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Analog Devices Inc./Maxim Integrated MAX4372FEUK-T
- Part No.:
- MAX4372FEUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4372FEUK-T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
MAX4372FEUK-T from Maxim Integrated is a precision high-side current-sense amplifier with 50V/V fixed gain, housed in a 5-pin SOT23 package. It operates from 2.7V to 28V supply, draws only 30μA quiescent current, achieves ±0.18% full-scale accuracy and 0.3mV input offset voltage, and delivers voltage output for direct ADC interfacing-ideal for battery current monitoring in portable electronics.
For engineers reviewing the MAX4372FEUK-T datasheet, MAX4372FEUK-T pinout, MAX4372FEUK-T application, or MAX4372FEUK-T equivalent, this device supports high-accuracy, low-power, high-common-mode (0–28V) current sensing without ground-path interference-critical for notebook computers, smart-battery chargers, and portable system power management.
Technical Context
The MAX4372FEUK-T implements a high-side sensing architecture using an internal current-mirror-based amplifier topology that maintains functional operation down to 0V common-mode voltage-fully independent of VCC. Its 50V/V gain is laser-trimmed at wafer level, enabling precise full-scale sense voltage of 100mV and corresponding 5.0V output at full scale.
It features rail-to-rail output capability (VOUT up to VCC − 0.25V), 1.5Ω output impedance, and stable operation with up to 1000pF capacitive load. The device achieves 200kHz −3dB bandwidth at 50V/V gain with 10pF load, and settles to 1% in 20µs for step changes in sense voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - sets full-scale output to 5.0V for 100mV sense voltage, enabling direct interface with 5V ADCs |
| Supply Voltage Range | 2.7V to 28V - supports wide-input systems including multi-cell Li-ion batteries and industrial DC rails |
| Input Common-Mode Range | 0V to 28V - remains operational during deep battery discharge (e.g., 2-cell pack at 0.1V total) |
| Full-Scale Accuracy | ±0.18% at +25°C - ensures <±1.8mV error on 100mV VSENSE, critical for battery fuel gauging |
| Supply Current | 30μA typical - enables always-on current monitoring in ultra-low-power portable devices |
| Input Offset Voltage | 0.3mV typical (EUK package) - limits minimum detectable current when paired with standard sense resistors |
| Output Impedance | 1.5Ω - drives 10kΩ+ loads with <0.015% gain error; eliminates need for output buffer in most designs |
Pinout & Package
MAX4372FEUK-T is packaged in a RoHS-compliant 5-pin SOT23 (U5+1 outline), measuring 2.9mm × 1.6mm × 1.1mm, with exposed pad not connected internally. Pin 1 is RS+, pin 2 is OUT, pin 3 is GND, pin 4 is VCC, and pin 5 is RS−. No pins are internally NC.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RS+ | High-side connection to external sense resistor; accepts 0–28V common-mode voltage |
| 2 | OUT | Voltage output proportional to sensed current (VOUT = 50 × VSENSE); drives ADC or comparator directly |
| 3 | GND | Analog ground reference; must be tied to system ground plane with low-inductance path |
| 4 | VCC | Power supply input; requires ≥0.1μF ceramic decoupling capacitor placed adjacent to pin |
| 5 | RS− | Load-side connection to sense resistor; completes differential sense path with RS+ |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 30μA supply current enables continuous current monitoring in battery-backed systems without measurable runtime impact |
| Zero-ground-interference sensing | High-side architecture preserves battery charger ground integrity-no shared return path between load and charger |
| Fixed-gain voltage output | 50V/V gain eliminates external gain-setting resistors and associated layout sensitivity or drift errors |
| Wide common-mode independence | 0–28V input range functions regardless of VCC value-supports sensing at 28V while powered from 3.3V |
| Low output impedance | 1.5Ω output resistance allows direct driving of 10kΩ ADC inputs with <0.015% loading error |
Applications
| Notebook Computer Power Monitoring | Smart-Battery Charger Feedback |
|---|---|
|
Use Scenario: Real-time battery discharge/charge current measurement in ultraportable notebooks with dual-cell Li-ion packs. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting mV-level sense voltage into scalable 0–5V analog output for system microcontroller ADC. Use Value: Enables accurate fuel gauging and thermal management by resolving sub-10mA current steps with ±0.18% full-scale accuracy-even at 0.1V pack voltage. |
Use Scenario: Precision current feedback loop in USB-C PD or proprietary smart-battery charging ICs. IC Role / Device Role / Timing Role: High-accuracy, high-common-mode current sensor providing isolated current feedback to charger controller without ground-loop coupling. Use Value: Maintains ±0.18% full-scale accuracy across 0–28V input range, ensuring charge termination within ±1% of target capacity under varying battery voltage conditions. |
| Portable Medical Device Battery Management | Industrial DC Power Rail Monitoring |
|
Use Scenario: Continuous current logging in handheld diagnostic instruments powered by replaceable Li-ion cells. IC Role / Device Role / Timing Role: Micropower (30μA) high-side amplifier delivering stable voltage output for low-power MCU ADC sampling at 10Hz–1kHz rates. Use Value: 0.3mV input offset and 20µs settling time enable reliable detection of standby vs. active current states-critical for predictive battery life estimation. |
Use Scenario: Overcurrent protection and telemetry in 24V industrial control modules with distributed power distribution. IC Role / Device Role / Timing Role: High-side current monitor interfaced to isolated sigma-delta ADC for PLC analog input modules. Use Value: 28V common-mode tolerance and 1.5Ω output drive capability allow direct connection to isolation amplifiers without signal conditioning-reducing BOM count and board area. |
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 |
|---|---|---|---|
| MAX4080FASA+ | 50V/V gain, SO-8 package, 125kHz bandwidth, 125μA supply current, ±0.5% gain error | Higher power consumption and larger footprint; better suited for non-battery-critical industrial monitoring | Select MAX4080FASA+ only if SO-8 assembly is required and 125μA supply is acceptable. |
| INA219AIDR | I²C digital output, integrated 12-bit ADC, 0.1% gain error, 26V max common-mode, 1mA supply | Requires I²C host interface and firmware integration; eliminates external ADC but increases software overhead | Choose INA219AIDR when digital bus interface and onboard calibration are prioritized over analog simplicity and micropower. |
Compared with MAX4372FEUK-T, MAX4080FASA+ trades 4× higher supply current and larger package for improved thermal stability in ambient >85°C environments, while INA219AIDR replaces analog simplicity with digital configurability at the cost of 33× higher quiescent power and added firmware dependency.
Availability
MAX4372FEUK-T is available at Aetrix Electronics and suitable for notebook computers, smart-battery chargers, and portable medical devices requiring stable component supply with guaranteed long-term sourcing and RoHS-compliant packaging.
Supply support for MAX4372FEUK-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) is a semiconductor company specializing in precision analog, mixed-signal, and high-reliability ICs for power, sensing, and communication applications.
The MAX4372 family was designed specifically for space-constrained, battery-sensitive systems requiring high-accuracy, micropower, high-side current sensing-targeting portable computing, energy storage, and portable instrumentation markets.
FAQ
What is the exact gain of MAX4372FEUK-T and how is it implemented?
The MAX4372FEUK-T has a precisely trimmed fixed gain of 50V/V, achieved via laser trimming of internal resistive elements during wafer test. This gain is factory-set and unchangeable-no external components are needed to configure or calibrate it. The 50V/V ratio means a 100mV differential sense voltage (VRS+ − VRS−) produces a 5.0V output voltage, enabling direct compatibility with 5V ADC references. Gain accuracy is ±0.25% at +25°C and ±5.5% over −40°C to +85°C.
Does MAX4372FEUK-T require external gain-setting resistors?
No, MAX4372FEUK-T does not require external gain-setting resistors. Its 50V/V gain is fully integrated and internally trimmed-eliminating resistor matching errors, temperature drift, and PCB layout sensitivity. The device outputs a voltage directly proportional to the sensed current, simplifying design and improving long-term stability. External resistors are only needed for the sense element (RSENSE) itself, which is placed externally between the power source and load.
What is the minimum common-mode voltage supported by MAX4372FEUK-T?
The MAX4372FEUK-T supports a true 0V minimum common-mode input voltage-verified functional down to 0V at RS+ and RS−, independent of VCC. This capability is essential for monitoring deeply discharged battery packs (e.g., 2-cell Li-ion at ≤0.2V total) while maintaining valid output response. The datasheet confirms functionality at VRS+ = 0.1V with only ±1% total output error, making it uniquely suited for end-of-discharge fuel gauging.
Can MAX4372FEUK-T operate from a 3.3V supply while sensing 24V currents?
Yes, MAX4372FEUK-T can operate from a 3.3V supply while accurately sensing currents at 24V common-mode voltage. Its input common-mode range (0–28V) is fully independent of VCC-meaning RS+ and RS− may sit at 24V while VCC is supplied at 3.3V. The output will swing up to VCC − 0.25V (i.e., ~3.05V), so for full 5V-scale output, VCC must be ≥5.25V. At 3.3V supply, full-scale output is ~3.05V, corresponding to 61mV VSENSE.
Is MAX4372FEUK-T pin-compatible with other MAX4372 variants like MAX4372TEUK-T or MAX4372HEUK-T?
Yes, MAX4372FEUK-T is pin-compatible with MAX4372TEUK-T (20V/V) and MAX4372HEUK-T (100V/V) in the same 5-pin SOT23 package-same pinout (RS+, OUT, GND, VCC, RS−), same footprint, and identical absolute maximum ratings. The only difference is the factory-trimmed gain; all electrical, thermal, and mechanical specifications-including supply range, accuracy, bandwidth, and temperature range-are identical across T/F/H versions.
MAX4372FEUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 200 kHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 30µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4372FEUK-T FAQ
1.How can I place an order for MAX4372FEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372FEUK-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 MAX4372FEUK-T reliable?
The price and inventory of MAX4372FEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372FEUK-T is usually 5 days.
3.What payment methods are accepted for MAX4372FEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372FEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372FEUK-T?
MAX4372FEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372FEUK-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 MAX4372FEUK-T?
For technical support, including MAX4372FEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372FEUK-T requirements.
6.How does Aetrix verify that MAX4372FEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4372FEUK-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 MAX4372FEUK-T meets industry standards.
7.What is the process for return or replacement of MAX4372FEUK-T?
All MAX4372FEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372FEUK-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 MAX4372FEUK-T part is unused and in its original packaging.
Return procedure for MAX4372FEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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