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Texas Instruments OPA2182ID
- Part No.:
- OPA2182ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2182ID.pdf
- Description:
- IC OPAMP
- Quantity:
- Payment:
- Shipping:
Inventory:1,684
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Product details
Overview
OPA2182ID from Texas Instruments is a dual-channel, zero-drift, rail-to-rail output precision operational amplifier optimized for high-accuracy signal conditioning in multichannel data acquisition systems. It delivers 4 µV maximum input offset voltage, 0.003 µV/°C drift, 5.7 nV/√Hz input voltage noise at 1 kHz, 5 MHz gain bandwidth, and 10 V/µs slew rate - enabling stable, low-error amplification of low-level sensor signals such as bridge outputs in weigh scales and strain gauges.
For engineers reviewing the OPA2182ID datasheet, OPA2182ID pinout, OPA2182ID application, or OPA2182ID equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for precision analog signal chains requiring dc stability, low noise, and MUX-friendly settling behavior.
Technical Context
The OPA2182ID implements a proprietary auto-zeroing architecture with ripple reduction technology to eliminate chopper-induced glitches while maintaining near-zero flicker noise and ultra-stable dc performance. Its MUX-friendly input stage prevents inrush current during large differential input transitions, critical for multiplexed sensor arrays.
It supports dual-supply (±2.25 V to ±18 V) or single-supply (4.5 V to 36 V) operation, features rail-to-rail output swing within 15 mV of rails (at no load), and includes EMI/RFI-filtered inputs plus phase-reversal protection - ensuring robustness in industrial environments with noisy power or transient-laden signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±4 µV max - enables sub-0.01% error in 100-mV full-scale bridge measurements without calibration. |
| Offset Drift | ±0.003 µV/°C - ensures <1 µV total drift over –40°C to +125°C, eliminating thermal nulling circuitry. |
| Gain Bandwidth | 5 MHz - supports stable closed-loop gain ≥100 at 50 kHz for anti-alias filtering in 100-kSPS DAQ systems. |
| Input Voltage Noise | 5.7 nV/√Hz @ 1 kHz - preserves SNR >110 dB for 20-bit ADC interfaces with 10-kΩ source impedances. |
| CMRR | 168 dB - rejects >99.99998% of common-mode interference from shared sensor excitation or ground loops. |
| Supply Range | ±2.25 V to ±18 V or 4.5 V to 36 V - interoperates with legacy ±15-V industrial rails and modern 24-V PLC backplanes. |
| Quiescent Current | 0.85 mA per amplifier - allows dual-channel precision amplification in battery-powered test equipment with <2 mW total dissipation. |
Pinout & Package
OPA2182ID is supplied in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, rated for operation from –40°C to +125°C and qualified for industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives downstream ADC driver or filter stage; rail-to-rail swing supports full-scale utilization of 16-/24-bit converters. |
| 2 | –IN A | Inverting input channel A - accepts feedback network; MUX-friendly architecture prevents current spikes when switching between high-impedance sensors. |
| 3 | +IN A | Noninverting input channel A - connects directly to low-noise sensor sources (e.g., Wheatstone bridge midpoints) with minimal bias current error (<1 nA). |
| 4 | V– | Negative supply - referenced to system ground in single-supply configs; must be decoupled with 0.1-µF ceramic capacitor per TI layout guidelines. |
| 5 | +IN B | Noninverting input channel B - isolated from channel A for independent dual-sensor conditioning (e.g., temperature-compensated load cell pairs). |
| 6 | –IN B | Inverting input channel B - supports matched feedback networks; crosstalk <120 dB at 10 kHz ensures channel isolation in time-multiplexed sampling. |
| 7 | OUT B | Amplifier B output - synchronous with OUT A for parallel dual-channel acquisition; identical AC/DC specs enable matched gain/phase response. |
| 8 | V+ | Positive supply - accepts up to 36 V; internal ESD protection (±4 kV HBM) safeguards against handling transients during PCB assembly. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-friendly input architecture | Eliminates input-stage inrush current during large differential voltage transitions - critical for fast-settling multichannel DAQ with >100 kSPS throughput. |
| Ripple reduction technology | Suppresses chopper clock feedthrough to <10 nVPP - avoids contamination of low-frequency sensor signals (e.g., 0.1–10 Hz weigh scale outputs). |
| Rail-to-rail output | Swings within 15 mV of supply rails at no load - maximizes dynamic range for 3.3-V or 5-V ADC reference voltages without level-shifting circuitry. |
| Controlled startup system | Rejects supply-rail inrush current during power-up - prevents false triggering in safety-critical monitoring circuits (e.g., battery overvoltage detection). |
| EMI/RFI filtered inputs | Integrated RF rejection improves immunity to 800-MHz–2.5-GHz cellular and Wi-Fi emissions - validated per IEC 61000-4-3 Level 3 testing. |
Applications
| Battery Test Equipment | Data Acquisition (DAQ) Systems |
|---|---|
Use Scenario: Precision measurement of open-circuit voltage and internal resistance during lithium-ion battery formation and aging tests. IC Role / Device Role / Timing Role: Dual-channel front-end amplifier conditioning differential voltage and current sense signals before 24-bit sigma-delta ADC conversion. Use Value: 4 µV offset and 0.003 µV/°C drift ensure <0.005% full-scale error across –20°C to +60°C ambient, eliminating recalibration between test cycles. | Use Scenario: Simultaneous acquisition of multiple low-level sensor outputs (e.g., thermocouples, RTDs, strain gauges) in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Channel-pair signal conditioner providing matched gain, offset, and settling behavior for time-interleaved sampling. Use Value: 1.7 µs to 0.01% settling on 10-V step enables >500 kSPS effective sample rate per channel with guaranteed monotonicity. |
| Weigh Scale Electronics | Flow Transmitter Signal Conditioning |
Use Scenario: Amplifying microvolt-level outputs from precision load cells in industrial platform scales and hopper weighing systems. IC Role / Device Role / Timing Role: Instrumentation-grade buffer and gain stage driving ratiometric ADCs referenced to the same excitation voltage. Use Value: 168 dB CMRR rejects common-mode noise from shared 5-V bridge excitation, maintaining 20-bit ENOB even with 10-m cable runs. | Use Scenario: Linearizing and amplifying low-amplitude signals from Coriolis or magnetic flow sensors in process automation transmitters. IC Role / Device Role / Timing Role: Dual-path signal conditioner supporting both primary flow measurement and diagnostic temperature compensation channels. Use Value: Ultra-low 0.12 µVPP 0.1-Hz to 10-Hz noise floor preserves resolution down to 0.01% of full-scale flow rate in 4–20 mA loop-powered designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189 | 0.4-µV offset (vs. 4 µV), 0.005-µV/°C drift, 5.2-nV/√Hz noise - tighter initial accuracy but higher cost. | Better suited for metrology-grade calibrators where <0.1 µV offset is mandatory; not required for industrial DAQ or weigh scale grade. | Select OPA2189 only if system-level calibration budget cannot absorb 4 µV offset; OPA2182ID offers optimal cost/performance for Class 0.02–0.05 systems. |
| OPA2188 | 6-µV offset, 0.03-µV/°C drift, 8.8-nV/√Hz noise - looser dc specs but lower quiescent current (0.55 mA). | Preferred for ultra-low-power portable test gear where <1 mW per channel is critical; trades dc precision for battery life. | Choose OPA2188 when operating from coin-cell batteries and 16-bit accuracy suffices; OPA2182ID is superior for fixed-power industrial applications demanding 20+ bit fidelity. |
Compared with OPA2189 and OPA2188, the OPA2182ID delivers the best balance of ultra-low drift (0.003 µV/°C), industry-leading CMRR (168 dB), and production-proven MUX-friendly settling - making it the preferred choice for cost-sensitive, high-channel-count precision DAQ where long-term stability outweighs marginal initial offset improvements.
Availability
OPA2182ID is available at Aetrix Electronics and suitable for battery test equipment, industrial data acquisition systems, and weigh scale electronics requiring stable component supply across extended temperature ranges and multi-year production lifecycles.
Supply support for OPA2182ID 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 signal chain solutions.
The OPAx182 product line was engineered specifically for high-accuracy, low-drift signal conditioning in industrial automation, test and measurement, and sensor interface applications - emphasizing dc stability, noise performance, and multichannel reliability.
FAQ
What is the maximum operating temperature range for the OPA2182ID?
The OPA2182ID is specified for continuous operation from –40°C to +125°C, with all key parameters (offset drift, CMRR, noise) guaranteed across this full industrial temperature range. Thermal metrics confirm RθJA = 108.1°C/W for the SOIC-8 package, enabling reliable performance in enclosed control cabinets without forced airflow.
Does the OPA2182ID require external compensation for unity-gain stability?
No, the OPA2182ID is internally compensated and unity-gain stable. It achieves 5 MHz gain bandwidth with 10 V/µs slew rate while maintaining phase margin >60° into 10-kΩ || 100-pF loads, as verified in Figure 7-9 and Figure 7-32 of the SBOS936E datasheet. No external compensation components are needed for standard configurations.
How does the MUX-friendly architecture of the OPA2182ID improve multichannel DAQ performance?
The OPA2182ID's MUX-friendly inputs eliminate inrush current during large differential input transitions - reducing settling time by up to 3× compared to standard zero-drift op amps when switching between high-impedance sensors. This enables faster channel scanning in DAQ systems without sacrificing accuracy or requiring guard-banding.
Can the OPA2182ID drive capacitive loads typical of ADC input buffers?
Yes, the OPA2182ID maintains stability driving ≥100 pF capacitive loads, as confirmed in Figure 7-25 and Figure 7-26 of the datasheet. For heavier loads (>500 pF), TI recommends adding a small series resistor (25 Ω) between the OPA2182ID output and the ADC input to preserve phase margin and prevent peaking.
What is the typical input bias current of the OPA2182ID, and how does it affect high-impedance sensor interfaces?
The OPA2182ID exhibits ±50 pA typical input bias current (±350 pA max), with ±140 pA typical input offset current. At 10-MΩ source impedance, this introduces <3.5 µV of additional offset error - negligible versus its 4-µV max VOS, making it ideal for interfacing with high-Z pH electrodes, piezoresistive sensors, and unbuffered thermocouples.
OPA2182ID 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:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 0.45 µV
- Current - Supply:
- 850µA (x2 Channels)
- Current - Output / Channel:
- 65 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-SOIC
OPA2182ID FAQ
1.How can I place an order for OPA2182ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2182ID 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 OPA2182ID reliable?
The price and inventory of OPA2182ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2182ID is usually 5 days.
3.What payment methods are accepted for OPA2182ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2182ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2182ID?
OPA2182ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2182ID 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 OPA2182ID?
For technical support, including OPA2182ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2182ID requirements.
6.How does Aetrix verify that OPA2182ID is sourced from the original manufacturer or authorized distributors?
All OPA2182ID 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 OPA2182ID meets industry standards.
7.What is the process for return or replacement of OPA2182ID?
All OPA2182ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2182ID, 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 OPA2182ID part is unused and in its original packaging.
Return procedure for OPA2182ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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