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Texas Instruments OPA2182IDGKT
- Part No.:
- OPA2182IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2182IDGKT.pdf
- Description:
- IC OPAMP ZER-DRIFT 2CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:767
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Product details
Overview
OPA2182IDGKT 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 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 OPA2182IDGKT datasheet, OPA2182IDGKT pinout, OPA2182IDGKT application, or OPA2182IDGKT equivalent, this page provides verified specifications, validated pin functions, confirmed dual-amplifier use cases in DC power supplies and analog input modules, and two technically documented alternative parts with explicit functional and application-level differences.
Technical Context
The OPA2182IDGKT implements a proprietary auto-zeroing architecture with ripple reduction technology to eliminate 1/f noise and achieve near-zero drift over –40°C to +125°C. Its differential front end operates up to ±18 V (36 V total), supports rail-to-rail output swing within 15 mV of either rail at no load, and features controlled startup to reject supply-ramp inrush current.
Each amplifier channel includes EMI/RFI-filtered inputs, phase-reversal protection, and >168 dB CMRR at ±18 V - ensuring dc stability and ac fidelity in noisy industrial environments. The MUX-friendly design prevents transient currents when large differential voltages are applied across inputs, critical for multiplexed sensor arrays and semiconductor test fixtures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±4 µV maximum - enables sub-0.01% error in 16-bit DAQ systems without calibration. |
| Offset Drift | ±0.003 µV/°C - ensures <1 µV total drift over full –40°C to +125°C range, eliminating thermal recalibration. |
| Gain Bandwidth | 5 MHz - supports stable unity-gain operation and fast settling (1.7 µs to 0.01%) for 10-V step signals. |
| Input Voltage Noise | 5.7 nV/√Hz at 1 kHz; 0.12 µVPP (0.1–10 Hz) - preserves SNR in low-frequency bridge sensor amplification. |
| CMRR | 168 dB at ±18 V - rejects >99.99998% of common-mode interference in unshielded industrial wiring. |
| Supply Range | ±2.25 V to ±18 V (or 4.5 V to 36 V single-supply) - interoperates with legacy ±15 V and modern 24 V industrial rails. |
| Quiescent Current | 0.85 mA per amplifier - balances precision and power efficiency in battery-powered test instruments. |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Output of amplifier A; rail-to-rail capable, drives ≥10 kΩ load to within 15 mV of supply rails. |
| 2 | –IN A | Inverting input of amplifier A; MUX-friendly, EMI-filtered, accepts common-mode voltage down to V–. |
| 3 | +IN A | Noninverting input of amplifier A; same MUX-friendly and EMI-hardened characteristics as –IN A. |
| 4 | V– | Negative supply pin; must be decoupled with 0.1 µF capacitor close to pin for stable operation. |
| 5 | +IN B | Noninverting input of amplifier B; electrically isolated from channel A, supports independent sensor interfaces. |
| 6 | –IN B | Inverting input of amplifier B; identical MUX-friendly behavior and input voltage range as –IN A. |
| 7 | OUT B | Output of amplifier B; fully independent, no crosstalk (<120 dB at 10 kHz) with channel A. |
| 8 | V+ | Positive supply pin; accepts up to +36 V; requires local 0.1 µF decoupling for PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-friendly input architecture | Prevents destructive inrush current during multichannel switching - eliminates need for external series resistors or clamping diodes. |
| Rail-to-rail output with 15-mV headroom | Maximizes dynamic range in single-supply 3.3 V or 5 V microcontroller-based systems without level-shifting circuitry. |
| Zero-drift auto-zeroing core | Delivers <1 µV total offset drift over full temperature range - removes need for periodic system recalibration. |
| EMI/RFI filtered inputs | Rejects >80 dB of 100-MHz RF interference - maintains accuracy in proximity to switching power supplies or wireless transceivers. |
| Controlled startup system | Suppresses supply-ramp transients - prevents false triggering in safety-critical analog monitoring circuits during power-up. |
Applications
| Battery Test Equipment | DC Power Supply Monitoring |
|---|---|
|
Use Scenario: Precision measurement of cell voltage and internal resistance during charge/discharge cycling. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end, with one channel for voltage sensing and the other for current-sense shunt amplification. Use Value: 4 µV offset and 0.003 µV/°C drift ensure <0.005% measurement error across –20°C to +70°C ambient, meeting IEC 62133 compliance requirements. |
Use Scenario: Real-time feedback control and output voltage/current regulation in programmable bench power supplies. IC Role / Device Role / Timing Role: Dual op-amp implementing error amplifier (voltage loop) and current limit comparator (current loop) in isolated feedback path. Use Value: 5 MHz bandwidth and 10 V/µs slew rate enable <5 µs response to load transients, maintaining ±0.02% output regulation under 1-A step changes. |
| Weigh Scale Load Cell Interface | Analog Input Module for PLC |
|
Use Scenario: Amplification and filtering of millivolt-level Wheatstone bridge outputs from strain gauges in industrial scales. IC Role / Device Role / Timing Role: First-stage gain stage (G = 100–1000) with matched dual channels for ratiometric bridge excitation and differential sensing. Use Value: 0.12 µVPP (0.1–10 Hz) noise and >168 dB CMRR reject thermal EMF and 50/60 Hz line noise - achieving 1:1,000,000 resolution in 24-bit sigma-delta ADC systems. |
Use Scenario: Signal conditioning of 4–20 mA, ±10 V, and thermocouple inputs in modular industrial I/O systems. IC Role / Device Role / Timing Role: Dual-channel configurable amplifier supporting multiple input types via software-selected gain and filtering paths. Use Value: MUX-friendly inputs allow seamless reconfiguration between current-loop shunt amplification and high-impedance voltage sensing - reducing BOM count by 33% vs discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188IDGKT | 6 µV max offset, 0.03 µV/°C drift, 8.8 nV/√Hz noise - higher drift and noise than OPA2182IDGKT. | Suitable for cost-sensitive industrial sensors where <0.01% accuracy is acceptable; not recommended for metrology-grade DAQ. | Select OPA2188IDGKT only if budget constraints outweigh need for ultra-low drift and sub-µV offset stability. |
| OPA2189IDGKT | 0.4 µV max offset, 0.005 µV/°C drift, 5.2 nV/√Hz noise - superior offset but slightly higher drift and lower CMRR (160 dB). | Better for ultra-high-precision voltage references and laser diode control; less robust in high-noise factory-floor environments. | Choose OPA2189IDGKT when absolute offset minimization is primary; retain OPA2182IDGKT for best balance of drift, noise, and EMI immunity. |
Compared with OPA2188IDGKT and OPA2189IDGKT, the OPA2182IDGKT offers the optimal trade-off for multichannel industrial DAQ: lowest drift among production-ready duals, integrated MUX protection, and highest CMRR - making it uniquely suited for battery test and weigh scale applications demanding long-term stability without recalibration.
Availability
OPA2182IDGKT is available at Aetrix Electronics and suitable for battery test equipment, DC power supply monitoring, and analog input modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2182IDGKT 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The OPAx182 family was designed specifically for high-accuracy, multichannel signal acquisition systems where zero-drift stability, MUX compatibility, and wide supply range are mandatory - targeting battery test, weigh scale, and industrial process control applications.
FAQ
What is the maximum operating temperature range for the OPA2182IDGKT?
The OPA2182IDGKT is specified for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated across all key parameters including offset drift, CMRR, and open-loop gain - making it suitable for under-hood automotive sensors and industrial motor drive control cabinets where ambient temperatures exceed 100°C.
Does the OPA2182IDGKT require external compensation capacitors?
No, the OPA2182IDGKT is unity-gain stable and does not require external compensation. However, a 0.1 µF ceramic decoupling capacitor must be placed between V+ and V– pins, as close as possible to the device, to maintain PSRR and prevent oscillation under high-frequency EMI exposure - per TI's layout guidelines in SBOS936E Section 9.4.
How does the MUX-friendly architecture of the OPA2182IDGKT improve multichannel system performance?
The MUX-friendly architecture in the OPA2182IDGKT eliminates input-stage inrush current when large differential voltages are switched across its inputs - preventing output glitches, settling delays, and potential damage to downstream ADC drivers. This allows direct connection to multiplexer outputs without series resistors, reducing component count and improving channel-to-channel consistency in DAQ systems.
Can the OPA2182IDGKT drive capacitive loads, and what is the maximum value?
The OPA2182IDGKT can safely drive capacitive loads up to 100 pF in noninverting configurations without external isolation resistors, as verified in Figure 7-26 of SBOS936E. For loads >100 pF, a 25 Ω series resistor at the output is recommended to maintain phase margin and prevent overshoot - critical for driving ADC input filters or long PCB traces.
Is the OPA2182IDGKT pin-compatible with other devices in the OPAx182 family?
The OPA2182IDGKT in VSSOP-8 (DGK) package shares identical pinout with the OPA2182ID (SOIC-8) variant, but is not pin-compatible with OPA182 or OPA4182 due to differing channel counts and pin assignments. Pin mapping is strictly defined in Table 6-2 of SBOS936E and must be verified before PCB reuse.
OPA2182IDGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
- 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-VSSOP
OPA2182IDGKT FAQ
1.How can I place an order for OPA2182IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2182IDGKT 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 OPA2182IDGKT reliable?
The price and inventory of OPA2182IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2182IDGKT is usually 5 days.
3.What payment methods are accepted for OPA2182IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2182IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2182IDGKT?
OPA2182IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2182IDGKT 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 OPA2182IDGKT?
For technical support, including OPA2182IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2182IDGKT requirements.
6.How does Aetrix verify that OPA2182IDGKT is sourced from the original manufacturer or authorized distributors?
All OPA2182IDGKT 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 OPA2182IDGKT meets industry standards.
7.What is the process for return or replacement of OPA2182IDGKT?
All OPA2182IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2182IDGKT, 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 OPA2182IDGKT part is unused and in its original packaging.
Return procedure for OPA2182IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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