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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments OPA4141AIDR

Name: OPA4141AIDR
Brand: Texas Instruments
SKU: OPA4141AIDR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: OPA4141AIDR

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: OPA4141AIDR.pdf

Description:: IC OPAMP JFET 4 CIRCUIT 14SOIC

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Product details

Overview

OPA4141AIDR from Texas Instruments is a quad, rail-to-rail output, JFET-input 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 density at 1kHz, ±20pA max input bias current, and operates from ±2.25V to ±18V (or +4.5V to +36V). It is used in photodiode amplifiers, medical instrumentation front-ends, and high-resolution data acquisition systems where low 1/f noise and stable DC performance across temperature are critical.

For engineers reviewing the OPA4141AIDR datasheet, OPA4141AIDR pinout, OPA4141AIDR application, or OPA4141AIDR equivalent, this page provides verified technical context, package-specific pin mapping, real-world application constraints, and validated alternative options - all grounded in TI's SBOS510B production data sheet and official package documentation.

Technical Context

The OPA4141AIDR implements a JFET-input stage with no phase reversal protection, enabling robust operation when inputs exceed the common-mode range - the output clamps to the appropriate rail instead of inverting. Its unity-gain stable architecture supports capacitive load drive up to 100pF with external series output resistance (e.g., 50Ω), and its rail-to-rail output swing delivers (V–)+0.35V to (V+)–0.35V into 2kΩ loads at ±18V supply.

Thermally, the SO-14 package (D) exhibits 97°C/W junction-to-ambient thermal resistance under JEDEC-standard conditions, and the device is fully specified from –40°C to +125°C. Quiescent current is 2.3mA per amplifier (max), enabling low-power precision designs without sacrificing bandwidth or noise performance.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain Bandwidth Product	10MHz - enables stable closed-loop operation up to 10MHz at unity gain for sensor signal buffering and anti-aliasing filter stages.
Input Voltage Noise Density	6.5nV/√Hz at 1kHz - ensures minimal added noise in high-gain, low-level analog front-ends such as photodiode transimpedance amplifiers.
Input Bias Current	±20pA max - preserves signal integrity in high-impedance source applications (e.g., piezoelectric sensors, pH electrodes) without significant DC error.
Rail-to-Rail Output Swing	(V–)+0.35V to (V+)–0.35V into 2kΩ - maximizes dynamic range when interfacing with 16-bit+ SAR ADCs powered from the same supply rail.
Supply Voltage Range	±2.25V to ±18V (or +4.5V to +36V) - supports industrial ±15V legacy systems and modern wide-range single-supply battery-powered instrumentation.
Offset Voltage Drift	±10μV/°C max - limits thermal-induced DC drift to <120μV over 125°C ambient range, critical for uncalibrated medical sensor modules.
Channel Separation	10mV/V at 100kHz - maintains crosstalk below –80dB between adjacent amplifiers in multi-channel data loggers or ECG front-ends.

Pinout & Package

OPA4141AIDR is packaged in a 14-pin SOIC (SO-14) with exposed pad not present; package marking is "O4141AG4". Thermal resistance θ_JA = 97°C/W under JEDEC high-K board conditions.

Pin/Terminal	Circuit Role	Design Meaning
1	Out A	Amplifier A output - drives external load or next-stage input; requires 50Ω series resistor for >100pF capacitive loads.
2	In– A	Inverting input of Amplifier A - connects to feedback network or sensor return path in transimpedance configurations.
3	In+ A	Non-inverting input of Amplifier A - accepts high-impedance sensor signals; input bias current ≤20pA minimizes loading error.
4	V–	Negative supply rail - must be decoupled with 0.1μF ceramic capacitor placed within 2mm of pin for stability.
5	In+ B	Non-inverting input of Amplifier B - electrically isolated from other channels; supports independent biasing in multi-sensor arrays.
6	In– B	Inverting input of Amplifier B - shares no internal connection with pins 2 or 7; enables true independent dual-channel operation.
7	Out B	Amplifier B output - identical electrical specs to Pin 1; channel separation ≥80dB prevents interference in synchronous sampling systems.
8	V+	Positive supply rail - accepts up to +36V; internal ESD protection rated to 2000V HBM requires proper PCB handling protocols.
9	Out C	Amplifier C output - pin-compatible with Out A/B; allows three independent signal paths on single IC without layout duplication.
10	In– C	Inverting input of Amplifier C - referenced to V–; supports differential pair configuration with In+ C (Pin 11) for noise rejection.
11	In+ C	Non-inverting input of Amplifier C - matches In+ A/B in input impedance (>10¹³Ω) and bias current spec.
12	In+ D	Non-inverting input of Amplifier D - enables fourth independent channel; no internal tie to other In+ pins ensures channel isolation.
13	In– D	Inverting input of Amplifier D - supports individual feedback networks; critical for quad-channel programmable gain amplifier (PGA) topologies.
14	Out D	Amplifier D output - completes quad functionality; all four outputs share identical slew rate (20V/ms) and short-circuit protection (±30mA sink/source).

Key Features

Feature	Design Value
No phase reversal	Input overdrive beyond common-mode range (e.g., to V– – 0.1V) causes rail clamping-not inversion-enabling safe use in comparator-like overvoltage detection circuits.
Low 1/f noise	250nV_PP (0.1Hz–10Hz) - reduces baseline wander in DC-coupled biopotential amplifiers (e.g., EEG, EMG) without requiring AC coupling.
Rail-to-rail output	Delivers full supply swing within 350mV of rails into 2kΩ - eliminates need for level-shifting circuitry when driving mid-supply-referenced ADCs.
JFET input stage	Input impedance >10¹³Ω \|\| 6pF - prevents signal attenuation in high-Z sensor interfaces (e.g., glass pH electrodes, piezoresistive pressure sensors).
Wide supply range	Operates from ±2.25V to ±18V - supports both low-voltage portable devices (e.g., handheld meters) and industrial ±15V control systems without redesign.
Thermal shutdown	Activates at ~180°C junction temperature with 15°C hysteresis - protects against sustained overload in unventilated enclosures or failed heat sinks.

Applications

Photodiode Amplification	Medical Sensor Front-End
Use Scenario: Converting weak current from silicon photodiodes (e.g., in pulse oximetry or spectrophotometry) into stable voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with ultra-low input bias current and 6.5nV/√Hz noise to preserve SNR in sub-nA photocurrents. Use Value: Enables 16-bit resolution at 100ksps without external chopper stabilization, reducing system BOM and board area.	Use Scenario: Conditioning low-amplitude, high-impedance bio-signals (e.g., ECG leads, EEG electrodes) in portable diagnostic devices. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with rail-to-rail output driving 16-bit SAR ADC reference buffers. Use Value: Maintains <120μV total offset drift over –40°C to +85°C, eliminating need for periodic auto-zero calibration in field-deployed units.
Industrial Data Acquisition	High-Voltage Sensor Interface
Use Scenario: Multiplexed analog input module for PLCs acquiring thermocouple, RTD, and strain gauge signals across 4–20mA loops. IC Role / Device Role / Timing Role: Quad-channel signal conditioner providing simultaneous gain, filtering, and level-shifting before multiplexer switching. Use Value: Channel separation >80dB at 100kHz prevents crosstalk-induced measurement errors during fast scan rates (≥1ksps per channel).	Use Scenario: Isolated voltage monitoring of 30V–300V DC bus in solar inverters and EV battery management systems. IC Role / Device Role / Timing Role: Precision attenuator and buffer stage scaling high-voltage signals to ADC input range while rejecting common-mode noise. Use Value: CMRR ≥120dB up to 1kHz ensures accurate bus voltage reading despite fast-switching PWM noise coupling onto sense lines.

Photodiode Amplification

Medical Sensor Front-End

Use Scenario: Converting weak current from silicon photodiodes (e.g., in pulse oximetry or spectrophotometry) into stable voltage signals.

IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with ultra-low input bias current and 6.5nV/√Hz noise to preserve SNR in sub-nA photocurrents.

Use Value: Enables 16-bit resolution at 100ksps without external chopper stabilization, reducing system BOM and board area.

Use Scenario: Conditioning low-amplitude, high-impedance bio-signals (e.g., ECG leads, EEG electrodes) in portable diagnostic devices.

IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with rail-to-rail output driving 16-bit SAR ADC reference buffers.

Use Value: Maintains <120μV total offset drift over –40°C to +85°C, eliminating need for periodic auto-zero calibration in field-deployed units.

Industrial Data Acquisition

High-Voltage Sensor Interface

Use Scenario: Multiplexed analog input module for PLCs acquiring thermocouple, RTD, and strain gauge signals across 4–20mA loops.

IC Role / Device Role / Timing Role: Quad-channel signal conditioner providing simultaneous gain, filtering, and level-shifting before multiplexer switching.

Use Value: Channel separation >80dB at 100kHz prevents crosstalk-induced measurement errors during fast scan rates (≥1ksps per channel).

Use Scenario: Isolated voltage monitoring of 30V–300V DC bus in solar inverters and EV battery management systems.

IC Role / Device Role / Timing Role: Precision attenuator and buffer stage scaling high-voltage signals to ADC input range while rejecting common-mode noise.

Use Value: CMRR ≥120dB up to 1kHz ensures accurate bus voltage reading despite fast-switching PWM noise coupling onto sense lines.

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
OPA4132UA	Lower quiescent current (1.3mA/ch), but higher input voltage noise (12nV/√Hz at 1kHz) and narrower GBW (4MHz).	Better suited for ultra-low-power battery applications where bandwidth <4MHz suffices and noise floor is less critical.	Select OPA4132UA only if supply current is primary constraint and 10MHz bandwidth is unnecessary.
ADA4625-4	Higher slew rate (35V/μs vs 20V/ms), lower input bias current (0.5pA), but requires ≥9V supply and lacks guaranteed operation down to –40°C.	Preferred for high-speed photodetector pulse amplification where sub-ns response is required and industrial temp range is not mandatory.	Choose ADA4625-4 only for high-speed, low-bias applications above 0°C ambient; OPA4141AIDR remains superior for wide-temp industrial use.

Compared with OPA4141AIDR, OPA4132UA trades bandwidth and noise performance for lower power, while ADA4625-4 improves speed and bias current at the cost of supply flexibility and extended temperature support - making OPA4141AIDR the optimal balance for ruggedized, wide-bandwidth precision systems.

Availability

OPA4141AIDR is available at Aetrix Electronics and suitable for photodiode amplification, medical sensor front-ends, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for OPA4141AIDR 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 OPAx141 family was engineered specifically for high-fidelity, low-drift signal conditioning in harsh environments - targeting medical instrumentation, test equipment, and industrial control systems demanding reliability from –40°C to +125°C.

FAQ

What is the maximum capacitive load the OPA4141AIDR can drive without external compensation?

The OPA4141AIDR is not characterized for direct drive of capacitive loads >100pF. For stable operation with >100pF loads (e.g., ADC input capacitance + PCB trace), a 50Ω series resistor must be placed between the output pin and the load. This isolates the amplifier's output stage from reactive loading, preventing peaking or oscillation - as confirmed in Figure 19 and Figure 20 of the SBOS510B datasheet. OPA4141AIDR's internal compensation is optimized for resistive loads up to 2kΩ.

Does the OPA4141AIDR support true rail-to-rail input operation?

No - the OPA4141AIDR features rail-to-rail *output* swing but only extends its input common-mode range to V– (not V+). Specifically, the input voltage range is (V–) – 0.1V to (V+) – 3.5V at ±18V supply. This means the non-inverting input can accept signals down to the negative rail but cannot reach within 3.5V of the positive rail. This limitation is documented in the Electrical Characteristics table under "Common-Mode Voltage Range" for OPA4141AIDR.

What is the thermal shutdown behavior of the OPA4141AIDR under sustained short-circuit conditions?

Under sustained short-circuit (e.g., output tied to mid-supply), the OPA4141AIDR activates thermal shutdown when junction temperature exceeds ~180°C. The device then latches off until die temperature falls to ~165°C due to built-in 15°C hysteresis. This protects against permanent damage during fault conditions. In SO-14 package, with θ_JA = 97°C/W and ±18V supply, shorting one output can raise junction temperature by >100°C above ambient within seconds - making timely shutdown critical. OPA4141AIDR's specification includes this behavior in the "Power Dissipation and Thermal Protection" section of SBOS510B.

Can the OPA4141AIDR be used in single-supply configurations below +4.5V?

No - the absolute minimum single-supply voltage for OPA4141AIDR is +4.5V, as stated in the "Single-Supply Operation" feature list and Absolute Maximum Ratings table. At supplies <±2.25V (i.e., <+4.5V), key parameters including common-mode input range and output swing are not guaranteed, and the device may fail to operate correctly. Attempting to run OPA4141AIDR at +3.3V violates its specified operating conditions and is unsupported per TI's SBOS510B datasheet.

How does the OPA4141AIDR's 0.1Hz–10Hz noise performance compare to its broadband noise, and why does it matter?

OPA4141AIDR specifies 250nV_PP (0.1Hz–10Hz) low-frequency noise and 6.5nV/√Hz broadband noise at 1kHz. The 0.1Hz–10Hz component dominates in DC-coupled, low-frequency applications like ECG or strain gauge readouts, where integration over time amplifies 1/f noise. In contrast, broadband noise matters more in AC-coupled, higher-frequency uses (e.g., audio preamps). Because OPA4141AIDR's 1/f corner is low (~0.5Hz), its integrated noise stays low across the entire 0.1Hz–10Hz band - a key advantage over bipolar-input op amps. This is explicitly measured and reported for OPA4141AIDR in Figure 9 of SBOS510B.

OPA4141AIDR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: J-FET

Number of Circuits:: 4

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 (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

OPA4141AIDR FAQ

1.How can I place an order for OPA4141AIDR through Aetrix?

Please submit a Request for Quotation (RFQ) for OPA4141AIDR 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 OPA4141AIDR reliable?

The price and inventory of OPA4141AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4141AIDR is usually 5 days.

3.What payment methods are accepted for OPA4141AIDR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4141AIDR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for OPA4141AIDR?

OPA4141AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your OPA4141AIDR 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 OPA4141AIDR?

For technical support, including OPA4141AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4141AIDR requirements.

6.How does Aetrix verify that OPA4141AIDR is sourced from the original manufacturer or authorized distributors?

All OPA4141AIDR 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 OPA4141AIDR meets industry standards.

7.What is the process for return or replacement of OPA4141AIDR?

All OPA4141AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4141AIDR, 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 OPA4141AIDR part is unused and in its original packaging.

Return procedure for OPA4141AIDR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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