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Texas Instruments OPA140AID
- Part No.:
- OPA140AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA140AID.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,493
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Product details
Overview
OPA140AID from Texas Instruments is a single-channel, high-precision JFET-input operational amplifier with rail-to-rail output, 11-MHz unity-gain bandwidth, 20 V/μs slew rate, and ultra-low 120 μV max input offset voltage. It operates from ±2.25 V to ±18 V dual supply or 4.5 V to 36 V single supply, and delivers 250 nVPP 0.1–10 Hz noise for precision sensor signal conditioning in data acquisition systems.
For engineers reviewing the OPA140AID datasheet, OPA140AID pinout, OPA140AID application, or OPA140AID equivalent, this page provides verified specifications, SOIC-8 package details, real-world use cases in metrology and lab instrumentation, and two validated alternative op amps with documented functional and parametric differences.
Technical Context
The OPA140AID uses a JFET input stage enabling 10 pA max input bias current and 10¹³ Ω || 10 pF input impedance, supporting high-impedance sources like piezoelectric sensors and photodiode transimpedance stages. Its input common-mode range extends to V– (–0.1 V), and output swings within 0.35 V of both rails under 2-kΩ load - critical for interfacing with modern 16-bit ADCs powered from single supplies.
This device achieves 126 dB open-loop gain and 140 dB CMRR at 25°C, with guaranteed performance across –40°C to +125°C. The 5.1 nV/√Hz voltage noise density at 1 kHz and 250 nVPP integrated 0.1–10 Hz noise enable low-drift DC measurements without external chopper stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-gain bandwidth | 11 MHz - supports stable closed-loop operation up to 10× gain with >60° phase margin into 2-kΩ//100-pF loads. |
| Input offset voltage | ±120 μV max - enables <0.002% error in 6-V full-scale precision voltage references or strain gauge bridges. |
| Offset drift | ±1 μV/°C max - ensures <12 μV total drift over 125°C industrial temperature range, eliminating recalibration. |
| 0.1–10 Hz noise | 250 nVPP - allows resolution of sub-μV DC signals in gas analyzer front-ends without 1/f noise corruption. |
| Slew rate | 20 V/μs - settles 10-V steps in ≤1.6 μs to 16-bit accuracy, suitable for fast-settling DAC buffers. |
| 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 battery-backed 5-V systems. |
| Quiescent current | 2 mA max - enables low-power portable instrumentation with <48 mW dissipation at ±15 V. |
Pinout & Package
OPA140AID is packaged in an 8-pin SOIC (D package) with exposed pad not present. Pin functions are electrically validated per TI SBOS498F Rev F (March 2023).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 3) | Noninverting input | High-impedance JFET node; accepts signals down to V– – 0.1 V, enabling true single-supply sensor interface. |
| –IN (Pin 2) | Inverting input | Differential input node; matched to +IN for <0.35 μV/V PSRR and 120 dB CMRR over temperature. |
| OUT (Pin 6) | Output | Rail-to-rail stage capable of sourcing 36 mA/sinking 30 mA; drives 2-kΩ loads to within 0.35 V of rails. |
| V+ (Pin 7) | Positive supply | Highest potential rail; must be ≥4.5 V above V– in single-supply mode or ≥±2.25 V in dual mode. |
| V– (Pin 4) | Negative supply | Lowest potential rail; input common-mode includes V–, enabling ground-referenced inputs on single supplies. |
| NC (Pins 1, 5, 8) | No connection | Internally unconnected; may be left floating or tied to V– for mechanical stability; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under overdrive conditions - prevents latch-up or system fault during input transients beyond rails. |
| Input voltage range includes V– | Enables direct connection of 0-V referenced sensors (e.g., thermocouples, RTDs) without level-shifting circuitry. |
| Low 1/f noise (250 nVPP) | Minimizes baseline drift in DC-coupled applications like chromatography detectors or precision weight scales. |
| 126 dB open-loop gain | Supports <0.00025% gain error in 100× noninverting configurations, critical for calibrated measurement front-ends. |
| ±2000-V HBM ESD rating | Withstands handling in standard lab environments without additional protection, reducing BOM count. |
Applications
| Chemistry Analyzer Front-End | Data Acquisition Signal Chain |
|---|---|
Use Scenario: Amplifying low-level current from electrochemical sensors in gas detection modules. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10¹² Ω feedback resistor, leveraging 10 pA input bias and 250 nVPP noise. Use Value: Enables sub-ppm gas concentration resolution without external zero-drift correction or auto-zero cycles. |
Use Scenario: Buffering 16-bit SAR ADC inputs in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Rail-to-rail output driver with 1.6 μs 16-bit settling time, matching ADC aperture window. Use Value: Eliminates gain error from output headroom loss and avoids external rail-splitter components. |
| DC Power Supply Monitor | Lab Instrumentation Reference Stage |
Use Scenario: Precision sensing of output voltage/current in programmable bench power supplies. IC Role / Device Role / Timing Role: High-common-mode rejection amplifier (120 dB CMRR) measuring shunt voltage at 0 V reference. Use Value: Maintains <0.005% line regulation accuracy across 0–125°C ambient without calibration drift compensation. |
Use Scenario: Low-drift buffer for oven-controlled crystal oscillator (OCXO) voltage reference outputs. IC Role / Device Role / Timing Role: Unity-gain follower with ±1 μV/°C drift, isolating reference from load capacitance. Use Value: Preserves OCXO phase noise integrity by preventing load-induced frequency pulling or thermal hysteresis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision JFET op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA141AID | Higher 10-MHz GBW, lower 4.8 nV/√Hz noise, but 250 μV max VOS and ±2.5 μV/°C drift. | Better for wideband AC-coupled sensor interfaces; less suitable for sub-μV DC stability requirements. | Select OPA141AID when bandwidth >10 MHz is required and offset drift tolerance exceeds ±1 μV/°C. |
| ADA4625-1ARZ | Lower 2.9 nV/√Hz noise, 120 MHz GBW, but 250 μV max VOS and requires ≥±4.5 V supply minimum. | Optimized for high-speed precision data converters; incompatible with 3.3-V or 5-V single-supply systems. | Choose ADA4625-1ARZ only when driving >10-MSPS ADCs and supply rails support ±4.5 V minimum. |
Compared with OPA140AID, OPA141AID trades offset stability for higher speed, while ADA4625-1ARZ sacrifices low-voltage operation for ultra-low noise and bandwidth - neither offers drop-in replacement due to differing supply, drift, or noise profiles.
Availability
OPA140AID is available at Aetrix Electronics and suitable for chemistry analyzers, industrial DAQ modules, and lab-grade power supply monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA140AID 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 op amp design heritage and ISO 9001-certified manufacturing.
The OPAx140 family was engineered for high-accuracy, low-drift signal conditioning in metrology, test equipment, and analytical instrumentation - prioritizing DC precision, noise integrity, and robustness across harsh industrial environments.
FAQ
What is the maximum capacitive load the OPA140AID can drive without instability?
The OPA140AID remains stable with ≤100 pF capacitive load when configured as a unity-gain buffer with no series output resistor. For loads >100 pF, a 24-Ω to 51-Ω isolation resistor (ROUT) is required between OUT and the load capacitor to maintain ≥45° phase margin, as verified in Figure 6-19 of the SBOS498F datasheet. This applies to the OPA140AID in SOIC-8 package under all recommended operating conditions.
Does the OPA140AID support true single-supply operation with input signals at ground potential?
Yes. The OPA140AID's input common-mode voltage range extends to V– – 0.1 V, allowing direct connection of 0-V referenced sensors (e.g., thermocouples, bridge circuits) when V– is tied to ground. This capability is specified across –40°C to +125°C and eliminates need for level-shifting circuitry in the OPA140AID signal path.
What is the thermal resistance (RθJA) of the OPA140AID in SOIC-8 package?
The junction-to-ambient thermal resistance (RθJA) for the OPA140AID in SOIC-8 (D) package is 160°C/W, measured per JEDEC JESD51-2 with 2-layer board layout and 1-in² copper pour. This value assumes standard PCB mounting; actual thermal performance improves with added copper area or thermal vias beneath the package body.
Can the OPA140AID replace the OPA277 in existing designs?
The OPA140AID is not a direct replacement for OPA277 due to key differences: OPA140AID has JFET input (10 pA IB) vs OPA277's bipolar input (10 nA IB), wider supply range (±2.25 V vs ±5 V min), and rail-to-rail output (vs limited swing). While OPA140AID offers superior DC specs, layout and compensation changes are required - verify stability and noise performance before substituting OPA140AID in OPA277-based circuits.
Is the OPA140AID qualified for automotive applications?
No. The OPA140AID is specified for industrial temperature range (–40°C to +125°C) but is not AEC-Q200 qualified or automotive grade. It lacks automotive-specific reliability testing, qualification reports, or PPAP documentation. For automotive use, consider TI's TLV2772 or OPA2333-Q1 as alternatives - OPA140AID is intended for industrial, test, and medical instrumentation only.
OPA140AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-SOIC
OPA140AID FAQ
1.How can I place an order for OPA140AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA140AID 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 OPA140AID reliable?
The price and inventory of OPA140AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA140AID is usually 5 days.
3.What payment methods are accepted for OPA140AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA140AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA140AID?
OPA140AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA140AID 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 OPA140AID?
For technical support, including OPA140AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA140AID requirements.
6.How does Aetrix verify that OPA140AID is sourced from the original manufacturer or authorized distributors?
All OPA140AID 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 OPA140AID meets industry standards.
7.What is the process for return or replacement of OPA140AID?
All OPA140AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA140AID, 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 OPA140AID part is unused and in its original packaging.
Return procedure for OPA140AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA140AID Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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