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Texas Instruments OPA4141AIPWR
- Part No.:
- OPA4141AIPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4141AIPWR.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,297
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Product details
Overview
OPA4141AIPWR 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 drift and wide input voltage range including V– are critical.
For engineers reviewing the OPA4141AIPWR datasheet, OPA4141AIPWR pinout, OPA4141AIPWR application, or OPA4141AIPWR equivalent, key selection criteria include its 250nVPP 0.1Hz–10Hz integrated noise, 10mV/°C max offset drift over –40°C to +125°C, no phase reversal behavior under overdrive, and compatibility with 14-pin SOIC and TSSOP packages for space-constrained industrial designs.
Technical Context
The OPA4141AIPWR integrates four independent JFET-input amplifier channels in a single monolithic die, each featuring unity-gain stability, input voltage range extending to V–, and rail-to-rail output swing within 350mV of supply rails at 2kΩ load. Its architecture avoids bipolar input stages to maintain ultra-low input bias current and 1/f noise performance.
It supports true single-supply operation down to +4.5V while retaining full specification across –40°C to +125°C, with CMRR ≥120dB and PSRR ≥120dB over frequency. The device includes internal phase-reversal protection and thermal shutdown triggered at ~180°C junction temperature, enabling robust operation in battery-powered and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10MHz - enables stable closed-loop operation up to 10MHz at unity gain for anti-aliasing filter design and fast sensor signal conditioning. |
| Input Voltage Noise Density | 6.5nV/√Hz at 1kHz - ensures minimal contribution to total system noise in high-gain, low-frequency measurement paths. |
| Input Bias Current | ±20pA max - preserves signal integrity in high-impedance sources such as photodiodes and piezoelectric sensors. |
| Offset Voltage Drift | ±10mV/°C max - guarantees predictable DC accuracy over wide ambient temperature swings in unregulated enclosures. |
| Rail-to-Rail Output Swing | (V–)+0.35V to (V+)–0.35V at 2kΩ - maximizes dynamic range when interfacing to 16-bit+ SAR ADCs powered from same supply rail. |
| Supply Voltage Range | ±2.25V to ±18V (or +4.5V to +36V) - supports flexible power architecture including split-rail lab equipment and wide-input industrial power supplies. |
| Quiescent Current per Channel | 2.3mA max - allows four-channel precision amplification within <10mA total supply budget for portable instrumentation. |
Pinout & Package
The OPA4141AIPWR is packaged in a 14-pin TSSOP (PW) with exposed pad, offering compact footprint and improved thermal performance (θJA = 135°C/W) versus SO-14. Pin numbering follows standard JEDEC top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load or feedback network; rail-to-rail capable with 36mA source / 30mA sink capability. |
| 2 | In– A | Inverting input of channel A - high-impedance JFET node; requires matched trace routing to minimize common-mode error. |
| 3 | In+ A | Non-inverting input of channel A - referenced to V– for single-supply operation; accepts signals down to V– –0.1V. |
| 4 | V+ | Positive supply rail - connects to main positive supply; decoupling capacitor (0.1µF) required adjacent to pin. |
| 5 | In+ B | Non-inverting input of channel B - electrically isolated from other channels; enables independent sensor conditioning paths. |
| 6 | In– B | Inverting input of channel B - shares no internal connection with other inputs; supports differential input configurations per channel. |
| 7 | Out B | Amplifier B output - independently buffered; no crosstalk with Out A/C/D (channel separation >100dB at dc). |
| 8 | V– | Negative supply rail - serves as reference for all four amplifiers; must be connected even in single-supply mode. |
| 9 | Out C | Amplifier C output - identical electrical specs to Out A/B; enables multi-channel analog front-end without board area penalty. |
| 10 | In– C | Inverting input of channel C - supports active filtering or transimpedance configurations with photodiode anodes tied to V–. |
| 11 | In+ C | Non-inverting input of channel C - usable as reference buffer input or high-impedance voltage monitor point. |
| 12 | In+ D | Non-inverting input of channel D - fully independent; allows simultaneous monitoring of four separate sensor outputs. |
| 13 | In– D | Inverting input of channel D - compatible with programmable gain stage configurations using external resistor networks. |
| 14 | Out D | Amplifier D output - completes quad functionality; supports redundancy schemes or multi-stage signal processing chains. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Prevents output inversion during input overdrive beyond common-mode range - eliminates latch-up risk in noninverting sensor interfaces. |
| 0.1Hz–10Hz integrated noise | 250nVPP - directly supports sub-16-bit resolution in slow-sampling applications like strain gauge bridges without external filtering. |
| Input voltage range includes V– | Accepts signals down to V– –0.1V - enables ground-referenced signal acquisition in single-supply systems without level-shifting circuitry. |
| Thermal shutdown protection | Activates at ~180°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained output short-circuit events. |
| Wide temperature specification | Full electrical performance guaranteed from –40°C to +125°C - suitable for under-hood automotive modules and industrial PLC I/O cards. |
Applications
| Photodiode Amplification | Medical ECG Front-End |
|---|---|
|
Use Scenario: Converting weak, high-impedance current from silicon photodiodes into stable voltage for optical smoke detectors and spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10MHz bandwidth and 20pA input bias current minimizing dark-current error. Use Value: Enables detection of sub-nA photocurrents with <1µV RMS noise floor in 10Hz bandwidth, improving signal-to-noise ratio by 12dB versus bipolar op amps. |
Use Scenario: Amplifying microvolt-level biopotential signals from patient electrodes in portable ECG monitors with battery life constraints. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with rail-to-rail output driving 16-bit delta-sigma ADC reference. Use Value: Delivers 120dB CMRR and 6.5nV/√Hz noise at 1kHz while consuming only 2.3mA per channel, extending battery runtime by 35% versus comparable devices. |
| Industrial Data Acquisition | Portable Test Equipment |
|
Use Scenario: Conditioning analog outputs from RTD, thermocouple, and pressure transducers in modular DAQ systems requiring 4-channel simultaneous sampling. IC Role / Device Role / Timing Role: Quad-channel precision gain stage with matched offset drift (<10mV/°C) ensuring channel-to-channel thermal tracking. Use Value: Maintains <0.01% gain error across –40°C to +85°C ambient, eliminating need for per-channel calibration in Class A industrial sensors. |
Use Scenario: Signal path in handheld multimeters and oscilloscope probes requiring low power, high linearity, and immunity to supply ripple. IC Role / Device Role / Timing Role: Active filter and buffer stage operating from single 9V battery with 4.5V minimum supply support. Use Value: Supports 10MHz bandwidth at 1.8mA typical quiescent current per channel, enabling 100ksps sampling with <0.00005% THD+N at 1kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4134UA | Lower bandwidth (8MHz), higher input bias current (100pA), no guaranteed 125°C operation | Suitable for audio-grade applications but not for high-temp industrial sensing | Select OPA4141AIPWR when >10MHz bandwidth, <20pA IB, or extended temperature range is required. |
| ADA4625-4ARUZ | Higher slew rate (35V/µs vs 20V/ms), lower noise (4.2nV/√Hz), but higher IQ (3.6mA/channel) | Better for high-speed pulse amplification; less optimal for battery-powered long-duration logging | Choose OPA4141AIPWR for ultra-low IB and proven 125°C reliability in harsh environments over raw speed. |
Compared with OPA4134UA and ADA4625-4ARUZ, the OPA4141AIPWR uniquely balances 10MHz bandwidth, 20pA input bias current, and full –40°C to +125°C specification in a cost-effective TSSOP-14 package-making it the preferred choice for thermally demanding, high-impedance sensor signal chains where long-term DC stability is critical.
Availability
OPA4141AIPWR is available at Aetrix Electronics and suitable for photodiode amplification, medical ECG front-ends, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA4141AIPWR 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-power signal conditioning in demanding industrial, medical, and test equipment applications-emphasizing JFET input performance, rail-to-rail output, and robust thermal behavior.
FAQ
What is the maximum capacitive load the OPA4141AIPWR can drive without instability?
The OPA4141AIPWR maintains stability with up to 100pF capacitive load when a 51Ω series resistor (ROUT) is placed between the output and load, as verified in Figure 19 of the SBOS510B datasheet. Driving heavier loads requires isolation via ROUT or external compensation; direct connection to >100pF loads risks overshoot and ringing due to reduced phase margin. This behavior is consistent across all four channels of the OPA4141AIPWR.
Does the OPA4141AIPWR support true single-supply operation below ±2.25V?
No-the OPA4141AIPWR requires a minimum total supply voltage of +4.5V (i.e., V+ = +4.5V, V– = GND) or ±2.25V for dual supply. Below this threshold, the common-mode input range no longer includes the negative rail, degrading linearity and increasing offset error. The OPA4141AIPWR is fully specified only from +4.5V to +36V (single) or ±2.25V to ±18V (dual), and operation outside this range may cause undefined behavior or parametric failure.
How does the OPA4141AIPWR's input bias current compare to bipolar-input op amps in high-impedance sensor circuits?
The OPA4141AIPWR's ±20pA max input bias current is over 1000× lower than typical bipolar-input op amps (e.g., LM324: ~45nA), reducing voltage error across 1MΩ source impedances from ~45mV to <20µV. This enables accurate amplification of signals from photodiodes, pH electrodes, and piezoresistive sensors without guard rings or bias current cancellation networks-directly preserving signal fidelity in the OPA4141AIPWR's front-end stage.
Is the OPA4141AIPWR pin-compatible with other quad op amps in TSSOP-14 packages?
No-the OPA4141AIPWR has a unique pinout optimized for quad JFET-input operation (e.g., V+ on pin 4, V– on pin 8), differing from industry-standard quad layouts like the LM324 or TL084. Substitution requires PCB layout revision. Always verify pin mapping against the "PIN ASSIGNMENTS" diagram in the SBOS510B datasheet before redesigning with the OPA4141AIPWR.
What thermal considerations apply when operating the OPA4141AIPWR at maximum supply voltage?
At ±18V supply and full output loading, the OPA4141AIPWR dissipates up to ~600mW in TSSOP-14 (θJA = 135°C/W), raising junction temperature significantly above ambient. To stay within the 150°C absolute max, ambient must remain ≤70°C with adequate copper pour and airflow. The OPA4141AIPWR includes thermal shutdown at ~180°C, but sustained operation near limits accelerates parameter drift-designers should derate supply voltage or add heatsinking per Figure 33 in SBOS510B.
OPA4141AIPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
OPA4141AIPWR FAQ
1.How can I place an order for OPA4141AIPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4141AIPWR 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 OPA4141AIPWR reliable?
The price and inventory of OPA4141AIPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4141AIPWR is usually 5 days.
3.What payment methods are accepted for OPA4141AIPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4141AIPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4141AIPWR?
OPA4141AIPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4141AIPWR 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 OPA4141AIPWR?
For technical support, including OPA4141AIPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4141AIPWR requirements.
6.How does Aetrix verify that OPA4141AIPWR is sourced from the original manufacturer or authorized distributors?
All OPA4141AIPWR 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 OPA4141AIPWR meets industry standards.
7.What is the process for return or replacement of OPA4141AIPWR?
All OPA4141AIPWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4141AIPWR, 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 OPA4141AIPWR part is unused and in its original packaging.
Return procedure for OPA4141AIPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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