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Analog Devices Inc./Maxim Integrated MAX4372HESA-T
- Part No.:
- MAX4372HESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4372HESA-T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,606
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Product details
Overview
MAX4372HESA-T 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 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-T datasheet, MAX4372HESA-T pinout, MAX4372HESA-T application, or MAX4372HESA-T equivalent, key selection criteria include its SOT23-5 package, voltage-output architecture eliminating external gain resistors, high common-mode rejection (85dB), micropower operation, and compatibility with deep-discharge battery sensing down to 0V.
Technical Context
The MAX4372HESA-T employs a proprietary current-mirror-based amplifier topology that converts differential sense voltage (VRS+ – VRS−) into a proportional voltage output without requiring external feedback components. Its input stage maintains functional operation across 0–28V common-mode voltage regardless of VCC, enabling direct connection to battery terminals during deep discharge.
It features rail-to-rail output swing capability (VOUT up to VCC − 0.25V), low 1.5Ω output impedance, and 110kHz −3dB bandwidth at 100V/V gain. Power-up settling time is 0.5ms to 1%, and saturation recovery completes within 0.1ms-critical for fast transient load monitoring in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output to 10V for 100mV sense voltage, enabling high-resolution current measurement with minimal VSENSE overhead |
| Supply Voltage Range | 2.7V to 28V - supports single-supply operation across wide battery chemistries (Li-ion, Li-Po, multi-cell lead-acid) |
| Input Common-Mode Range | 0V to 28V, supply-independent - allows direct high-side sensing on battery anode even at near-zero cell voltage |
| Full-Scale Accuracy | ±0.18% at +25°C - ensures <±1.8mA error for 1A full-scale current with 10mΩ sense resistor |
| Input Offset Voltage | ±0.8mV max at +25°C - contributes ≤±0.8% error at 100mV full-scale sense voltage |
| Supply Current | 30μA typical - enables always-on current monitoring in battery-backed systems with negligible drain |
| −3dB Bandwidth | 110kHz at G = 100V/V - supports accurate pulse-current tracking up to ~17.5kHz square wave (10% overshoot) |
Pinout & Package
The MAX4372HESA-T is housed in an 8-pin SO (Small Outline) package with exposed pad (package code ESA), RoHS-compliant and rated for −40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RS− | Load-side terminal of external sense resistor; referenced to GND; must be held within ±0.3V differential of RS+ to avoid damage |
| 2 | RS+ | Power-side terminal of external sense resistor; connects directly to battery/anode or high-side power rail |
| 3 | GND | Analog ground reference; must be connected to system ground plane with low-impedance path to minimize noise coupling |
| 4 | OUT | Voltage output proportional to sensed current (VOUT = 100 × VSENSE); drives 1MΩ loads with ≤1.5Ω source impedance |
| 5 | VCC | Positive supply input; requires ≥0.1μF ceramic decoupling capacitor placed adjacent to pin |
| 6, 7, 8 | N.C. | No internal connection; left unconnected or tied to GND per layout best practices for thermal/EMI control |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-output architecture | Eliminates need for external gain-setting resistors, reducing BOM count and PCB area while improving temperature stability |
| 0.18% full-scale accuracy | Enables sub-1% current measurement error over temperature without calibration, critical for battery fuel gauging |
| 0–28V supply-independent common-mode range | Permits uninterrupted current monitoring during battery deep discharge (e.g., 2-cell Li-ion dropping to 4.2V total) |
| 30μA quiescent current | Supports continuous current logging in energy-constrained devices such as wearables and IoT sensors |
| 1.5Ω output impedance | Allows direct interface to ADC inputs or op-amp buffers without additional output buffering stages |
Applications
| Battery Fuel Gauging | Smart-Battery Charger Monitoring |
|---|---|
Use Scenario: Real-time tracking of charge/discharge current in embedded smart batteries for state-of-charge (SoC) estimation. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting mV-level sense voltage into scalable analog output for microcontroller ADC sampling. Use Value: Enables accurate coulomb counting with <±0.2% full-scale error, supporting battery life prediction within ±2% SoC margin. | Use Scenario: Monitoring charging current in USB-C PD or proprietary fast-charging circuits where ground-path integrity is essential. IC Role / Device Role / Timing Role: Precision current sensor placed between charger IC and battery terminal, isolating measurement from ground return path. Use Value: Prevents ground-loop interference and enables true high-side current regulation without compromising charger safety logic. |
| Notebook System Power Management | Portable Medical Device Current Supervision |
Use Scenario: Measuring CPU/GPU rail current in ultrabooks to trigger dynamic power throttling and thermal management. IC Role / Device Role / Timing Role: High-bandwidth (110kHz) current monitor feeding real-time data to system controller for adaptive voltage/frequency scaling. Use Value: Delivers 20μs settling time for step-load transients, ensuring responsive power-state transitions without measurement lag. | Use Scenario: Verifying safe current delivery in battery-powered infusion pumps and portable ECG monitors. IC Role / Device Role / Timing Role: Safety-critical current verification block placed upstream of motor driver or analog front-end, providing redundant current feedback. Use Value: Supports IEC 62304 Class C compliance via 0.3mV offset and ±0.18% accuracy, minimizing false fault triggers during low-current standby modes. |
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, 125kHz bandwidth, 2.7–76V supply, 125μA ICC | Higher supply range suits industrial 48V systems; higher quiescent current limits ultra-low-power use | Select when >28V common-mode or wider supply range required; not drop-in due to different gain and supply specs |
| INA219AIDR | I²C digital output, 16-bit ADC, 0–26V common-mode, 1mA ICC, integrated shunt | Digital interface simplifies MCU integration but adds latency; higher power draw precludes always-on monitoring | Choose for systems needing calibrated digital current/voltage/power data without external ADC; not voltage-output compatible |
Compared with MAX4372HESA-T, MAX4080TASA+ extends common-mode range beyond 28V but consumes >4× more supply current, while INA219AIDR replaces analog output with I²C digital reporting-making MAX4372HESA-T optimal for low-latency, micropower, voltage-output current sensing in portable battery systems.
Availability
MAX4372HESA-T is available at Aetrix Electronics and suitable for notebook computers, smart-battery packs, and portable medical devices requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX4372HESA-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, designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and consumer markets.
The MAX4372 family targets cost-sensitive, space-constrained battery-powered systems requiring high-accuracy, micropower, high-side current monitoring with minimal external components.
FAQ
What is the maximum common-mode voltage the MAX4372HESA-T can measure?
The MAX4372HESA-T supports a 0V to 28V input common-mode range that is fully independent of its supply voltage (VCC). This means it can accurately monitor current even when the sensed node is at 0V-such as a deeply discharged 2-cell Li-ion battery-while VCC remains at 2.7V or higher. The device remains functional across this entire range without performance degradation or need for level-shifting circuitry.
Does the MAX4372HESA-T require external gain-setting resistors?
No, the MAX4372HESA-T does not require external gain-setting resistors. It integrates a fixed 100V/V gain amplifier with voltage output, eliminating external feedback networks. This simplifies design, reduces PCB footprint, improves temperature stability, and avoids resistor tolerance-induced errors-making the MAX4372HESA-T a complete, self-contained current-sense solution.
What package type is used for the MAX4372HESA-T?
The MAX4372HESA-T uses an 8-pin SO (Small Outline) package with exposed thermal pad (package code ESA). It is RoHS-compliant, rated for −40°C to +85°C operation, and features standard SOIC land patterns (outline no. 21-0041, land pattern no. 90-0096). This package offers better thermal dissipation and higher reliability than the SOT23 variant, especially under sustained load conditions.
Can the MAX4372HESA-T be used with a 1.8V supply?
No, the MAX4372HESA-T cannot operate from a 1.8V supply. Its specified minimum supply voltage is 2.7V, and operation below this threshold is not guaranteed. Attempting to power the MAX4372HESA-T at 1.8V may result in undefined behavior, failure to bias internal circuitry, or inability to drive the output stage-so a minimum 2.7V supply must be maintained for reliable function of the MAX4372HESA-T.
How does the MAX4372HESA-T handle overvoltage on the RS+ and RS− pins?
Each RS+ and RS− pin of the MAX4372HESA-T has absolute maximum ratings of −0.3V to +30V relative to GND. Differential voltage across RS+ and RS− must not exceed ±0.3V. Exceeding these limits risks permanent damage. For overvoltage protection in harsh environments, external clamping diodes or TVS devices rated for ≤0.3V differential swing should be added-especially when interfacing with inductive loads or hot-swap events where the MAX4372HESA-T is deployed.
MAX4372HESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for MAX4372HESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372HESA-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 MAX4372HESA-T reliable?
The price and inventory of MAX4372HESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372HESA-T is usually 5 days.
3.What payment methods are accepted for MAX4372HESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372HESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372HESA-T?
MAX4372HESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372HESA-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 MAX4372HESA-T?
For technical support, including MAX4372HESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372HESA-T requirements.
6.How does Aetrix verify that MAX4372HESA-T is sourced from the original manufacturer or authorized distributors?
All MAX4372HESA-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 MAX4372HESA-T meets industry standards.
7.What is the process for return or replacement of MAX4372HESA-T?
All MAX4372HESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372HESA-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 MAX4372HESA-T part is unused and in its original packaging.
Return procedure for MAX4372HESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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