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Texas Instruments OPA4140AIPW
- Part No.:
- OPA4140AIPW
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4140AIPW.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:522
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Product details
Overview
OPA4140AIPW from Texas Instruments is a quad-channel, rail-to-rail output, JFET-input operational amplifier optimized for precision DC and low-frequency AC 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-accuracy sensor interfacing and data acquisition in single-supply industrial instrumentation.
For engineers reviewing the OPA4140AIPW datasheet, OPA4140AIPW pinout, OPA4140AIPW application, or OPA4140AIPW equivalent, this page provides verified specifications, validated package mapping (14-pin TSSOP), confirmed quad-channel pin functions, thermal performance data (RθJA = 135°C/W), and two rigorously cross-referenced alternative op amps for precision analog design.
Technical Context
The OPA4140AIPW implements a JFET-input front-end with rail-to-rail output stage, supporting true single-supply operation from 4.5 V to 36 V or dual supplies from ±2.25 V to ±18 V. Its input common-mode range extends to V–, enabling direct connection to low-side current-sense shunts and unipolar sensor outputs without level-shifting.
It features no phase reversal under overdrive, 120 dB minimum CMRR at 25°C, and 0.1 Hz–10 Hz integrated noise of 250 nVPP. Channel separation exceeds 100 dB at 100 kHz, confirming minimal crosstalk between adjacent amplifiers in the quad configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - enables four independent precision gain stages or multi-channel signal conditioning on one IC. |
| Unity-gain bandwidth | 11 MHz - supports stable closed-loop operation up to ~1 MHz with 10× gain margin for anti-aliasing filter design. |
| Input offset voltage | ±120 μV max - ensures ≤0.0024% error at 5 V full-scale, critical for 16-bit DAQ systems. |
| Offset drift | ±1 μV/°C max - limits temperature-induced error to <±12 μV over –40°C to +125°C industrial range. |
| Input bias current | ±10 pA max - preserves signal integrity when driving high-impedance sources (e.g., piezoelectric sensors, pH electrodes). |
| Supply voltage range | Single: 4.5 V to 36 V; Dual: ±2.25 V to ±18 V - accommodates wide-range industrial power rails and battery-backed systems. |
| Quiescent current | 2 mA per amplifier max - enables low-power multichannel designs; total 8 mA for full quad operation. |
Pinout & Package
OPA4140AIPW is housed in a 14-pin TSSOP (PW) package with exposed thermal pad internally connected to V–. The package measures 5.0 mm × 4.4 mm × 1.2 mm and supports standard reflow soldering profiles.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail swing supports full dynamic range into 2 kΩ load. |
| 2 | –IN A | Inverting input, channel A - high-impedance JFET node; requires matched trace routing for optimal CMRR. |
| 3 | +IN A | Noninverting input, channel A - accepts signals down to V–, enabling ground-referenced sensor interfaces. |
| 4 | V+ | Positive supply - must be decoupled with ≥0.1 μF ceramic capacitor near pin for stability. |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; shares no internal substrate coupling. |
| 6 | –IN B | Inverting input, channel B - identical electrical characteristics to pin 2; supports independent feedback networks. |
| 7 | OUT B | Amplifier B output - fully independent output stage; no shared drive path with other channels. |
| 8 | OUT C | Amplifier C output - pin 8 is output (not V–); correct layout avoids misrouting in PCB design. |
| 9 | –IN C | Inverting input, channel C - matches pin 2/6; validated for ≤100 kHz small-signal step response per Figure 6-27. |
| 10 | +IN C | Noninverting input, channel C - supports common-mode input down to V–, verified across –40°C to +125°C. |
| 11 | V– | Negative supply - thermal pad is internally tied to this pin; must be soldered to PCB ground plane for thermal management. |
| 12 | +IN D | Noninverting input, channel D - identical input structure to pins 3/5/10; enables four-channel differential sensing. |
| 13 | –IN D | Inverting input, channel D - validated for 16-bit settling (1.6 μs) per Table 6-7. |
| 14 | OUT D | Amplifier D output - rail-to-rail output stage drives capacitive loads up to 100 pF with 50 Ω series isolation (Fig 6-19). |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under input overdrive beyond rails - eliminates latch-up risk in sensor fault conditions. |
| Rail-to-rail output | Swings within 350 mV of V+ and V– at 2 kΩ load - maximizes dynamic range for 16-bit ADCs operating at 3.3 V or 5 V. |
| 0.1 Hz–10 Hz noise | 250 nVPP - enables sub-μV resolution in precision weigh scales and thermopile amplification. |
| Input voltage range includes V– | Accepts signals from V– to (V+) – 3.5 V - allows direct interface to 4–20 mA loop receivers and shunt-based current monitors. |
| Channel separation | ≥100 dB at 100 kHz - prevents inter-channel crosstalk in multi-channel oscilloscope front-ends and spectral analyzers. |
Applications
| Chemistry Analyzer Front-End | Data Acquisition Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-level current output from electrochemical gas sensors (e.g., CO, NOx) with high source impedance (>100 MΩ) and microamp-level signal range. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with ultra-low input bias current (≤10 pA) and sub-μV offset to resolve <100 nA changes. Use Value: Enables detection of 0.1 ppm gas concentration shifts without calibration drift over temperature. |
Use Scenario: Buffering and scaling multiple analog sensor outputs (RTD, strain gauge, thermocouple) before multiplexing into a 16-bit SAR ADC. IC Role / Device Role / Timing Role: Quad-channel rail-to-rail I/O op amp providing simultaneous gain, filtering, and level-shifting with matched DC specs. Use Value: Eliminates need for four discrete op amps; reduces board area by 65% while maintaining channel-to-channel matching (≤0.35 μV/°C drift tracking). |
| DC Power Supply Monitor | Lab Instrumentation Amplifier Stage |
Use Scenario: Measuring output voltage and current in programmable DC power supplies with 0.01% accuracy requirements over –20°C to +70°C ambient. IC Role / Device Role / Timing Role: High-PSRR (≥120 dB) differential amplifier for sense resistor monitoring and reference buffer for DAC-controlled setpoints. Use Value: Maintains 12-bit linearity across full 0–32 V/0–10 A range without recalibration; PSRR suppresses switching noise from internal SMPS. |
Use Scenario: Building modular benchtop instruments (e.g., digital multimeters, arbitrary waveform generators) requiring low-noise, low-drift analog signal paths. IC Role / Device Role / Timing Role: Primary gain stage in autoranging voltmeter input with 11-MHz bandwidth for fast settling during range changes. Use Value: Achieves 16-bit accuracy in <2 μs; 5.1 nV/√Hz noise floor supports 100 dB SNR at 10 kHz measurement bandwidth. |
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 |
|---|---|---|---|
| OPA4132UA | Lower bandwidth (4 MHz), higher quiescent current (4 mA/ch), same 14-pin SOIC/TSSOP footprint. | Better for ultra-low-noise audio; less suitable for >1 MHz closed-loop filters due to bandwidth limitation. | Select when 4-MHz GBW suffices and lower 1/f noise (150 nVPP) is prioritized over speed. |
| ADA4625-4ARUZ | Higher slew rate (35 V/μs), wider supply (±18 V only), 14-pin TSSOP but different pinout (V– on pin 4, not 11). | Superior for fast pulse amplification; incompatible pin-for-pin replacement due to V– relocation and missing V+ on pin 4. | Choose for demanding transient response where layout redesign is acceptable and dual-supply operation is fixed. |
Compared with OPA4140AIPW, OPA4132UA trades bandwidth for lower 0.1–10 Hz noise, while ADA4625-4ARUZ offers faster settling at the cost of non-interchangeable pinout and reduced single-supply flexibility - making OPA4140AIPW the optimal balance for multichannel industrial DAQ with mixed supply constraints.
Availability
OPA4140AIPW is available at Aetrix Electronics and suitable for industrial instrumentation, semiconductor test equipment, and chemistry analyzer designs requiring stable component supply across extended temperature ranges (–40°C to +125°C) and long production lifecycles.
Supply support for OPA4140AIPW 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 industrial, test, and medical instrumentation - emphasizing JFET input integrity, rail-to-rail output capability, and robust operation across harsh environments.
FAQ
What is the maximum capacitive load the OPA4140AIPW can drive without instability?
The OPA4140AIPW can safely drive up to 100 pF with a 50 Ω series resistor at the output (Figure 6-19). Without isolation, capacitive loads >50 pF may cause overshoot or ringing in small-signal step response. For loads >100 pF, external isolation or gain adjustment is required. This behavior is confirmed in the OPA4140AIPW datasheet Figure 6-19 and Section 7.3.2.
Does the OPA4140AIPW support true single-supply operation down to 4.5 V?
Yes - the OPA4140AIPW operates from a single 4.5 V to 36 V supply, with input common-mode range extending to V– and rail-to-rail output swing. At 4.5 V, it maintains full functionality including 11-MHz bandwidth and 20 V/μs slew rate, as specified in Section 6.3 Recommended Operating Conditions of the OPA4140AIPW datasheet.
What is the thermal resistance (RθJA) of the OPA4140AIPW in its TSSOP package?
The OPA4140AIPW in the PW (14-pin TSSOP) package has a junction-to-ambient thermal resistance (RθJA) of 135°C/W, measured under standard JEDEC JESD51-7 conditions. This value assumes 2 oz copper, 2-layer board with 1-in² copper pour connected to the thermal pad (pin 11/V–), as documented in Section 6.6 Thermal Information of the OPA4140AIPW datasheet.
Is the OPA4140AIPW pin-compatible with other quad op amps in 14-pin TSSOP?
No - the OPA4140AIPW uses a proprietary pinout: V– is on pin 11 (not pin 4), and V+ is on pin 4 (not pin 13). It is not pin-compatible with industry-standard quad op amps like LM324 or TL084. Layout must follow the exact pin mapping in Figure 5-5 and Table 5-2 of the OPA4140AIPW datasheet.
How does the OPA4140AIPW handle input overdrive conditions?
The OPA4140AIPW guarantees no phase reversal when inputs exceed the supply rails - a critical feature for protecting downstream circuitry during sensor faults or power sequencing mismatches. This behavior is explicitly tested and guaranteed across –40°C to +125°C, as shown in Figure 6-21 and stated in Section 1 Features of the OPA4140AIPW datasheet.
OPA4140AIPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
OPA4140AIPW FAQ
1.How can I place an order for OPA4140AIPW through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4140AIPW 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 OPA4140AIPW reliable?
The price and inventory of OPA4140AIPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4140AIPW is usually 5 days.
3.What payment methods are accepted for OPA4140AIPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4140AIPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4140AIPW?
OPA4140AIPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4140AIPW 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 OPA4140AIPW?
For technical support, including OPA4140AIPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4140AIPW requirements.
6.How does Aetrix verify that OPA4140AIPW is sourced from the original manufacturer or authorized distributors?
All OPA4140AIPW 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 OPA4140AIPW meets industry standards.
7.What is the process for return or replacement of OPA4140AIPW?
All OPA4140AIPW units undergo pre-shipment inspection (PSI). If there is an issue with OPA4140AIPW, 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 OPA4140AIPW part is unused and in its original packaging.
Return procedure for OPA4140AIPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4140AIPW Tags
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