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Analog Devices Inc./Maxim Integrated MAX40201WAUA+
- Part No.:
- MAX40201WAUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX40201WAUA+.pdf
- Description:
- DUAL 0V TO76V CURRENT SENSE AMPL
- Quantity:
- Payment:
- Shipping:
Inventory:3,747
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Product details
Overview
MAX40201WAUA+ from Analog Devices is a dual-channel, high-side current-sense amplifier with 200V/V fixed gain, 0V to 76V input common-mode range, <±12µV max input offset voltage at +25°C, <0.1% max gain error at +25°C, and 80kHz small-signal bandwidth-designed for precision multichannel current monitoring in server backplanes and industrial power management systems.
For engineers reviewing the MAX40201WAUA+ datasheet, MAX40201WAUA+ pinout, MAX40201WAUA+ application, or MAX40201WAUA+ equivalent, key selection criteria include guaranteed 200V/V gain, µMAX® 8-pin package compatibility, -40°C to +125°C operation, rail-to-rail output swing capability, and validated performance at VCM = 76V with SAR ADC interfacing.
Technical Context
The MAX40201WAUA+ implements a precision differential-input, single-ended-output architecture optimized for high-voltage high-side sensing. Its BiCMOS process enables simultaneous 0V–76V common-mode rejection independent of VDD (2.7V–5.5V) and sub-12µV offset stability across temperature.
Each channel features matched internal gain-setting resistors for 200V/V amplification, with CMRR >130dB DC and AC CMRR >47dB at 200kHz. The device supports fast settling (20µs to 0.1%) and low 95nV/√Hz input voltage noise-critical for accurate low-VSENSE measurements down to 12.5mV full-scale.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200V/V fixed-enables 12.5mV full-scale sense voltage to produce 2.5V output at VDD = 3.3V, matching typical SAR ADC reference levels. |
| Input Offset Voltage (max) | ±25µV over -40°C to +125°C-ensures ≤0.2% measurement error at 12.5mV VSENSE without calibration. |
| Gain Error (max) | 0.25% over -40°C to +125°C-guarantees consistent scaling across temperature for multi-channel synchronized acquisition. |
| Input Common-Mode Range | 0V to 76V-supports direct sensing on 48V/54V telecom rails and battery inputs down to 2.7V without level-shifting circuitry. |
| Small-Signal Bandwidth | 80kHz-adequate for PWM-based motor control feedback and transient detection in power supply monitoring. |
| Supply Voltage Range | 2.7V to 5.5V-compatible with standard 3.3V and 5V logic domains while maintaining full 76V VCM capability. |
| PSRR | 110dB-rejects supply ripple and noise, preserving accuracy in noisy industrial power environments. |
Pinout & Package
The MAX40201WAUA+ is housed in an 8-pin µMAX® package (outline 21-0036), measuring 3.0mm × 3.0mm × 1.1mm with exposed pad thermal enhancement. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS1+) | Channel 1 sense resistor high-side terminal | Connects directly to power rail side of RSENSE1; withstands up to +80V absolute max relative to GND. |
| 2 (RS1-) | Channel 1 sense resistor low-side terminal | Connects to load side of RSENSE1; forms differential input pair with RS1+ for VSENSE1 amplification. |
| 3 (RS2+) | Channel 2 sense resistor high-side terminal | Independent high-side input for second current path; electrically isolated from Channel 1 inputs. |
| 4 (RS2-) | Channel 2 sense resistor low-side terminal | Completes differential pair for VSENSE2; enables simultaneous dual-rail monitoring without shared ground errors. |
| 5 (GND) | Analog and power ground reference | Single ground connection for both channels and supply return; requires low-impedance Kelvin routing to minimize offset drift. |
| 6 (OUT1) | Channel 1 amplified output | Voltage output swinging within 15mV of GND and 15mV of VDD; drives 500µA load with <0.1Ω output resistance. |
| 7 (OUT2) | Channel 2 amplified output | Independent output with identical rail-to-rail swing and drive strength as OUT1-supports true dual-channel data acquisition. |
| 8 (VDD) | Positive supply input | Accepts 2.7V–5.5V; powers both channels and internal biasing; requires local 0.1µF NP0/C0G bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-side channels | Enables concurrent monitoring of two separate power rails (e.g., CPU core and memory VRMs) without shared ground-path interference. |
| 200V/V fixed gain | Optimized for 12.5mV full-scale sense voltage-minimizes I²R loss in shunt resistors while delivering 2.5V output at 3.3V supply for direct ADC interface. |
| 0V to 76V input common-mode range | Operates with VCM exceeding VDD (e.g., 48V rail with 3.3V supply), eliminating need for external level shifters or isolated supplies. |
| Sub-12µV input offset (max @ +25°C) | Reduces minimum detectable current by >2× versus typical 50µV amplifiers-critical for low-power standby current measurement. |
| 80kHz bandwidth with 20µs 0.1% settling | Supports real-time response to load transients in server power delivery networks and telecom rectifier modules. |
Applications
| Server Backplane Monitoring | Industrial Motor Drive Feedback |
|---|---|
Use Scenario: Real-time current monitoring of multiple 48V distribution rails feeding CPU, GPU, and memory VRMs in hyperscale data center servers. IC Role / Device Role / Timing Role: Dual-channel high-side current-sense amplifier providing isolated, rail-to-rail analog outputs synchronized to system clock for multiplexed ADC sampling. Use Value: Enables precise per-rail power budgeting and fault detection at ±0.25% total error (gain + offset), reducing thermal derating margins by 15%. |
Use Scenario: Closed-loop phase current sensing in three-phase BLDC motor drives operating from 40–75V DC bus. IC Role / Device Role / Timing Role: High-bandwidth (80kHz) current amplifier feeding dual-channel SAR ADC for field-oriented control (FOC) algorithm execution. Use Value: Delivers 20µs 0.1% settling time and <95nV/√Hz noise-supporting 16-bit effective resolution at 100ksps sampling rates. |
| Telecom Base Station PA Bias Control | Industrial PLC Power Module Protection |
Use Scenario: Monitoring bias current of GaN RF power amplifiers operating at 50V–60V drain voltage in 5G macro base stations. IC Role / Device Role / Timing Role: High-voltage common-mode amplifier interfacing with precision DAC-controlled bias loops to maintain PA linearity and efficiency. Use Value: 76V VCM rating and ±25µV offset over temperature ensure <0.5% gain drift across -40°C to +125°C ambient, extending PA calibration intervals. |
Use Scenario: Overcurrent protection and energy metering in DIN-rail mounted programmable logic controller (PLC) power modules supplying 24V/48V I/O circuits. IC Role / Device Role / Timing Role: Dual-channel current sensor feeding safety-certified microcontroller ADC inputs for SIL2-compliant trip logic and consumption logging. Use Value: Independent channel isolation prevents fault propagation between redundant power paths; 0.1% gain error meets IEC 61000-4-30 Class A accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDGKRQ1 | Single-channel, 80V VCM, 20V/V gain, higher 120kHz bandwidth but 25µV max VOS at +25°C | Requires two devices for dual-channel use; lacks integrated 200V/V gain option for 12.5mV VSENSE | Select when higher bandwidth or AEC-Q100 qualification is required; not drop-in for dual-channel space-constrained designs. |
| MAX40016ATA+ | Dual-channel, 65V VCM, 100V/V gain, 10µV max VOS at +25°C but only 20kHz bandwidth | Lower VCM limit excludes 76V telecom applications; slower response unsuitable for PWM edge detection | Prefer for cost-sensitive industrial controls where 65V VCM suffices and bandwidth demand is <25kHz. |
Compared with INA240A1QDGKRQ1 and MAX40016ATA+, the MAX40201WAUA+ uniquely delivers dual-channel 200V/V gain in a single µMAX package with 76V VCM and 80kHz bandwidth-enabling compact, high-accuracy 48V/54V system monitoring without gain-switching or layout duplication.
Availability
MAX40201WAUA+ is available at Aetrix Electronics and suitable for server backplane monitoring, industrial motor drive feedback, and telecom base station PA bias control requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX40201WAUA+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX40201WAUA+ belongs to Analog Devices' precision current-sense amplifier product line, engineered specifically for high-voltage, high-accuracy power system monitoring in data center, telecom, and factory automation infrastructure.
FAQ
What is the maximum input common-mode voltage supported by the MAX40201WAUA+?
The MAX40201WAUA+ supports an input common-mode voltage range of 0V to 76V, verified across its full operating temperature range (-40°C to +125°C). This allows direct sensing on 48V, 54V, and 72V power rails without external level-shifting circuitry. Absolute maximum ratings permit RS+/RS- pins to tolerate up to +80V relative to GND, with ±30V differential input limit.
Does the MAX40201WAUA+ require external gain-setting resistors?
No, the MAX40201WAUA+ integrates precision laser-trimmed resistors to deliver a fixed 200V/V gain-no external components are needed to set gain. This eliminates resistor matching errors and board space typically required by programmable-gain current-sense amplifiers. The gain is factory-trimmed and specified at ±0.1% max error at +25°C.
What package type and dimensions does the MAX40201WAUA+ use?
The MAX40201WAUA+ uses the 8-pin µMAX® package (outline 21-0036), measuring 3.0mm × 3.0mm × 1.1mm with an exposed thermal pad. It is distinct from the WLP variant (e.g., MAX40201WAWA+) and features industry-standard pinout compatible with existing µMAX footprint layouts. The package is RoHS-compliant and rated for reflow soldering at +260°C.
How does the MAX40201WAUA+ handle power-up sequencing?
The MAX40201WAUA+ features a high-impedance output state during power-up, preventing false triggering or bus contention. Output pins (OUT1/OUT2) remain in high-Z until internal biasing stabilizes, with a typical power-up time of 500µs. This behavior is documented in the datasheet Note 4 and ensures safe integration into systems with asynchronous supply ramping.
Can the MAX40201WAUA+ interface directly with a 16-bit SAR ADC?
Yes, the MAX40201WAUA+ is explicitly designed for SAR ADC interfacing: its 80kHz bandwidth, 20µs 0.1% settling time, rail-to-rail output swing (within 15mV of VDD/GND), and low 95nV/√Hz input voltage noise enable 16-bit effective resolution at sampling rates up to 100ksps. The 200V/V gain maps 12.5mV full-scale VSENSE to 2.5V output at VDD = 3.3V-matching common ADC reference voltages.
MAX40201WAUA+ 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:
- Current Sense
- Number of Circuits:
- 2
- Output Type:
- Single-Ended
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 80 kHz
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 500 nV
- Current - Supply:
- 1.3mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX40201WAUA+ FAQ
1.How can I place an order for MAX40201WAUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40201WAUA+ 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 MAX40201WAUA+ reliable?
The price and inventory of MAX40201WAUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40201WAUA+ is usually 5 days.
3.What payment methods are accepted for MAX40201WAUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40201WAUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40201WAUA+?
MAX40201WAUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40201WAUA+ 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 MAX40201WAUA+?
For technical support, including MAX40201WAUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40201WAUA+ requirements.
6.How does Aetrix verify that MAX40201WAUA+ is sourced from the original manufacturer or authorized distributors?
All MAX40201WAUA+ 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 MAX40201WAUA+ meets industry standards.
7.What is the process for return or replacement of MAX40201WAUA+?
All MAX40201WAUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX40201WAUA+, 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 MAX40201WAUA+ part is unused and in its original packaging.
Return procedure for MAX40201WAUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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