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Texas Instruments OPA180IDGKR
- Part No.:
- OPA180IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA180IDGKR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,116
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Product details
Overview
OPA180IDGKR from Texas Instruments is a single-channel, zero-drift, rail-to-rail output operational amplifier optimized for precision DC-coupled signal conditioning in high-accuracy industrial and medical instrumentation. 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 stable 16-bit+ measurement accuracy in bridge amplifier and strain gauge front-ends.
For engineers reviewing the OPA180IDGKR datasheet, OPA180IDGKR pinout, OPA180IDGKR application, or OPA180IDGKR equivalent, this page provides verified specifications, validated pin functions for the MSOP-8 package, real-world use cases in temperature measurement and electronic scales, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The OPA180IDGKR employs TI's proprietary auto-zeroing architecture with dual chopper stages and notch filtering to cancel offset and 1/f noise continuously, achieving near-zero drift over time and temperature. Its input stage includes RFI-filtered inputs and supports common-mode voltage down to the negative rail.
This device operates across –40°C to +125°C with rail-to-rail output swing (within 18 mV of rails at no load), 2 MHz gain bandwidth, 0.8 V/μs slew rate, and 114 dB CMRR - making it suitable for low-frequency, high-precision amplification where long-term stability and low 0.1–10 Hz noise (250 nVPP) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 75 μV max - ensures ≤0.001% error in 12-bit systems with 1 V full-scale input |
| Offset Drift | 0.1 μV/°C - maintains <1 μV total drift over 100°C ambient change |
| Input Voltage Noise | 10 nV/√Hz at 1 kHz - enables resolution below 1 μV in bandwidth-limited sensor interfaces |
| Open-Loop Gain | 120 dB - supports ≥1000 V/V closed-loop gain with <0.01% gain error |
| Supply Range | ±2 V to ±18 V (or 4 V to 36 V single-supply) - compatible with industrial 24 V rails and battery-powered 5 V systems |
| Quiescent Current | 525 μA max per amplifier - allows low-power operation in always-on precision monitoring nodes |
| CMRR | 114 dB - rejects >500 kV/V common-mode interference in noisy plant-floor environments |
Pinout & Package
The OPA180IDGKR is housed in an 8-pin MSOP (DGK) package measuring 3.00 mm × 3.00 mm, with exposed thermal pad for enhanced power dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - rail-to-rail capable, drives 10 kΩ load within 300 mV of supply rails |
| 2 | –IN | Inverting input - high-impedance node (10¹² Ω || 9.5 pF) for feedback network connection |
| 3 | +IN | Noninverting input - accepts signals down to V– rail; RFI-filtered for EMI robustness |
| 4 | V– | Negative supply terminal - connects to ground or negative rail; supports single- or dual-supply operation |
| 5 | NC | No internal connection - must be left unconnected or tied to ground for mechanical stability |
| 6 | OUT | Not applicable - OPA180IDGKR is single-channel; pin 6 is NC per DGK pinout |
| 7 | V+ | Positive supply terminal - accepts up to ±18 V; PSRR of 126 dB suppresses supply ripple |
| 8 | NC | No internal connection - must be left unconnected or tied to ground |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Continuous auto-zeroing eliminates thermal and time-dependent offset drift, enabling calibration-free operation over 10+ years |
| Rail-to-rail output | Swings within 18 mV of V+ and V– at no load - maximizes dynamic range in low-voltage data acquisition systems |
| Low 0.1–10 Hz noise | 250 nVPP - preserves signal integrity in DC-coupled thermocouple and RTD amplifiers |
| RFI-filtered inputs | Integrated input filtering attenuates >30 dB of 100 MHz–2 GHz RF interference - critical for EMC-compliant industrial designs |
| High PSRR & CMRR | 126 dB PSRR and 114 dB CMRR - maintains accuracy in shared-supply systems and high-common-mode-noise environments |
Applications
| Bridge Amplifiers | Strain Gauges |
|---|---|
|
Use Scenario: Amplifying low-level differential outputs from Wheatstone bridges in load cells and pressure sensors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with matched input impedance and ultra-low drift. Use Value: 75 μV max offset and 0.1 μV/°C drift prevent false zero-shift in unattended industrial weighing systems. |
Use Scenario: Signal conditioning for metallic foil or semiconductor strain gauges in structural health monitoring. IC Role / Device Role / Timing Role: Low-noise, high-PSRR gain stage converting microstrain-induced resistance changes into clean voltage signals. Use Value: 10 nV/√Hz noise density and 250 nVPP 0.1–10 Hz noise enable sub-microstrain resolution without external filtering. |
| Temperature Measurement | Electronic Scales |
|
Use Scenario: Linearizing and amplifying outputs from RTDs (e.g., PT100) and thermistors in HVAC and process control. IC Role / Device Role / Timing Role: Precision voltage follower and buffer driving ADC reference inputs with minimal self-heating error. Use Value: Input bias current of 250 pA typical avoids significant voltage drop across high-resistance RTD leads. |
Use Scenario: Front-end amplification in digital kitchen and laboratory scales using microvolt-level load cell outputs. IC Role / Device Role / Timing Role: Stable, low-drift gain block feeding sigma-delta ADCs with 24-bit resolution. Use Value: 120 dB open-loop gain ensures <0.0005% gain nonlinearity over full-scale range, meeting OIML Class III requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA188IDBVR | Lower 25 μV max offset and 0.085 μV/°C drift; same 2 MHz GBW but higher 1.2 mA quiescent current | Better for metrology-grade calibration equipment requiring <0.5 μV total drift; less suitable for battery-powered nodes | Select OPA188IDBVR when absolute offset stability outweighs power budget constraints |
| OPA333AIDBVR | 10 μV max offset, 0.05 μV/°C drift, but only 0.35 MHz GBW and 5.5 V max supply | Ideal for low-voltage, low-bandwidth portable medical sensors (e.g., pulse oximeters); not rated for 24 V industrial rails | Choose OPA333AIDBVR for sub-5 V, ultra-low-drift portable applications where bandwidth ≤350 kHz suffices |
Compared with OPA180IDGKR, OPA188IDBVR offers superior DC precision at higher power cost, while OPA333AIDBVR trades bandwidth and voltage range for ultra-low offset in compact battery systems - neither is pin-compatible, requiring layout revision for substitution.
Availability
OPA180IDGKR 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 OPA180IDGKR 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 over 50 years of innovation in precision signal chain components.
The OPAx180 family was designed specifically for high-stability, low-drift amplification in industrial process control, test equipment, and medical instrumentation where long-term calibration integrity is mandatory.
FAQ
What is the operating temperature range for the OPA180IDGKR?
The OPA180IDGKR is specified from –40°C to +125°C, supporting deployment in harsh industrial environments such as motor control cabinets and outdoor process transmitters. This extended range is confirmed in the Electrical Characteristics table (Section 7.7) and Revision History (Page 1), where the max operating temperature was updated from +105°C to +125°C in Revision E. The OPA180IDGKR maintains its 75 μV max offset and 0.1 μV/°C drift across this full range.
Does the OPA180IDGKR support single-supply operation?
Yes, the OPA180IDGKR supports true single-supply operation from 4 V to 36 V, with input common-mode range extending to the negative rail (V–) and rail-to-rail output swing. Per Section 3 (Description) and Recommended Operating Conditions (Section 7.3), it functions with V– grounded and V+ at 5 V, 12 V, or 24 V - enabling direct interface with microcontrollers and SAR or sigma-delta ADCs without level-shifting circuitry.
What is the meaning of "NC" pins on the OPA180IDGKR DGK package?
Pins 1, 5, and 8 on the OPA180IDGKR's 8-pin MSOP (DGK) package are No Connect (NC) terminals with no internal bond wire or silicon connection. As stated in the Pin Functions table (Page 6), these pins must remain unconnected or may be tied to ground for mechanical reinforcement - floating NC pins do not affect electrical performance but improve solder joint reliability in automated assembly.
How does the OPA180IDGKR achieve low 1/f noise?
The OPA180IDGKR uses TI's dual-chopper auto-zero architecture with notch filtering (shown in Figure 8.2's functional block diagram) to sample and cancel low-frequency offset and 1/f noise in real time. This results in 250 nVPP peak-to-peak noise from 0.1 Hz to 10 Hz - verified in Figure 5 and Section 7.7 - enabling stable DC amplification without external filtering in precision sensor interfaces like RTD bridges.
Is the OPA180IDGKR pin-compatible with other devices in the OPAx180 family?
No, the OPA180IDGKR (single-channel, DGK package) is not pin-compatible with OPA2180 (dual-channel) or OPA4180 (quad-channel) variants. While all share the same core architecture, their pinouts differ fundamentally: OPA180IDGKR has 3 active pins (OUT, –IN, +IN) plus V+, V–, and NCs, whereas OPA2180 DGK dedicates pins to two independent channels. Substitution requires PCB redesign - confirmed by separate Pin Configuration diagrams for each device (Pages 5–7).
OPA180IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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:
- 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-VSSOP
OPA180IDGKR FAQ
1.How can I place an order for OPA180IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA180IDGKR 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 OPA180IDGKR reliable?
The price and inventory of OPA180IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA180IDGKR is usually 5 days.
3.What payment methods are accepted for OPA180IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA180IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA180IDGKR?
OPA180IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA180IDGKR 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 OPA180IDGKR?
For technical support, including OPA180IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA180IDGKR requirements.
6.How does Aetrix verify that OPA180IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA180IDGKR 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 OPA180IDGKR meets industry standards.
7.What is the process for return or replacement of OPA180IDGKR?
All OPA180IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA180IDGKR, 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 OPA180IDGKR part is unused and in its original packaging.
Return procedure for OPA180IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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