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Texas Instruments OPA4241PA
- Part No.:
- OPA4241PA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA4241PA.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,229
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Product details
Overview
OPA4241PA from Texas Instruments is a quad, single-supply, micropower operational amplifier optimized for 5V operation, featuring 25μA quiescent current per amplifier, ±250μV max input offset voltage, rail-to-rail output swing within 50mV of rails, and 124dB common-mode rejection - deployed in battery-powered medical instruments and portable test equipment.
For engineers reviewing the OPA4241PA datasheet, OPA4241PA pinout, OPA4241PA application, or OPA4241PA equivalent, key selection criteria include ultra-low power consumption at low supply voltage, guaranteed rail-to-rail output performance across –40°C to +85°C, and quad-channel integration in 14-pin SOIC or PDIP packages for space-constrained analog signal conditioning.
Technical Context
The OPA4241PA belongs to the OPAx241 family, laser-trimmed at 5V for minimal offset voltage (±250μV max) and drift (±0.4μV/°C), with unity-gain stability and capacitive load drive capability up to 200pF at VS = 5V, G = 1. Its input common-mode range extends 200mV below V–, enabling robust single-supply sensing near ground.
It operates from 2.7V to 36V single supply or ±1.35V to ±18V dual supply, maintains 128dB open-loop gain and 35kHz gain-bandwidth product at low voltage, and delivers 4mA source / –24mA sink short-circuit current - all while sustaining rail-to-rail output swing under 100kΩ load and >100dB AOL down to 100mV from rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 25μA per amplifier - enables multi-year battery life in always-on portable instrumentation |
| Input Offset Voltage | ±250μV max - eliminates need for external trimming in precision DC-coupled sensor interfaces |
| Rail-to-Rail Output | Swings within 50mV of supply rails - maximizes dynamic range in 3.3V or 5V systems without level-shifting |
| Common-Mode Rejection | 124dB - rejects noise in high-impedance single-ended sensor front-ends operating near supply rails |
| Supply Range | 2.7V to 36V single supply - supports direct connection to Li-ion, alkaline, or industrial 24V rails |
| Gain-Bandwidth Product | 35kHz - sufficient for anti-aliasing, sensor amplification, and low-frequency active filtering |
| Operating Temperature | –40°C to +85°C - qualified for industrial and medical environments without derating |
Pinout & Package
OPA4241PA is available in 14-pin PDIP (P) and 14-pin SOIC (D) packages. Pin functions are identical across both packages per Figure 4-3 and Table 4-3 of SBOS075A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts high-impedance sensor or reference signals; CMVR extends to V– – 0.2V |
| –IN A (Pin 2) | Inverting input, Channel A | Configures standard op-amp topologies (inverting amp, transimpedance, difference amp) |
| OUT A (Pin 1) | Output, Channel A | Delivers rail-to-rail voltage with 4mA source / –24mA sink capability into 10kΩ loads |
| V+ (Pin 4) | Positive power supply | Connects to main supply rail (2.7V–36V); bypass with 0.01μF ceramic capacitor |
| V– (Pin 11) | Negative power supply | Ground or negative rail; input CMVR extends 200mV below this node |
| +IN B (Pin 5), –IN B (Pin 6), OUT B (Pin 7) | Channel B inputs/outputs | Independent, matched performance to Channel A; no internal trim pins on quad version |
| +IN C (Pin 10), –IN C (Pin 9), OUT C (Pin 8) | Channel C inputs/outputs | Identical electrical specs; enables 3-channel simultaneous signal conditioning |
| +IN D (Pin 12), –IN D (Pin 13), OUT D (Pin 14) | Channel D inputs/outputs | Full quad functionality; channel separation < 0.3μV/V ensures minimal crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset at 5V | ±250μV max initial offset enables precision DC gain stages without calibration overhead |
| Rail-to-rail output stage | 50mV headroom at full load preserves >98% of supply-referenced dynamic range in 3.3V systems |
| Unity-gain stable architecture | Drives ≥200pF capacitive loads directly - simplifies sensor interface design without external compensation |
| Wide supply flexibility | Operates identically from 2.7V single supply or ±15V dual supply - reduces BOM count across product variants |
| High CMRR (124dB) | Rejects EMI and ground bounce in battery-powered handheld devices with unshielded PCB layouts |
Applications
| Battery-Powered ECG Front-End | Portable pH Meter Signal Chain |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in a handheld ECG monitor powered by two AA cells. IC Role / Device Role / Timing Role: Quad OPA4241PA configures three channels as low-noise instrumentation amps (INA) and one as reference buffer - all operating from 3V supply. Use Value: 25μA per amplifier extends battery life beyond 12 months; rail-to-rail output captures full ECG waveform amplitude without clipping. |
Use Scenario: Conditioning mV-level output from glass pH electrode and temperature sensor in field-deployable water quality tester. IC Role / Device Role / Timing Role: One channel buffers pH electrode output, second performs RTD linearization, third drives ADC reference, fourth conditions thermistor signal. Use Value: ±250μV offset ensures <0.01pH measurement error; 124dB CMRR rejects common-mode noise from shared battery ground. |
| Low-Power Industrial Sensor Node | Handheld Multimeter Analog Front-End |
Use Scenario: Signal conditioning for 4–20mA loop-powered pressure and humidity sensors in wireless IIoT nodes. IC Role / Device Role / Timing Role: Configured as precision current-to-voltage converter, filter, and level shifter - all within 100μA total analog subsystem current. Use Value: 2.7V minimum supply allows operation during brownout; 35kHz GBW supports anti-aliasing filtering before 100ksps SAR ADC. |
Use Scenario: Input protection, attenuation, and buffer stages in autoranging digital multimeter with 6½-digit resolution. IC Role / Device Role / Timing Role: Dual channels implement high-Z input buffer and precision attenuator; remaining two handle auto-zero and reference scaling. Use Value: 128dB open-loop gain ensures <1ppm linearity error; rail-to-rail output drives ADC input without external level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4341UA | Higher quiescent current (125μA), 1MHz GBW, no laser trim (±3mV VOS) | Better for higher-speed AC-coupled apps; unsuitable for sub-μV DC precision | Select when bandwidth >100kHz required and battery life less critical |
| LM324N | Higher IQ (1.4mA), ±7mV VOS, no rail-to-rail output (1.5V headroom), wider temp range (–40°C to +125°C) | Lower cost for non-critical industrial controls; cannot resolve mV-level sensor outputs near rails | Choose only for cost-sensitive, non-battery applications where precision and low power are secondary |
Compared with OPA4341UA and LM324N, the OPA4241PA uniquely delivers micropower operation, laser-trimmed DC precision, and rail-to-rail output in a quad configuration - making it irreplaceable for long-life, high-accuracy portable instrumentation where every microamp and millivolt matters.
Availability
OPA4241PA is available at Aetrix Electronics and suitable for battery-operated instruments, portable medical devices, and handheld test equipment requiring stable component supply across extended production lifecycles.
Supply support for OPA4241PA 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 company delivering analog and embedded processing solutions, with leadership in precision analog ICs since 1930.
The OPAx241 series was designed specifically for ultra-low-power, high-precision signal conditioning in battery-constrained portable instrumentation - emphasizing DC accuracy, rail-to-rail operation, and thermal stability over wide supply ranges.
FAQ
What is the maximum supply voltage for OPA4241PA?
The OPA4241PA supports single-supply operation up to 36V or dual-supply operation up to ±18V, with absolute maximum ratings specifying 36V for single supply and ±18V for dual supply. Operation at these extremes is permitted but may reduce offset voltage accuracy compared to its 5V-optimized trim point; full specifications are guaranteed from 2.7V to 30V single supply or ±1.35V to ±15V dual supply.
Does OPA4241PA have external offset trim pins?
No, the OPA4241PA quad version does not include external offset trim pins. Trim capability is provided only on the single-channel OPA241 and OPA251 variants (pins 1 and 5). The OPA4241PA relies on laser trimming during manufacturing to achieve ±250μV max input offset voltage, eliminating the need for user adjustment in most precision applications.
Can OPA4241PA drive capacitive loads, and how much?
Yes, the OPA4241PA is unity-gain stable and can drive up to 200pF capacitive load at VS = 5V, G = 1, and zero output current. With increased supply voltage (e.g., ±15V) or higher closed-loop gain, capacitive load drive improves significantly - up to ~2700pF. For loads exceeding 200pF at low supply, a small series resistor (e.g., 5kΩ) in the feedback path restores stability while preserving DC accuracy.
What is the input common-mode voltage range for OPA4241PA?
The input common-mode voltage range for OPA4241PA extends from (V–) – 0.2V to (V+) – 0.8V. This means it accepts signals 200mV below the negative supply rail - a critical feature for single-supply operation where sensor outputs may sit near ground. At 3V supply (V– = 0V, V+ = 3V), usable input range is –0.2V to +2.2V.
Is OPA4241PA specified for operation at –55°C or +125°C?
The OPA4241PA is fully specified over –40°C to +85°C for electrical parameters including offset voltage, CMRR, and open-loop gain. It can operate outside this range from –55°C to +125°C, but only basic functionality is guaranteed; parameters such as input offset drift and gain accuracy are not characterized or warranted beyond the –40°C to +85°C range.
OPA4241PA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.01V/µs
- Gain Bandwidth Product:
- 35 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 nA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 25µA (x4 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
OPA4241PA FAQ
1.How can I place an order for OPA4241PA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4241PA 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 OPA4241PA reliable?
The price and inventory of OPA4241PA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4241PA is usually 5 days.
3.What payment methods are accepted for OPA4241PA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4241PA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4241PA?
OPA4241PA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4241PA 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 OPA4241PA?
For technical support, including OPA4241PA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4241PA requirements.
6.How does Aetrix verify that OPA4241PA is sourced from the original manufacturer or authorized distributors?
All OPA4241PA 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 OPA4241PA meets industry standards.
7.What is the process for return or replacement of OPA4241PA?
All OPA4241PA units undergo pre-shipment inspection (PSI). If there is an issue with OPA4241PA, 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 OPA4241PA part is unused and in its original packaging.
Return procedure for OPA4241PA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4241PA Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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