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Texas Instruments OPA2180IDGKR
- Part No.:
- OPA2180IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2180IDGKR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,573
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Product details
Overview
OPA2180IDGKR 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 max 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 OPA2180IDGKR datasheet, OPA2180IDGKR pinout, OPA2180IDGKR application, or OPA2180IDGKR equivalent, key selection criteria include its guaranteed 0.1 μV/°C drift over –40°C to +105°C, 2 MHz gain-bandwidth product with 0.8 V/μs slew rate, low 525 μA per-amplifier quiescent current, and VSSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA2180IDGKR employs TI's proprietary auto-zeroing architecture with chopper-stabilized input stage and notch-filtered error correction loop to achieve near-zero long-term drift and ultra-low 1/f noise. Its input common-mode range extends to the negative rail, supporting single-supply operation down to 4 V total supply.
Each channel features RFI-filtered inputs, 114 dB CMRR, 126 dB PSRR, and rail-to-rail output swing within 18 mV of either rail under no-load conditions - ensuring stable performance across wide temperature and supply variations without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 75 μV maximum - ensures ≤0.0075% full-scale error in 1-V span systems without calibration |
| Offset Drift | 0.1 μV/°C - guarantees <1 μV total drift over 100°C ambient change, critical for unattended instrumentation |
| Input Voltage Noise | 10 nV/√Hz at 1 kHz - enables sub-100-nV RMS noise in 10-kHz bandwidth sensor interfaces |
| Gain Bandwidth | 2 MHz - supports stable unity-gain buffering and closed-loop gains up to 20× at 100 kHz |
| Supply Range | ±2 V to ±18 V (or 4 V to 36 V) - accommodates legacy ±15 V rails and modern 3.3 V/5 V/24 V industrial supplies |
| Quiescent Current | 525 μA per amplifier - allows dual-channel precision amplification in battery-powered portable test gear |
| CMRR | 114 dB - rejects >500 kV/V common-mode interference, essential for high-side current sensing |
Pinout & Package
The OPA2180IDGKR is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm with 0.5-mm lead pitch, optimized for thermal performance and board-space efficiency in dense analog signal chains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 10 kΩ while maintaining rail-to-rail swing within 18 mV of supply rails |
| 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 for single-supply sensor biasing |
| 4 | V– | Negative power supply - referenced to system ground in single-supply configurations; supports bipolar operation |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; enables independent dual-sensor conditioning |
| 6 | –IN B | Inverting input, channel B - matched AC/DC characteristics to channel A for differential pair implementations |
| 7 | OUT B | Amplifier B output - identical drive capability and noise performance to OUT A |
| 8 | V+ | Positive power supply - accepts up to ±18 V; internal ESD protection rated to ±1.5 kV HBM |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | 0.1 μV/°C max drift eliminates manual recalibration in temperature-varying environments like factory-floor sensors |
| Rail-to-rail output | Swings within 18 mV of rails at no load - maximizes dynamic range in low-voltage 3.3 V or 5 V systems |
| RFI-filtered inputs | Integrated input filtering suppresses >30 dB of 100-MHz RF interference - critical for EMC-compliant medical devices |
| Low 1/f noise | 0.25 μVPP (0.1–10 Hz) - preserves signal integrity in slow-moving transducer outputs (e.g., load cells, thermistors) |
| High PSRR/CMRR | 126 dB PSRR and 114 dB CMRR - maintains accuracy despite noisy shared power rails or ground bounce |
Applications
| Bridge Amplifiers | Strain Gauges |
|---|---|
Use Scenario: Amplifying mV-level differential output from Wheatstone bridge pressure sensors in HVAC control panels. IC Role / Device Role / Timing Role: Dual-channel OPA2180IDGKR configures as matched in-amp front-end with gain = 1000, rejecting bridge common-mode voltage. Use Value: 0.1 μV/°C drift prevents >100 ppm zero-error drift over –25°C to +70°C operating range, eliminating field recalibration. | Use Scenario: Signal conditioning for metallic foil strain gauges mounted on structural test beams. IC Role / Device Role / Timing Role: Each OPA2180IDGKR channel buffers and amplifies half-bridge outputs before 24-bit sigma-delta ADC sampling. Use Value: 10 nV/√Hz noise density ensures ≥110 dB SNR in 10-Hz bandwidth, resolving sub-microstrain mechanical deformation. |
| Test Equipment | Temperature Measurement |
Use Scenario: Precision voltage reference buffer and current source driver in handheld multimeters. IC Role / Device Role / Timing Role: OPA2180IDGKR provides low-drift, low-noise gain stages for autoranging ohmmeter and diode test functions. Use Value: 75 μV max offset enables accurate 0.1-mV resolution on 2-V range without auto-zero circuitry, reducing BOM cost. | Use Scenario: Linearizing and amplifying output of Pt100 RTD sensors in industrial process controllers. IC Role / Device Role / Timing Role: Configured as constant-current excitation source and differential amplifier with 4-wire Kelvin sensing. Use Value: 120 dB open-loop gain ensures <0.001°C nonlinearity error over –50°C to +200°C range when paired with 0.1% precision resistors. |
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, but higher 1.2 mA quiescent current per amplifier | Better DC accuracy for metrology-grade instruments; less suitable for battery-powered portable testers | Select OPA2188IDR when absolute offset stability outweighs power budget constraints |
| LTC2057HMS8#PBF | 0.5 μV max offset, 0.03 μV/°C drift, but only 1.5 MHz GBW and requires ±5 V min supply | Superior drift performance for cryogenic or aerospace sensors; incompatible with 3.3 V single-supply designs | Choose LTC2057HMS8#PBF for ultra-stable DC gain blocks where supply headroom permits |
Compared with OPA2180IDGKR, OPA2188IDR trades 2.3× higher supply current for 3× lower drift, while LTC2057HMS8#PBF achieves 3.3× lower drift but sacrifices bandwidth and supply flexibility - making OPA2180IDGKR the optimal balance for industrial-grade 4–20 mA transmitters and portable calibration tools.
Availability
OPA2180IDGKR is available at Aetrix Electronics and suitable for bridge amplifier circuits, strain gauge interfaces, and portable test equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2180IDGKR 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 signal-chain solutions.
The OPAx180 family was designed specifically for high-accuracy, low-drift industrial measurement systems - targeting applications where traditional op-amps require frequent recalibration due to thermal drift or aging.
FAQ
What is the operating temperature range specified for the OPA2180IDGKR?
The OPA2180IDGKR is specified from –40°C to +105°C. This range is confirmed in the device's Recommended Operating Conditions table and applies to all electrical characteristics including offset voltage drift, CMRR, and quiescent current. The dual-channel variant (OPA2180) differs from the single (OPA180) and quad (OPA4180) versions, which are rated to +125°C. OPA2180IDGKR's thermal limits ensure reliable operation in industrial control cabinets and automotive under-hood environments where ambient temperatures exceed 85°C.
Does the OPA2180IDGKR support single-supply operation?
Yes, the OPA2180IDGKR supports true single-supply operation from 4 V to 36 V total supply voltage. Its input common-mode range includes the negative rail (V–), allowing direct connection of sensors referenced to ground. The rail-to-rail output swings within 18 mV of both supply rails under no-load conditions, enabling full utilization of ADC input ranges in 3.3 V or 5 V systems. This capability is explicitly verified in the Electrical Characteristics table under "Input Voltage Range" and "Voltage Output Swing from Rail" parameters.
What is the maximum capacitive load the OPA2180IDGKR can drive stably?
The OPA2180IDGKR is characterized to drive up to 1 nF capacitive load while maintaining stability, as stated in the Electrical Characteristics table under "Capacitive Load Drive." Typical small-signal overshoot remains below 10% for loads ≤100 pF (per Figure 10–11), but phase margin degrades beyond 1 nF. For heavier loads, external isolation resistance (e.g., 25 Ω in series with output) is recommended - a technique validated in the Layout Guidelines section and demonstrated in Figure 10's test setup.
How does the zero-drift architecture of the OPA2180IDGKR reduce system calibration needs?
The OPA2180IDGKR's auto-zeroing architecture actively corrects input offset and drift in real time, limiting maximum offset drift to 0.1 μV/°C over –40°C to +105°C. This reduces total drift-induced error to <10.5 μV across a 105°C span - far below typical 16-bit ADC LSBs (e.g., 76 μV for 5 V / 65536). As a result, systems using OPA2180IDGKR often eliminate periodic factory or field calibration, especially in unattended monitoring equipment like environmental data loggers and structural health sensors.
Is the OPA2180IDGKR pin-compatible with other packages of the same part number?
Yes, the OPA2180IDGKR (VSSOP-8) shares identical pinout and function mapping with the OPA2180IDR (SOIC-8) variant - both follow the standard dual-op-amp configuration: Pin 1 = OUT A, Pin 2 = –IN A, Pin 3 = +IN A, Pin 4 = V–, Pin 5 = +IN B, Pin 6 = –IN B, Pin 7 = OUT B, Pin 8 = V+. This pin compatibility is confirmed in the "Pin Configuration and Functions" section of the datasheet for OPA2180 D/DGK packages, enabling drop-in replacement between SOIC and VSSOP footprints without layout changes.
OPA2180IDGKR 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:
- 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
OPA2180IDGKR FAQ
1.How can I place an order for OPA2180IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2180IDGKR 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 OPA2180IDGKR reliable?
The price and inventory of OPA2180IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2180IDGKR is usually 5 days.
3.What payment methods are accepted for OPA2180IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2180IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2180IDGKR?
OPA2180IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2180IDGKR 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 OPA2180IDGKR?
For technical support, including OPA2180IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2180IDGKR requirements.
6.How does Aetrix verify that OPA2180IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2180IDGKR 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 OPA2180IDGKR meets industry standards.
7.What is the process for return or replacement of OPA2180IDGKR?
All OPA2180IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2180IDGKR, 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 OPA2180IDGKR part is unused and in its original packaging.
Return procedure for OPA2180IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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