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Texas Instruments OPA140AIDGKT
- Part No.:
- OPA140AIDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA140AIDGKT.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:617
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Product details
Overview
OPA140AIDGKT from Texas Instruments is a single-channel, rail-to-rail output, JFET-input operational amplifier optimized for precision DC and low-frequency AC applications. It delivers 11-MHz unity-gain bandwidth, 20 V/μs slew rate, ±120 μV max input offset voltage, and 5.1 nV/√Hz input voltage noise density at 1 kHz - enabling high-fidelity signal conditioning in data acquisition and instrumentation front-ends.
For engineers reviewing the OPA140AIDGKT datasheet, OPA140AIDGKT pinout, OPA140AIDGKT application, or OPA140AIDGKT equivalent, this page provides verified specifications, SOIC-8 package layout, real-world use cases in metrology-grade interconnects and semiconductor test systems, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The OPA140AIDGKT uses a JFET input stage with ultra-low input bias current (≤10 pA) and no phase reversal, supporting wide common-mode input range down to V–. Its fully differential internal architecture enables stable operation with rail-to-rail output swing across ±2.25 V to ±18 V dual supplies or 4.5 V to 36 V single supply.
It achieves 126 dB open-loop gain (RL = 10 kΩ), 140 dB CMRR at 25°C, and 0.1 Hz–10 Hz integrated noise of 250 nVPP - all specified over –40°C to +125°C. The device features internal thermal shutdown and short-circuit protection with ±30 mA sink / +36 mA source current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-gain bandwidth | 11 MHz - supports stable closed-loop gain ≥1 with ≤100 ns settling time for 12-bit precision. |
| Input offset voltage | ±120 μV max - ensures ≤0.002% full-scale error in 16-bit DAC buffer applications at room temperature. |
| Offset drift | ±1 μV/°C max - contributes <±12 μV total drift over –40°C to +125°C, critical for uncalibrated lab instruments. |
| Input voltage noise | 5.1 nV/√Hz @ 1 kHz - enables sub-100 nV RMS noise floor in 10 kHz bandwidth sensor interfaces. |
| Slew rate | 20 V/μs - allows clean 10-V step response within 0.5 μs, suitable for fast-settling multiplexed DAQ channels. |
| Supply range | ±2.25 V to ±18 V dual or 4.5 V to 36 V single - powers directly from industrial 24-V rails or split ±15-V analog subsystems. |
| Quiescent current | 2 mA max per amplifier - enables low-power portable instrumentation without sacrificing DC precision. |
Pinout & Package
OPA140AIDGKT is supplied in an 8-pin SOIC (D) package with standard pin spacing (1.27 mm), JEDEC MS-012 compliant, and rated for surface-mount reflow. Thermal resistance RθJA = 160°C/W enables operation up to +125°C ambient with minimal heatsinking.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection; must be left floating or grounded - not used for signal or power routing. |
| 2 | –IN | Inverting input terminal; high-impedance JFET node with ≤10 pA bias current at 25°C. |
| 3 | +IN | Noninverting input terminal; accepts common-mode voltages down to V– – 0.1 V. |
| 4 | V– | Negative supply rail; internally connected to thermal pad in SON packages (not applicable here). |
| 5 | NC | No internal connection; electrically isolated - no routing or decoupling required. |
| 6 | OUT | Rail-to-rail output capable of sourcing 36 mA / sinking 30 mA into loads ≥2 kΩ. |
| 7 | V+ | Positive supply rail; supports up to 36 V single-supply or ±18 V dual-supply operation. |
| 8 | NC | No internal connection; unused pin - no PCB trace or via needed. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under common-mode overvoltage conditions - eliminates latch-up risk in sensor front-ends with transient excursions. |
| Rail-to-rail output | Swings within 200 mV of either rail at 2-kΩ load - maximizes dynamic range when interfacing to 16-bit ADCs with 0–5 V or ±10 V inputs. |
| Low 1/f noise | 250 nVPP (0.1–10 Hz) - reduces baseline drift in precision weigh scales and electrochemical sensor amplifiers. |
| High CMRR | 120 dB minimum over –40°C to +125°C - rejects power supply ripple and EMI in noisy industrial environments. |
| ESD robustness | ±2000 V HBM - withstands handling in non-classified assembly lines without special grounding protocols. |
Applications
| Chemistry Analyzer Front-End | Semiconductor Parametric Test |
|---|---|
Use Scenario: Amplifying low-level current signals from electrochemical sensors (e.g., pH, dissolved oxygen) with sub-picoamp bias currents and microvolt-level DC stability requirements. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current (≤10 pA) and near-zero offset drift to preserve calibration integrity over 12-month field deployments. Use Value: Enables direct digitization of sensor outputs without periodic zero-offset recalibration, reducing maintenance intervals by >3× versus bipolar-input alternatives. |
Use Scenario: Precision voltage sourcing and measurement in automated test equipment (ATE) for IC parametric characterization (e.g., IDDQ, VIL/VIH). IC Role / Device Role / Timing Role: Buffered reference driver and feedback amplifier in Kelvin-connected force-sense circuits requiring <100 nV/°C drift and 120 dB CMRR. Use Value: Achieves ±0.005% absolute accuracy over temperature without active calibration, meeting Class A ATE metrology standards. |
| DC Power Supply Monitor | Lab Instrumentation Signal Chain |
Use Scenario: Real-time sensing of output voltage and current in programmable bench power supplies with 0.01% setpoint accuracy and <10 ppm/°C long-term stability. IC Role / Device Role / Timing Role: High-side current sense amplifier and output voltage error amplifier in closed-loop regulation, operating from ±15 V rails. Use Value: Maintains <±20 μV offset contribution across –40°C to +85°C, eliminating need for per-unit thermal compensation firmware. |
Use Scenario: Input buffer and anti-alias filter driver in modular digital oscilloscopes and spectrum analyzers requiring low distortion (<–120 dB THD+N) and wide dynamic range. IC Role / Device Role / Timing Role: First-stage gain block before 16-bit SAR ADC, leveraging 11-MHz bandwidth and 20 V/μs slew rate for faithful reproduction of fast transients. Use Value: Delivers 92 dB SNR at 100 kHz with 100 Ω source impedance - exceeds ENOB requirements for 14-bit effective resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA141AIDGKT | Higher 11.5-MHz GBW but higher 6.5 nV/√Hz noise (vs. 5.1 nV/√Hz); same SOIC-8 package and pinout. | Better for wideband AC-coupled applications (e.g., audio preamps); less optimal for DC-critical sensor buffers due to increased noise floor. | Select OPA141AIDGKT only if bandwidth >11 MHz is required and 1.4 nV/√Hz noise penalty is acceptable. |
| ADA4625-1ARZ | Lower 4.2 nV/√Hz noise and 0.8 μV/°C drift, but requires ≥9 V supply and lacks rail-to-rail output (clips ~1.2 V from rails). | Suitable for battery-powered portable instruments with mid-supply references; incompatible with 5-V single-supply or rail-aligned ADC interfaces. | Choose ADA4625-1ARZ when ultra-low noise dominates design priority and supply headroom permits non-rail-to-rail operation. |
Compared with OPA140AIDGKT, OPA141AIDGKT trades marginal bandwidth gain for higher noise, while ADA4625-1ARZ improves noise and drift but sacrifices rail-to-rail output and low-voltage operation - making OPA140AIDGKT the balanced choice for general-purpose precision DC/low-frequency signal conditioning.
Availability
OPA140AIDGKT is available at Aetrix Electronics and suitable for chemistry analyzer front-ends, semiconductor parametric test systems, and DC power supply monitors requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA140AIDGKT 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 amplifiers and data converters.
The OPAx140 family was designed specifically for high-accuracy, low-drift signal conditioning in metrology, test equipment, and analytical instrumentation - prioritizing DC precision, low noise, and robustness over wide temperature and supply ranges.
FAQ
What is the maximum operating temperature range for the OPA140AIDGKT?
The OPA140AIDGKT is fully specified from –40°C to +125°C ambient temperature. All key parameters - including input offset voltage, drift, CMRR, and open-loop gain - are guaranteed across this range per TI's SBOS498F datasheet revision March 2023. This makes OPA140AIDGKT suitable for under-hood automotive modules and industrial control cabinets without derating.
Does the OPA140AIDGKT support single-supply operation?
Yes, the OPA140AIDGKT operates from a single 4.5 V to 36 V supply. Its input common-mode range extends to the negative rail (V–), and its rail-to-rail output swings within 200 mV of both supply rails at 2-kΩ load - enabling direct interfacing with 3.3 V, 5 V, or 24 V microcontroller-based systems and unipolar ADCs.
What is the typical quiescent current of the OPA140AIDGKT?
The OPA140AIDGKT draws 1.8 mA typical quiescent current per amplifier at 25°C and ±18 V supply, with a maximum of 2 mA across the full –40°C to +125°C temperature range. This low power consumption supports battery-operated portable instrumentation while maintaining high DC precision.
Is the OPA140AIDGKT pin-compatible with other op amps in the OPAx140 family?
No - the OPA140AIDGKT (single, SOIC-8) shares pinout with OPA2140 (dual) and OPA4140 (quad) only in their respective SOIC packages (8-pin for dual, 14-pin for quad), but the pin assignments differ. Specifically, OPA140AIDGKT uses pins 2/3/4/6/7 for –IN/+IN/V–/OUT/V+, whereas OPA2140 SOIC places dual channels on pins 2/3/5/6/7/8/1/4 - requiring PCB redesign for substitution.
How does the OPA140AIDGKT handle capacitive loads?
The OPA140AIDGKT remains stable with ≤100 pF capacitive load in unity-gain configuration. For heavier loads (e.g., cable-driven outputs), TI recommends adding a 50 Ω series resistor (ROUT) between OUT and the load - isolating capacitance while preserving bandwidth and minimizing overshoot, as validated in Figure 6-19 of the datasheet.
OPA140AIDGKT 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:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 11 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 1.8mA
- Current - Output / Channel:
- 36 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA140AIDGKT FAQ
1.How can I place an order for OPA140AIDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA140AIDGKT 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 OPA140AIDGKT reliable?
The price and inventory of OPA140AIDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA140AIDGKT is usually 5 days.
3.What payment methods are accepted for OPA140AIDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA140AIDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA140AIDGKT?
OPA140AIDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA140AIDGKT 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 OPA140AIDGKT?
For technical support, including OPA140AIDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA140AIDGKT requirements.
6.How does Aetrix verify that OPA140AIDGKT is sourced from the original manufacturer or authorized distributors?
All OPA140AIDGKT 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 OPA140AIDGKT meets industry standards.
7.What is the process for return or replacement of OPA140AIDGKT?
All OPA140AIDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA140AIDGKT, 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 OPA140AIDGKT part is unused and in its original packaging.
Return procedure for OPA140AIDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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