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Analog Devices Inc./Maxim Integrated MAX44241AUA+T
- Part No.:
- MAX44241AUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX44241AUA+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,046
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Product details
Overview
MAX44241AUA+T from Maxim Integrated is a 36V, single-channel, ultra-precision, low-noise operational amplifier featuring chopper-stabilized and auto-zeroing architecture. It delivers 5µV max input offset voltage, 20nV/°C max offset drift, 9nV/√Hz input voltage noise at 1kHz, rail-to-rail output, and operates from 2.7V to 36V supply. It is used in high-accuracy load cell amplifiers and precision ADC front-ends.
For engineers reviewing the MAX44241AUA+T datasheet, MAX44241AUA+T pinout, MAX44241AUA+T application, or MAX44241AUA+T equivalent, key selection criteria include guaranteed 5µV VOS over temperature, 1µs settling time to 0.01%, integrated EMI filtering, and SO-8 package compatibility with industrial-grade -40°C to +125°C operation.
Technical Context
The MAX44241AUA+T employs patented dual-stage correction-chopper stabilization for 1/f noise suppression and auto-zeroing for DC offset cancellation-enabling near-zero drift without sacrificing bandwidth. Its BiCMOS process supports 5MHz gain-bandwidth product and 3.8V/µs slew rate while maintaining ultra-low quiescent current (0.42mA typical).
This architecture eliminates traditional trade-offs between precision and speed: it achieves 146dB min CMRR and 148dB min PSRR across -40°C to +125°C while sustaining stable operation into 300pF capacitive loads and delivering rail-to-rail output swing within 130mV of rails at full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 5µV (max) - enables sub-16-bit accuracy in 24-bit ADC systems without calibration |
| Offset Drift | 20nV/°C (max) - ensures <1µV total drift over full -40°C to +125°C range |
| Voltage Noise Density | 9nV/√Hz at 1kHz - supports low-frequency precision sensing below 1Hz |
| Gain-Bandwidth Product | 5MHz - allows stable closed-loop gain ≥10 at 500kHz signal bandwidth |
| Settling Time | 1µs to 0.01% - meets fast-sampling ADC buffer requirements (e.g., 1MSPS) |
| Supply Range | 2.7V to 36V single supply - interfaces directly with industrial ±15V analog front-ends |
| Rail-to-Rail Output | VOL = 180mV max, VOH = VDD–0.25V max - maximizes dynamic range in unipolar systems |
Pinout & Package
The MAX44241AUA+T is housed in an 8-pin µMAX (FMAX) package - a miniature 3mm × 3mm SOIC-compatible outline with exposed pad for thermal enhancement. Pin 1 is OUTA, Pin 2 is VSS, Pin 3 is INA+, Pin 4 is INA-, Pin 5 is VDD, Pins 6–8 are no-connect (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Amplifier A Output | Drives ADC input or feedback network; rail-to-rail swing supports full-scale utilization |
| 2 (VSS) | Negative Supply | Ground reference for single-supply operation; must be low-impedance for noise immunity |
| 3 (INA+) | Inverting Input | High-impedance node (2pF input capacitance); requires matched layout to minimize thermoelectric offset |
| 4 (INA-) | Noninverting Input | Same impedance as INA+; differential pair inputs enable precision instrumentation configurations |
| 5 (VDD) | Positive Supply | Accepts up to 36V; internal EMI filter suppresses RF interference on power rail |
| 6–8 (N.C.) | No Connection | Not internally bonded; must remain floating per datasheet to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Integrated EMI Filter | Rejects >60dB RF interference up to 1GHz, eliminating external R-C filters in noisy industrial environments |
| Chopper + Auto-Zero Hybrid | Eliminates 1/f noise and long-term drift simultaneously - no warm-up period or periodic recalibration needed |
| Low Quiescent Current | 0.42mA per channel enables battery-powered precision instruments with >1-year runtime on AA cells |
| Wide Common-Mode Range | (VSS – 0.05V) to (VDD – 1.5V) supports direct connection to transducer bridges biased above ground |
| Capacitive Load Drive | Stable with up to 300pF output load - simplifies anti-aliasing filter design without isolation resistors |
Applications
| Battery-Powered Equipment | PLC Analog I/O Modules |
|---|---|
Use Scenario: Portable multimeters and handheld calibration tools requiring microvolt-level accuracy over extended field use. IC Role / Device Role / Timing Role: Front-end amplifier for 24-bit sigma-delta ADC, providing gain and offset correction before digitization. Use Value: 5µV VOS and 20nV/°C drift eliminate need for onboard zero-calibration routines, reducing firmware complexity and test time. | Use Scenario: Industrial programmable logic controller modules measuring 4–20mA loop signals and thermocouple outputs. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between isolated sensor inputs and ADC drivers in multi-channel data acquisition. Use Value: 146dB CMRR and 148dB PSRR maintain signal integrity despite shared power rails and ground noise in dense backplane environments. |
| Transducer Amplifiers | Load Cell Amplifiers |
Use Scenario: High-resolution pressure transducers in medical ventilators where signal fidelity impacts patient safety. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage for millivolt-level bridge outputs, rejecting common-mode noise from switching power supplies. Use Value: 9nV/√Hz noise density and integrated EMI filter ensure clean signal acquisition even when mounted adjacent to DC-DC converters. | Use Scenario: Weighing scales and force measurement systems demanding 0.001% linearity over temperature. IC Role / Device Role / Timing Role: Instrumentation amplifier core (with external resistors) for Wheatstone bridge excitation and differential output conditioning. Use Value: Near-zero drift guarantees repeatability across daily thermal cycles without mechanical zeroing or software compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA189IDBVR | Lower 1/f noise (0.1Hz–10Hz: 65nVP-P vs. 117nVP-P), but higher 9.8nV/√Hz broadband noise and no integrated EMI filter | Preferred in ultra-low-frequency (<0.1Hz) biomedical sensors; less robust in factory-floor EMI environments | Select OPA189IDBVR only if sub-0.1Hz noise dominates system error budget and board-level EMI mitigation is feasible |
| ADA4522-1ARZ | Higher 5.8µV max VOS and 30nV/°C drift, but superior 120dB min PSRR at 1MHz and lower 5.2nV/√Hz noise | Better suited for high-frequency precision control loops (e.g., motor current sensing at 20kHz PWM edges) | Choose ADA4522-1ARZ when wideband PSRR and lower broadband noise outweigh ultra-low DC drift requirements |
Compared with OPA189IDBVR and ADA4522-1ARZ, the MAX44241AUA+T uniquely combines sub-5µV VOS, <20nV/°C drift, integrated EMI rejection, and 36V operation - making it optimal for industrial weigh scales, PLC analog inputs, and battery-powered test equipment where DC accuracy and noise immunity are co-critical.
Availability
MAX44241AUA+T is available at Aetrix Electronics and suitable for battery-powered equipment, PLC analog I/O modules, and transducer amplifiers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX44241AUA+T 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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications, with emphasis on precision, reliability, and integration.
The MAX44241AUA+T belongs to Maxim's ultra-precision op amp family engineered specifically for DC-critical applications such as strain gauge interfaces, high-resolution data acquisition, and calibration-grade instrumentation where offset, drift, and noise must be minimized without external trimming.
FAQ
What is the maximum operating temperature range for the MAX44241AUA+T?
The MAX44241AUA+T is rated for continuous operation from -40°C to +125°C ambient temperature. This industrial-grade range is validated across all electrical specifications including input offset voltage (5µV max), offset drift (20nV/°C max), and PSRR (146dB min), ensuring reliable performance in harsh environments like factory automation and outdoor instrumentation where thermal cycling occurs.
Does the MAX44241AUA+T require external components for EMI suppression?
No, the MAX44241AUA+T integrates an on-chip EMI filter that provides >60dB rejection of radio-frequency interference up to 1GHz. This eliminates the need for external RC filters or ferrite beads in most industrial applications, reducing BOM count and PCB area while maintaining immunity to GSM, Wi-Fi, and switching power supply noise - a key advantage confirmed in Maxim's EMIRR characterization (toc30).
Can the MAX44241AUA+T drive a 10kΩ load while maintaining rail-to-rail output swing?
Yes, the MAX44241AUA+T maintains rail-to-rail output capability into 10kΩ loads across its full temperature range. At TA = +25°C, VOH = VDD–0.05V and VOL = 40mV; at -40°C to +125°C, VOH = VDD–0.09V and VOL = 60mV. These specs ensure >99% of supply rail utilization for 24-bit ADC interfacing without gain compression or clipping in precision measurement circuits.
How does the chopper + auto-zero architecture of the MAX44241AUA+T differ from standard zero-drift op amps?
The MAX44241AUA+T uses a hybrid architecture: chopper stabilization cancels 1/f noise and low-frequency drift, while auto-zeroing corrects residual offset and higher-frequency errors. Unlike pure chopper amps (which suffer from switching glitches) or pure auto-zero amps (which exhibit higher broadband noise), this dual technique achieves 9nV/√Hz noise at 1kHz and 117nVP-P 0.1Hz–10Hz noise - verified in the device's toc19 and toc20 plots - without output ripple or settling penalties.
Is the MAX44241AUA+T pin-compatible with other devices in the MAX4424x family?
No, the MAX44241AUA+T (single-channel, 8-pin µMAX) is not pin-compatible with the MAX44243 (quad, 14-pin SO/TSSOP) or MAX44246 (dual, 8-pin SO). While all share identical electrical specs and architecture, their pinouts differ fundamentally: MAX44241AUA+T has dedicated N.C. pins (6–8), whereas MAX44246 uses those pins for INB+/INB-/OUTB. Board redesign is required for substitution between family members.
MAX44241AUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 3.8V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 300 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 420µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX44241AUA+T FAQ
1.How can I place an order for MAX44241AUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX44241AUA+T 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 MAX44241AUA+T reliable?
The price and inventory of MAX44241AUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX44241AUA+T is usually 5 days.
3.What payment methods are accepted for MAX44241AUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX44241AUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX44241AUA+T?
MAX44241AUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX44241AUA+T 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 MAX44241AUA+T?
For technical support, including MAX44241AUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX44241AUA+T requirements.
6.How does Aetrix verify that MAX44241AUA+T is sourced from the original manufacturer or authorized distributors?
All MAX44241AUA+T 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 MAX44241AUA+T meets industry standards.
7.What is the process for return or replacement of MAX44241AUA+T?
All MAX44241AUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX44241AUA+T, 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 MAX44241AUA+T part is unused and in its original packaging.
Return procedure for MAX44241AUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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