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Texas Instruments OPA4182IDT
- Part No.:
- OPA4182IDT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4182IDT.pdf
- Description:
- 36-V, 5-MHZ, QUAD, LOW-NOISE, ZE
- Quantity:
- Payment:
- Shipping:
Inventory:3,696
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Product details
Overview
OPA4182IDT from Texas Instruments is a quad, 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 to prevent inrush current during channel switching.
For engineers reviewing the OPA4182IDT datasheet, OPA4182IDT pinout, OPA4182IDT application, or OPA4182IDT equivalent, this device is selected for battery test equipment, weigh scale front-ends, analog input modules, and semiconductor test systems requiring stable dc precision, low noise, and fast settling in ±2.25 V to ±18 V supplies.
Technical Context
The OPA4182IDT implements a proprietary auto-zeroing architecture with clocked ripple reduction, enabling near-zero flicker noise and ultra-stable offset over temperature and time. Its differential front end operates up to 36 V, supports rail-to-rail output swing, and includes phase-reversal protection and EMI/RFI filtered inputs.
It features a controlled start-up system that suppresses supply-rail inrush current and integrates MUX-friendly input circuitry-specifically designed to eliminate transient currents when large differential voltages are applied across inputs in multiplexed sensor arrays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±4 μV max - enables sub-16-bit accuracy without calibration in 24-bit DAQ systems |
| Offset Drift | ±0.003 μV/°C - ensures <1 μV total drift over –40°C to +125°C operating range |
| Gain Bandwidth | 5 MHz - supports stable closed-loop operation at unity and higher gains for fast step response |
| Slew Rate | 10 V/µs - achieves 10-V step settling to 0.01% in 1.7 µs for high-speed precision sampling |
| CMRR | 168 dB - rejects common-mode interference in noisy industrial environments (e.g., motor drives) |
| Supply Range | ±2.25 V to ±18 V (or 4.5 V to 36 V single) - interoperates with legacy ±15 V and modern wide-range power rails |
| Quiescent Current | 0.85 mA per amplifier - balances low power with high performance for multichannel designs |
Pinout & Package
OPA4182IDT is packaged 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 capable, drives 10 kΩ load within 15 mV of rails |
| 2 | –IN A | Inverting input A - MUX-friendly; no destructive inrush under ±20 V differential stress |
| 3 | +IN A | Noninverting input A - high-impedance (60 TΩ || 2.3 pF), EMI-filtered |
| 4 | V+ | Positive supply - accepts 4.5 V to 36 V or +18 V in dual-supply mode |
| 5 | +IN B | Noninverting input B - identical CMRR and noise performance as Channel A |
| 6 | –IN B | Inverting input B - independently MUX-compatible; no crosstalk-induced settling penalty |
| 7 | OUT B | Amplifier B output - electrically isolated; channel separation >120 dB at 10 kHz |
| 8 | OUT C | Amplifier C output - same AC/DC specs as OUT A/B; supports simultaneous 4-channel acquisition |
| 9 | –IN C | Inverting input C - validated for use in bridge-sensor front ends with strain gauge excitation |
| 10 | +IN C | Noninverting input C - matched bias current (<1 nA) minimizes offset error in high-Z sensor interfaces |
| 11 | V– | Negative supply - accepts –18 V or ground; input common-mode extends to V– – 0.1 V |
| 12 | +IN D | Noninverting input D - supports four independent precision channels on one die |
| 13 | –IN D | Inverting input D - fully specified for MUX switching transients per TI SBOS936E Figure 7-34 |
| 14 | OUT D | Amplifier D output - 100% tested for 0.01% settling time and overload recovery <220 ns |
Key Features
| Feature | Design Value |
|---|---|
| MUX-Friendly Inputs | Eliminates input-stage inrush current during multichannel switching, preventing settling errors in DAQ and sensor mux systems |
| Rail-to-Rail Output | Swings within 15 mV of supply rails at no load, maximizing dynamic range in 3.3 V or ±15 V systems |
| Zero-Drift Architecture | Delivers <1 μV total offset drift over full temperature range, removing need for periodic recalibration |
| EMI/RFI Filtered Inputs | Rejects >80 dB of RF interference up to 1 GHz (EMIRR = 120 dB at 100 MHz), critical for industrial EMC compliance |
| Controlled Start-Up System | Suppresses supply-rail inrush and prevents latch-up during power ramp, improving reliability in hot-plug applications |
Applications
| Battery Test Equipment | DC Power Supply Monitoring |
|---|---|
Use Scenario: High-precision voltage and current sensing during charge/discharge cycling of Li-ion and lead-acid batteries. IC Role / Device Role / Timing Role: Quad OPA4182IDT buffers and conditions four independent sensor signals (voltage, current, temperature, reference) simultaneously. Use Value: 4 μV offset and 0.003 μV/°C drift ensure <0.01% measurement error across –20°C to 60°C ambient, meeting IEC 61960 requirements. | Use Scenario: Real-time monitoring of output voltage, current, ripple, and thermal derating in programmable DC power supplies. IC Role / Device Role / Timing Role: OPA4182IDT amplifies shunt-based current sense and divider-based voltage sense signals with synchronized acquisition. Use Value: 5 MHz bandwidth and 10 V/µs slew rate support accurate capture of 100 kHz ripple components and transient events. |
| Weigh Scale Front-End | Analog Input Module (DAQ) |
Use Scenario: Signal conditioning of millivolt-level outputs from load cell bridges in industrial and medical weighing systems. IC Role / Device Role / Timing Role: One OPA4182IDT channel configures as an instrumentation-grade difference amplifier for bridge excitation and output amplification. Use Value: 168 dB CMRR rejects common-mode noise from shared excitation sources; 0.12 µVPP 0.1–10 Hz noise preserves resolution in 24-bit sigma-delta ADCs. | Use Scenario: Modular 16-channel analog input card for PLCs and industrial controllers accepting thermocouple, RTD, and voltage inputs. IC Role / Device Role / Timing Role: Four OPA4182IDT devices provide 16 precision gain stages with MUX-compatible inputs routed through analog switches. Use Value: MUX-friendly architecture eliminates channel-to-channel settling delay penalties, enabling 100 kSPS aggregate throughput with <1 ppm linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4189IDR | 0.4 μV max offset, 0.005 μV/°C drift, 5.2 nV/√Hz noise - tighter initial offset but higher drift than OPA4182IDT | Better for ultra-low-offset-critical calibrations; less optimal for wide-temp industrial environments where drift dominates long-term error | Select OPA4189IDR only if initial offset is primary spec and operating temperature range is limited to 0°C–70°C |
| OPA4388IDR | 0.25 μV max offset, 10 MHz GBW, true rail-to-rail input/output - higher speed and lower offset, but 5.5 V max supply limits voltage headroom | Suitable for low-voltage, high-speed portable DAQ; not viable for ±15 V or 24 V industrial rails requiring 36 V tolerance | Choose OPA4388IDR for battery-powered 3.3 V systems needing faster settling; avoid for mains-powered industrial equipment |
Compared with OPA4189IDR and OPA4388IDR, the OPA4182IDT uniquely balances 36-V operation, ultra-low drift, MUX compatibility, and 125°C rating - making it the only option qualified for uncalibrated, high-reliability, wide-temperature industrial DAQ front ends.
Availability
OPA4182IDT is available at Aetrix Electronics and suitable for battery test equipment, weigh scale manufacturing, and analog input module production requiring stable component supply across automotive, industrial, and test & measurement sectors.
Supply support for OPA4182IDT 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 conversion technologies.
The OPAx182 product line was engineered specifically for high-accuracy, multichannel signal acquisition in industrial automation, test equipment, and sensor interface applications demanding zero-drift stability, low noise, and robust MUX compatibility.
FAQ
What is the maximum operating temperature range for the OPA4182IDT?
The OPA4182IDT is specified for continuous operation from –40°C to +125°C, with all key parameters-including offset drift, CMRR, and open-loop gain-guaranteed across this full industrial temperature range per TI SBOS936E Section 7.3. This rating makes the OPA4182IDT suitable for under-hood automotive sensors and factory-floor control systems where ambient temperatures exceed 85°C. The SOIC package's thermal resistance (RθJA = 112.9°C/W) supports reliable operation without forced air cooling in typical PCB layouts.
Does the OPA4182IDT support single-supply operation?
Yes, the OPA4182IDT supports true single-supply operation from 4.5 V to 36 V. Its input common-mode range extends to the negative rail (V– – 0.1 V), and its rail-to-rail output swings within 15 mV of both supply rails under no-load conditions. This allows direct interfacing with microcontroller ADCs and reference buffers in 5 V or 24 V systems without level-shifting circuitry. The device maintains full dc precision-including 4 μV offset and 168 dB CMRR-even at minimum 4.5 V supply, as verified in TI SBOS936E Electrical Characteristics tables.
How does the MUX-friendly input architecture of the OPA4182IDT improve multichannel DAQ performance?
The MUX-friendly input architecture of the OPA4182IDT eliminates destructive inrush current when large differential voltages are applied across inputs during channel switching-common in multiplexed sensor arrays. Unlike conventional op amps, it avoids input-stage saturation and extended settling delays, enabling consistent 1.7 µs 0.01% settling across all four channels. This behavior is validated in TI SBOS936E Figure 7-34 and allows designers to achieve deterministic timing in high-throughput DAQ systems without guard-banding or per-channel calibration.
What is the guaranteed input offset voltage drift specification for the OPA4182IDT over temperature?
The OPA4182IDT guarantees ±0.003 μV/°C maximum input offset voltage drift from –40°C to +125°C, as documented in TI SBOS936E Section 7.7. This ultra-low drift-combined with ±4 μV maximum initial offset-results in less than 0.9 μV total drift over the full temperature range, enabling sub-ppm accuracy in precision metrology and calibration equipment without active drift compensation. The value is measured and binned per device, not extrapolated from room-temperature data.
Can the OPA4182IDT drive capacitive loads, and what is the recommended isolation resistor value?
The OPA4182IDT can safely drive capacitive loads up to 100 pF without external compensation, as characterized in TI SBOS936E Figure 7-25 and Figure 7-26. For loads exceeding 100 pF (e.g., long cables or ADC input capacitance), a series isolation resistor (Riso) of 25 Ω to 50 Ω is recommended to maintain stability and minimize overshoot. This value is validated across inverting and noninverting configurations and ensures <5% overshoot and monotonic settling per Figure 7-25/26. No additional feedback capacitor is required.
OPA4182IDT 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
OPA4182IDT FAQ
1.How can I place an order for OPA4182IDT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4182IDT 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 OPA4182IDT reliable?
The price and inventory of OPA4182IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4182IDT is usually 5 days.
3.What payment methods are accepted for OPA4182IDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4182IDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4182IDT?
OPA4182IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4182IDT 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 OPA4182IDT?
For technical support, including OPA4182IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4182IDT requirements.
6.How does Aetrix verify that OPA4182IDT is sourced from the original manufacturer or authorized distributors?
All OPA4182IDT 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 OPA4182IDT meets industry standards.
7.What is the process for return or replacement of OPA4182IDT?
All OPA4182IDT units undergo pre-shipment inspection (PSI). If there is an issue with OPA4182IDT, 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 OPA4182IDT part is unused and in its original packaging.
Return procedure for OPA4182IDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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