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Texas Instruments OPA2180IDR
- Part No.:
- OPA2180IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2180IDR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,991
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Product details
Overview
OPA2180IDR 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 offset voltage, 0.1 μV/°C drift, 10 nV/√Hz input voltage noise at 1 kHz, 120 dB open-loop gain, and operates from ±2 V to ±18 V supplies. It is used in strain gauge interfaces and high-resolution electronic scales where long-term stability and low 1/f noise are critical.
For engineers reviewing the OPA2180IDR datasheet, OPA2180IDR pinout, OPA2180IDR application, or OPA2180IDR equivalent, key selection criteria include its guaranteed 0.1 μV/°C drift over –40°C to +105°C, rail-to-rail output swing within 250 mV of rails (at 10 kΩ), PSRR of 126 dB, CMRR of 114 dB, and dual-channel VSSOP-8 packaging with validated thermal performance (RθJA = 159.3°C/W).
Technical Context
The OPA2180IDR employs TI's proprietary auto-zeroing architecture with chopper-stabilized front-end and notch-filtered correction path to achieve near-zero drift and ultra-low 1/f noise. Its dual-channel design shares no internal circuitry between amplifiers, ensuring channel separation >100 dB up to 1 MHz.
It features RFI-filtered inputs, input common-mode range extending to the negative rail, and stable operation with capacitive loads up to 1 nF. The device supports single-supply (4.5 V to 36 V) or split-supply (±2.25 V to ±18 V) configurations without performance degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| 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 range, critical for uncalibrated temperature-invariant designs |
| Input Voltage Noise | 10 nV/√Hz at 1 kHz - enables resolution of sub-μV signals in low-frequency sensor interfaces |
| Open-Loop Gain | 120 dB - provides ≥10⁶ closed-loop accuracy for gain-setting resistors with 0.1% tolerance |
| Supply Range | ±2 V to ±18 V - supports wide industrial supply rails including ±15 V legacy systems and ±5 V modern controllers |
| Quiescent Current | 525 μA per amplifier max - allows dual-channel precision amplification in power-constrained 24-V loop-powered transmitters |
| CMRR | 114 dB - rejects >500 kV/V common-mode interference, essential for bridge circuits with millivolt outputs |
Pinout & Package
The OPA2180IDR is packaged in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, optimized for space-constrained PCB layouts while maintaining thermal performance (RθJA = 159.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail capable, drives 10 kΩ load to within 250 mV of either supply rail |
| 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, enabling single-supply sensor biasing |
| 4 | V– | Negative supply pin - shared reference for both amplifiers; must be decoupled locally with 0.1 μF ceramic |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; supports independent differential sensing paths |
| 6 | –IN B | Inverting input, channel B - matched input impedance and bias current (<1 nA) to channel A for common-mode rejection |
| 7 | OUT B | Amplifier B output - identical AC/DC specs to OUT A; enables dual-sensor or signal+reference architectures |
| 8 | V+ | Positive supply pin - accepts up to ±18 V; PSRR of 126 dB minimizes supply ripple coupling into output |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | 0.1 μV/°C max drift eliminates calibration drift in medical instrumentation over full temperature range |
| Rail-to-rail output | Swings to within 250 mV of rails at 10 kΩ - maximizes dynamic range in 3.3 V or 5 V microcontroller ADC interfaces |
| RFI-filtered inputs | Integrated EMI rejection filter suppresses >60 dB of 100-MHz RF interference - critical for factory-floor sensor nodes |
| Low 1/f noise | 0.25 μVPP (0.1–10 Hz) - preserves signal integrity in slow-response temperature and pressure measurements |
| High PSRR & CMRR | 126 dB PSRR / 114 dB CMRR - maintains accuracy in noisy industrial environments with shared ground and supply lines |
Applications
| Bridge Amplifier | Strain Gauge Interface |
|---|---|
Use Scenario: Amplifying mV-level differential output from Wheatstone bridge in load cells and pressure sensors. IC Role / Device Role / Timing Role: Dual-channel OPA2180IDR configures as two matched instrumentation amplifier stages - one for bridge excitation regulation, one for signal gain. Use Value: 75 μV offset and 0.1 μV/°C drift ensure ≤0.01% full-scale error across –40°C to +85°C, eliminating recalibration in field-deployed weighing systems. |
Use Scenario: Conditioning output of bonded foil strain gauges in structural health monitoring systems. IC Role / Device Role / Timing Role: OPA2180IDR serves as low-noise, high-CMRR front-end amplifier with matched channels for ratiometric reference and signal paths. Use Value: 10 nV/√Hz noise density and 114 dB CMRR enable detection of <1 με microstrain changes in noisy plant-floor environments. |
| Electronic Scale Front-End | Precision Temperature Measurement |
Use Scenario: Signal chain for high-resolution digital kitchen or laboratory scales using 24-bit ΣΔ ADCs. IC Role / Device Role / Timing Role: OPA2180IDR provides gain and filtering ahead of ADC; second channel buffers reference voltage for ratiometric conversion. Use Value: Dual-channel matching and 0.25 μVPP 0.1–10 Hz noise preserve 22-bit effective resolution without software averaging. |
Use Scenario: Linearizing and amplifying output of platinum RTD (PT100/1000) sensors in HVAC and process control. IC Role / Device Role / Timing Role: OPA2180IDR implements constant-current excitation and low-drift difference amplification in 3-wire or 4-wire configurations. Use Value: 120 dB open-loop gain and 126 dB PSRR maintain ±0.02°C accuracy over 100°C span without external trimming components. |
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; same VSSOP-8 package; 2 MHz GBW vs 2 MHz | Better DC precision but higher cost; preferred for metrology-grade calibrators requiring <0.5 μV drift | Select OPA2188IDR when absolute offset stability outweighs quiescent current budget (560 μA vs 525 μA) |
| LTC2057HMS8#PBF | 0.25 μV/°C max drift; 1.6 MHz GBW; higher 1.6 nV/√Hz noise; MSOP-8 package | Higher noise limits use in sub-μV sensor interfaces; better suited for moderate-precision motor control feedback | Choose LTC2057HMS8#PBF only if existing layout uses MSOP-8 and 1.6 nV/√Hz noise is acceptable |
Compared with OPA2180IDR, OPA2188IDR offers superior drift performance at higher cost and current, while LTC2057HMS8#PBF trades drift and noise for broader availability and different supply flexibility - neither is pin-compatible, requiring layout revision.
Availability
OPA2180IDR is available at Aetrix Electronics and suitable for bridge amplifier circuits, strain gauge signal chains, electronic scale front-ends, precision temperature measurement systems, and transducer interfaces requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2180IDR 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 applications - targeting bridge sensors, RTDs, load cells, and portable test equipment where long-term calibration stability is non-negotiable.
FAQ
What is the operating temperature range specified for the OPA2180IDR?
The OPA2180IDR is specified from –40°C to +105°C. This range is explicitly defined in the datasheet's Recommended Operating Conditions table and applies to all key DC parameters including offset voltage, drift, PSRR, and CMRR. The device remains functional beyond this range but guaranteed specifications apply only within –40°C to +105°C.
Does the OPA2180IDR support single-supply operation?
Yes, the OPA2180IDR supports true single-supply operation from 4.5 V to 36 V. Its input common-mode range includes the negative rail (V–), and its rail-to-rail output swings within 250 mV of both supply rails under 10 kΩ load - enabling direct interfacing with 3.3 V or 5 V microcontrollers without level-shifting circuitry.
What is the maximum capacitive load the OPA2180IDR can drive stably?
The OPA2180IDR is characterized to drive up to 1 nF capacitive load while maintaining stability, as confirmed in the Electrical Characteristics table under "Capacitive load drive." For loads exceeding 100 pF, TI recommends adding a small series resistor (typically 25 Ω to 50 Ω) between the output and the capacitor to ensure phase margin retention.
How does the OPA2180IDR's 0.1 μV/°C drift compare to standard precision op amps?
The OPA2180IDR's 0.1 μV/°C drift is achieved via auto-zeroing architecture - significantly lower than typical precision op amps (e.g., 1–5 μV/°C). Over a 100°C span, this translates to <10 μV total drift versus >300 μV for conventional bipolar-input amplifiers, directly enabling uncalibrated operation in field instruments.
Is the OPA2180IDR pin-compatible with other dual op amps in VSSOP-8 packages?
No, the OPA2180IDR has a unique 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). It is not pin-compatible with industry-standard dual op amps like LMV358 or TLV2462 - PCB layout must follow the OPA2180IDR-specific pin mapping.
OPA2180IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
OPA2180IDR FAQ
1.How can I place an order for OPA2180IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2180IDR 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 OPA2180IDR reliable?
The price and inventory of OPA2180IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2180IDR is usually 5 days.
3.What payment methods are accepted for OPA2180IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2180IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2180IDR?
OPA2180IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2180IDR 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 OPA2180IDR?
For technical support, including OPA2180IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2180IDR requirements.
6.How does Aetrix verify that OPA2180IDR is sourced from the original manufacturer or authorized distributors?
All OPA2180IDR 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 OPA2180IDR meets industry standards.
7.What is the process for return or replacement of OPA2180IDR?
All OPA2180IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2180IDR, 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 OPA2180IDR part is unused and in its original packaging.
Return procedure for OPA2180IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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