfaces. |
| EMI-filtered inputs | Integrated RF rejection on input pins - maintains specified CMRR and offset accuracy in motor-drive or switching-power environments. |
| Negative-rail input capability | Common-mode range extends to V– - allows direct connection to grounded shunt resistors without level-shifting circuitry. |
| Low quiescent current | 100 µA per channel at ±18 V - supports continuous operation in 10-year battery-powered condition-monitoring nodes. |
Applications
| Industrial Analog Input Module | Low-Side Current Sensing |
|---|---|
Use Scenario: 4–20 mA loop-powered transmitter receiving thermocouple, RTD, or strain gauge signals in PLC backplanes. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and cold-junction compensation support. Use Value: 0.001 µV/°C drift ensures <0.01% FS error over full industrial temperature range without recalibration. |
Use Scenario: Monitoring motor phase current in servo drives using 1-mΩ shunt resistors at 50 A peak. IC Role / Device Role / Timing Role: Dual-channel difference amplifier for bidirectional current measurement with matched channel tracking. Use Value: 10 µV max offset enables accurate sub-10-mA resolution at 50-A full scale, even at elevated ambient temperatures. |
| Process Analytics Transmitter | Semiconductor Test Equipment |
Use Scenario: pH, gas, or humidity sensor signal conditioning in explosion-proof field housings with wide ambient swings. IC Role / Device Role / Timing Role: Low-noise, high-impedance buffer and filter stage preceding 24-bit delta-sigma ADC. Use Value: 15 nV/√Hz noise density and 10¹² Ω input impedance preserve weak electrochemical sensor signals without loading. |
Use Scenario: Bias voltage control and sense amplification in automated test equipment for IC parametric testing. IC Role / Device Role / Timing Role: Precision reference buffer and feedback amplifier in programmable current sources. Use Value: 160 dB PSRR prevents supply ripple from corrupting pA-level leakage current measurements during device characterization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182IDGKR | Lower 5.5 nV/√Hz noise, higher 1.8 MHz GBW, but 0.012 µV/°C drift (12× higher than OPA2187IDGKR) | Better for AC-coupled, bandwidth-critical sensor interfaces; less suitable for long-term DC stability requirements | Select when bandwidth >1 MHz is required and drift tolerance >0.01 µV/°C is acceptable |
| LTC2057HMS8#PBF | 0.5 µV max offset, 0.005 µV/°C drift, higher 1.6 mA IQ, SO-8 package only | Higher power consumption limits use in battery-operated devices; superior EMI immunity in RF-heavy environments | Choose for ultra-low offset in non-power-constrained test fixtures where EMI robustness is paramount |
Compared with OPA2187IDGKR, OPA2182IDGKR trades ultra-low drift for higher speed and lower noise, while LTC2057HMS8#PBF offers tighter initial offset at significantly higher quiescent current-making OPA2187IDGKR optimal for low-power, long-term DC precision in industrial field instruments.
Availability
OPA2187IDGKR is available at Aetrix Electronics and suitable for analog input modules, low-side current sensing, and process analytics transmitters requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2187IDGKR 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 delivering analog and embedded processing solutions, with deep expertise in precision signal chain design and industrial-grade reliability.
The OPAx187 series was engineered specifically for high-accuracy, low-drift industrial sensing-targeting applications where decades-long calibration stability, rail-to-rail operation, and low power coexist in harsh environments.
FAQ
What is the maximum operating temperature range for the OPA2187IDGKR?
The OPA2187IDGKR is fully specified from –40°C to +125°C ambient temperature. All key parameters-including offset voltage, drift, CMRR, and PSRR-are guaranteed across this range per the SBOS807E datasheet. Thermal derating is not required up to +125°C, and the VSSOP package's thermal metrics (RθJA = 159°C/W) support reliable operation in enclosed industrial enclosures without forced airflow.
Does the OPA2187IDGKR support single-supply operation?
Yes, the OPA2187IDGKR supports true single-supply operation from +4.5 V to +36 V. Its input common-mode range extends to the negative rail (V–), and its rail-to-rail output swings within 15 mV of both supply rails under load-enabling direct interfacing with 3.3-V or 5-V microcontrollers and ADCs without level-shifting circuitry. The device functions identically in single- or dual-supply configurations.
How does the zero-drift architecture of the OPA2187IDGKR improve long-term measurement stability?
The OPA2187IDGKR uses auto-zeroing and chopper stabilization to continuously correct input offset and eliminate 1/f noise. This reduces long-term drift to just 0.001 µV/°C-meaning total offset change remains below 10 nV over the full –40°C to +125°C range. In practice, this enables calibration intervals exceeding 10 years in static industrial sensors like pressure transmitters, where traditional op-amps would require annual recalibration.
Can the OPA2187IDGKR drive capacitive loads without instability?
The OPA2187IDGKR is unity-gain stable and can safely drive ≥100 pF capacitive loads without external compensation, as verified in Figure 22 of the SBOS807E datasheet. For loads >500 pF (e.g., long cables or ADC input capacitance), a small series isolation resistor (25–50 Ω) is recommended at the output to maintain phase margin. No internal compensation changes are needed-the device's architecture inherently supports moderate capacitive loading.
Is the OPA2187IDGKR pin-compatible with other devices in the OPAx187 family?
Yes-OPA2187IDGKR shares identical 8-pin VSSOP (DGK) pinout with OPA2187IDR (SOIC-8) and OPA2187AIDGKR (enhanced grade). However, it is not pin-compatible with the single-channel OPA187 or quad-channel OPA4187 due to differing channel counts and pin assignments. Board reuse is possible between OPA2187 variants, but not across channel-count families.
OPA2187IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- 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 (x2 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:
- 8-VSSOP
OPA2187IDGKR FAQ
1.How can I place an order for OPA2187IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2187IDGKR 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 OPA2187IDGKR reliable?
The price and inventory of OPA2187IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2187IDGKR is usually 5 days.
3.What payment methods are accepted for OPA2187IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2187IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2187IDGKR?
OPA2187IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2187IDGKR 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 OPA2187IDGKR?
For technical support, including OPA2187IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2187IDGKR requirements.
6.How does Aetrix verify that OPA2187IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2187IDGKR 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 OPA2187IDGKR meets industry standards.
7.What is the process for return or replacement of OPA2187IDGKR?
All OPA2187IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2187IDGKR, 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 OPA2187IDGKR part is unused and in its original packaging.
Return procedure for OPA2187IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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