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Texas Instruments OPA4187IRUMT
- Part No.:
- OPA4187IRUMT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
OPA4187IRUMT.pdf
- Description:
- IC OPAMP ZER-DRIFT 4CIRC 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,367
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Product details
Overview
OPA4187IRUMT 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 - enabling high-accuracy current sensing, pH/gas transducer interfaces, and analog input modules.
For engineers reviewing the OPA4187IRUMT datasheet, OPA4187IRUMT pinout, OPA4187IRUMT application, or OPA4187IRUMT equivalent, this page provides verified specifications, WQFN-16 package terminal mapping, real-world use cases in process analytics and transmitter design, and validated alternative options for precision op-amp selection.
Technical Context
The OPA4187IRUMT employs auto-zeroing with chopper-stabilized front-end and notch-filtered architecture to achieve near-zero long-term drift and sub-µV initial offset. Its input stage includes EMI filtering and rail-to-rail common-mode range extending to the negative rail, supporting single-supply operation down to 4.5 V total supply.
Each of its four amplifiers features 550 kHz gain-bandwidth product, 0.2 V/µs slew rate, and 140 dB CMRR at ±18 V - enabling stable unity-gain configurations in high-impedance sensor front-ends while maintaining 100 mV output swing into 10 kΩ loads over –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV max - enables <1 LSB error in 16-bit DAQ systems without calibration |
| Offset Drift | 0.001 µV/°C - ensures <0.1 µV total drift over full –40°C to +125°C industrial range |
| Supply Range | ±2.25 V to ±18 V (4.5–36 V total) - supports both low-power battery and high-voltage industrial rails |
| Quiescent Current | 100 µA per amplifier - allows four-channel precision amplification within 400 µA total system budget |
| CMRR / PSRR | 140 dB / 160 dB - rejects >100 dB of power-supply and common-mode interference in noisy plant environments |
| Output Swing | 15 mV from rail (no load), 100 mV from rail (10 kΩ load) - preserves dynamic range in rail-to-rail ADC interfaces |
| Gain-Bandwidth | 550 kHz - sufficient for anti-aliasing and sensor signal conditioning up to ~50 kHz closed-loop bandwidth |
Pinout & Package
OPA4187IRUMT is housed in a 4.00 mm × 4.00 mm, 16-pin WQFN package with exposed thermal pad (RUM suffix), rated for –40°C to +125°C operation and optimized for low-inductance PCB layout in space-constrained industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives high-impedance loads with rail-to-rail swing; requires local 0.1 µF decoupling |
| 2 | –IN A | Inverting input, channel A - connects to feedback network or current-sense shunt resistor |
| 3 | V+ | Positive supply - must be decoupled to GND with 0.1 µF ceramic capacitor adjacent to pin |
| 4 | –IN B | Inverting input, channel B - electrically isolated from other channels; supports independent sensor inputs |
| 5 | +IN B | Non-inverting input, channel B - accepts signals down to negative rail; used for reference or sensor bias |
| 6 | OUT B | Amplifier B output - shares same thermal and noise characteristics as OUT A; no crosstalk above –100 dB @ 1 kHz |
| 7 | OUT C | Amplifier C output - identical performance to OUT A/B; enables multi-channel analog front-end integration |
| 8 | –IN C | Inverting input, channel C - supports differential or single-ended configurations per channel |
| 9 | +IN C | Non-inverting input, channel C - referenced to same ground as all channels; no internal isolation |
| 10 | V– | Negative supply - return path for all four amplifiers; connects to system ground or negative rail |
| 11 | +IN D | Non-inverting input, channel D - supports fourth independent signal path in compact 4-mm² footprint |
| 12 | –IN D | Inverting input, channel D - matches input bias current (±100 pA typ) and impedance across all channels |
| 13 | NC | No connection - internally unconnected; must remain floating or tied to GND per layout guidelines |
| 14 | OUT D | Amplifier D output - fully specified for 100 mV rail margin into 10 kΩ at +125°C |
| 15 | NC | No connection - thermally connected to die paddle; may be soldered to PCB thermal pad |
| 16 | NC | No connection - electrically isolated; serves as mechanical anchor and thermal conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zeroing + chopper stabilization eliminates aging and temperature-induced offset drift below 0.001 µV/°C |
| Rail-to-rail output | Swings within 15 mV of supply rails under no load - maximizes usable dynamic range for 3.3 V or 5 V ADCs |
| EMI filtered inputs | Integrated RF rejection on IN+ and IN– pins suppresses >80 dB of 900 MHz cellular interference in factory settings |
| Low quiescent current | 100 µA per amplifier enables always-on sensor monitoring in battery-powered field instruments |
| Input includes negative rail | Common-mode range extends to V– - supports single-supply operation with grounded sensor references |
| High open-loop gain | 160 dB AOL ensures <0.001% gain error in precision instrumentation amplifier configurations |
Applications
| Pressure Transmitter | Flow Transmitter |
|---|---|
|
Use Scenario: Amplifies mV-level bridge output from piezoresistive pressure sensors in hazardous-area loop-powered transmitters. IC Role / Device Role / Timing Role: Precision instrumentation front-end with 4-channel parallel signal conditioning for dual-sensor redundancy and diagnostics. Use Value: 10 µV offset and 0.001 µV/°C drift ensure ≤0.1% FS error over –40°C to +85°C ambient without recalibration. |
Use Scenario: Conditions differential voltage from magnetic flow meter electrodes in water/wastewater treatment plants. IC Role / Device Role / Timing Role: Low-noise, low-drift transimpedance and level-shifting stage before 24-bit sigma-delta ADC. Use Value: 15 nV/√Hz noise and 140 dB CMRR reject 50/60 Hz mains pickup and pipeline vibration artifacts. |
| Analog Input Module | Process Analytics (pH/Gas) |
|
Use Scenario: Four-channel signal conditioner in PLC I/O modules accepting 0–10 V, ±10 V, and 4–20 mA inputs. IC Role / Device Role / Timing Role: Quad op-amp providing simultaneous gain, filtering, and buffer functions per channel in SO-14 or TSSOP-14 footprints. Use Value: 100 µA per amplifier enables 16-channel module design with <2 mA total analog section quiescent draw. |
Use Scenario: Front-end amplifier for electrochemical pH electrodes and NDIR gas sensor detectors in portable analyzers. IC Role / Device Role / Timing Role: Ultra-low-input-bias-current (100 pA typ) buffer protecting high-impedance sensor outputs from loading. Use Value: Input bias current <100 pA prevents >1 mV error in 10 MΩ electrode circuits - critical for sub-0.01 pH resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4182IDR | Higher 5.5 MHz GBW, 2.5 V/µs slew rate; 220 µA IQ; no EMI filtering | Better for higher-frequency sensor excitation (e.g., ultrasonic); less suited for ultra-low-power battery operation | Select when bandwidth >500 kHz is required and supply current <100 µA is not mandatory |
| LTC2057HMS8#PBF | Lower 0.5 µV max VOS, 0.005 µV/°C drift; 1.1 mA IQ; SO-8 package only | Superior DC precision but 11× higher quiescent current limits use in multi-channel or battery systems | Select only for single-channel, mains-powered applications demanding sub-1 µV offset stability |
Compared with OPA4187IRUMT, OPA4182IDR trades ultra-low power for higher speed, while LTC2057HMS8#PBF sacrifices efficiency for marginal DC accuracy - making OPA4187IRUMT optimal for space- and power-constrained industrial multi-channel signal chains.
Availability
OPA4187IRUMT is available at Aetrix Electronics and suitable for analog input modules, pressure transmitters, and process analytics equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4187IRUMT 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 for industrial, automotive, and personal electronics markets.
The OPAx187 series was designed specifically for high-precision, low-power industrial sensing - targeting applications where long-term offset stability, rail-to-rail operation, and EMI robustness outweigh raw speed or cost sensitivity.
FAQ
What is the maximum operating temperature for the OPA4187IRUMT?
The OPA4187IRUMT is fully specified from –40°C to +125°C ambient temperature. Its WQFN-16 package achieves 35.3°C/W junction-to-ambient thermal resistance, enabling reliable operation at full rating in sealed enclosures with minimal airflow - critical for field-mounted pressure and flow transmitters.
Does the OPA4187IRUMT support single-supply operation?
Yes, the OPA4187IRUMT 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 to within 15 mV of either rail - allowing direct interfacing with 3.3 V or 5 V microcontrollers and ADCs without level-shifting circuitry.
How does the auto-zeroing architecture affect OPA4187IRUMT's noise performance?
The OPA4187IRUMT's combined auto-zeroing and chopper architecture yields 0.4 µVPP (0.1–10 Hz) and 15 nV/√Hz (1 kHz) input voltage noise - lower than most pure chopper amps. The notch filter suppresses switching artifacts, ensuring clean spectral density without spurs that could alias into measurement bands.
Can the OPA4187IRUMT drive capacitive loads directly?
The OPA4187IRUMT is stable driving ≥100 pF loads in unity-gain configuration. For >100 pF (e.g., long cables or ADC input caps), a 25 Ω isolation resistor in series with the output restores phase margin - demonstrated in Figure 22 of the SBOS807E datasheet with <5% overshoot at 100 pF.
Is the OPA4187IRUMT pin-compatible with other OPAx187 variants?
No - the OPA4187IRUMT (WQFN-16) has different pin count and layout than OPA4187D (SOIC-14) and OPA4187PW (TSSOP-14). While electrical specs are identical across packages, PCB redesign is required when substituting RUM for D or PW variants due to incompatible land patterns and thermal pad requirements.
OPA4187IRUMT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 16-WQFN Exposed Pad
- 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:
- 16-WQFN (4x4)
OPA4187IRUMT FAQ
1.How can I place an order for OPA4187IRUMT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4187IRUMT 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 OPA4187IRUMT reliable?
The price and inventory of OPA4187IRUMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4187IRUMT is usually 5 days.
3.What payment methods are accepted for OPA4187IRUMT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4187IRUMT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4187IRUMT?
OPA4187IRUMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4187IRUMT 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 OPA4187IRUMT?
For technical support, including OPA4187IRUMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4187IRUMT requirements.
6.How does Aetrix verify that OPA4187IRUMT is sourced from the original manufacturer or authorized distributors?
All OPA4187IRUMT 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 OPA4187IRUMT meets industry standards.
7.What is the process for return or replacement of OPA4187IRUMT?
All OPA4187IRUMT units undergo pre-shipment inspection (PSI). If there is an issue with OPA4187IRUMT, 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 OPA4187IRUMT part is unused and in its original packaging.
Return procedure for OPA4187IRUMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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