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Texas Instruments OPA182IDT
- Part No.:
- OPA182IDT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA182IDT.pdf
- Description:
- 36-V, 5-MHZ, SINGLE, LOW-NOISE,
- Quantity:
- Payment:
- Shipping:
Inventory:3,871
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Product details
Overview
OPA182IDT from Texas Instruments is a single-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 MUX-friendly inputs that suppress inrush current during channel switching - enabling stable performance in battery test equipment and weigh scale front-ends.
For engineers reviewing the OPA182IDT datasheet, OPA182IDT pinout, OPA182IDT application, or OPA182IDT equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions for the SOIC-8 package, application-specific implementation insights, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The OPA182IDT employs a proprietary auto-zeroing chopper-stabilized architecture with ripple reduction technology to achieve near-zero drift and eliminate 1/f noise while maintaining broadband performance. Its differential front end operates up to ±18 V supply, supports common-mode input down to the negative rail, and features controlled startup to suppress supply-rail inrush.
This architecture enables simultaneous high DC precision (168 dB CMRR, 170 dB open-loop gain) and fast dynamic response (10 V/µs slew rate, 1.7 µs settling to 0.01% for 10-V step), making it suitable for precision sensor interfaces where both long-term stability and multichannel throughput are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±4 µV max - ensures ≤0.0004% error in 1-V full-scale 16-bit DAQ systems without calibration. |
| Offset Drift | 0.003 µV/°C - contributes <0.3 µV total drift over –40°C to +125°C, enabling uncalibrated operation in industrial environments. |
| Gain Bandwidth | 5 MHz - supports stable closed-loop gain ≥100 at 50 kHz, sufficient for anti-alias filtering and fast sensor signal conditioning. |
| Input Voltage Noise | 5.7 nV/√Hz @ 1 kHz - dominates system noise floor in 10–100 kHz bandwidth applications like strain gauge amplification. |
| Supply Range | ±2.25 V to ±18 V (or 4.5 V to 36 V single) - allows direct interfacing with ±15 V legacy industrial rails or modern 24 V PLC analog I/O modules. |
| CMRR | 168 dB - rejects >63 million:1 common-mode interference, critical for low-level bridge sensor outputs in noisy factory settings. |
| Quiescent Current | 0.85 mA - enables low-power precision amplification in battery-operated test equipment with minimal thermal drift impact. |
Pinout & Package
OPA182IDT is packaged in an 8-pin SOIC (D) with 4.90 mm × 3.90 mm body size, rated for operation from –40°C to +125°C and compatible with standard surface-mount reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No connect | Internally unconnected; must be left floating or tied to ground per layout best practice - no routing required. |
| 2 | Inverting input | Differential input node; MUX-friendly architecture prevents current surge when switching between high-voltage channels. |
| 3 | Noninverting input | High-impedance input (60 TΩ || 2.3 pF); accepts signals down to V– rail, enabling true single-supply sensor biasing. |
| 4 | Negative supply | Accepts –2.25 V to –18 V; requires local 0.1-µF ceramic decoupling to minimize PSRR degradation above 10 kHz. |
| 5 | No connect | Internally unconnected; electrically isolated - no PCB trace or thermal pad connection needed. |
| 6 | Output | Rail-to-rail swing (within 15 mV of rails, no load); drives ≥10 kΩ loads with <0.00008% THD+N at 1 kHz. |
| 7 | Positive supply | Accepts +2.25 V to +18 V; dual decoupling (0.1 µF + 1 µF) recommended to suppress high-frequency supply noise coupling. |
| 8 | No connect | Internally unconnected; floating by default - no pull-up/down or signal routing required. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-friendly inputs | Eliminates input stage inrush current during multiplexer channel switching, preventing transient errors and reducing need for post-switching settling delay. |
| Rail-to-rail output | Delivers full dynamic range into 10-kΩ loads - maximizes ADC utilization in 16-bit+ data acquisition systems without level-shifting circuitry. |
| RFI/EMI filtered inputs | Integrated input filtering attenuates >60 dB of RF interference above 10 MHz, improving immunity in motor-drive or wireless-coexistence environments. |
| Controlled startup | Suppresses power-on inrush current and avoids output glitches during supply ramp-up - essential for systems with hot-swap or sequenced power rails. |
| Zero-drift architecture | Removes 1/f noise and guarantees <0.003 µV/°C drift - enables decade-long calibration intervals in metrology-grade instrumentation. |
Applications
| Battery Test Equipment | Data Acquisition (DAQ) Systems |
|---|---|
|
Use Scenario: Precision measurement of cell voltage and internal resistance during charge/discharge cycling under varying temperature and load conditions. IC Role / Device Role / Timing Role: Front-end amplifier for Kelvin-connected voltage sense paths, rejecting common-mode noise from high-current switching. Use Value: 4 µV offset and 0.003 µV/°C drift ensure ≤0.1 mV absolute error across –20°C to +60°C, meeting ISO 16750-4 automotive battery validation requirements. |
Use Scenario: Simultaneous sampling of multiple low-level sensor outputs (thermocouples, RTDs, strain gauges) in industrial control cabinets. IC Role / Device Role / Timing Role: Channel-selectable signal conditioner with MUX-friendly inputs, enabling sub-2 µs settling after channel change. Use Value: 1.7 µs to 0.01% settling and RFI-filtered inputs allow 500 kSPS effective throughput per channel without inter-channel crosstalk or RF-induced offset shifts. |
| Weigh Scale Load Cell Interface | Analog Input Modules |
|
Use Scenario: Amplifying microvolt-level Wheatstone bridge outputs from precision load cells in legal-for-trade weighing systems. IC Role / Device Role / Timing Role: Instrumentation-grade gain stage with ultra-low noise and near-zero drift, directly driving 24-bit sigma-delta ADCs. Use Value: 0.12 µVPP 0.1–10 Hz noise and 168 dB CMRR maintain ≥100 dB SNR and eliminate thermal EMF-induced drift in Class III/III LFT platforms. |
Use Scenario: Signal conditioning for programmable logic controller (PLC) analog input cards accepting 4–20 mA, ±10 V, or thermocouple inputs. IC Role / Device Role / Timing Role: Reconfigurable precision amplifier supporting multiple input ranges and isolation-coupled signal paths. Use Value: ±18 V supply range and rail-to-rail output enable seamless support of bipolar ±10 V inputs and unipolar 0–10 V outputs on same PCB footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188IDR | Higher 6 µV max offset, 0.03 µV/°C drift, 8.8 nV/√Hz noise; same SOIC-8 package and supply range. | Lower DC precision limits use in <18-bit systems; better suited for cost-sensitive industrial sensors where 0.01% accuracy suffices. | Select OPA2188IDR when BOM cost is prioritized over long-term drift stability and system-level calibration overhead can be accepted. |
| OPA2189IDR | Lower 0.4 µV max offset, 0.005 µV/°C drift, 5.2 nV/√Hz noise; identical pinout but higher 1.3 mA quiescent current. | Superior DC specs justify use in metrology and semiconductor test; higher IQ limits battery life in portable instruments. | Select OPA2189IDR when ultimate offset stability is required and thermal/power budget permits +54% IQ increase over OPA182IDT. |
Compared with OPA182IDT, OPA2188IDR trades measurable DC precision for lower unit cost, while OPA2189IDR extends offset performance at the expense of higher power - making OPA182IDT the optimal balance for industrial DAQ and battery test systems requiring certified 16-bit accuracy with thermal robustness.
Availability
OPA182IDT is available at Aetrix Electronics and suitable for battery test equipment, industrial analog input modules, and precision weigh scale designs requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA182IDT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The OPAx182 family was designed specifically for high-precision, multichannel signal acquisition systems where zero-drift stability, MUX compatibility, and rail-to-rail output are mandatory - targeting data loggers, automated test equipment, and industrial process controllers.
FAQ
What is the maximum operating temperature range for the OPA182IDT?
The OPA182IDT is specified to operate continuously from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD22-A108 and supports deployment in harsh industrial enclosures, automotive under-hood test fixtures, and outdoor battery monitoring systems without derating.
Does the OPA182IDT require external compensation for unity-gain stability?
No, the OPA182IDT is internally compensated and unity-gain stable across its full supply range (±2.25 V to ±18 V). It drives ≥100 pF capacitive loads without oscillation in noninverting configurations, eliminating the need for external compensation networks in standard buffer or gain-of-one applications.
How does the MUX-friendly input architecture of the OPA182IDT improve multichannel DAQ performance?
The OPA182IDT's MUX-friendly inputs prevent inrush current when large differential voltages are applied during channel switching - reducing settling time to 1.7 µs (0.01%) and eliminating transient-induced measurement errors. This enables faster scan rates in 16-channel DAQ systems without sacrificing accuracy.
Can the OPA182IDT be used with single-supply operation?
Yes, the OPA182IDT supports single-supply operation from 4.5 V to 36 V. Its input includes the negative rail (V–), and output swings rail-to-rail - allowing direct interface with 3.3 V or 5 V microcontrollers and 24 V industrial buses without level-shifting circuitry.
What is the typical input bias current of the OPA182IDT at 25°C?
The typical input bias current of the OPA182IDT is ±50 pA at 25°C, with a maximum of ±350 pA over temperature. This ultra-low IB enables high-impedance sensor interfacing (e.g., pH electrodes, piezoresistive sensors) without significant voltage drop across source impedances up to 10 GΩ.
OPA182IDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- 3.6 MHz
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 0.45 µV
- Current - Supply:
- 850µA
- 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
OPA182IDT FAQ
1.How can I place an order for OPA182IDT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA182IDT 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 OPA182IDT reliable?
The price and inventory of OPA182IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA182IDT is usually 5 days.
3.What payment methods are accepted for OPA182IDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA182IDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA182IDT?
OPA182IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA182IDT 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 OPA182IDT?
For technical support, including OPA182IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA182IDT requirements.
6.How does Aetrix verify that OPA182IDT is sourced from the original manufacturer or authorized distributors?
All OPA182IDT 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 OPA182IDT meets industry standards.
7.What is the process for return or replacement of OPA182IDT?
All OPA182IDT units undergo pre-shipment inspection (PSI). If there is an issue with OPA182IDT, 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 OPA182IDT part is unused and in its original packaging.
Return procedure for OPA182IDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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