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Texas Instruments OPA180IDR
- Part No.:
- OPA180IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA180IDR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,886
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Product details
Overview
OPA180IDR from Texas Instruments is a single-channel, zero-drift 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, rail-to-rail output swing within 18 mV of rails, and operates from ±2 V to ±18 V supplies. It is used in strain gauge amplifiers and high-accuracy temperature measurement front-ends.
For engineers reviewing the OPA180IDR datasheet, OPA180IDR pinout, OPA180IDR application, or OPA180IDR equivalent, this page provides verified specifications, package mapping, functional context for low-drift sensor interfaces, and validated alternative options for precision op-amp selection in 4–36 V systems requiring <0.35 μV/°C drift and <250 nVPP 0.1–10 Hz noise.
Technical Context
The OPA180IDR implements TI's proprietary auto-zeroing architecture with chopper-stabilized input stage and notch-filtered feedback path to achieve near-zero drift and ultra-low 1/f noise. Its dual-stage gain block enables high open-loop gain (120 dB) while maintaining stability with capacitive loads up to 1 nF.
It features RFI-filtered inputs, input common-mode range extending to the negative rail, and rail-to-rail output capable of sourcing/sinking ±18 mA. The device is specified across –40°C to +125°C and supports both single-supply (4–36 V) and split-supply (±2 V to ±18 V) operation 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 bridge amplifier applications |
| Drift | 0.1 μV/°C - guarantees <1.25 μV total drift over full –40°C to +125°C operating range |
| Noise (0.1–10 Hz) | 250 nVPP - enables resolution better than 16-bit in low-frequency sensor readouts |
| Noise Density | 10 nV/√Hz at 1 kHz - supports clean signal acquisition in 100-kHz bandwidth applications |
| Supply Range | ±2 V to ±18 V (or 4 V to 36 V) - compatible with legacy industrial rails and modern wide-input power supplies |
| CMRR | 114 dB - rejects >500,000:1 common-mode interference in unshielded transducer wiring |
| PSRR | 126 dB - maintains DC accuracy despite ±100 mV supply ripple on ±18 V rails |
Pinout & Package
The OPA180IDR is packaged in an 8-pin SOIC (D) body measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance RθJA is 111 °C/W under standard JEDEC JESD51-7 conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive power supply | Accepts up to +18 V; must be decoupled with ≥0.1 μF ceramic capacitor near pin |
| –IN | Inverting input | High-impedance node (10¹² Ω || 9.5 pF); sensitive to PCB leakage and EMI coupling |
| +IN | Noninverting input | Extends to negative rail; enables true single-supply operation with ground-referenced sensors |
| OUT | Amplifier output | Rail-to-rail swing (within 18 mV no-load); drives 10-kΩ load with <0.01% settling in 30 μs |
| V– | Negative power supply | Accepts down to –18 V; connects to system ground in single-supply configurations |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Auto-zeroing + chopper stabilization eliminates thermal drift and 1/f noise without external calibration |
| Rail-to-rail output | Swings to within 18 mV of either supply rail-maximizes dynamic range in low-voltage data acquisition |
| RFI-filtered inputs | Integrated RC filtering suppresses >40 dB of 100-MHz EMI at IN+ and IN– pins |
| Low quiescent current | 525 μA max per amplifier-enables battery-powered precision instrumentation with >1-year runtime |
| Wide temperature range | Specified from –40°C to +125°C-supports deployment in motor control enclosures and outdoor test gear |
Applications
| Bridge Amplifier | Strain Gauge Interface |
|---|---|
Use Scenario: Amplifying mV-level differential output from full-bridge load cells in electronic scales. IC Role / Device Role / Timing Role: Primary instrumentation amplifier front-end with gain = 1000, DC-coupled, low-drift signal conditioning. Use Value: 75 μV offset and 0.1 μV/°C drift ensure ≤0.01% linearity error over temperature without recalibration. |
Use Scenario: Signal conditioning for bonded foil strain gauges in structural health monitoring systems. IC Role / Device Role / Timing Role: Low-noise, high-CMRR buffer and gain stage driving 16-bit SAR ADC inputs. Use Value: 114 dB CMRR rejects common-mode noise from long sensor cables; 250 nVPP 0.1–10 Hz noise preserves microstrain resolution. |
| Temperature Measurement | Medical Instrumentation |
Use Scenario: Linearizing and amplifying RTD (Pt100) outputs in industrial process controllers. IC Role / Device Role / Timing Role: Precision current-source driver and differential amplifier in 4-wire Kelvin configuration. Use Value: Input bias current ≤250 pA prevents self-heating errors in high-impedance RTD circuits; rail-to-rail output matches ADC reference range. |
Use Scenario: Front-end amplification of biopotential signals (ECG, EEG) in portable diagnostic devices. IC Role / Device Role / Timing Role: Ultra-low-noise, low-drift gain stage preceding anti-alias filtering and digitization. Use Value: 10 nV/√Hz noise density and 120 dB open-loop gain enable ≥100 dB SNR in 0.05–150 Hz bandwidths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA188IDR | Lower offset (25 μV max), lower drift (0.085 μV/°C), same 2 MHz GBW but higher quiescent current (1.1 mA) | Better DC accuracy required; acceptable if supply current budget allows +110% increase | Choose OPA188IDR when offset and drift dominate system error budget over power constraints. |
| LTC2057HS8#PBF | Similar 0.1 μV/°C drift, lower noise (6.5 nV/√Hz), wider supply (±1.65 V to ±18 V), but only available in SOIC-8 with different pinout | Higher sensitivity to layout-induced noise; requires revalidation of input filtering and decoupling | Choose LTC2057HS8#PBF when sub-10 nV/√Hz noise is critical and board layout can accommodate revised grounding. |
Compared with OPA180IDR, OPA188IDR improves DC precision at the cost of higher supply current, while LTC2057HS8#PBF offers lower broadband noise but demands careful PCB redesign due to non-identical pin assignment and EMI susceptibility profile.
Availability
OPA180IDR is available at Aetrix Electronics and suitable for bridge amplifiers, strain gauge interfaces, and temperature measurement systems requiring stable component supply, long-term calibration retention, and extended temperature operation.
Supply support for OPA180IDR 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 op-amps and signal-chain solutions.
The OPA180IDR belongs to TI's zero-drift op-amp family designed specifically for high-accuracy, low-drift sensor signal conditioning in industrial automation, test and measurement, and medical instrumentation where DC stability and low-frequency noise are critical.
FAQ
What is the maximum operating temperature range for the OPA180IDR?
The OPA180IDR is fully specified from –40°C to +125°C. All key parameters-including offset voltage drift (0.1 μV/°C), CMRR (114 dB), and open-loop gain (120 dB)-are guaranteed across this full industrial temperature range, making it suitable for under-hood automotive modules and high-temperature factory-floor equipment where thermal stability is essential. This rating applies to the SOIC-8 (D) package variant OPA180IDR.
Does the OPA180IDR support single-supply operation?
Yes, the OPA180IDR supports true single-supply operation from 4 V to 36 V. Its input common-mode range extends to the negative rail (V–), and its rail-to-rail output swings within 18 mV of both supply rails under no-load conditions. This allows direct interfacing with ground-referenced sensors like thermocouples or resistive bridges without level-shifting circuitry-enabling simplified, low-component-count designs in battery-powered or 5-V/12-V industrial systems.
What is the typical input bias current of the OPA180IDR?
The OPA180IDR has a typical input bias current of 250 pA at 25°C, with a maximum of ±1.7 nA over the full –40°C to +125°C temperature range. This ultra-low bias current minimizes voltage errors in high-impedance sensor interfaces such as piezoresistive pressure sensors or pH electrodes, where even nanoamp-level currents can induce significant offset shifts. The specification is confirmed in TI's SBOS584E datasheet Section 7.7.
Can the OPA180IDR drive capacitive loads?
Yes, the OPA180IDR is characterized to drive capacitive loads up to 1 nF while maintaining stability and specified settling time (30 μs to 0.01%). Its internal compensation and robust phase margin allow direct connection to ADC input capacitors, long cables, or filtering networks without external isolation resistors-reducing bill-of-materials and preserving signal integrity in multi-stage precision signal chains containing the OPA180IDR.
How does the OPA180IDR achieve zero-drift performance?
The OPA180IDR achieves zero-drift performance using TI's proprietary auto-zeroing architecture combined with chopper stabilization. It continuously measures and corrects input offset voltage in real time via internal sampling and correction circuitry, while the chopper stage suppresses 1/f noise. This dual technique delivers 0.1 μV/°C drift and 250 nVPP 0.1–10 Hz noise-verified across –40°C to +125°C-without requiring external calibration or trimming components in the final OPA180IDR design.
OPA180IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- 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
- Current - Output / Channel:
- -
- 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
OPA180IDR FAQ
1.How can I place an order for OPA180IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA180IDR 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 OPA180IDR reliable?
The price and inventory of OPA180IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA180IDR is usually 5 days.
3.What payment methods are accepted for OPA180IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA180IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA180IDR?
OPA180IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA180IDR 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 OPA180IDR?
For technical support, including OPA180IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA180IDR requirements.
6.How does Aetrix verify that OPA180IDR is sourced from the original manufacturer or authorized distributors?
All OPA180IDR 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 OPA180IDR meets industry standards.
7.What is the process for return or replacement of OPA180IDR?
All OPA180IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA180IDR, 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 OPA180IDR part is unused and in its original packaging.
Return procedure for OPA180IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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