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Analog Devices Inc./Maxim Integrated MAX44241AUA+
- Part No.:
- MAX44241AUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX44241AUA+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:389
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Product details
Overview
MAX44241AUA+ 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 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+ datasheet, MAX44241AUA+ pinout, MAX44241AUA+ application, or MAX44241AUA+ equivalent, key selection criteria include guaranteed -40°C to +125°C operation, 1µs settling time to 0.01%, 5MHz gain-bandwidth product, integrated EMI filter, and SO-8 package compatibility with industrial analog I/O modules.
Technical Context
The MAX44241AUA+ employs patented dual-stage correction-chopper stabilization for 1/f noise suppression and auto-zeroing for DC offset cancellation-enabling near-zero drift over temperature and time. Its BiCMOS process supports rail-to-rail output swing while maintaining 0.42mA typical quiescent current per channel.
It achieves 146dB min PSRR and 146dB min CMRR across its full common-mode range (GND – 0.05V to VDD – 1.5V), with 154dB min open-loop gain and 3.8V/µs slew rate. The device includes internal back-to-back input clamp diodes and is rated for ±40V absolute maximum supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 36V - supports wide-input industrial sensors and high-voltage front-ends without external regulators. |
| Input Offset Voltage (max) | 5µV - enables sub-16-bit accuracy in 24-bit ADC buffer applications without calibration. |
| Offset Drift (max) | 20nV/°C - ensures stable DC gain over full -40°C to +125°C operating range. |
| Voltage Noise Density | 9nV/√Hz at 1kHz - critical for low-frequency precision transducer signal conditioning. |
| Gain-Bandwidth Product | 5MHz - allows stable unity-gain buffering of fast step signals with 1µs settling to 0.01%. |
| Quiescent Current (typ) | 0.42mA per channel - balances ultra-precision performance with battery-compatible power budget. |
| Rail-to-Rail Output | Swings within 130mV of rails at 25°C - maximizes dynamic range into ADCs with 2.7–3.6V supplies. |
Pinout & Package
The MAX44241AUA+ is housed in an 8-pin µMAX (FMAX) package - a miniature 3mm × 3mm, 0.8mm height, lead-free RoHS-compliant SOIC-compatible outline with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUTA | Channel A Output | Delivers rail-to-rail buffered signal; capable of sourcing 30mA/sinking 40mA (noncontinuous). |
| 2 INA− | Inverting Input | Differential input node; 2pF input capacitance minimizes phase shift in high-Z sensor interfaces. |
| 3 INA+ | Noninverting Input | High-impedance input (600pA max bias current at 25°C); matched to INA− for optimal CMRR. |
| 4 VSS | Negative Supply | Ground reference for single-supply operation or negative rail in dual-supply configurations. |
| 5 VDD | Positive Supply | Accepts 2.7V–36V; 40V absolute max rating enables robust overvoltage tolerance. |
| 6 N.C. | No Connection | Internally unconnected; must be left floating or tied to GND per layout guidelines. |
| 7 N.C. | No Connection | Internally unconnected; no routing or loading required. |
| 8 N.C. | No Connection | Internally unconnected; PCB land pattern must match µMAX-8 footprint (outline 21-0036). |
Key Features
| Feature | Design Value |
|---|---|
| Chopper + Auto-Zero Hybrid Architecture | Eliminates 1/f noise and drift simultaneously-enables true DC precision without trade-offs in bandwidth or noise floor. |
| Integrated EMI Filter | Passive on-chip RC network suppresses RF interference up to 1GHz, preventing output corruption in noisy industrial environments. |
| Guaranteed Operation to +125°C | Specified performance across full -40°C to +125°C range-validates use in under-hood automotive and PLC analog I/O modules. |
| Low 0.42mA Quiescent Current | Enables always-on precision sensing in battery-powered equipment without compromising offset or noise specs. |
| 1µs Settling Time (0.01%) | Supports high-speed multiplexed data acquisition systems where amplifier settling dominates system throughput. |
Applications
| Battery-Powered Equipment | PLC Analog I/O Modules |
|---|---|
Use Scenario: Portable multimeters and handheld test instruments requiring long battery life and stable DC accuracy over temperature. IC Role / Device Role / Timing Role: Precision buffer and gain stage preceding 24-bit delta-sigma ADCs, rejecting supply ripple and common-mode noise. Use Value: 5µV max VOS and 20nV/°C drift eliminate field recalibration; 0.42mA IQ extends 9V battery life beyond 1000 hours in continuous measurement mode. | Use Scenario: Industrial programmable logic controller analog input cards measuring 4–20mA loops and thermocouple signals. IC Role / Device Role / Timing Role: High-CMRR front-end amplifier driving SAR or sigma-delta ADCs with >100dB 50/60Hz rejection. Use Value: 146dB min CMRR and PSRR ensure immunity to ground bounce and power rail noise in dense backplane environments. |
| Transducer Amplifiers | Load Cell Amplifiers |
Use Scenario: Strain gauge, pressure, and flow transducers producing microvolt-level differential outputs in harsh EMI environments. IC Role / Device Role / Timing Role: Low-noise, EMI-hardened instrumentation amplifier core with integrated filtering and rail-to-rail output drive. Use Value: 9nV/√Hz noise density and on-chip EMI filter enable direct connection to unshielded transducer cables without external RFI suppression. | Use Scenario: Weigh scales and force measurement systems using full-bridge load cells with ±10V excitation. IC Role / Device Role / Timing Role: Ultra-low-drift gain stage amplifying mV-level bridge outputs before 18-bit ADCs like MAX11211. Use Value: Near-zero drift preserves calibration stability over 10+ years; 1µs settling supports rapid weight capture in dynamic weighing applications. |
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 | Single 36V zero-drift op amp; 4.2nV/√Hz noise (lower), 0.1µV/V PSRR (higher), but 1.3mA IQ (3× higher). | Preferred in ultra-low-noise lab instrumentation; less suitable for battery-powered designs due to higher quiescent current. | Select OPA189IDBVR when noise floor is primary constraint and power budget allows >1mA/channel. |
| LTC2057HMS8#PBF | Single 36V zero-drift op amp; 10nV/√Hz noise, 5µV max VOS, but only rated to +105°C (not +125°C). | Suitable for commercial/industrial ambient environments; not qualified for extended-temperature PLC or automotive under-hood use. | Select LTC2057HMS8#PBF where temperature range ≤ +105°C suffices and board space permits MSOP-8. |
Compared with OPA189IDBVR and LTC2057HMS8#PBF, the MAX44241AUA+ uniquely balances ultra-low drift (5µV/20nV/°C), industry-leading EMI immunity, and 0.42mA IQ in a compact µMAX package-making it optimal for space-constrained, wide-temperature, battery-aware precision analog I/O.
Availability
MAX44241AUA+ is available at Aetrix Electronics and suitable for PLC analog I/O modules, battery-powered test equipment, and load cell amplifiers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX44241AUA+ 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, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX44241AUA+ belongs to Maxim's ultra-precision zero-drift op amp family, engineered specifically for DC-critical applications demanding long-term stability, low noise, and immunity to EMI-such as industrial sensor signal chains and high-resolution data acquisition.
FAQ
What is the operating temperature range specified for the MAX44241AUA+?
The MAX44241AUA+ is fully specified and production-tested over the industrial temperature range of -40°C to +125°C. All key parameters-including input offset voltage, drift, PSRR, and CMRR-are guaranteed across this range per the datasheet's Electrical Characteristics tables. This makes the MAX44241AUA+ suitable for under-hood automotive, motor control, and industrial PLC applications where ambient temperatures exceed +85°C.
Does the MAX44241AUA+ require external compensation or filtering for stability?
No, the MAX44241AUA+ is unity-gain stable and does not require external compensation. It remains stable with capacitive loads up to 300pF and exhibits 60° phase margin with 20pF load. Its integrated EMI filter eliminates need for external RF suppression components. Layout best practices-such as short input traces, symmetric routing, and ground plane flooding-are recommended to preserve its 9nV/√Hz noise performance and 146dB CMRR.
How does the chopper + auto-zero architecture of the MAX44241AUA+ differ from standard zero-drift op amps?
The MAX44241AUA+ combines chopper stabilization (for 1/f noise elimination) and auto-zeroing (for DC offset correction) in a single monolithic BiCMOS process. Unlike pure chopper amps-which suffer from switching glitches-the hybrid method reduces residual ripple and settles faster. Unlike pure auto-zero amps-which exhibit higher broadband noise-the MAX44241AUA+ achieves 9nV/√Hz at 1kHz while maintaining 5MHz GBW and 1µs settling time.
Can the MAX44241AUA+ be used in dual-supply configurations?
Yes, the MAX44241AUA+ supports dual-supply operation from ±1.35V to ±18V. Its input common-mode range extends to (VSS – 0.05V) and (VDD – 1.5V), and its rail-to-rail output swings within 130mV of either rail at 25°C. This allows direct interfacing with bipolar sensor outputs and legacy ±15V industrial systems while maintaining full precision specifications.
What package type is used for the MAX44241AUA+ and what are its key mechanical features?
The MAX44241AUA+ uses the 8-pin µMAX (FMAX) package-pin-compatible with SO-8 but with 3mm × 3mm footprint and 0.8mm height. It features an exposed thermal pad for enhanced heat dissipation and is RoHS-compliant (lead-free). The package outline number is 21-0036, and land pattern 90-0092 applies. Its compact size supports high-density PCB layouts in space-constrained portable and modular industrial equipment.
MAX44241AUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX44241AUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX44241AUA+ 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+ reliable?
The price and inventory of MAX44241AUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX44241AUA+ is usually 5 days.
3.What payment methods are accepted for MAX44241AUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX44241AUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX44241AUA+?
MAX44241AUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX44241AUA+ 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+?
For technical support, including MAX44241AUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX44241AUA+ requirements.
6.How does Aetrix verify that MAX44241AUA+ is sourced from the original manufacturer or authorized distributors?
All MAX44241AUA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX44241AUA+?
All MAX44241AUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX44241AUA+, 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+ part is unused and in its original packaging.
Return procedure for MAX44241AUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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