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Analog Devices Inc./Maxim Integrated MAX4372HEUK
- Part No.:
- MAX4372HEUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4372HEUK.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,842
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Product details
Overview
MAX4372HEUK from Maxim Integrated is a precision high-side current-sense amplifier with 100V/V fixed gain, operating from 2.7V to 28V supply and consuming only 30µA. It features 0.18% full-scale accuracy, 0.3mV input offset voltage, and a wide 0–28V input common-mode range independent of supply voltage-enabling accurate battery discharge monitoring in notebook computers and smart battery chargers.
For engineers reviewing the MAX4372HEUK datasheet, MAX4372HEUK pinout, MAX4372HEUK application, or MAX4372HEUK equivalent, this device delivers verified high-side sensing capability without ground-path interference, supports compact SOT23-5 layout, and enables precise current-to-voltage conversion for low-power portable systems requiring stable full-scale output at 100mV sense voltage.
Technical Context
The MAX4372HEUK implements a BiCMOS-based current-mirror architecture that converts differential sense voltage (VRS+ – VRS−) into a proportional voltage output without external gain-setting resistors. Its input stage operates with rail-to-rail common-mode input (0–28V), decoupled from VCC, ensuring functionality even during deep battery discharge (e.g., 2-cell Li-ion at ≤2.4V).
Internal gain is fixed at 100V/V, delivering 10V full-scale output for 100mV sense voltage. Output impedance is 1.5Ω, enabling direct drive of ADC inputs or filtering networks. Saturation recovery time is 0.1ms, and power-up settling to 1% occurs within 0.5ms-supporting fast transient detection in battery protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - delivers 10V output for 100mV sense voltage, eliminating need for external gain resistors |
| Supply Current | 30µA - enables multi-year operation on coin-cell or backup batteries in always-on monitoring |
| Input Offset Voltage | ±0.3mV - limits error to ≤0.3% at 100mV full-scale, critical for low-current (<100mA) sensing |
| Common-Mode Range | 0V to 28V, independent of VCC - supports sensing across fully discharged 2-cell Li-ion (≤2.4V) while VCC = 2.7V |
| Full-Scale Accuracy | ±0.18% - guarantees calibrated current measurement without system-level trimming |
| Output Impedance | 1.5Ω - allows direct connection to 10kΩ ADC input without buffer, minimizing BOM count |
| Bandwidth | 110kHz (−3dB) - sufficient for overcurrent fault detection and charge/discharge rate tracking |
Pinout & Package
MAX4372HEUK is housed in a space-saving 5-pin SOT23 package (JEDEC MO-178AA), footprint-compatible with standard pick-and-place equipment and offering thermal resistance θJA = 140°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Sense resistor load-side terminal | Connects to low side of external sense resistor; referenced to GND, not VCC |
| 2 (OUT) | Voltage output | Delivers 100×(VRS+ − VRS−) with 1.5Ω source impedance; clamped to ≤12V |
| 3 (GND) | Analog ground reference | Return path for internal bias currents; must be tied to system power ground near sense resistor |
| 4 (VCC) | Positive supply | Accepts 2.7V–28V; requires ≥0.1µF local ceramic decoupling capacitor |
| 5 (RS+) | Sense resistor battery/system-side terminal | Connects to high side of sense resistor; supports up to 28V common-mode voltage |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 30µA supply current enables integration into ultra-low-power battery monitors without compromising runtime |
| High-side sensing architecture | Eliminates ground-path disturbance-critical for battery charger ICs and fuel-gauge systems where GND integrity is mandatory |
| Supply-independent common-mode range | 0–28V input range functions even when VCC = 2.7V, supporting deep-discharge battery monitoring down to 1.2V/cell |
| Fixed 100V/V gain | Removes external resistor tolerance errors and PCB layout sensitivity, improving production yield in high-volume portable designs |
| Low output impedance | 1.5Ω drive strength permits direct interface to SAR ADCs or RC filters without op-amp buffering, reducing component count |
Applications
| Notebook Battery Monitoring | Smart Battery Charger Interface |
|---|---|
|
Use Scenario: Real-time discharge current tracking in ultrabooks with dual-cell Li-ion packs operating down to 2.5V total. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting mΩ-sense voltage into scalable analog output for fuel-gauge MCU ADC. Use Value: Enables accurate state-of-charge estimation during deep discharge without interrupting charger ground return path. |
Use Scenario: Bidirectional current monitoring in USB-C PD chargers managing 5–20V input and battery charge/discharge cycles. IC Role / Device Role / Timing Role: Precision current transducer feeding safety controller with 110kHz bandwidth for overcurrent shutdown response. Use Value: Supports ±1% current accuracy across 0–28V input range, allowing single-component solution for both charge and discharge legs. |
| Portable Medical Device Power Management | IoT Asset Tracker Battery Health Diagnostics |
|
Use Scenario: Continuous load-current profiling in handheld ECG monitors powered by CR2032 coin cells and rechargeable LiPo backups. IC Role / Device Role / Timing Role: Micropower current sensor supplying telemetry data to low-power BLE SoC during sleep/wake cycles. Use Value: 30µA quiescent current extends coin-cell life beyond 12 months while maintaining 0.18% full-scale accuracy. |
Use Scenario: Long-term battery degradation analysis in GPS-enabled asset trackers deployed for >5 years in remote locations. IC Role / Device Role / Timing Role: High-stability current monitor logging discharge profiles under varying temperature (−40°C to +85°C). Use Value: Guaranteed ±0.18% accuracy and 0.3mV offset ensure reliable capacity fade detection across industrial temperature range. |
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 |
|---|---|---|---|
| MAX4080TASA | 20V/V gain, SO-8 package, 75µA supply current, 0.5mV offset | Larger footprint; higher power; lower gain limits resolution for sub-100mA sensing | Select when SO-8 layout reuse is required and 20V/V gain matches existing RSENSE network |
| INA219AIDR | I²C digital output, integrated 12-bit ADC, 1% gain error, 260µA supply | Requires microcontroller I²C interface; no analog output; higher quiescent current | Choose when digital bus integration and onboard calibration outweigh need for analog simplicity and micropower operation |
Compared with MAX4372HEUK, MAX4080TASA offers SO-8 compatibility but doubles supply current and halves gain resolution; INA219AIDR adds digital intelligence at the cost of 8.7× higher quiescent draw and loss of direct analog interfacing-making MAX4372HEUK optimal for compact, ultra-low-power analog current monitoring.
Availability
MAX4372HEUK is available at Aetrix Electronics and suitable for notebook battery management, smart charger feedback loops, and portable medical device power telemetry requiring stable component supply, long-lifecycle availability, and guaranteed -40°C to +85°C operation.
Supply support for MAX4372HEUK 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and portable applications.
The MAX4372HEUK belongs to Maxim's high-side current-sense amplifier product line, designed specifically for battery-powered systems requiring precision, micropower operation, and immunity to ground-path disruption in charging and fuel-gauge architectures.
FAQ
What is the exact gain value and tolerance of the MAX4372HEUK?
The MAX4372HEUK has a fixed voltage gain of 100V/V, with a typical gain accuracy of ±5.5% over temperature and supply voltage. This is confirmed in the Electrical Characteristics table under "Gain Accuracy" for the H version, and applies specifically to the MAX4372HEUK variant in SOT23-5 packaging.
Does the MAX4372HEUK require external gain-setting resistors?
No, the MAX4372HEUK does not require external gain-setting resistors. Its 100V/V gain is internally fixed via laser-trimmed resistor ratios in the BiCMOS process, as stated in the General Description and Pin Description sections of the datasheet-enabling simplified PCB layout and improved production consistency.
Can the MAX4372HEUK operate with a 2.5V supply voltage?
No, the MAX4372HEUK requires a minimum supply voltage of 2.7V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.7V is not guaranteed and may result in degraded accuracy or failure to power up-this limit applies strictly to the MAX4372HEUK and all T/F/H variants.
What is the maximum common-mode voltage the MAX4372HEUK can tolerate on RS+?
The MAX4372HEUK supports a maximum input common-mode voltage of +28V on the RS+ pin, independent of VCC. This is explicitly guaranteed in the Electrical Characteristics table under "Common-Mode Input Range (VCMR)" and validated across the full −40°C to +85°C temperature range for the MAX4372HEUK.
Is the MAX4372HEUK pin-compatible with other MAX4372 variants like MAX4372TEUK?
Yes, the MAX4372HEUK is pin-compatible with MAX4372TEUK and MAX4372FEUK in the SOT23-5 package-same pinout (RS−, OUT, GND, VCC, RS+), same footprint, and identical thermal and layout requirements. Only the gain (100V/V vs. 20V/V or 50V/V) differs between these variants.
MAX4372HEUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 275 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
MAX4372HEUK FAQ
1.How can I place an order for MAX4372HEUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372HEUK 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 MAX4372HEUK reliable?
The price and inventory of MAX4372HEUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372HEUK is usually 5 days.
3.What payment methods are accepted for MAX4372HEUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372HEUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372HEUK?
MAX4372HEUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372HEUK 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 MAX4372HEUK?
For technical support, including MAX4372HEUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372HEUK requirements.
6.How does Aetrix verify that MAX4372HEUK is sourced from the original manufacturer or authorized distributors?
All MAX4372HEUK 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 MAX4372HEUK meets industry standards.
7.What is the process for return or replacement of MAX4372HEUK?
All MAX4372HEUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372HEUK, 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 MAX4372HEUK part is unused and in its original packaging.
Return procedure for MAX4372HEUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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