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Texas Instruments OPA182IDR
- Part No.:
- OPA182IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA182IDR.pdf
- Description:
- 36-V, 5-MHZ, SINGLE, LOW-NOISE,
- Quantity:
- Payment:
- Shipping:
Inventory:2,650
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Product details
Overview
OPA182IDR 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 10 V/µs slew rate - enabling stable, low-error amplification of low-level sensor signals in battery test equipment and weigh scale front-ends.
For engineers reviewing the OPA182IDR datasheet, OPA182IDR pinout, OPA182IDR application, or OPA182IDR equivalent, this page provides verified specifications, SOIC-8 package terminal mapping, MUX-friendly input behavior, real-world use cases in DC power supplies and analog input modules, and two validated alternative op amps with documented performance trade-offs.
Technical Context
The OPA182IDR employs a proprietary auto-zeroing chopper-stabilized architecture that eliminates 1/f noise and achieves near-zero drift over –40°C to +125°C. Its MUX-friendly input stage prevents inrush current during large differential input transients, critical in multiplexed DAQ systems where channel switching induces step changes across inputs.
It features RFI/EMI filtered inputs, phase-reversal protection, and a controlled startup system that suppresses supply-rail inrush. The device operates from ±2.25 V to ±18 V (or 4.5 V to 36 V single supply), supports rail-to-rail output swing, and accepts inputs down to the negative rail - enabling direct interfacing with grounded-sensor configurations like strain gauge bridges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±4 µV max - ensures ≤0.0004% error in 1-V full-scale measurement without calibration. |
| Offset Drift | 0.003 µV/°C - contributes <0.3 µV total drift over 100°C range, minimizing thermal null errors. |
| Gain Bandwidth | 5 MHz - supports stable closed-loop gain ≥100 at 50 kHz, suitable for fast-settling anti-alias filtering. |
| Slew Rate | 10 V/µs - settles a 10-V step to 0.01% in 1.7 µs, enabling high-throughput sampling in multichannel systems. |
| Input Voltage Noise | 5.7 nV/√Hz at 1 kHz - dominates noise floor in 10–100 kHz bandwidths, critical for low-noise sensor amplification. |
| CMRR | 168 dB (at ±18 V) - rejects >10⁸× common-mode interference, essential for high-gain instrumentation topologies. |
| Supply Range | ±2.25 V to ±18 V - accommodates industrial 24-V rails and portable 5-V/12-V systems without level-shifting. |
| Quiescent Current | 0.85 mA per amplifier - enables low-power operation in battery-powered test equipment with minimal self-heating. |
Pinout & Package
OPA182IDR is supplied in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and 1.27-mm pitch. Thermal resistance is 112.9°C/W (junction-to-ambient).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection; must be left floating or tied to ground for mechanical stability only. |
| 2 | Inverting Input (–IN) | Differential input node; MUX-friendly architecture prevents current spikes during input switching. |
| 3 | Noninverting Input (+IN) | Differential input node; accepts common-mode voltages down to V–, enabling ground-referenced sensors. |
| 4 | Negative Supply (V–) | Power rail connection; must be decoupled with 0.1-µF ceramic capacitor placed within 2 mm of pin. |
| 5 | NC | No internal connection; electrically isolated; no routing or grounding required. |
| 6 | Output (OUT) | Rail-to-rail output capable of sourcing/sinking ≥65 mA; drives ≥10-kΩ loads to within 15 mV of rails. |
| 7 | Positive Supply (V+) | Power rail connection; requires local 0.1-µF ceramic decoupling; supports up to 36-V single-supply operation. |
| 8 | NC | No internal connection; unused terminal; may be left unconnected or grounded for PCB symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-friendly input architecture | Eliminates input-stage inrush current during large differential voltage transitions, preventing settling errors in multiplexed sensor arrays. |
| RFI/EMI filtered inputs | Integrated input filtering suppresses high-frequency interference from switch-mode power supplies and radio transceivers. |
| Controlled startup system | Prevents supply-rail inrush current during power-up, reducing stress on upstream regulators and improving system reliability. |
| Phase-reversal protection | Guarantees output remains monotonic even when inputs exceed common-mode range - avoids catastrophic feedback loop reversal. |
| Rail-to-rail output with negative-rail input | Enables direct interface with grounded sensors (e.g., load cells, thermocouples) without level-shifting circuitry. |
Applications
| Battery Test Equipment | DC Power Supply Monitoring |
|---|---|
|
Use Scenario: Precision measurement of cell voltage and internal resistance during charge/discharge cycling under varying load conditions. IC Role / Device Role / Timing Role: Front-end buffer and gain stage for 16-bit ADC inputs, rejecting common-mode ripple while preserving µV-level resolution. Use Value: 0.003 µV/°C drift ensures <0.3 µV thermal error over operating temperature, maintaining calibration integrity across environmental chambers. |
Use Scenario: Real-time sensing of output voltage and current in programmable DC power supplies for closed-loop regulation and safety cutoff. IC Role / Device Role / Timing Role: High-speed, low-drift difference amplifier in shunt-based current sensing path with 10-V/µs slew rate enabling fast fault response. Use Value: 5 MHz bandwidth supports accurate reconstruction of transient load steps up to 500 kHz, critical for dynamic compliance testing. |
| Data Acquisition Systems | Weigh Scale Signal Conditioning |
|
Use Scenario: Multiplexed analog input module acquiring signals from 16+ channels of thermocouples, RTDs, and strain gauges. IC Role / Device Role / Timing Role: Channel-specific precision amplifier with MUX-friendly inputs to prevent cross-talk and settling delays during channel switching. Use Value: Inrush-free inputs reduce per-channel settling time to ≤1.7 µs (0.01%), enabling ≥500 kSPS aggregate throughput without guard-banding. |
Use Scenario: Amplification of millivolt-level outputs from load cell bridges in industrial platform scales requiring 1:10,000+ resolution. IC Role / Device Role / Timing Role: Instrumentation-grade gain block with 168 dB CMRR to reject bridge excitation noise and power supply coupling. Use Value: 4 µV max offset contributes <0.04% FS error at 10-mV full-scale bridge output - eliminating need for factory trim in Class III metrology 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 |
|---|---|---|---|
| OPA2188IDR | Higher 6 µV max offset, 0.03 µV/°C drift, 8.8 nV/√Hz noise, same SOIC-8 package. | Lower dc precision and higher noise limit use in sub-16-bit DAQ or cost-sensitive industrial controls. | Select when budget constraints outweigh need for ultra-low drift; verify thermal error budgets allow 10× higher drift. |
| OPA2189IDR | Lower 0.4 µV max offset, 0.005 µV/°C drift, 5.2 nV/√Hz noise, but 36-V supply limited to ±18 V (same SOIC-8). | Superior dc specs suit metrology-grade instruments; identical pinout enables drop-in replacement where supply rails permit. | Preferred for highest-accuracy applications; confirm system supply stays within ±18 V to avoid exceeding absolute max ratings. |
Compared with OPA182IDR, OPA2188IDR trades precision for lower cost and wider supply tolerance, while OPA2189IDR improves offset and noise at the expense of stricter supply limits - making OPA182IDR the optimal balance of performance, robustness, and design flexibility for industrial DAQ and test equipment.
Availability
OPA182IDR is available at Aetrix Electronics and suitable for battery test equipment, DC power supply monitoring, and data acquisition systems requiring stable component supply, long-term calibration retention, and guaranteed manufacturability through 2030.
Supply support for OPA182IDR 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 over 50 years of innovation in precision amplifiers and data converters.
The OPAx182 product line was engineered specifically for high-accuracy, multichannel signal acquisition in automated test equipment, industrial process control, and precision weighing - prioritizing zero-drift stability, MUX compatibility, and robust EMI immunity.
FAQ
What is the maximum supply voltage rating for OPA182IDR?
The OPA182IDR has an absolute maximum supply voltage of ±20 V for dual-supply operation or 40 V for single-supply operation. However, its recommended operating range is ±2.25 V to ±18 V (dual) or 4.5 V to 36 V (single). Exceeding ±18 V or 36 V risks permanent damage and invalidates parametric guarantees - always observe these limits in OPA182IDR designs.
Does OPA182IDR support rail-to-rail input operation?
No, OPA182IDR does not support rail-to-rail input. Its common-mode input voltage range extends from (V–) – 0.1 V to (V+) – 2.5 V, meaning the positive input cannot swing within 2.5 V of the positive rail. However, it does support input down to the negative rail - a key feature for interfacing with grounded sensors. This asymmetry is explicitly specified in the OPA182IDR electrical characteristics table.
How does the MUX-friendly architecture of OPA182IDR improve multichannel DAQ performance?
The MUX-friendly architecture in OPA182IDR eliminates input-stage inrush current when large differential voltages are applied during channel switching - a common cause of settling delay and crosstalk in multiplexed systems. This allows OPA182IDR to settle to 0.01% in just 1.7 µs after a 10-V step, enabling faster channel scan rates without sacrificing accuracy. This behavior is measured and guaranteed in the OPA182IDR datasheet.
Can OPA182IDR drive capacitive loads directly?
OPA182IDR can drive moderate capacitive loads, but stability depends on layout and external isolation. The datasheet specifies capacitive load drive capability "See Typical Characteristics" and shows overshoot vs. capacitance curves (Figures 7-25 and 7-26). For loads >100 pF, a series resistor (e.g., 25 Ω) between amplifier output and load is recommended to maintain phase margin - this guidance is confirmed in the OPA182IDR application section and layout guidelines.
What is the guaranteed input offset voltage drift specification for OPA182IDR over temperature?
The OPA182IDR guarantees ±0.003 µV/°C maximum input offset voltage drift over the full –40°C to +125°C operating temperature range. This value is explicitly listed in Table 7-7 (Electrical Characteristics) under dVOS/dT for OPA182ID (SOIC-8 variant), and is a defining specification of the zero-drift architecture - not an extrapolated or typical value.
OPA182IDR 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
OPA182IDR FAQ
1.How can I place an order for OPA182IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA182IDR 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 OPA182IDR reliable?
The price and inventory of OPA182IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA182IDR is usually 5 days.
3.What payment methods are accepted for OPA182IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA182IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA182IDR?
OPA182IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA182IDR 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 OPA182IDR?
For technical support, including OPA182IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA182IDR requirements.
6.How does Aetrix verify that OPA182IDR is sourced from the original manufacturer or authorized distributors?
All OPA182IDR 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 OPA182IDR meets industry standards.
7.What is the process for return or replacement of OPA182IDR?
All OPA182IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA182IDR, 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 OPA182IDR part is unused and in its original packaging.
Return procedure for OPA182IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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