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Analog Devices Inc./Maxim Integrated MAX4372HESA
- Part No.:
- MAX4372HESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4372HESA.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
MAX4372HESA 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 quiescent current. It delivers 0.18% full-scale accuracy, 0.3mV input offset voltage, and supports 0–28V input common-mode range independent of supply voltage - ideal for battery current monitoring in notebook computers and smart-battery chargers.
For engineers reviewing the MAX4372HESA datasheet, MAX4372HESA pinout, MAX4372HESA application, or MAX4372HESA equivalent, this device enables compact, micropower, high-accuracy current sensing without external gain resistors - critical for space-constrained, low-power portable systems requiring stable ground-path integrity during charging.
Technical Context
The MAX4372HESA uses a proprietary current-mirror-based architecture to convert differential sense voltage (VRS+ – VRS−) into a proportional voltage output, eliminating need for external gain-setting components. Its input common-mode range extends from 0V to 28V regardless of VCC, enabling reliable operation even with deeply discharged 2-cell Li-ion batteries (≈0.8V/cell).
It features internal clamping limiting output voltage to ≤12V, 1.5Ω output impedance for robust drive capability, and 110kHz −3dB bandwidth at 100V/V gain. Power-up time is 0.5ms, and saturation recovery time is 0.1ms - supporting fast transient response in dynamic load monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output = 10V for 100mV sense voltage, enabling high-resolution low-current measurement with minimal RSENSE power loss. |
| Supply Voltage Range | 2.7V to 28V - supports single-supply operation across wide battery chemistries (Li-ion, Li-Po, NiMH) and industrial DC rails without level-shifting. |
| Input Common-Mode Range | 0V to 28V, supply-independent - ensures valid sensing down to battery deep-discharge (e.g., 0.8V total), preserving ground-path integrity for charger ICs. |
| Full-Scale Accuracy | ±0.18% at +25°C - guarantees <±1.8mV error on 100mV sense signal, critical for battery fuel-gauge calibration and overcurrent protection thresholds. |
| Input Offset Voltage | ±0.8mV max at +25°C - limits worst-case error to ±80μV at 100V/V gain, directly constraining minimum resolvable current with given RSENSE. |
| Supply Current | 30μA typical - enables always-on current monitoring in battery-backed systems with negligible impact on standby runtime. |
| −3dB Bandwidth | 110kHz at 100V/V gain - supports real-time monitoring of pulsed loads (e.g., RF power amplifiers, motor drivers) without phase lag distortion. |
Pinout & Package
MAX4372HESA is housed in an 8-pin SO (Small Outline) package with exposed pad (package code S8+2, outline 21-0041), RoHS-compliant and lead-free.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RS− | Load-side terminal of external sense resistor; referenced to GND - defines current direction sensing polarity. |
| 2 | N.C. | No internal connection; must be left floating or tied to GND per layout best practice - no functional role. |
| 3 | OUT | Voltage output proportional to sensed current (VOUT = 100 × (VRS+ − VRS−)); drives ADC input or comparator with 1.5Ω source impedance. |
| 4 | GND | Analog ground reference for internal circuitry and output stage - requires low-impedance connection to system AGND plane. |
| 5 | N.C. | No internal connection; must be left floating or tied to GND - no routing or bypass required. |
| 6 | N.C. | No internal connection; must be left floating or tied to GND - maintains package symmetry and thermal performance. |
| 7 | RS+ | Power-rail side terminal of external sense resistor; connects to battery/anode or DC bus - withstands up to +30V absolute max. |
| 8 | VCC | Positive supply input (2.7V–28V); requires ≥0.1μF ceramic decoupling capacitor placed within 2mm of pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100V/V gain | Eliminates external gain resistors and associated layout sensitivity, reducing BOM count and PCB area by >30% vs. op-amp-based solutions. |
| 0.18% full-scale accuracy | Enables ±0.2% SOC estimation in smart-battery packs without factory calibration, meeting JEITA battery management requirements. |
| 0–28V supply-independent common-mode range | Allows direct placement between battery and load without level shifters - preserves ground-referenced charger control loop integrity. |
| 30μA supply current | Supports continuous current logging in IoT edge nodes with coin-cell backup (e.g., CR2032 lifetime >5 years at 1Hz sampling). |
| 1.5Ω output impedance | Drives 10kΩ ADC inputs with <0.015% loading error and tolerates 1000pF capacitive load without oscillation - simplifies anti-aliasing filter design. |
Applications
| Notebook Computer Battery Monitoring | Smart-Battery Pack Fuel Gauging |
|---|---|
|
Use Scenario: Real-time discharge/charge current tracking in ultrabook platforms with dual-cell Li-ion batteries. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting mV-level sense voltage into 0–10V analog output for system microcontroller ADC. Use Value: Enables accurate coulomb counting with <±0.5% accumulated charge error over full battery cycle, extending runtime prediction fidelity. |
Use Scenario: Embedded fuel gauge in removable smart-battery modules compliant with SMBus v1.1. IC Role / Device Role / Timing Role: Precision current transducer feeding data to integrated battery management IC (e.g., MAX17048) via analog interface. Use Value: Provides sub-10mA resolution at 10A full scale (RSENSE = 10mΩ), satisfying SMBus battery spec requirement for ±1% current reporting accuracy. |
| Portable Medical Device Load Diagnostics | Industrial DC Power Rail Monitoring |
|
Use Scenario: Overcurrent detection and load profiling in handheld ultrasound scanners powered by 14.8V Li-ion packs. IC Role / Device Role / Timing Role: High-bandwidth (110kHz) current sensor feeding fast-response protection logic and power optimization firmware. Use Value: Detects 500mA short-circuit events within 9μs (1% settling), triggering shutdown before thermal damage to piezoelectric transducers. |
Use Scenario: Continuous current supervision on 24V industrial PLC I/O power rail with remote telemetry. IC Role / Device Role / Timing Role: Robust high-side monitor interfaced to isolated sigma-delta ADC for cloud-connected energy analytics. Use Value: Maintains ±0.3% linearity across −40°C to +85°C ambient, enabling predictive maintenance based on load drift trends without field recalibration. |
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 |
|---|---|---|---|
| MAX4372TESA+ | 20V/V gain, same 8-pin SO package, identical pinout and supply specs - lower gain reduces output swing but improves noise immunity at high currents. | Better suited for 5–50A ranges where 100mV sense voltage yields excessive VOUT; requires larger RSENSE for same resolution. | Select MAX4372TESA+ when full-scale current exceeds 1A and board space allows higher RSENSE power dissipation. |
| INA219AIDR | I²C digital output, integrated 12-bit ADC and multiplier, 26V max common-mode, 0.1% gain error - adds processing overhead but eliminates external ADC. | Requires microcontroller I²C stack and firmware integration; lacks analog output for direct comparator use or legacy analog interfaces. | Choose INA219AIDR for new designs needing digital telemetry and multi-parameter monitoring (voltage + current + power), not analog-only systems. |
Compared with MAX4372TESA+ and INA219AIDR, the MAX4372HESA provides highest analog resolution (100V/V) in a drop-in SO package for legacy analog signal chains, while offering superior common-mode range and lower quiescent current than the INA219 - making it optimal for cost-sensitive, low-power, high-accuracy analog current feedback loops.
Availability
MAX4372HESA is available at Aetrix Electronics and suitable for notebook computer battery management, smart-battery pack fuel gauging, and portable medical device load diagnostics requiring stable component supply and long-term lifecycle support.
Supply support for MAX4372HESA 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 power-management ICs for industrial, computing, and portable applications.
The MAX4372 family was designed specifically for micropower, high-accuracy, high-side current sensing in battery-powered systems - prioritizing supply independence, low offset, and minimal footprint across SOT23, SO, and UCSP packages.
FAQ
What is the maximum common-mode voltage the MAX4372HESA can measure?
The MAX4372HESA supports a 0V to 28V input common-mode range that is fully independent of its supply voltage (2.7V to 28V). This means it can accurately sense current even when the RS+ pin is at 0.5V - such as during deep discharge of a 2-cell Li-ion battery - without losing functionality or introducing ground-loop errors. Absolute maximum rating for RS+/RS− is +30V relative to GND.
Does the MAX4372HESA require external gain-setting resistors?
No, the MAX4372HESA does not require external gain-setting resistors. It integrates a fixed 100V/V gain amplifier internally, delivering a voltage output directly proportional to the sense voltage (VRS+ − VRS−). This eliminates resistor matching errors, layout sensitivity, and board space typically needed for discrete op-amp current-sense circuits - simplifying design and improving long-term stability.
What is the full-scale accuracy specification for the MAX4372HESA?
The MAX4372HESA guarantees ±0.18% full-scale accuracy at +25°C, measured at VSENSE = 100mV, VCC = 12V, and VRS+ = 12V. Over the full temperature range (−40°C to +85°C), full-scale accuracy degrades to ±3%, ensuring predictable error bounds for battery fuel-gauge and overcurrent protection algorithms without requiring per-unit calibration.
Can the MAX4372HESA be used with a 3.3V supply?
Yes, the MAX4372HESA operates reliably from 2.7V to 28V supply, including standard 3.3V logic rails. At VCC = 3.3V, its output voltage is clamped to ≤12V but remains functional up to VOUT ≈ VCC − 0.25V (i.e., ~3.05V), which is sufficient for driving 3.3V ADCs. The 30μA supply current ensures minimal impact on low-voltage system power budgets.
What package type is used for the MAX4372HESA?
The MAX4372HESA uses an 8-pin SO (Small Outline) package with exposed pad (RoHS-compliant, package code S8+2, outline 21-0041). Unlike the SOT23-5 variants, this SO package provides enhanced thermal performance and higher pin count for improved layout flexibility - particularly beneficial in high-reliability industrial and medical applications where solder joint integrity and thermal margin are critical.
MAX4372HESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 110 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:
- 8-SOIC
MAX4372HESA FAQ
1.How can I place an order for MAX4372HESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372HESA 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 MAX4372HESA reliable?
The price and inventory of MAX4372HESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372HESA is usually 5 days.
3.What payment methods are accepted for MAX4372HESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372HESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372HESA?
MAX4372HESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372HESA 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 MAX4372HESA?
For technical support, including MAX4372HESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372HESA requirements.
6.How does Aetrix verify that MAX4372HESA is sourced from the original manufacturer or authorized distributors?
All MAX4372HESA 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 MAX4372HESA meets industry standards.
7.What is the process for return or replacement of MAX4372HESA?
All MAX4372HESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372HESA, 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 MAX4372HESA part is unused and in its original packaging.
Return procedure for MAX4372HESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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