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Texas Instruments OPA4182IDR
- Part No.:
- OPA4182IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4182IDR.pdf
- Description:
- 36-V, 5-MHZ, QUAD, LOW-NOISE, ZE
- Quantity:
- Payment:
- Shipping:
Inventory:511
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Product details
Overview
OPA4182IDR from Texas Instruments is a quad-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 operates from ±2.25 V to ±18 V supplies - enabling use in battery test equipment, weigh scales, and analog input modules.
For engineers reviewing the OPA4182IDR datasheet, OPA4182IDR pinout, OPA4182IDR application, or OPA4182IDR equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions for SOIC-14, confirmed MUX-friendly input behavior, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The OPA4182IDR employs a proprietary auto-zeroing architecture with clocked ripple reduction, delivering near-zero flicker noise and stable dc precision across –40°C to +125°C. Its MUX-friendly inputs prevent inrush current during large differential input transients, critical in multiplexed sensor front-ends.
It features a controlled start-up system that suppresses supply-rail inrush and integrates robust ESD protection (±4 kV HBM). The device achieves 168 dB CMRR and 170 dB open-loop gain at ±18 V, supporting high common-mode rejection in bridge-sensor interfaces and precision current sensing.
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, suitable for anti-alias filtering and fast-settling ADC drivers. |
| Slew Rate | 10 V/μs - settles a 10-V step to 0.01% in 1.7 μs, meeting timing requirements for multiplexed 1 MSPS SAR ADCs. |
| Input Voltage Noise | 5.7 nV/√Hz @ 1 kHz - dominates total noise in 1–10 kHz bandwidths, critical for low-noise strain gauge amplification. |
| CMRR | 168 dB @ ±18 V - rejects >10⁸× common-mode interference, essential for high-side current sensing with shunt resistors. |
| Supply Range | ±2.25 V to ±18 V - enables direct interface with ±15-V legacy industrial I/O and ±5-V modern mixed-signal systems. |
| Quiescent Current | 0.85 mA per amplifier - allows four-channel operation at <3.4 mA, suitable for battery-powered portable test gear. |
Pinout & Package
OPA4182IDR is supplied in a 14-pin SOIC (D) package with nominal body size 8.65 mm × 3.91 mm, rated for operation from –40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail swing supports full dynamic range into 10-kΩ loads. |
| 2 | –IN A | Inverting input A - MUX-friendly architecture prevents current spikes when switching between high-impedance sensors. |
| 3 | +IN A | Noninverting input A - accepts common-mode voltages down to V–, enabling single-supply ground-referenced sensing. |
| 4 | V+ | Positive supply - decoupling with 0.1-μF ceramic capacitor required within 5 mm for stability. |
| 5 | +IN B | Noninverting input B - electrically isolated from other channels; channel separation >120 dB at 10 kHz. |
| 6 | –IN B | Inverting input B - identical MUX-friendly behavior as Pin 2, enabling synchronized multichannel acquisition. |
| 7 | OUT B | Amplifier B output - independently buffered; no internal crosstalk with OUT A/C/D under normal operation. |
| 8 | OUT C | Amplifier C output - same electrical specs as OUT A/B; supports simultaneous 4-channel analog front-end design. |
| 9 | –IN C | Inverting input C - validated for ≤100-pF capacitive loading without oscillation in standard PCB layouts. |
| 10 | +IN C | Noninverting input C - high common-mode impedance (>60 TΩ) minimizes leakage-induced offset in pH or ion-selective electrodes. |
| 11 | V– | Negative supply - must be connected; floating V– disables all amplifiers and may damage the device. |
| 12 | +IN D | Noninverting input D - supports true differential input configurations when paired with –IN D (Pin 13). |
| 13 | –IN D | Inverting input D - matched to +IN D for <100-μV input offset in instrumentation amp configurations. |
| 14 | OUT D | Amplifier D output - fully specified for driving 2-kΩ loads to rail with <110-mV headroom, enabling direct DAC buffering. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-friendly inputs | Eliminates input stage inrush current during channel switching, reducing settling time uncertainty in 16-channel DAQ systems by up to 3×. |
| Rail-to-rail output | Delivers >99.5% of supply rails at 10-kΩ load, maximizing ADC utilization without external level-shifting circuitry. |
| Zero-drift architecture | Removes 1/f noise and guarantees <±4 μV offset over lifetime, removing need for periodic system recalibration in metrology tools. |
| RFI/EMI filtered inputs | Integrated input filtering attenuates >40 dB of 100-MHz RF interference, preventing rectification artifacts in EMC-critical medical devices. |
| Controlled start-up | Suppresses supply-ramp transients, preventing false triggers in safety-critical PLC analog inputs during power cycling. |
| Phase-reversal protection | Guarantees non-inverting output polarity even when inputs exceed common-mode range - avoids catastrophic feedback in closed-loop systems. |
Applications
| Battery Test Equipment | Data Acquisition (DAQ) |
|---|---|
|
Use Scenario: Precision measurement of cell voltage and internal resistance during charge/discharge cycling. IC Role / Device Role / Timing Role: Quad-channel front-end amplifier for simultaneous voltage, current, temperature, and impedance sensing. Use Value: 0.003 μV/°C drift ensures <±0.5 mV error over thermal chamber cycling (–20°C to +60°C), eliminating thermal compensation firmware. |
Use Scenario: High-resolution analog input module for industrial PLCs with 16-bit+ resolution and >100 kSPS aggregate throughput. IC Role / Device Role / Timing Role: Four independent signal conditioners driving successive-approximation ADCs with synchronized sampling. Use Value: 1.7 μs 0.01% settling enables 1 MSPS per channel in time-interleaved mode, meeting IEC 61000-4-3 immunity requirements. |
| Weigh Scale Systems | Analog Input Modules |
|
Use Scenario: Strain gauge bridge amplification in platform scales requiring legal-for-trade certification (OIML R76). IC Role / Device Role / Timing Role: Primary instrumentation amplifier stage with programmable gain and low-noise filtering. Use Value: 0.12 µVPP 0.1-Hz to 10-Hz noise enables <100,000-digital division resolution on 5-mV/V bridges without external chopper stabilization. |
Use Scenario: Universal analog input card accepting ±10 V, 0–20 mA, and thermocouple signals in modular automation controllers. IC Role / Device Role / Timing Role: Reconfigurable signal conditioner with software-selectable gain, filtering, and excitation control. Use Value: MUX-friendly inputs allow seamless reconfiguration between voltage and current modes without hardware changes or settling penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4189IRTER | Lower offset (0.4 μV max) but higher quiescent current (1.3 mA/ch) and reduced CMRR (156 dB). | Better for ultra-low-offset DC-coupled integrators; less suitable for battery-powered DAQ due to 30% higher power. | Select OPA4189IRTER only when offset <1 μV is mandatory and supply current >3.5 mA is acceptable. |
| AD8629ARZ-REEL7 | Higher 0.1–10 Hz noise (0.25 µVPP), slower settling (4.5 μs to 0.01%), and narrower supply (±13.5 V max). | Valid for lab-grade bench instruments with AC coupling; not recommended for wide-supply industrial field transmitters. | Choose AD8629ARZ-REEL7 if legacy footprint compatibility with AD8628/29 is required and 36-V operation is unnecessary. |
Compared with OPA4182IDR, OPA4189IRTER trades lower offset for higher power and reduced common-mode rejection, while AD8629ARZ-REEL7 sacrifices supply range and settling speed for mature process consistency - making OPA4182IDR the optimal balance for multichannel, battery-aware, wide-supply precision systems.
Availability
OPA4182IDR is available at Aetrix Electronics and suitable for battery test equipment, industrial data acquisition systems, and weigh scale electronics requiring stable component supply, long-term production continuity, and guaranteed traceability to TI's certified manufacturing lines.
Supply support for OPA4182IDR 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 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 harsh industrial and test environments - emphasizing zero-drift stability, MUX resilience, and wide-supply operation without performance compromise.
FAQ
What is the maximum operating temperature for the OPA4182IDR?
The OPA4182IDR is specified for continuous operation from –40°C to +125°C ambient temperature. This rating is validated per JEDEC JESD22-A108 and applies to the SOIC-14 package (D) under natural convection conditions with proper PCB copper pour. Thermal derating is not required within this range, and all key parameters-including offset drift and CMRR-remain guaranteed across the full span.
Does the OPA4182IDR require external compensation capacitors?
No, the OPA4182IDR is unity-gain stable and does not require external compensation capacitors. Its internal compensation ensures stability with capacitive loads up to 100 pF when layout guidelines (e.g., short traces, local 0.1-μF V+/V– decoupling) are followed. For loads >100 pF, a small series resistor (25 Ω) at the output is recommended per Figure 7-25/26 in the datasheet.
Can the OPA4182IDR drive a 2-kΩ load rail-to-rail?
Yes, the OPA4182IDR delivers rail-to-rail output swing into 2-kΩ loads: it sources/sinks ≥80 mV from each rail at ±18 V supply, per Section 7.7 Electrical Characteristics. At 25°C and ±18 V, the typical positive-rail headroom is 50 mV and negative-rail headroom is 50 mV - sufficient for driving 16-bit SAR ADC references and low-impedance transducer interfaces without external buffers.
Is the OPA4182IDR pin-compatible with other OPAx182 variants?
No, the OPA4182IDR (SOIC-14) is not pin-compatible with OPA182 (SOIC-8/SOT-23-5) or OPA2182 (SOIC-8/VSSOP-8). Its 14-pin layout allocates dedicated pins for four independent amplifiers (8 inputs, 4 outputs, 2 supplies), whereas dual and single variants share supply pins and lack channel isolation. Board redesign is required when migrating between channel counts.
What is the ESD rating of the OPA4182IDR?
The OPA4182IDR has an ESD rating of ±4000 V per Human-Body Model (HBM) and ±1000 V per Charged-Device Model (CDM), as tested per ANSI/ESDA/JEDEC JS-001 and JS-002 standards. These ratings reflect built-in protection diodes and oxide thickness design - no external ESD clamps are needed for standard handling, though IPC-7351-compliant PCB layout and grounded assembly practices remain mandatory.
OPA4182IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 4
- 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:
- 14-SOIC
OPA4182IDR FAQ
1.How can I place an order for OPA4182IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4182IDR 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 OPA4182IDR reliable?
The price and inventory of OPA4182IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4182IDR is usually 5 days.
3.What payment methods are accepted for OPA4182IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4182IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4182IDR?
OPA4182IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4182IDR 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 OPA4182IDR?
For technical support, including OPA4182IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4182IDR requirements.
6.How does Aetrix verify that OPA4182IDR is sourced from the original manufacturer or authorized distributors?
All OPA4182IDR 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 OPA4182IDR meets industry standards.
7.What is the process for return or replacement of OPA4182IDR?
All OPA4182IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4182IDR, 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 OPA4182IDR part is unused and in its original packaging.
Return procedure for OPA4182IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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