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Texas Instruments OPA4241UA/2K5
- Part No.:
- OPA4241UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4241UA/2K5.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,552
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Product details
Overview
OPA4241UA/2K5 from Texas Instruments is a quad, single-supply, micropower operational amplifier optimized for 5V operation, delivering rail-to-rail output swing within 50mV of rails, ±250μV max input offset voltage, and 25μA quiescent current per amplifier-enabling precision signal conditioning in battery-powered medical instruments and portable test equipment.
For engineers reviewing the OPA4241UA/2K5 datasheet, OPA4241UA/2K5 pinout, OPA4241UA/2K5 application, or OPA4241UA/2K5 equivalent, key selection criteria include its 5V-optimized laser-trimmed offset, 124dB CMRR, unity-gain stability with capacitive loads up to 200pF at 5V, and guaranteed operation from −40°C to +85°C across all four channels.
Technical Context
The OPA4241UA/2K5 belongs to the OPAx241 family, laser-trimmed specifically at 5V for minimal offset voltage (±250μV max) and low drift (±0.4μV/°C), with input common-mode range extending 200mV below V−-making it ideal for single-supply sensor front-ends. Its rail-to-rail output stage supports full dynamic range utilization down to 2.7V supply.
It is unity-gain stable and drives capacitive loads without external compensation: at VS = 5V, G = 1, it remains stable with ≤200pF; performance improves significantly at higher supplies (e.g., ±15V enables ~2700pF drive). No external trim pins are provided on the quad version-offset adjustment is available only on single-channel variants (OPA241/OPA251).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | Single: 2.7V–36V; dual: ±1.35V–±18V - supports wide-input industrial and battery systems without level-shifting. |
| Quiescent Current | ±25 μA per amplifier - enables multi-channel operation in ultra-low-power devices (e.g., 100μA total for all four op-amps). |
| Input Offset Voltage | ±250 μV max (TA = −40°C to +85°C) - eliminates need for user trimming in most precision DC-coupled applications. |
| CMRR | 124 dB - rejects common-mode noise from noisy power rails or shared ground paths in portable instrumentation. |
| Output Swing | Within 50 mV of rails (AOL > 70 dB) - preserves >98% of full-scale dynamic range at low supply voltages. |
| Gain-Bandwidth | 35 kHz - suitable for low-frequency signal conditioning (e.g., ECG, thermocouple amplification, pH sensing). |
| Open-Loop Gain | 120 dB - ensures <0.01% gain error in closed-loop configurations with gains up to 100. |
Pinout & Package
OPA4241UA/2K5 is packaged in a 14-pin SOIC (D package), with exposed pad not present and standard JEDEC-compliant footprint for automated assembly and thermal reliability in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts high-impedance sensor signals (e.g., thermistor bridge) with 1 GΩ || 4 pF common-mode input impedance. |
| −IN A (Pin 2) | Inverting input, Channel A | Used for feedback configuration; input bias current ≤ −20 nA minimizes offset in high-Z networks. |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable; delivers ±24 mA sink/source into 10 kΩ load while maintaining linearity near supply rails. |
| V+ (Pin 4) | Positive power supply | Connects to main system rail (e.g., 3.3V or 5V); bypass with 0.01 μF ceramic capacitor for PSRR optimization. |
| V− (Pin 11) | Negative power supply | Ground reference in single-supply mode; common-mode input extends to (V−) − 0.2 V for enhanced headroom. |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent channel for differential pair processing or multi-sensor signal chains (e.g., dual-axis accelerometer). |
| −IN B (Pin 6) | Inverting input, Channel B | Enables independent gain-setting per channel without crosstalk (channel separation ≥ 106 dB at DC). |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated output stage; no internal trimming connections - unlike single variants, quad has no TRIM pins. |
| +IN C (Pin 10) | Noninverting input, Channel C | Supports three-channel simultaneous acquisition (e.g., 3-phase current monitoring in portable motor controllers). |
| −IN C (Pin 9) | Inverting input, Channel C | Validated for use with 100 kΩ feedback networks; maintains 120 dB open-loop gain up to 100 mV from rails. |
| OUT C (Pin 8) | Output, Channel C | Capable of driving 100 pF directly; larger loads require series resistor in feedback path per Figure 6-4 in datasheet. |
| +IN D (Pin 12) | Noninverting input, Channel D | Enables fourth independent analog path - e.g., reference buffer, calibration channel, or auxiliary sensor interface. |
| −IN D (Pin 13) | Inverting input, Channel D | Matches input characteristics of other channels: IB ≤ −20 nA, CMRR = 124 dB, and 1.7 μVPP 0.1–10 Hz noise. |
| OUT D (Pin 14) | Output, Channel D | Full rail-to-rail swing with 50 mV margin; short-circuit protected to ±24 mA sink/source per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset at 5V | ±250 μV max over −40°C to +85°C - eliminates factory calibration in portable 5V-sensor nodes. |
| Rail-to-rail output | Swings within 50 mV of V+ and V− at AOL > 70 dB - maximizes ADC utilization in 3.3V/5V data acquisition systems. |
| Ultra-low quiescent current | 25 μA per amplifier - enables 4-channel precision amplification with <100 μA total supply current. |
| High CMRR (124 dB) | Rejects power-supply ripple and ground bounce in battery-powered handheld devices with shared return paths. |
| Unity-gain stable | Drives ≥200 pF capacitive loads at 5V without oscillation - simplifies anti-aliasing filter design with ceramic capacitors. |
| Extended common-mode range | Inputs operate down to (V−) − 0.2 V - supports direct interfacing to transducers referenced below ground (e.g., shunt-based current sense). |
Applications
| Battery-Powered ECG Monitor | Portable pH Meter |
|---|---|
|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in a handheld ECG device powered by two AA cells. IC Role / Device Role / Timing Role: Quad-channel instrumentation front-end: Channels A/B form a differential pair for lead-I acquisition; C/D buffer reference and drive ADC driver stage. Use Value: 25 μA per amplifier enables >100-hour battery life; rail-to-rail output ensures full 12-bit ADC range utilization at 3.3V supply. |
Use Scenario: Conditioning high-impedance glass electrode output (≥100 MΩ) in a field-deployable pH meter with LCD display and USB charging. IC Role / Device Role / Timing Role: High-input-impedance buffer (Channel A), precision reference buffer (Channel B), temperature-compensation amplifier (Channel C), and display driver buffer (Channel D). Use Value: 1 GΩ || 4 pF input impedance prevents electrode loading; ±250 μV offset ensures <0.01 pH unit error without recalibration. |
| Low-Power Data Logger | Handheld Multimeter Front-End |
|
Use Scenario: Simultaneous acquisition of temperature, humidity, and ambient light using analog sensors in a solar-charged environmental logger. IC Role / Device Role / Timing Role: Four independent sensor signal conditioners: one per sensor type, each configured as noninverting amplifier with gain = 10–100. Use Value: 35 kHz GBW supports 10-sample/s logging with <1% settling error; 120 dB open-loop gain guarantees <0.005% gain drift over temperature. |
Use Scenario: Precision DC/AC voltage, current, and resistance measurement in a pocket-sized multimeter with auto-ranging and bar-graph display. IC Role / Device Role / Timing Role: Input protection and scaling amplifier (Channel A), current-sense amplifier (Channel B), reference buffer (Channel C), and display driver (Channel D). Use Value: 124 dB CMRR rejects switching noise from internal DC-DC converter; 50 mV rail margin enables accurate zero-volt measurement at 3.3V supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4251UA/2K5 | Optimized for ±15V operation; ±100μV max offset at ±15V vs. ±250μV at 5V; higher IQ (±27 μA typ) and wider GBW (30 kHz at ±15V). | Preferred in dual-supply bench instruments; less optimal for 3.3V/5V battery systems due to degraded offset at low VS. | Select OPA4251UA/2K5 only when operating at ±12V–±15V with need for tighter offset at high supply; otherwise OPA4241UA/2K5 is superior for low-VS designs. |
| TLV2474IDR | Higher IQ (600 μA per amp); rail-to-rail I/O; 2.8 MHz GBW; ±3.5 mV offset - 14× higher offset and 24× higher current than OPA4241UA/2K5. | Suitable for higher-speed, non-battery-critical applications; lacks micropower capability and precision offset for medical-grade sensing. | Choose TLV2474IDR only when bandwidth >1 MHz is required and power budget allows >2.4 mA total; not a functional replacement for micropower precision use cases. |
Compared with OPA4241UA/2K5, OPA4251UA/2K5 trades 5V-optimized offset and ultralow IQ for better high-supply performance, while TLV2474IDR sacrifices micropower and precision for speed-making OPA4241UA/2K5 the sole choice for sub-100 μA, sub-0.25 mV, 3.3V–5V portable instrumentation.
Availability
OPA4241UA/2K5 is available at Aetrix Electronics and suitable for battery-operated instruments, portable medical devices, and handheld test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4241UA/2K5 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 low-power signal chain solutions.
The OPAx241 family-including OPA4241UA/2K5-is designed specifically for micropower, single-supply, precision analog signal conditioning in portable and battery-constrained applications where offset, supply voltage, and quiescent current are critical.
FAQ
What is the maximum capacitive load the OPA4241UA/2K5 can drive stably at 5V supply?
The OPA4241UA/2K5 remains unity-gain stable with up to 200 pF capacitive load when operated at VS = 5V, G = 1, and IOUT = 0. Exceeding this requires adding a series resistor (e.g., 5 kΩ) inside the feedback loop as shown in Figure 6-4 of the datasheet-this preserves DC accuracy while enabling >1000 pF drive at lower supply voltages like ±1.35V.
Does the OPA4241UA/2K5 have external offset trim pins?
No, the OPA4241UA/2K5 does not include external offset trim pins. Trim capability is provided only on the single-channel variants OPA241 and OPA251 (on pins 1 and 5). The quad OPA4241UA/2K5 relies entirely on factory laser trimming for its ±250 μV max offset specification and offers no user-accessible adjustment.
What is the operating temperature range guaranteed for the OPA4241UA/2K5?
The OPA4241UA/2K5 is fully specified and production-tested over −40°C to +85°C. It is also rated to operate across −55°C to +125°C, though electrical parameters outside the −40°C to +85°C range are not guaranteed-designs requiring extended temperature performance must validate key specs (e.g., offset, CMRR) under actual conditions.
Can the OPA4241UA/2K5 be used with a 3.3V single supply?
Yes, the OPA4241UA/2K5 supports single-supply operation from 2.7V to 36V, making 3.3V fully compatible. At 3.3V, it maintains rail-to-rail output swing within 50 mV of rails, 124 dB CMRR, and 25 μA quiescent current per amplifier-ideal for modern low-voltage portable systems powered by Li-ion or regulated 3.3V rails.
How does the OPA4241UA/2K5 compare to the OPA4251UA/2K5 in low-voltage operation?
The OPA4241UA/2K5 is laser-trimmed at 5V and optimized for low offset (±250 μV max) and drift (±0.4 μV/°C) in 2.7V–5V systems; the OPA4251UA/2K5 is trimmed at ±15V and exhibits higher offset (±150 μV max) and drift (±0.6 μV/°C) at 5V. For 3.3V/5V battery applications, OPA4241UA/2K5 delivers superior precision and lower power.
OPA4241UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4241UA/2K5 FAQ
1.How can I place an order for OPA4241UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4241UA/2K5 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 OPA4241UA/2K5 reliable?
The price and inventory of OPA4241UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4241UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4241UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4241UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4241UA/2K5?
OPA4241UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4241UA/2K5 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 OPA4241UA/2K5?
For technical support, including OPA4241UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4241UA/2K5 requirements.
6.How does Aetrix verify that OPA4241UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4241UA/2K5 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 OPA4241UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4241UA/2K5?
All OPA4241UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4241UA/2K5, 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 OPA4241UA/2K5 part is unused and in its original packaging.
Return procedure for OPA4241UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4241UA/2K5 Tags
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