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Texas Instruments OPA141AIDR
- Part No.:
- OPA141AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA141AIDR.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,414
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Product details
Overview
OPA141AIDR from Texas Instruments is a single-channel, rail-to-rail output, JFET-input operational amplifier optimized for precision low-noise signal conditioning in high-impedance sensor and data acquisition systems. It delivers 10MHz gain bandwidth, 6.5nV/√Hz input voltage noise at 1kHz, ±2.25V to ±18V dual-supply operation, and operates across –40°C to +125°C.
For engineers reviewing the OPA141AIDR datasheet, OPA141AIDR pinout, OPA141AIDR application, or OPA141AIDR equivalent, this page provides verified electrical parameters, thermal behavior under load, noise performance trade-offs vs source impedance, and validated alternatives for battery-powered instrumentation, medical front-ends, and photodiode amplification.
Technical Context
The OPA141AIDR uses a JFET input stage with ultra-low input bias current (≤20pA) and no phase reversal, enabling stable operation when inputs exceed the common-mode range. Its rail-to-rail output swing (within 0.35V of rails at 2kΩ load) and extended input range (down to V–) support single-supply interfacing with modern SAR ADCs and DACs.
Internally compensated for unity-gain stability, it achieves 20V/ms slew rate and 880ns 12-bit settling time while consuming only 1.8mA typical quiescent current - balancing speed, precision, and power efficiency in industrial and portable applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10MHz - supports stable closed-loop operation up to 10MHz at unity gain for anti-aliasing filter design and wideband sensor signal conditioning. |
| Input Voltage Noise Density | 6.5nV/√Hz at 1kHz - enables sub-μV resolution in high-gain, low-frequency measurement paths such as strain gauge or thermocouple amplifiers. |
| Input Bias Current | 20pA max - preserves signal integrity in >100MΩ source impedance circuits like photodiode transimpedance stages without significant offset drift. |
| Common-Mode Input Range | Includes V– (to V– –0.1V) - allows direct connection to ground-referenced sensors in single-supply systems without level-shifting circuitry. |
| Rail-to-Rail Output Swing | Within 0.35V of rails at 2kΩ - maximizes dynamic range into ADCs operating at same supply, reducing need for external reference scaling. |
| Quiescent Current | 1.8mA typical - supports battery life extension in portable instrumentation where continuous analog front-end operation is required. |
| Operating Temperature Range | –40°C to +125°C - qualified for under-hood automotive sensing, industrial PLC I/O modules, and downhole equipment without derating. |
Pinout & Package
OPA141AIDR is packaged in an SO-8 (D) surface-mount package with exposed pad thermal enhancement, measuring 4.90mm × 3.91mm × 1.75mm. The package supports JEDEC-standard reflow and offers 160°C/W junction-to-ambient thermal resistance under natural convection on high-K PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; must be left floating or tied to ground per layout best practices to minimize parasitic coupling. |
| 2 (–IN) | Inverting input | Differential input node with 10¹³Ω || 6pF common-mode impedance; sensitive to PCB leakage and guarding requirements in pA-level applications. |
| 3 (+IN) | Non-inverting input | High-impedance JFET input node; requires symmetrical trace routing and guard ring to maintain CMRR >120dB over temperature. |
| 4 (V–) | Negative supply rail | Reference for internal biasing; must be decoupled with 0.1μF ceramic capacitor placed ≤2mm from pin to suppress supply-induced noise. |
| 5 (OUT) | Amplifier output | Capable of sourcing +36mA/sinking –30mA; requires series resistor (≥50Ω) when driving >100pF capacitive loads to ensure phase margin >45°. |
| 6 (NC) | No internal connection | Unused pin; no internal bond wire; may be used as thermal pad anchor or grounded for mechanical stability. |
| 7 (NC) | No internal connection | Unused pin; electrically isolated; recommended to tie to V– for ESD robustness and thermal conduction. |
| 8 (V+) | Positive supply rail | Accepts 4.5V to 36V single supply or ±2.25V to ±18V dual supplies; requires local 0.1μF + 4.7μF parallel decoupling for broadband noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Prevents output inversion when input exceeds common-mode range - eliminates latch-up risk in non-inverting configurations with overvoltage transients. |
| Very low 1/f noise | 250nVPP (0.1Hz–10Hz) - critical for DC-coupled precision measurements where low-frequency drift dominates total error budget. |
| Low offset drift | ±10μV/°C max - reduces calibration frequency in field-deployed equipment operating across wide ambient temperature swings. |
| Input voltage range includes V– | Enables true single-supply operation with ground-referenced sensors - eliminates need for negative rail generation in portable medical devices. |
| Thermal shutdown protection | Activates at ~180°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained output short-circuit conditions. |
Applications
| Photodiode Amplification | Battery-Powered Instrumentation |
|---|---|
Use Scenario: High-gain transimpedance amplifier for low-light photodiode detection in portable spectrometers or pulse oximeters. IC Role / Device Role / Timing Role: Converts photocurrent to voltage with minimal added noise and bias current error; operates from 3.3V or 5V single supply. Use Value: 20pA max input bias current avoids signal loss in >1GΩ feedback networks; 6.5nV/√Hz noise ensures SNR >85dB at 1kHz for sub-nA photocurrents. | Use Scenario: Analog front-end for handheld multimeters, environmental sensors, or portable oscilloscope probes. IC Role / Device Role / Timing Role: Precision buffer and signal conditioner for high-impedance probe tips and sensor outputs before digitization. Use Value: 1.8mA quiescent current extends battery life beyond 100 hours; rail-to-rail output maximizes ADC utilization without external level-shifting. |
| Medical Instrumentation | Data Acquisition Systems |
Use Scenario: Front-end amplifier for ECG, EEG, or EMG biopotential acquisition with dry electrodes and high electrode-skin impedance. IC Role / Device Role / Timing Role: Low-noise, high-CMRR instrumentation amplifier input stage rejecting 50/60Hz interference while preserving microvolt-level signals. Use Value: 126dB CMRR at DC and 120dB over temperature minimizes mains pickup; JFET input avoids polarization errors seen with bipolar op amps. | Use Scenario: Signal conditioning channel in modular DAQ systems for industrial process monitoring and test equipment. IC Role / Device Role / Timing Role: Programmable-gain amplifier (PGA) driver or anti-aliasing filter stage preceding 16–24-bit sigma-delta ADCs. Use Value: 10MHz bandwidth supports >100kSPS sampling rates; 880ns 12-bit settling ensures accurate conversion without cycle-skipping in multiplexed systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA140AIDBVR | Lower voltage noise (2.2nV/√Hz), SOT-23-5 package, 11MHz GBW, but higher IQ (1.8mA vs 1.8mA typ - similar), limited to ±18V max supply. | Better suited for ultra-low-noise, space-constrained designs where 11MHz bandwidth suffices and thermal dissipation is less critical than board area. | Select OPA140AIDBVR when minimum board footprint and lowest possible voltage noise dominate over output drive capability and thermal robustness. |
| OPA209AIDBVR | 2.2nV/√Hz noise, 18MHz GBW, 1.3mA IQ, rail-to-rail input/output, but bipolar input (0.3nA IB) - not suitable for >10MΩ sources. | Ideal for medium-impedance (<1MΩ) precision applications requiring faster settling and lower noise than OPA141AIDR, such as active filters or DAC buffers. | Choose OPA209AIDBVR only when source impedance is <1MΩ and higher speed justifies trade-off in input bias current and lack of phase-reversal immunity. |
Compared with OPA141AIDR, OPA140AIDBVR offers superior voltage noise in compact packaging but reduced output current drive and thermal margin; OPA209AIDBVR delivers higher speed and lower noise but sacrifices JFET-level input impedance and phase-reversal protection - making OPA141AIDR the optimal choice for high-Z, wide-temp, fault-tolerant precision analog front-ends.
Availability
OPA141AIDR is available at Aetrix Electronics and suitable for battery-powered instruments, industrial controls, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA141AIDR 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 OPA141AIDR belongs to TI's precision JFET-input op amp product line, engineered specifically for high-impedance, low-noise, wide-temperature applications in medical, test & measurement, and industrial sensing systems.
FAQ
What is the maximum supply voltage rating for OPA141AIDR?
The absolute maximum supply voltage for OPA141AIDR is ±20V (dual supply) or 40V (single supply). Operation beyond ±18V (or 36V single) is not recommended for long-term reliability, as key parameters like offset drift and noise are specified only up to ±18V. Exceeding these limits risks permanent damage per TI's Absolute Maximum Ratings table.
Does OPA141AIDR support true rail-to-rail input operation?
OPA141AIDR does not support rail-to-rail input - its common-mode input range extends to V– but only to (V+) – 3.5V at ±18V supply. However, it does provide rail-to-rail output swing within 0.35V of both rails at 2kΩ load, enabling full utilization of ADC input ranges in single-supply configurations.
Can OPA141AIDR drive capacitive loads directly without external compensation?
OPA141AIDR is not stable driving >100pF capacitive loads directly. Figure 19 and Figure 20 in the SBOS510B datasheet show overshoot increases sharply above 100pF. TI recommends adding a 50Ω series resistor (ROUT) between the output and capacitive load to isolate the amplifier and maintain ≥45° phase margin - a mandatory design step for driving ADC inputs or coaxial cables.
How does OPA141AIDR's 0.1Hz–10Hz noise compare to its broadband noise specification?
OPA141AIDR specifies 250nVPP integrated noise over 0.1Hz–10Hz and 42nVRMS over the same band. Its broadband voltage noise density is 6.5nV/√Hz at 1kHz, rising to 12nV/√Hz at 10Hz due to 1/f corner near 10Hz. This makes it especially effective in DC-coupled, low-frequency applications where flicker noise dominates total error, unlike op amps with higher 1/f corners.
Is OPA141AIDR pin-compatible with other members of the OPAx141 family?
Yes - OPA141AIDR (SO-8) shares identical pinout with OPA2141AIDR (dual, SO-8) and OPA2141AIDGKR (dual, MSOP-8), but not with OPA4141 variants (SO-14/TSSOP-14). Pin 1 (NC), 2 (–IN), 3 (+IN), 4 (V–), 5 (OUT), 6 (NC), 7 (NC), and 8 (V+) are functionally and physically identical across all SO-8 versions of the OPAx141 family.
OPA141AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 1 mV
- 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
OPA141AIDR FAQ
1.How can I place an order for OPA141AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA141AIDR 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 OPA141AIDR reliable?
The price and inventory of OPA141AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA141AIDR is usually 5 days.
3.What payment methods are accepted for OPA141AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA141AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA141AIDR?
OPA141AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA141AIDR 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 OPA141AIDR?
For technical support, including OPA141AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA141AIDR requirements.
6.How does Aetrix verify that OPA141AIDR is sourced from the original manufacturer or authorized distributors?
All OPA141AIDR 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 OPA141AIDR meets industry standards.
7.What is the process for return or replacement of OPA141AIDR?
All OPA141AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA141AIDR, 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 OPA141AIDR part is unused and in its original packaging.
Return procedure for OPA141AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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