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Analog Devices Inc./Maxim Integrated MAX4372FESA
- Part No.:
- MAX4372FESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4372FESA.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,538
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Product details
Overview
MAX4372FESA from Maxim Integrated is a precision high-side current-sense amplifier with fixed 50V/V gain, operating from 2.7V to 28V supply and consuming only 30μA. It delivers 0.18% full-scale accuracy, 0.3mV input offset voltage, and low 1.5Ω output impedance in an 8-pin SO package - ideal for battery current monitoring in notebook computers and portable systems.
For engineers reviewing the MAX4372FESA datasheet, MAX4372FESA pinout, MAX4372FESA application, or MAX4372FESA equivalent, this device offers verified high-side sensing with 0–28V common-mode range independent of supply voltage, voltage-output architecture eliminating external gain resistors, and RoHS-compliant 8-pin SO packaging suitable for space-constrained power-management designs.
Technical Context
The MAX4372FESA uses a proprietary current-mirror-based architecture to convert differential sense voltage (VRS+ – VRS−) into a proportional voltage output without external feedback components. Its input common-mode range spans 0V to 28V regardless of VCC, enabling accurate current measurement during deep battery discharge.
It features internal gain-setting (50V/V), rail-to-rail output capability up to VCC − 0.25V, and stable operation with capacitive loads up to 1000pF. The device achieves 200kHz −3dB bandwidth at 50V/V gain with 10pF load and settles to 1% in 20µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - fixed internal gain enables direct voltage output proportional to sense resistor voltage drop |
| Supply Voltage Range | 2.7V to 28V - supports wide-input battery and DC bus monitoring without external regulators |
| Input Common-Mode Range | 0V to 28V - operates down to 0V common-mode, critical for 2-cell Li-ion battery packs in deep discharge |
| Full-Scale Accuracy | ±0.18% - ensures precise current measurement across temperature and supply variations |
| Supply Current | 30μA typical - ultra-low quiescent current extends battery life in always-on monitoring circuits |
| Input Offset Voltage | 0.3mV typical at +25°C - minimizes error in low-current sensing applications (e.g., <100mA) |
| Output Impedance | 1.5Ω - drives standard ADC inputs and long traces without signal degradation |
Pinout & Package
MAX4372FESA is housed in an 8-pin SO (Small Outline) package with exposed pad option not specified. Pin functions are electrically validated per Maxim's official pin description table.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and output stage; must be connected to system ground plane |
| 2 | OUT | Voltage output proportional to sensed current; drives ADC or comparator with 1.5Ω source impedance |
| 3 | VCC | Positive supply input; requires ≥0.1μF ceramic decoupling capacitor placed near pin |
| 4 | RS+ | High-side connection to sense resistor; accepts common-mode voltages up to 28V independent of VCC |
| 5 | RS− | Load-side connection to sense resistor; forms differential input pair with RS+ |
| 6, 7, 8 | N.C. | No internal connection - left unconnected; no routing or thermal consideration required |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-output architecture | Eliminates need for external gain-setting resistors, reducing BOM count and layout area |
| 0–28V input common-mode range | Enables monitoring of battery discharge down to 0V while maintaining accuracy |
| 30μA supply current | Supports always-on current logging in battery-powered devices without significant runtime penalty |
| 0.18% full-scale accuracy | Reduces calibration overhead in production test and improves state-of-charge estimation fidelity |
| 1.5Ω output impedance | Drives 10kΩ+ ADC inputs directly without buffer amplifiers or trace-length compensation |
Applications
| Notebook Computer Power Monitoring | Smart Battery Charger Feedback |
|---|---|
Use Scenario: Real-time battery discharge current tracking during active CPU/GPU load transitions. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting milliohm-sense resistor voltage into calibrated analog output for system PMIC or microcontroller ADC. Use Value: Enables accurate remaining battery capacity estimation and thermal throttling decisions without ground path disruption. | Use Scenario: Precision current regulation loop in USB-C PD or multi-chemistry smart battery chargers. IC Role / Device Role / Timing Role: High-side current sensor feeding closed-loop control circuitry to maintain constant-current charge phase within ±0.5% tolerance. Use Value: Ensures safe and compliant charging across Li-ion, Li-Po, and NiMH chemistries by delivering verified current feedback independent of charger ground noise. |
| Portable Medical Device Battery Management | Industrial IoT Sensor Node Power Audit |
Use Scenario: Low-power current auditing in handheld diagnostic tools with dual-cell Li-ion batteries. IC Role / Device Role / Timing Role: Micropower current monitor providing periodic current snapshots to MCU for duty-cycle optimization and fault detection. Use Value: Extends operational time between charges by enabling adaptive sleep/wake scheduling based on real measured load profiles. | Use Scenario: Long-term energy consumption profiling in battery-powered edge sensors deployed in remote locations. IC Role / Device Role / Timing Role: High-accuracy current-sense front-end capturing transient load events (e.g., radio transmit bursts) for firmware-based power budgeting. Use Value: Delivers sub-1% current measurement fidelity over −40°C to +85°C, supporting reliable 10-year field deployment without 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 |
|---|---|---|---|
| MAX4080FASA+ | 50V/V gain, wider 4.5V–76V supply range, higher 125μA supply current, SO-8 package | Designed for industrial/high-voltage DC bus monitoring; less suitable for sub-3V battery systems | Select when monitoring >28V supplies or requiring enhanced ESD robustness (±8kV HBM) |
| INA219AIDR | I²C digital output, integrated 12-bit ADC, 0.1% gain error, 26V max common-mode, SO-8 package | Provides direct digital current/power reporting; lacks analog voltage output and true 0V common-mode capability | Select when system MCU lacks ADC or requires built-in power/energy calculation without additional firmware |
Compared with MAX4372FESA, MAX4080FASA+ supports higher supply voltages but consumes >4× more current, while INA219AIDR eliminates analog signal chain complexity but sacrifices 0V common-mode operation and adds I²C dependency.
Availability
MAX4372FESA is available at Aetrix Electronics and suitable for notebook computer power management, smart battery charger feedback, and portable medical device battery monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MAX4372FESA 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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and communication applications, now part of Analog Devices.
The MAX4372 family was designed specifically for micropower, high-accuracy high-side current sensing in battery-critical portable electronics - emphasizing zero-volt common-mode operation, minimal supply current, and voltage-output simplicity.
FAQ
What is the maximum common-mode voltage supported by the MAX4372FESA?
The MAX4372FESA supports a 0V to 28V input common-mode voltage range that is fully independent of its supply voltage (VCC). This means it can accurately sense current even when the battery voltage drops to 0V during deep discharge, a key requirement for modern multi-cell Li-ion systems. The specification is guaranteed across the full −40°C to +85°C operating temperature range.
Does the MAX4372FESA require external gain-setting resistors?
No, the MAX4372FESA does not require external gain-setting resistors. It integrates a fixed 50V/V gain amplifier internally, producing a voltage output directly proportional to the sense resistor voltage drop (VSENSE). This eliminates component count, board area, and matching errors associated with discrete resistor networks - a core design advantage confirmed in the device's functional diagram and electrical characteristics table.
What package type is used for the MAX4372FESA?
The MAX4372FESA uses an 8-pin SO (Small Outline) package, as explicitly stated in the Ordering Information table and Package Information section of the official datasheet. This differs from the SOT23-5 and UCSP variants in the same family. The SO package provides higher thermal mass and easier hand-soldering compared to SOT23, while maintaining industry-standard footprint compatibility.
Can the MAX4372FESA operate from a 2.5V supply?
No, the MAX4372FESA cannot operate reliably from a 2.5V supply. Its absolute minimum operating supply voltage is 2.7V, as specified in the Electrical Characteristics table under "Operating Voltage Range". Operation below 2.7V may result in undefined behavior, reduced accuracy, or failure to meet the guaranteed 0.18% full-scale accuracy and 30μA supply current specifications.
What is the output impedance of the MAX4372FESA, and why does it matter?
The MAX4372FESA has a guaranteed 1.5Ω output impedance, measured at full-scale output conditions. This low value allows direct driving of standard 10kΩ+ ADC inputs without signal attenuation or settling-time penalties. It also minimizes sensitivity to PCB trace resistance and enables stable operation with up to 1000pF capacitive load - critical for noise immunity in noisy power-system environments where the MAX4372FESA is typically deployed.
MAX4372FESA 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:
- 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:
- 8-SOIC
MAX4372FESA FAQ
1.How can I place an order for MAX4372FESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372FESA 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 MAX4372FESA reliable?
The price and inventory of MAX4372FESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372FESA is usually 5 days.
3.What payment methods are accepted for MAX4372FESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372FESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372FESA?
MAX4372FESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372FESA 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 MAX4372FESA?
For technical support, including MAX4372FESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372FESA requirements.
6.How does Aetrix verify that MAX4372FESA is sourced from the original manufacturer or authorized distributors?
All MAX4372FESA 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 MAX4372FESA meets industry standards.
7.What is the process for return or replacement of MAX4372FESA?
All MAX4372FESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372FESA, 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 MAX4372FESA part is unused and in its original packaging.
Return procedure for MAX4372FESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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