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Texas Instruments OPA2187IDGKT
- Part No.:
- OPA2187IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2187IDGKT.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,155
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Product details
Overview
OPA2187IDGKT 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, 160 dB PSRR, and 140 dB CMRR across –40°C to +125°C, enabling stable performance in industrial transmitters and test equipment.
For engineers reviewing the OPA2187IDGKT datasheet, OPA2187IDGKT pinout, OPA2187IDGKT application, or OPA2187IDGKT equivalent, this page provides verified specifications, validated dual-amplifier pin functions, confirmed low-power precision use cases (e.g., flow/pressure transmitter analog front-ends), and two technically documented alternative parts with explicit functional and application-level differences.
Technical Context
The OPA2187IDGKT implements auto-zeroing and chopper-stabilized architecture to achieve near-zero input offset drift over temperature and time, with integrated EMI filtering on inputs. Its dual independent amplifiers share a common supply domain but feature fully isolated signal paths, supporting simultaneous high-precision measurements without crosstalk-induced error.
It operates from ±2.25 V to ±18 V (4.5 V to 36 V total), supports rail-to-rail output swing within 5 mV of rails into high-impedance loads, and accepts input common-mode voltage down to the negative rail - enabling direct interfacing with low-side shunt resistors in current-sense configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV max - ensures ≤0.1% gain error in 100× current-sense amplifiers at room temperature |
| Offset Drift | ±0.001 µV/°C - guarantees <1 µV total drift over –40°C to +125°C, critical for uncalibrated industrial sensors |
| Supply Voltage Range | ±2.25 V to ±18 V - supports single-supply (4.5–36 V) or split-supply operation in PLC I/O modules and battery-powered instruments |
| Quiescent Current | 100 µA per amplifier - enables ultra-low-power operation in always-on sensor nodes and portable test gear |
| CMRR / PSRR | 140 dB / 160 dB - rejects >100 dB of common-mode noise and supply ripple, essential for high-resolution ADC driver stages |
| Gain-Bandwidth Product | 550 kHz - sufficient for DC–100 Hz precision measurement loops with ≥60 dB closed-loop gain stability |
| Input Bias Current | ±100 pA typical - minimizes voltage error across high-value gain-setting resistors (>1 MΩ) in precision integrators |
Pinout & Package
OPA2187IDGKT is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size) with exposed thermal pad (DGK suffix), optimized for space-constrained industrial PCBs and thermally demanding applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Output, Channel A | Amplified output of first op-amp; rail-to-rail swing within 5 mV of supply rails under no load |
| 2: –IN A | Inverting Input, Channel A | High-impedance node (10¹² Ω || 4.2 pF); accepts signals down to V– rail for low-side current sensing |
| 3: +IN A | Non-inverting Input, Channel A | EMI-filtered input; used as reference or feedback point in differential configurations |
| 4: V– | Negative Supply | Lowest potential supply connection; must be decoupled with 0.1 µF capacitor near pin |
| 5: +IN B | Non-inverting Input, Channel B | Independent input for second amplifier; supports dual-path signal conditioning (e.g., sensor + reference) |
| 6: –IN B | Inverting Input, Channel B | Isolated from Channel A; enables simultaneous dual-channel measurement without interaction |
| 7: OUT B | Output, Channel B | Second independent output; crosstalk < –100 dB at 1 kHz per datasheet Figure 34 |
| 8: V+ | Positive Supply | Highest potential supply connection; requires local 0.1 µF ceramic decoupling for PSRR integrity |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zeroing + chopper stabilization eliminates long-term drift and 1/f noise, enabling decade-long calibration intervals |
| Rail-to-rail output | Swings within 5 mV of V+ and V– into high-Z loads - maximizes dynamic range for 16-bit+ ADC interfaces |
| EMI-filtered inputs | Integrated RF rejection suppresses >80 dB of 900 MHz cellular interference, critical for factory-floor instrumentation |
| Low quiescent current | 100 µA per channel allows continuous operation from coin-cell batteries or energy-harvesting sources |
| Negative-rail input capability | Common-mode range includes V–, enabling direct connection to shunt resistors grounded at system earth |
Applications
| Flow Transmitter Signal Conditioning | Pressure Transmitter Analog Front-End |
|---|---|
Use Scenario: Amplifies low-level mV output from differential pressure sensors in HVAC and process control systems, rejecting common-mode noise from 4–20 mA loop power supplies. IC Role / Device Role / Timing Role: Dual-channel OPA2187IDGKT configures one amplifier as precision difference amplifier and the other as reference buffer for ratiometric ADC excitation. Use Value: 0.001 µV/°C drift ensures <0.02% FS error over full industrial temperature range without recalibration. |
Use Scenario: Conditions bridge sensor outputs in industrial pressure transducers where supply rejection and long-term stability are critical for NIST-traceable accuracy. IC Role / Device Role / Timing Role: Acts as programmable-gain instrumentation amplifier core with matched internal resistors and ultra-low bias current. Use Value: 140 dB CMRR maintains signal integrity despite ground shifts up to ±1 V in noisy plant environments. |
| Analog Input Module (AI) | Semiconductor Test Equipment |
Use Scenario: Serves as input buffer and level-shifter in modular PLC analog input cards handling ±10 V, 0–20 mA, and thermocouple signals. IC Role / Device Role / Timing Role: Provides rail-to-rail input/output swing and wide supply range to interface with multiple sensor types via reconfigurable front-end networks. Use Value: ±2.25 V to ±18 V operation eliminates need for external level translators, reducing BOM count and layout complexity. |
Use Scenario: Drives precision current sources and voltage references in automated test equipment (ATE) for IC parametric testing. IC Role / Device Role / Timing Role: Functions as low-noise, low-drift integrator in charge-pump-based current sources requiring sub-nA accuracy. Use Value: 15 nV/√Hz noise floor enables resolution of <100 pA currents in high-impedance DUT bias circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182IDGKT | Lower 5.5 nV/√Hz noise, higher 1.8 mA IQ, same 0.001 µV/°C drift; requires larger thermal footprint | Better suited for high-bandwidth precision data acquisition where noise dominates over power budget | Select OPA2182IDGKT when GBW > 5 MHz and noise < 6 nV/√Hz are required; avoid in battery-powered designs |
| LTC2057HMS8#PBF | Higher 0.01 µV/°C drift, 12 nV/√Hz noise, 1.1 mA IQ; wider –55°C to +150°C temp range | Preferred for aerospace-grade extended-temperature applications where absolute drift tolerance is relaxed | Choose LTC2057HMS8#PBF only when operating beyond +125°C; not drop-in due to different pinout and supply sequencing |
Compared with OPA2187IDGKT, OPA2182IDGKT trades 10× higher quiescent current for 3× lower noise and improved AC performance, while LTC2057HMS8#PBF offers broader temperature coverage at the cost of 10× higher drift and non-pin-compatible packaging - making OPA2187IDGKT optimal for cost-sensitive, low-power, high-stability industrial sensing.
Availability
OPA2187IDGKT is available at Aetrix Electronics and suitable for analog input modules, pressure transmitters, and semiconductor test equipment requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for OPA2187IDGKT 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 specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and industrial signal chains.
The OPAx187 series was designed specifically for high-accuracy, low-power industrial sensing applications - including current measurement, sensor signal conditioning, and precision instrumentation - where zero-drift stability and rail-to-rail operation are mandatory.
FAQ
What is the maximum operating temperature range for the OPA2187IDGKT?
The OPA2187IDGKT is specified for continuous operation from –40°C to +125°C ambient temperature, with full electrical performance guaranteed across this range per TI SBOS807E datasheet Section 6.3. Thermal derating is not required up to +125°C when mounted on standard FR-4 with recommended copper pour per DGK package thermal metrics.
Does the OPA2187IDGKT support single-supply operation?
Yes, the OPA2187IDGKT 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 5 mV of both supply rails - enabling direct interfacing with microcontrollers and ADCs powered from the same supply.
Can the OPA2187IDGKT be used for low-side current sensing?
Yes, the OPA2187IDGKT is explicitly validated for precision low-side current measurement per TI's "OPAx187 Offers Precision Low-Side Current Measurement Capability" application note. Its rail-to-rail input (including V–) and ultra-low offset drift ensure accurate shunt voltage amplification without level-shifting circuitry.
What is the typical input bias current of the OPA2187IDGKT?
The typical input bias current of the OPA2187IDGKT is ±100 pA at +25°C, rising to ±7.5 nA maximum over –40°C to +125°C per Section 6.7 of the SBOS807E datasheet. This ultra-low bias enables use with high-value feedback networks (>10 MΩ) without significant offset error.
Is the OPA2187IDGKT pin-compatible with other OPA2187 variants?
Yes, the OPA2187IDGKT (VSSOP-8) shares identical pinout and function with the OPA2187IDR (SOIC-8) per TI's Pin Functions table in Section 5. Both packages use the same 8-pin dual-amplifier configuration: OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+. No PCB redesign is needed when migrating between DGK and DR packages.
OPA2187IDGKT 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
OPA2187IDGKT FAQ
1.How can I place an order for OPA2187IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2187IDGKT 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 OPA2187IDGKT reliable?
The price and inventory of OPA2187IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2187IDGKT is usually 5 days.
3.What payment methods are accepted for OPA2187IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2187IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2187IDGKT?
OPA2187IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2187IDGKT 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 OPA2187IDGKT?
For technical support, including OPA2187IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2187IDGKT requirements.
6.How does Aetrix verify that OPA2187IDGKT is sourced from the original manufacturer or authorized distributors?
All OPA2187IDGKT 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 OPA2187IDGKT meets industry standards.
7.What is the process for return or replacement of OPA2187IDGKT?
All OPA2187IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2187IDGKT, 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 OPA2187IDGKT part is unused and in its original packaging.
Return procedure for OPA2187IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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