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Texas Instruments OPA4140AID
- Part No.:
- OPA4140AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4140AID.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:778
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Product details
Overview
OPA4140AID from Texas Instruments is a quad-channel, rail-to-rail output, JFET-input operational amplifier optimized for precision DC-coupled signal conditioning. 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 amplification in data acquisition front-ends interfacing with 16-bit ADCs.
For engineers reviewing the OPA4140AID datasheet, OPA4140AID pinout, OPA4140AID application, or OPA4140AID equivalent, key selection criteria include ultra-low 1/f noise (250 nVPP, 0.1 Hz to 10 Hz), 1 μV/°C max offset drift, single-supply operation from 4.5 V to 36 V, and guaranteed performance across –40°C to +125°C industrial temperature range.
Technical Context
The OPA4140AID implements a fully differential JFET input stage with matched P-channel devices, delivering femtoampere-level input bias current (≤10 pA) and exceptional common-mode rejection (120–140 dB). Its architecture supports rail-to-rail output swing within 350 mV of each supply rail under 2-kΩ load while maintaining stable phase response - critical for driving SAR ADC reference buffers without settling error.
Internal thermal shutdown and output current limiting (±30 mA sink/source) protect against overload conditions. The device operates with no phase reversal over full input common-mode range (V– – 0.1 V to V+ – 3.5 V), eliminating latch-up risk in high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - enables compact multi-channel instrumentation without inter-device matching variance. |
| Unity-gain bandwidth | 11 MHz - supports fast-settling gain stages for 100-kSPS+ data acquisition systems. |
| Input offset voltage | ±120 μV max - ensures ≤0.002% gain error in 12-bit systems without calibration. |
| Offset drift | 1 μV/°C max - limits drift-induced error to <1 LSB over 80°C ambient shift in 16-bit designs. |
| Input voltage noise | 250 nVPP (0.1–10 Hz) - preserves signal integrity in low-frequency sensor amplification (e.g., strain gauges, thermopiles). |
| Supply range | Single: 4.5–36 V; Dual: ±2.25–±18 V - compatible with industrial 24-V rails and battery-powered portable instruments. |
| Quiescent current | 2 mA per amplifier max - enables four-channel precision amplification at <8 mA total, suitable for power-constrained modules. |
Pinout & Package
OPA4140AID is supplied in a 14-pin SOIC (D package) with exposed pad not present. Pin functions are defined per channel A–D and shared power rails; all pins are electrically connected and functional - no NC (no-connect) terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance JFET node; accepts signals down to V– – 0.1 V for true single-supply sensor interfacing. |
| –IN A (Pin 2) | Inverting input, Channel A | Matches +IN A in bias current and offset; enables precision differential gain configurations. |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable: swings within 350 mV of V– or V+ under 2-kΩ load - drives ADC inputs directly. |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input identical to +IN A; supports parallel channel processing without crosstalk degradation. |
| –IN B (Pin 6) | Inverting input, Channel B | Matched to +IN B; maintains channel-to-channel gain accuracy within 0.02 µV/V dc separation spec. |
| OUT B (Pin 7) | Output, Channel B | Full rail-to-rail swing; isolated output stage prevents loading effects on adjacent channels. |
| +IN C (Pin 10) | Noninverting input, Channel C | Valid input node; verified functional per datasheet Table 5-2 and electrical test coverage. |
| –IN C (Pin 9) | Inverting input, Channel C | Valid input node; supports independent third channel with same precision specs as A/B. |
| OUT C (Pin 8) | Output, Channel C | Valid output node; delivers full 20 V/μs slew rate and 11-MHz bandwidth per channel. |
| +IN D (Pin 12) | Noninverting input, Channel D | Valid input node; completes quad-channel set with identical AC/DC performance. |
| –IN D (Pin 13) | Inverting input, Channel D | Valid input node; enables fourth independent precision gain path. |
| OUT D (Pin 14) | Output, Channel D | Valid output node; fully specified for rail-to-rail swing and 16-bit settling (1.6 μs). |
| V+ (Pin 4) | Positive supply | Accepts up to 36 V single supply or +18 V dual supply; powers all four amplifiers simultaneously. |
| V– (Pin 11) | Negative supply | Accepts ground (single-supply) or –18 V (dual); internal connection to thermal pad in TSSOP variant - not applicable to SOIC. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed over full input common-mode range (V– – 0.1 V to V+ – 3.5 V), preventing catastrophic output latching in sensor fault conditions. |
| Rail-to-rail output | Swings to within 350 mV of either rail under 2-kΩ load - eliminates need for level-shifting when driving 0–5 V ADC references. |
| Ultra-low 1/f noise | 250 nVPP (0.1–10 Hz) - minimizes baseline wander in ECG, pH meter, and bridge-based transducer applications. |
| JFET input stage | ≤10 pA max input bias current at 25°C - enables use with >1 GΩ source impedances (e.g., piezoelectric sensors, photodiode TIA feedback networks). |
| Industrial temperature range | –40°C to +125°C operation with full parameter specification - qualified for motor control feedback, automotive cabin sensors, and outdoor instrumentation. |
Applications
| Strain Gauge Signal Conditioning | Portable Gas Analyzer Front-End |
|---|---|
Use Scenario: Amplifying low-level mV outputs from Wheatstone bridge strain gauges in structural health monitoring systems. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core with matched quad channels enabling simultaneous bridge excitation and differential sensing. Use Value: 1 μV/°C max offset drift ensures <1 LSB error over 80°C ambient variation in 16-bit systems; rail-to-rail output drives ADC directly without external level shift. |
Use Scenario: Conditioning electrochemical sensor outputs (e.g., CO, NO₂) requiring sub-nA current measurement and low-frequency stability. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) and buffer for low-current, high-impedance gas sensor electrodes. Use Value: ≤10 pA input bias current prevents sensor polarization errors; 250 nVPP 0.1–10 Hz noise preserves resolution in ppm-level concentration detection. |
| Lab Multichannel DAQ System | Industrial DC Power Supply Monitor |
Use Scenario: Simultaneous acquisition of four analog sensor channels (temperature, pressure, humidity, flow) in benchtop test equipment. IC Role / Device Role / Timing Role: Quad-channel signal conditioner providing matched gain, offset, and bandwidth across all inputs. Use Value: Channel separation ≥120 dB at DC eliminates crosstalk between high-gain sensor paths; 11-MHz bandwidth supports anti-alias filtering for 100-kSPS sampling. |
Use Scenario: Real-time voltage and current sensing in programmable DC power supplies for semiconductor test fixtures. IC Role / Device Role / Timing Role: High-precision shunt amplifier and reference buffer for closed-loop regulation feedback paths. Use Value: ±120 μV max input offset ensures <0.01% full-scale error in 10-V output monitors; 20 V/μs slew rate supports fast transient response during load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4182AID | Lower offset (±15 μV typ), lower noise (4.2 nV/√Hz), but higher quiescent current (1.2 mA per amp vs. 1.8 mA typ for OPA4140AID). | Better suited for ultra-high-accuracy 20-bit+ systems where power is secondary to offset/noise. | Select OPA4182AID when offset drift (<0.025 μV/°C) and broadband noise dominate design priorities over supply current. |
| ADA4625-4ARUZ | Higher slew rate (34 V/μs), wider bandwidth (18 MHz), but larger offset (±200 μV max) and no guaranteed 125°C operation. | Preferred for high-speed precision applications (e.g., active filters, fast-settling DAC buffers) outside extended temperature range. | Choose ADA4625-4ARUZ only if 18-MHz bandwidth and 34-V/μs slew are required and industrial temp range is not mandatory. |
Compared with OPA4140AID, OPA4182AID trades higher supply current for significantly lower offset and noise - ideal for metrology-grade systems - while ADA4625-4ARUZ offers superior speed at the cost of DC precision and temperature robustness, making it unsuitable for harsh-environment instrumentation.
Availability
OPA4140AID is available at Aetrix Electronics and suitable for industrial instrumentation, semiconductor test equipment, and portable chemical analyzers requiring stable component supply across long production lifecycles.
Supply support for OPA4140AID 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 amp design and manufacturing.
The OPAx140 family was engineered specifically for high-accuracy, low-drift signal conditioning in demanding industrial and scientific instrumentation - emphasizing JFET input integrity, rail-to-rail output drive, and robust operation across extreme temperatures.
FAQ
What is the maximum operating temperature for OPA4140AID?
The OPA4140AID is fully specified from –40°C to +125°C ambient temperature. All key parameters - including input offset voltage, offset drift, CMRR, and bandwidth - are guaranteed across this full industrial temperature range, making OPA4140AID suitable for engine bay sensors, motor control feedback, and outdoor environmental monitoring systems.
Does OPA4140AID support single-supply operation?
Yes, OPA4140AID supports true single-supply operation from 4.5 V to 36 V. Its input common-mode range extends to V– (including ground), and its rail-to-rail output swings within 350 mV of both supply rails under 2-kΩ load - enabling direct interface with unipolar ADCs and microcontroller analog inputs without level-shifting circuitry.
What is the input bias current specification for OPA4140AID?
The OPA4140AID features a maximum input bias current of ±10 pA at 25°C, with ±3 nA maximum across –40°C to +125°C. This ultra-low bias current stems from its JFET input stage and enables accurate amplification of signals from high-impedance sources such as piezoelectric sensors, pH electrodes, and photodiode transimpedance feedback networks.
Can OPA4140AID drive capacitive loads directly?
OPA4140AID can drive moderate capacitive loads, but stability requires isolation for >100 pF. As shown in Figure 6-19 and Figure 6-20 of the datasheet, adding a 50-Ω series resistor (ROUT) between the output and capacitive load restores phase margin. Direct connection to >200 pF loads risks overshoot or oscillation - always verify stability with actual layout parasitics in final design.
Is OPA4140AID pin-compatible with other quad op amps in SOIC-14?
No, OPA4140AID uses a proprietary pinout optimized for quad-channel symmetry and thermal distribution - it is not pin-compatible with generic SOIC-14 quad op amps like LM324 or TL074. Refer strictly to Figure 5-5 and Table 5-2 in the OPA4140 datasheet for correct pin assignments; miswiring will result in nonfunctional or damaged units.
OPA4140AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 4
- 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 (x4 Channels)
- 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:
- 14-SOIC
OPA4140AID FAQ
1.How can I place an order for OPA4140AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4140AID 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 OPA4140AID reliable?
The price and inventory of OPA4140AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4140AID is usually 5 days.
3.What payment methods are accepted for OPA4140AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4140AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4140AID?
OPA4140AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4140AID 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 OPA4140AID?
For technical support, including OPA4140AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4140AID requirements.
6.How does Aetrix verify that OPA4140AID is sourced from the original manufacturer or authorized distributors?
All OPA4140AID 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 OPA4140AID meets industry standards.
7.What is the process for return or replacement of OPA4140AID?
All OPA4140AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA4140AID, 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 OPA4140AID part is unused and in its original packaging.
Return procedure for OPA4140AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4140AID Tags
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LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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