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Analog Devices Inc./Maxim Integrated MAX44246AUA+
- Part No.:
- MAX44246AUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX44246AUA+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,240
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Product details
Overview
MAX44246AUA+ from Maxim Integrated is a 36V, dual-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 single supply. It is used in high-accuracy load cell amplifiers and precision ADC front-ends.
For engineers reviewing the MAX44246AUA+ datasheet, MAX44246AUA+ pinout, MAX44246AUA+ application, or MAX44246AUA+ equivalent, key selection criteria include guaranteed -40°C to +125°C operation, 8-pin µMAX package compatibility, dual-channel layout for differential signal conditioning, and EMI-filtered inputs for industrial sensor interfaces.
Technical Context
The MAX44246AUA+ implements a patented dual-stage correction architecture combining chopper stabilization (for 1/f noise cancellation) and auto-zeroing (for DC offset and drift suppression), enabling near-zero long-term drift without sacrificing bandwidth. Its input stage includes integrated passive EMI filtering to suppress RF interference above 10MHz.
It supports rail-to-rail output swing with 3.8V/µs slew rate and 5MHz gain-bandwidth product, while maintaining 1µs settling time to 0.01% for 2V steps-critical for high-resolution delta-sigma ADC buffering in precision measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 5µV (max) - enables sub-16-bit error budget 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-noise transducer amplification with minimal SNR degradation |
| Gain-Bandwidth Product | 5MHz - allows stable unity-gain buffer configuration up to ~3MHz signal bandwidth |
| Supply Range | 2.7V to 36V single supply - accommodates industrial 24V rails and battery-powered 3.3V systems |
| Settling Time | 1µs to 0.01% - meets timing requirements for fast-sampling 18-bit+ delta-sigma converters |
| EMI Rejection | Integrated input filter - suppresses >60dB of RF interference at 100–1000MHz per EMIRR test data |
Pinout & Package
The MAX44246AUA+ is housed in an 8-pin µMAX package (package code U8+1), RoHS-compliant, with exposed pad for thermal enhancement and footprint compatible with SO-8 land pattern 90-0092.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUTA | Channel A output | Rail-to-rail capable, drives 5kΩ load to within 130mV of rails at +25°C |
| 2 INA− | Channel A inverting input | Differential pair input node; matched to INA+ for CMRR >140dB |
| 3 INA+ | Channel A noninverting input | Low-bias-current (600pA typ) node; EMI-filtered per internal schematic |
| 4 VSS | Negative supply | Ground reference for single-supply operation; tied to PCB ground plane |
| 5 VDD | Positive supply | Accepts 2.7V–36V; PSRR >146dB across full voltage and temperature range |
| 6 INB+ | Channel B noninverting input | Independent high-impedance input; identical specs to INA+ |
| 7 INB− | Channel B inverting input | Matched to INB+; supports fully differential gain configurations |
| 8 OUTB | Channel B output | Electrically isolated from OUTA; crosstalk <−120dB at 1kHz |
Key Features
| Feature | Design Value |
|---|---|
| Chopper + Auto-Zero Hybrid Architecture | Eliminates 1/f noise and drift simultaneously-enables true DC-coupled precision without external calibration |
| Integrated EMI Filter | Passive RC network on each input-reduces RF-induced output errors without external components |
| Rail-to-Rail Output Stage | Swings within 130mV of VDD and VSS at full load-maximizes dynamic range in single-supply systems |
| Wide Supply Range | Operates from 2.7V to 36V-supports both low-voltage portable and high-voltage industrial front-ends |
| Low Quiescent Current | 0.42mA per channel (typ)-enables always-on precision sensing in battery-constrained applications |
Applications
| Battery-Powered Equipment | PLC Analog I/O Modules |
|---|---|
Use Scenario: Portable multimeter or handheld calibration tool requiring microvolt-level accuracy over temperature and battery life. IC Role / Device Role / Timing Role: Dual-channel precision buffer and gain stage for high-impedance voltage/divider inputs feeding 24-bit SAR or delta-sigma ADCs. Use Value: 5µV max VOS and 20nV/°C drift eliminate need for periodic zero-calibration, extending field service intervals. | Use Scenario: Industrial programmable logic controller with 4–20mA loop-powered analog input cards. IC Role / Device Role / Timing Role: Low-side current sense amplifier and sensor signal conditioner for RTD/thermocouple front-end stages. Use Value: Rail-to-rail output and 36V supply tolerance allow direct interface with 24V PLC backplane without level-shifting. |
| Transducer Amplifiers | Load Cell Amplifiers |
Use Scenario: High-accuracy pressure transducer in medical ventilator or aerospace sensor system. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with fixed-gain configuration driving anti-aliasing filter. Use Value: 9nV/√Hz noise density preserves SNR of mV-level bridge outputs; EMI filter rejects switching noise from nearby motor drives. | Use Scenario: Weigh scale platform with 1–5mV/V full-scale load cell output. IC Role / Device Role / Timing Role: Dual-op-amp difference amplifier with matched resistor network for ratiometric excitation and output scaling. Use Value: Dual-channel topology enables fully differential signal path-rejects common-mode noise and improves PSRR by >10dB vs. single-channel solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift, 5.7nV/√Hz noise, 2MHz GBW, SO-8 package | Lower noise but reduced bandwidth; not rated for >105°C ambient | Preferred for ultra-low-noise DC-coupled systems below 85°C ambient |
| AD8629ARZ | Auto-zero, 13nV/√Hz noise, 2.5MHz GBW, SO-8 package | Higher noise, lower PSRR (120dB), no integrated EMI filter | Suitable where cost sensitivity outweighs EMI robustness and drift performance |
Compared with OPA2189IDR and AD8629ARZ, the MAX44246AUA+ uniquely combines 36V operation, −40°C to +125°C rating, integrated EMI filtering, and 5µV/20nV/°C drift-making it the only option qualified for harsh-environment industrial weigh scales and PLC analog modules.
Availability
MAX44246AUA+ 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 MAX44246AUA+ 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 markets.
The MAX44246AUA+ belongs to Maxim's ultra-precision op amp family engineered specifically for DC-critical applications such as strain gauge, load cell, and high-resolution ADC front-ends where offset, drift, and noise must be minimized without calibration.
FAQ
What is the maximum operating temperature range for the MAX44246AUA+?
The MAX44246AUA+ is specified and tested over the industrial temperature range of −40°C to +125°C. This rating is guaranteed per the datasheet's Electrical Characteristics table and supported by thermal design using its 206.3°C/W junction-to-ambient thermal resistance in the µMAX package. The MAX44246AUA+ maintains all key parameters-including 5µV max VOS and 9nV/√Hz noise-within this full range.
Does the MAX44246AUA+ require external components for EMI suppression?
No, the MAX44246AUA+ integrates passive EMI filtering on both inputs, as confirmed in the Applications Information section and EMIRR vs. Frequency plot (toc30). This eliminates the need for external RC filters in most industrial environments. External filtering may still be considered for extreme RF fields (>10V/m), but the MAX44246AUA+'s built-in filter provides >60dB rejection at 100–1000MHz per test data.
Can the MAX44246AUA+ drive a 10kΩ load rail-to-rail?
Yes-the MAX44246AUA+ delivers rail-to-rail output swing into loads ≥5kΩ, as specified in the Electrical Characteristics table (VOL ≤180mV, VOH ≥VDD−0.25V at full temperature range). At 10kΩ, output swing improves further: VOH reaches VDD−0.05V and VOL drops to 30mV at +25°C, ensuring >98% of full-scale range utilization for 24-bit ADC interfacing.
Is the MAX44246AUA+ pin-compatible with other devices in the MAX4424x family?
Yes-the MAX44246AUA+ shares identical 8-pin µMAX pinout with MAX44241AUA+, as verified in the Pin Configurations and Pin Descriptions sections. Both feature OUTA/INA−/INA+/VSS/VDD/INB+/INB−/OUTB on pins 1–8. This allows drop-in replacement between single (MAX44241) and dual (MAX44246) variants when board space permits dual-channel use.
What is the typical quiescent current per channel for the MAX44246AUA+ at 30V supply?
The typical quiescent current per channel for the MAX44246AUA+ is 0.42mA at TA = +25°C and VDD = 30V, as stated in the Electrical Characteristics table under "Quiescent Current per Amplifier." Maximum current is 0.55mA at +25°C and rises to 0.60mA across −40°C to +125°C-making the MAX44246AUA+ suitable for always-on precision monitoring with sub-1mW per channel power consumption.
MAX44246AUA+ 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:
- 2
- 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 (x2 Channels)
- 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
MAX44246AUA+ FAQ
1.How can I place an order for MAX44246AUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX44246AUA+ 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 MAX44246AUA+ reliable?
The price and inventory of MAX44246AUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX44246AUA+ is usually 5 days.
3.What payment methods are accepted for MAX44246AUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX44246AUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX44246AUA+?
MAX44246AUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX44246AUA+ 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 MAX44246AUA+?
For technical support, including MAX44246AUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX44246AUA+ requirements.
6.How does Aetrix verify that MAX44246AUA+ is sourced from the original manufacturer or authorized distributors?
All MAX44246AUA+ 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 MAX44246AUA+ meets industry standards.
7.What is the process for return or replacement of MAX44246AUA+?
All MAX44246AUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX44246AUA+, 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 MAX44246AUA+ part is unused and in its original packaging.
Return procedure for MAX44246AUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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