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Analog Devices Inc./Maxim Integrated MAX4372FESA+T
- Part No.:
- MAX4372FESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4372FESA+T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,856
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Product details
Overview
MAX4372FESA+T from Maxim Integrated is a precision high-side current-sense amplifier with 50V/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 low 1.5Ω output impedance in an 8-pin SO package - enabling accurate battery current monitoring in notebook computers and portable systems.
For engineers reviewing the MAX4372FESA+T datasheet, MAX4372FESA+T pinout, MAX4372FESA+T application, or MAX4372FESA+T equivalent, this device supports high-accuracy, micropower, high-side sensing where ground-path integrity is critical - especially in smart-battery chargers, cell phones, and board-level power-management systems requiring stable common-mode operation down to 0V.
Technical Context
The MAX4372FESA+T implements a high-side current-sense architecture using a precision current-mirror-based amplifier topology with internal gain-setting. Its 0–28V input common-mode range is fully independent of VCC, allowing reliable sensing even during deep battery discharge (e.g., 2-cell Li-ion at ~2V).
It features a rail-to-rail-capable voltage-output stage with 1.5Ω output impedance and 200kHz −3dB bandwidth (at 50V/V gain, 10pF load), optimized for low-noise, low-drift DC and slow-varying current measurements - not high-speed transient capture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - sets full-scale output voltage = 50 × sense voltage across external resistor |
| Supply Voltage Range | 2.7V to 28V - supports single-supply operation across wide battery and DC bus voltages |
| Input Common-Mode Range | 0V to 28V, independent of VCC - enables sensing at battery cathode during deep discharge without ground disruption |
| Full-Scale Accuracy | ±0.18% at +25°C - ensures <±180μV error on 100mV sense voltage for high-precision calibration |
| Input Offset Voltage | ±0.8mV max (TYP 0.3mV) at +25°C - limits minimum detectable sense voltage to ~16μV (at 50V/V gain) |
| Quiescent Current | 30μA typical - enables always-on current monitoring in battery-critical applications with negligible drain |
| Output Impedance | 1.5Ω - allows direct connection to ADC inputs or op-amp buffers without isolation resistors |
Pinout & Package
MAX4372FESA+T is housed in an 8-pin SO (small-outline) package with exposed pad (RoHS-compliant, lead-free). Pin functions are electrically identical across MAX4372T/F/H variants; no internal connections exist on pins 2, 5, and 7.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RS− | Load-side terminal of external sense resistor - connects to system ground or load return path |
| 3 | OUT | Voltage output proportional to sensed current - drives ADC, comparator, or control logic directly |
| 4 | VCC | Positive supply input - requires ≥0.1μF local decoupling capacitor for stability |
| 6 | RS+ | Power-side terminal of external sense resistor - connects between battery/DC source and load |
| 8 | GND | Analog ground reference - must be tied to system ground plane with low-impedance path |
Key Features
| Feature | Design Value |
|---|---|
| High-side sensing architecture | Preserves uninterrupted ground path for battery chargers and load circuits - eliminates ground-loop errors |
| 0.18% full-scale accuracy | Enables ±0.1% current measurement resolution after calibration - suitable for smart-battery fuel gauging |
| 30μA supply current | Permits continuous current monitoring in ultra-low-power modes (e.g., sleep-state battery tracking) |
| 0–28V common-mode input range | Supports sensing on 12V, 24V, or multi-cell Li-ion rails without level-shifting or auxiliary supplies |
| 50V/V fixed gain | Eliminates external gain-setting resistors - reduces BOM count and layout sensitivity to parasitic capacitance |
Applications
| Smart-Battery Chargers | Notebook Computers |
|---|---|
Use Scenario: Real-time charging current monitoring during CC/CV phases of Li-ion battery packs. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog voltage output proportional to charge current. Use Value: Enables precise coulomb counting and thermal management by delivering 50× amplified, low-drift signal with 0.18% accuracy - independent of charger ground noise. |
Use Scenario: System-level power budgeting and adapter/battery current arbitration in dual-power laptops. IC Role / Device Role / Timing Role: High-side monitor on main power rail feeding CPU/GPU VRMs and battery interface. Use Value: Provides 30μA-quiescent, 2.7–28V-compatible current feedback for dynamic power allocation - without disrupting shared ground references. |
| Portable/Battery-Powered Systems | Power-Management Systems |
Use Scenario: Runtime current profiling in handheld medical devices or IoT sensors with coin-cell or LiPo batteries. IC Role / Device Role / Timing Role: Micropower high-side current sensor interfacing directly to low-voltage SAR ADCs. Use Value: Delivers 1.5Ω buffered output and 0.3mV offset to resolve sub-mA currents - extending battery life via accurate sleep-mode current estimation. |
Use Scenario: Board-level current supervision in industrial controllers or telecom line cards with redundant 12V/24V supplies. IC Role / Device Role / Timing Role: Fault-detection front-end converting shunt voltage to robust analog output for MCU or PMU monitoring. Use Value: Supports 0V–28V common-mode operation to sense current on hot-swappable modules - eliminating need for isolated amplifiers or level shifters. |
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, 2.7–76V supply, 125μA ICC, SO-8 package | Wider supply range supports 48V systems; higher supply current limits ultra-low-power use | Select when sensing >28V rails is required; avoid if micropower (<50μA) is mandatory |
| INA219AIDR | I²C digital output, 26V max common-mode, integrated 12-bit ADC, SO-8 | Provides direct digital current/power reporting; lacks analog voltage output flexibility | Select when system MCU lacks ADC or requires built-in calibration registers - not for analog feedback loops |
Compared with MAX4372FESA+T, MAX4080FASA+ extends voltage range but increases supply current fivefold, while INA219AIDR replaces analog output with I²C digital reporting - making MAX4372FESA+T optimal for low-power, analog-loop, high-side sensing below 28V.
Availability
MAX4372FESA+T is available at Aetrix Electronics and suitable for notebook computers, smart-battery chargers, and portable/battery-powered systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4372FESA+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, mixed-signal, and power-management ICs for demanding industrial, computing, and portable applications.
The MAX4372 family targets high-side current sensing in space-constrained, battery-sensitive systems - delivering micropower operation, wide common-mode range, and factory-trimmed accuracy without external gain components.
FAQ
What is the supply voltage range for MAX4372FESA+T?
The MAX4372FESA+T operates from a single 2.7V to 28V supply. This range supports direct connection to Li-ion battery packs (2.7–4.2V per cell), 5V/12V/24V system rails, and automotive 12V nominal systems - all while maintaining full functionality across the entire common-mode input range.
Does MAX4372FESA+T support sensing at 0V common-mode voltage?
Yes, MAX4372FESA+T guarantees operation down to 0V common-mode input voltage, independent of supply voltage. This capability enables accurate current monitoring during deep battery discharge (e.g., 2-cell Li-ion at ~2V total) without loss of signal fidelity or output saturation.
What is the gain configuration of MAX4372FESA+T?
MAX4372FESA+T is the 50V/V gain version of the MAX4372 family. Its fixed internal gain eliminates external resistors, ensuring consistent transfer function: VOUT = 50 × (VRS+ − VRS−). This matches applications requiring mid-range sensitivity - such as 10A full-scale with 20mΩ sense resistor yielding 1V output.
How does the 30μA quiescent current of MAX4372FESA+T benefit battery-powered designs?
The 30μA supply current of MAX4372FESA+T minimizes standby power loss - critical for always-on current monitoring in battery-backed systems. For example, in a device drawing 10μA system sleep current, adding MAX4372FESA+T increases total draw by only 3×, preserving months of shelf life without compromising real-time telemetry.
Is MAX4372FESA+T pin-compatible with other MAX4372 variants?
Yes, MAX4372FESA+T shares identical pinout and package (8-pin SO) with MAX4372TESA+ and MAX4372HESA+. Only the gain differs (20V/V, 50V/V, 100V/V); all electrical interfaces, supply requirements, and common-mode specifications remain unchanged - enabling drop-in selection based on required sensitivity.
MAX4372FESA+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:
- Active
- 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+T FAQ
1.How can I place an order for MAX4372FESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372FESA+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 MAX4372FESA+T reliable?
The price and inventory of MAX4372FESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372FESA+T is usually 5 days.
3.What payment methods are accepted for MAX4372FESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372FESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372FESA+T?
MAX4372FESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372FESA+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 MAX4372FESA+T?
For technical support, including MAX4372FESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372FESA+T requirements.
6.How does Aetrix verify that MAX4372FESA+T is sourced from the original manufacturer or authorized distributors?
All MAX4372FESA+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 MAX4372FESA+T meets industry standards.
7.What is the process for return or replacement of MAX4372FESA+T?
All MAX4372FESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372FESA+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 MAX4372FESA+T part is unused and in its original packaging.
Return procedure for MAX4372FESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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