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Texas Instruments OPA2141AIDR
- Part No.:
- OPA2141AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2141AIDR.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,593
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Product details
Overview
OPA2141AIDR from Texas Instruments is a dual-channel, JFET-input, rail-to-rail output operational amplifier optimized for precision low-noise signal conditioning in single- or dual-supply systems. It delivers 10MHz gain bandwidth, 6.5nV/√Hz input voltage noise at 1kHz, ±2.25V to ±18V supply operation, and 20V/ms slew rate - enabling high-fidelity amplification in battery-powered instrumentation and medical sensor front-ends.
For engineers reviewing the OPA2141AIDR datasheet, OPA2141AIDR pinout, OPA2141AIDR application, or OPA2141AIDR equivalent, key selection criteria include its 20pA max input bias current, –40°C to +125°C industrial temperature rating, 2.3mA max quiescent current per channel, and validated performance with capacitive loads up to 1000pF when isolated by a 50Ω series resistor.
Technical Context
The OPA2141AIDR employs a JFET input stage with ultra-low input bias current (≤20pA) and no phase reversal, allowing stable operation even when input common-mode voltage exceeds V– by 0.1V. Its rail-to-rail output swing (within 0.35V of rails at 2kΩ load) and wide input voltage range (V– –0.1V to V+ –3.5V) support direct interfacing with modern SAR and delta-sigma ADCs operating on 3.3V or 5V supplies.
Internally compensated for unity-gain stability, the device achieves 10MHz bandwidth and 20V/ms slew rate while maintaining low 1/f noise (250nVPP, 0.1Hz–10Hz) and excellent CMRR (126dB typical). Thermal shutdown protection activates at ~180°C junction temperature, with hysteresis ensuring safe re-enablement below 165°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10MHz - supports stable closed-loop gain ≥1 with ≤100ns settling time for 12-bit accuracy. |
| Input Voltage Noise Density | 6.5nV/√Hz at 1kHz - enables sub-μV-level signal amplification without dominating system noise floor. |
| Input Bias Current | 20pA max - preserves signal integrity in high-impedance photodiode, piezoelectric, or pH sensor interfaces. |
| Supply Voltage Range | ±2.25V to ±18V (or +4.5V to +36V single) - accommodates industrial 24V systems and portable 3.3V/5V designs. |
| Quiescent Current | 2.3mA max per channel - allows dual-channel precision amplification in battery-constrained applications. |
| Output Swing | (V–)+0.35V to (V+)–0.35V at 2kΩ - delivers >97% rail utilization for maximum dynamic range into ADCs. |
| Common-Mode Rejection | 126dB typical - rejects power-supply ripple and EMI coupling in noisy industrial environments. |
Pinout & Package
OPA2141AIDR is packaged in an SO-8 (D) surface-mount package with exposed pad thermal enhancement. The 8-pin layout supports dual-amplifier configuration with independent inputs and outputs, and shared power rails.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B | High-impedance node for feedback network connection in Channel B; accepts common-mode down to V– –0.1V. |
| 2 | Non-Inverting Input B | High-Z input for Channel B; enables differential sensing or reference-biased configurations. |
| 3 | Output B | Rail-to-rail output capable of sourcing +36mA/sinking –30mA; requires ROUT ≥50Ω for >100pF capacitive loads. |
| 4 | V– | Negative supply terminal; connects to ground (single-supply) or negative rail (dual-supply); internal ESD clamps present. |
| 5 | V+ | Positive supply terminal; supports up to +36V; decoupling capacitor (0.1μF) required adjacent to pin. |
| 6 | Output A | Rail-to-rail output for Channel A; electrically isolated from Output B; same drive capability and load rules apply. |
| 7 | Non-Inverting Input A | High-Z input for Channel A; identical electrical specs to Pin 2; enables dual-sensor or dual-path signal conditioning. |
| 8 | Inverting Input A | Feedback node for Channel A; matches Pin 1 in bias current, offset, and noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Prevents output inversion during overdrive - critical for noninverting sensor interfaces where input may exceed V–. |
| Low 1/f noise | 250nVPP (0.1Hz–10Hz) - minimizes drift-induced errors in DC-coupled medical instrumentation and weigh scales. |
| Rail-to-rail output | Swings within 350mV of supply rails at 2kΩ - maximizes usable ADC input range without level-shifting circuitry. |
| Thermal shutdown | Activates at ~180°C junction temperature with 15°C hysteresis - protects against sustained short-circuit conditions. |
| JFET input stage | 20pA max input bias current - eliminates leakage-induced offset in high-Z transducer circuits (e.g., pH electrodes). |
Applications
| Portable Data Loggers | Industrial Process Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental sensors measuring temperature, humidity, and gas concentration over multi-year deployments. IC Role / Device Role / Timing Role: Dual-channel signal conditioner for analog sensor outputs prior to 16-bit SAR ADC sampling. Use Value: 2.3mA max per channel quiescent current extends battery life; rail-to-rail output ensures full ADC code utilization across varying supply voltage. |
Use Scenario: 4–20mA loop-powered field instruments converting RTD or thermocouple signals in chemical plants and refineries. IC Role / Device Role / Timing Role: Precision front-end amplifier with programmable gain and filtering before current-loop DAC interface. Use Value: 126dB CMRR rejects common-mode noise from motor drives and RF sources; –40°C to +125°C rating ensures reliability in uncontrolled enclosures. |
| Medical Patient Monitors | Photodiode Signal Conditioning |
|
Use Scenario: ECG/EEG front-ends requiring ultra-low noise, high input impedance, and DC-coupled baseline stability. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with selectable gain and active filtering. Use Value: 6.5nV/√Hz noise density and 250nVPP 0.1–10Hz noise preserve microvolt-level biopotential signals; no phase reversal prevents artifact generation during lead-off events. |
Use Scenario: Optical smoke detectors and spectrophotometers using reverse-biased photodiodes generating picoamp-level currents. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) converting photodiode current to voltage with minimal input bias error. Use Value: 20pA max input bias current prevents significant offset error in high-gain TIA configurations; JFET input avoids diode leakage path degradation. |
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 |
|---|---|---|---|
| OPA2140AIDR | Lower input voltage noise (2.2nV/√Hz), higher supply current (1.8mA typ), narrower supply range (±18V max) | Better for ultra-low-noise audio or metrology; less suitable for 24V industrial systems | Select OPA2140AIDR when voltage noise dominates system budget and supply is ≤±18V |
| OPA2209AIDR | Higher input bias current (1.5pA typ), lower quiescent current (1.1mA/ch), wider GBW (18MHz) | Optimized for low-power, high-speed data acquisition; not ideal for femtoamp-level photodiode apps | Choose OPA2209AIDR for battery-powered DAQ with >10MHz signal content and moderate source impedance |
Compared with OPA2141AIDR, OPA2140AIDR offers superior voltage noise but sacrifices supply voltage headroom and increases quiescent current, while OPA2209AIDR trades input bias current for speed and power efficiency - making OPA2141AIDR the balanced choice for industrial and medical applications demanding low noise, low bias, and wide supply flexibility.
Availability
OPA2141AIDR is available at Aetrix Electronics and suitable for battery-powered instruments, industrial controls, medical instrumentation, and photodiode amplifiers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2141AIDR 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 amps and signal chain solutions.
The OPAx141 family was designed for high-accuracy, low-power signal conditioning in harsh environments - targeting applications where JFET input characteristics, rail-to-rail output, and robust thermal behavior are essential.
FAQ
What is the maximum capacitive load the OPA2141AIDR can drive without oscillation?
The OPA2141AIDR remains stable with capacitive loads up to 1000pF when a 50Ω isolation resistor is placed in series with the output (ROUT). Without this resistor, instability may occur above ~100pF. Figure 19 and Figure 20 in the SBOS510B datasheet validate this behavior across multiple gain configurations and ROUT values for the OPA2141AIDR.
Does the OPA2141AIDR support true single-supply operation down to 3.3V?
No - the OPA2141AIDR requires a minimum total supply voltage of +4.5V (or ±2.25V). At 3.3V, the common-mode input range does not include midsupply, and key specifications are not guaranteed. For 3.3V systems, consider the OPA2376 or OPA2182, but the OPA2141AIDR is rated only from +4.5V to +36V.
How does the OPA2141AIDR handle input overvoltage beyond the specified common-mode range?
The OPA2141AIDR features internal phase-reversal protection: when input voltage exceeds V– –0.1V or V+ –3.5V, the output limits to the appropriate rail instead of inverting. This behavior is confirmed in Figure 21 of the SBOS510B datasheet and prevents erroneous readings in sensor fault conditions for the OPA2141AIDR.
What is the thermal resistance (θJA) of the OPA2141AIDR in SO-8 package?
The OPA2141AIDR in SO-8 (D) package has a junction-to-ambient thermal resistance (θJA) of 160°C/W under JEDEC-standard high-K board conditions. This value assumes natural convection and defines the temperature rise per watt of dissipated power - critical for calculating maximum ambient temperature in sealed enclosures for the OPA2141AIDR.
Can the OPA2141AIDR be used in a photodiode transimpedance amplifier (TIA) configuration?
Yes - the OPA2141AIDR is well-suited for TIA applications due to its 20pA max input bias current, low input capacitance, and low 1/f noise. Its JFET input avoids leakage paths that degrade photodiode response, and its 10MHz bandwidth supports fast optical pulse detection. Layout best practices (guard ring, low-capacitance PCB) are essential for optimal OPA2141AIDR TIA performance.
OPA2141AIDR 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:
- 2
- 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 (x2 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:
- 8-SOIC
OPA2141AIDR FAQ
1.How can I place an order for OPA2141AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2141AIDR 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 OPA2141AIDR reliable?
The price and inventory of OPA2141AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2141AIDR is usually 5 days.
3.What payment methods are accepted for OPA2141AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2141AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2141AIDR?
OPA2141AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2141AIDR 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 OPA2141AIDR?
For technical support, including OPA2141AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2141AIDR requirements.
6.How does Aetrix verify that OPA2141AIDR is sourced from the original manufacturer or authorized distributors?
All OPA2141AIDR 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 OPA2141AIDR meets industry standards.
7.What is the process for return or replacement of OPA2141AIDR?
All OPA2141AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2141AIDR, 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 OPA2141AIDR part is unused and in its original packaging.
Return procedure for OPA2141AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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