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Texas Instruments OPA2180IDGK
- Part No.:
- OPA2180IDGK
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2180IDGK.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:430
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Product details
Overview
OPA2180IDGK from Texas Instruments is a dual-channel, zero-drift, rail-to-rail output operational amplifier optimized for precision DC-coupled signal conditioning in industrial and test equipment. It delivers 75 μV maximum input offset voltage, 0.1 μV/°C drift, 10 nV/√Hz input voltage noise density at 1 kHz, ±2 V to ±18 V supply range, and 120 dB open-loop gain - enabling high-accuracy bridge amplifier and strain gauge front-ends.
For engineers reviewing the OPA2180IDGK datasheet, OPA2180IDGK pinout, OPA2180IDGK application, or OPA2180IDGK equivalent, this page provides verified specifications, package mapping to VSSOP-8, channel-specific pin functions, real-world use cases in temperature measurement and medical instrumentation, and two validated alternative parts with documented technical and application differences.
Technical Context
The OPA2180IDGK implements TI's proprietary auto-zeroing architecture with chopper-stabilized input stage and notch-filtered feedback path to suppress 1/f noise and eliminate long-term offset drift. Its dual-channel layout shares no internal coupling between amplifiers, supporting independent high-precision signal paths.
It operates across –40°C to +105°C (not +125°C like OPA180/OPA4180), supports rail-to-rail output swing within 250 mV of rails under 10 kΩ load, and features RFI-filtered inputs with 114 dB CMRR and 126 dB PSRR - critical for noisy industrial environments and low-level sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 75 μV max - ensures ≤0.0075% error in 1-V full-scale precision measurement systems |
| Offset Drift | 0.1 μV/°C - guarantees <1 μV total drift over 100°C ambient change, eliminating recalibration |
| Input Voltage Noise | 10 nV/√Hz at 1 kHz - enables clean amplification of microvolt-level signals without added broadband noise |
| Supply Range | ±2 V to ±18 V - supports wide dynamic range in both single-supply (4–36 V) and split-supply configurations |
| Open-Loop Gain | 120 dB - provides ≥1 million V/V loop gain for stable closed-loop accuracy down to 0.0001% error |
| CMRR | 114 dB - rejects >5 million:1 common-mode interference, essential for bridge circuits with shared ground noise |
| Quiescent Current | 525 μA per amplifier - balances ultra-low drift performance with power efficiency in battery-backed instrumentation |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad not electrically connected. Designed for high-density PCB layouts with minimal board area and improved thermal dissipation vs SOIC-8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load; rail-to-rail swing within 250 mV of supply rails at 10 kΩ |
| 2 | –IN A | Inverting input, channel A - high-impedance node (10¹² Ω || 9.5 pF) for precision feedback networks |
| 3 | +IN A | Noninverting input, channel A - includes negative rail in common-mode range (V– to V+ – 1.5 V) |
| 4 | V– | Negative supply pin - connects to ground (single-supply) or negative rail (split-supply); reference for all internal biasing |
| 5 | +IN B | Noninverting input, channel B - independent of channel A; enables dual-sensor differential acquisition |
| 6 | –IN B | Inverting input, channel B - matched AC/DC characteristics to channel A for consistent dual-channel performance |
| 7 | OUT B | Amplifier B output - fully isolated from OUT A; supports separate gain stages or differential output configuration |
| 8 | V+ | Positive supply pin - accepts up to ±18 V; supplies both amplifiers; PSRR of 126 dB minimizes supply ripple coupling |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zeroing + chopper stabilization eliminates 1/f noise and reduces long-term offset drift to 0.1 μV/°C |
| Rail-to-rail output | Swings within 250 mV of rails at 10 kΩ load - maximizes dynamic range in low-voltage systems |
| RFI-filtered inputs | Integrated EMI rejection filters suppress >60 dB of RF interference above 10 MHz - critical for industrial EMC compliance |
| High DC precision | 114 dB CMRR + 126 dB PSRR + 120 dB AOL - maintains sub-μV error budget in noisy, high-gain configurations |
| Low input bias current | 250 pA typical - prevents significant voltage drop across high-impedance sensor sources (e.g., thermistors, pH electrodes) |
Applications
| Bridge Amplifiers | Strain Gauges |
|---|---|
|
Use Scenario: Amplifying mV-level differential output from Wheatstone bridges in load cells and pressure transducers. IC Role / Device Role / Timing Role: Dual-channel OPA2180IDGK configures as precision instrumentation amplifier (IA) with matched gain-setting resistors on each channel. Use Value: 75 μV max offset and 0.1 μV/°C drift ensure ≤0.01% full-scale error over temperature - meeting Class C load cell accuracy requirements. |
Use Scenario: Signal conditioning for metallic foil or semiconductor strain gauges bonded to structural components. IC Role / Device Role / Timing Role: Each amplifier channel conditions one half-bridge leg; zero-drift preserves baseline stability during long-term mechanical stress monitoring. Use Value: 10 nV/√Hz noise floor resolves sub-microstrain changes; RFI filtering rejects motor-drive EMI in factory-floor deployments. |
| Temperature Measurement | Medical Instrumentation |
|
Use Scenario: Linearizing and amplifying output from RTDs (e.g., Pt100) and thermistors in HVAC and process control. IC Role / Device Role / Timing Role: OPA2180IDGK serves as constant-current source driver and low-noise buffer in 4-wire RTD circuits. Use Value: Input bias current ≤250 pA avoids self-heating errors in high-resistance RTD elements; rail-to-rail output interfaces directly to 16-bit SAR ADCs. |
Use Scenario: Front-end amplification for ECG, EEG, and patient monitor biosensors requiring ultra-low DC error. IC Role / Device Role / Timing Role: Dual-channel configuration supports right-leg drive (RLD) circuitry and differential lead amplification simultaneously. Use Value: 120 dB open-loop gain enables stable 1000× gain with <0.001% nonlinearity; 114 dB CMRR rejects 50/60 Hz mains interference without active guarding. |
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 | Lower 25 μV max offset and 0.085 μV/°C drift; higher 2 MHz GBW; same VSSOP-8 package | Better suited for <1 ppm precision systems (e.g., calibration standards); higher bandwidth supports faster settling | Select OPA2188IDR when offset drift and gain-bandwidth trade off favor long-term stability over cost |
| LTC2057HMS8#PBF | 2.5 μV max offset, 0.015 μV/°C drift; higher 3.5 MHz GBW; requires external compensation capacitor | Targeted at ultra-high-precision metrology; higher quiescent current (1.1 mA) limits battery life | Choose LTC2057HMS8#PBF only when sub-μV drift and <0.1 ppm linearity are mandatory, and layout allows compensation tuning |
Compared with OPA2180IDGK, OPA2188IDR offers superior DC specs at modest cost increase, while LTC2057HMS8#PBF delivers metrology-grade drift but demands more design effort and power - making OPA2180IDGK the optimal balance for industrial sensor signal chains requiring proven reliability and ease of use.
Availability
OPA2180IDGK is available at Aetrix Electronics and suitable for bridge amplifiers, strain gauge interfaces, and temperature measurement systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2180IDGK 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 decades of expertise in precision amplifiers and industrial signal chain solutions.
The OPAx180 family was designed specifically for high-accuracy, low-drift sensor signal conditioning in harsh environments - targeting applications where offset stability over time and temperature outweighs raw speed or ultra-low power.
FAQ
What is the operating temperature range for the OPA2180IDGK?
The OPA2180IDGK is specified from –40°C to +105°C, distinct from the OPA180 and OPA4180 variants which extend to +125°C. This rating is confirmed in the device comparison table and Recommended Operating Conditions section of the SBOS584E datasheet, and applies to both SOIC-8 and VSSOP-8 (DGK) packages.
Does the OPA2180IDGK support single-supply operation?
Yes, the OPA2180IDGK supports true single-supply operation from 4 V to 36 V (equivalent to ±2 V to ±18 V). Its input common-mode range includes the negative rail, and its rail-to-rail output swings within 250 mV of either supply - enabling direct interfacing with 3.3-V or 5-V ADCs without level-shifting circuitry.
What is the maximum capacitive load the OPA2180IDGK can drive stably?
The OPA2180IDGK is characterized to drive up to 1 nF capacitive load without requiring external compensation, as stated in the Electrical Characteristics table. For loads exceeding 100 pF, small-signal overshoot increases gradually - Figure 10 and Figure 11 in the datasheet show measured response up to 1000 pF with controlled ringing.
How does the zero-drift architecture of the OPA2180IDGK reduce 1/f noise?
The OPA2180IDGK combines auto-zeroing and chopper stabilization: the chopper modulates the input signal to shift 1/f noise out of band, while the auto-zero path continuously corrects residual offset. This dual technique achieves "very low 1/f noise" and 0.25 μVPP peak-to-peak noise from 0.1 Hz to 10 Hz - verified in Figure 5 of the SBOS584E datasheet.
Is the OPA2180IDGK pin-compatible with other dual op amps in VSSOP-8?
No - the OPA2180IDGK uses a nonstandard pinout: OUT A (pin 1), –IN A (pin 2), +IN A (pin 3), V– (pin 4), +IN B (pin 5), –IN B (pin 6), OUT B (pin 7), V+ (pin 8). This differs from industry-standard dual op amp pinouts (e.g., TL072, LM358), requiring dedicated PCB layout and not supporting drop-in replacement.
OPA2180IDGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.8V/µs
- Gain Bandwidth Product:
- 2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 250 pA
- Voltage - Input Offset:
- 15 µV
- Current - Supply:
- 450µA (x2 Channels)
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2180IDGK FAQ
1.How can I place an order for OPA2180IDGK through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2180IDGK 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 OPA2180IDGK reliable?
The price and inventory of OPA2180IDGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2180IDGK is usually 5 days.
3.What payment methods are accepted for OPA2180IDGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2180IDGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2180IDGK?
OPA2180IDGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2180IDGK 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 OPA2180IDGK?
For technical support, including OPA2180IDGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2180IDGK requirements.
6.How does Aetrix verify that OPA2180IDGK is sourced from the original manufacturer or authorized distributors?
All OPA2180IDGK 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 OPA2180IDGK meets industry standards.
7.What is the process for return or replacement of OPA2180IDGK?
All OPA2180IDGK units undergo pre-shipment inspection (PSI). If there is an issue with OPA2180IDGK, 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 OPA2180IDGK part is unused and in its original packaging.
Return procedure for OPA2180IDGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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