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Analog Devices Inc./Maxim Integrated MAX4372HEBT
- Part No.:
- MAX4372HEBT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-WFBGA
- Datasheet:
-
MAX4372HEBT.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 5UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,421
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Product details
Overview
MAX4372HEBT from Maxim Integrated is a precision high-side current-sense amplifier with 100V/V fixed gain, operating from 2.7V to 28V supply, consuming only 30µA quiescent current, featuring 0.3mV input offset voltage, 0.18% full-scale accuracy, and 0 to 28V input common-mode range independent of supply - deployed in notebook computers, smart-battery chargers, and portable systems for accurate battery current monitoring.
For engineers reviewing the MAX4372HEBT datasheet, MAX4372HEBT pinout, MAX4372HEBT application, or MAX4372HEBT equivalent, this device delivers verified high-side sensing capability without ground-path interference, supports compact SOT23-5 layout, enables direct analog voltage output for ADC interfacing, and maintains stable performance across deep-discharge battery voltages (down to 0V common-mode).
Technical Context
The MAX4372HEBT uses a BiCMOS current-mirror architecture to convert 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 range (0–28V), decoupled from VCC, enabling accurate sensing even when VRS+ falls below VCC during battery deep discharge.
It integrates internal biasing and output buffering with 1.5Ω output impedance, delivering fast settling (20µs to 1% for 100mV step) and stable operation into 10pF loads. Gain accuracy is ±5.5% over temperature, and total output voltage error remains within ±0.18% at +25°C with ±0.15% typical full-scale error under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output = 10V for 100mV sense voltage, enabling direct interface with 10-bit ADCs using 3.3V or 5V reference. |
| Supply Current | 30µA - enables always-on current monitoring in battery-powered devices with negligible impact on standby runtime. |
| Input Offset Voltage | 0.3mV - limits minimum resolvable sense voltage to ~3µA across 100mΩ shunt, supporting low-current precision measurement. |
| Common-Mode Range | 0V to 28V, supply-independent - allows monitoring of 2-cell Li-ion packs down to 0V per cell without loss of functionality. |
| Full-Scale Accuracy | ±0.18% at +25°C - ensures <±1.8mV absolute error at 10V output, critical for SOC estimation and charge termination algorithms. |
| Output Impedance | 1.5Ω - permits direct driving of 10kΩ+ ADC inputs without buffer, reducing BOM count and board area. |
| Bandwidth | 110kHz (−3dB) - supports dynamic load transient detection in DC-DC converters and fast-charging control loops. |
Pinout & Package
MAX4372HEBT is housed in a space-saving 5-pin SOT23 package (3.0mm × 1.7mm × 1.3mm) with gull-wing leads, optimized for high-density portable PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Current-sense resistor low-side terminal | Connects to load-side of shunt; referenced to GND; forms differential input with RS+. |
| 2 (OUT) | Analog voltage output | Delivers gain × (VRS+ − VRS−); buffered, low-impedance; directly interfaces to ADC or comparator. |
| 3 (GND) | Analog ground reference | Return path for internal circuitry and output stage; must be tied to system AGND near shunt. |
| 4 (VCC) | Positive supply input | Accepts 2.7V–28V; requires ≥0.1µF local ceramic decoupling to suppress switching noise. |
| 5 (RS+) | Current-sense resistor high-side terminal | Connects to battery/DC source side of shunt; supports up to 28V common-mode voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-output architecture | Eliminates need for external gain resistors or op-amp feedback networks - reduces component count and layout sensitivity. |
| Micropower operation | 30µA supply current enables continuous current logging in energy-constrained IoT nodes and wearables. |
| Supply-independent common-mode range | 0–28V input range functions identically whether VCC = 3.3V or 12V - simplifies design across multi-rail systems. |
| High-side sensing topology | Preserves system ground integrity; avoids interference with battery charger return paths and signal ground references. |
| SOT23-5 footprint | Standardized 5-pin package enables drop-in replacement in existing designs and compatibility with automated pick-and-place. |
Applications
| Smart-Battery Chargers | Notebook Computers |
|---|---|
Use Scenario: Real-time monitoring of charge/discharge current in Li-ion battery packs with integrated fuel gauging ICs. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog feedback to microcontroller ADC for Coulomb counting and state-of-charge calculation. Use Value: Enables ±0.18% full-scale accuracy over temperature, improving battery life estimation by <±1.5% absolute SOC error versus lower-accuracy alternatives. | Use Scenario: System-level power rail current monitoring for CPU/GPU VRMs and display backlight drivers. IC Role / Device Role / Timing Role: Precision current sensor feeding real-time telemetry to embedded power management controller for thermal throttling and adaptive power budgeting. Use Value: 110kHz bandwidth captures rapid load transients from processor burst activity, supporting dynamic power capping with <20µs response latency. |
| Portable Medical Devices | Industrial Handheld Meters |
Use Scenario: Battery current supervision in portable ECG monitors and infusion pumps requiring FDA-grade accuracy and low-power operation. IC Role / Device Role / Timing Role: High-side analog front-end for battery health diagnostics, interfacing directly to low-power SAR ADC in ultra-low-power MCU. Use Value: 30µA quiescent current extends single-charge runtime beyond 72 hours while maintaining sub-0.3mV offset for microamp-level leakage detection. | Use Scenario: Field-portable multimeters and clamp-meter hybrids requiring high common-mode rejection in noisy industrial environments. IC Role / Device Role / Timing Role: Isolated current measurement element in 4-wire shunt-based topology, rejecting ground-loop interference from motor drives or PLC outputs. Use Value: 85dB CMR and 0–28V common-mode range ensure stable readings even when measuring 24VDC control circuits with >10V ground potential differences. |
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+ | Higher gain accuracy (±0.5% vs ±5.5%), wider bandwidth (250kHz), but 100µA supply current and SO-8 package. | Preferred for high-speed power supply telemetry; less suitable for ultra-low-power battery monitoring. | Select MAX4080TASA+ when bandwidth and gain stability outweigh quiescent current constraints. |
| INA219AIDR | I²C digital output, integrated 12-bit ADC and multiplier, 1mA supply current, 1% gain error, SO-8 package. | Targets microcontroller-based systems needing digital bus integration; lacks analog voltage output flexibility. | Choose INA219AIDR when digital interface, on-chip calibration, and bus-addressability are required over analog simplicity. |
Compared with MAX4372HEBT, MAX4080TASA+ trades 3.3× higher supply current for 10× better gain accuracy and 2.3× bandwidth, while INA219AIDR replaces analog output with I²C digital reporting - making MAX4372HEBT optimal for cost-sensitive, low-power analog-sensing applications where minimal BOM and direct ADC interfacing are priorities.
Availability
MAX4372HEBT is available at Aetrix Electronics and suitable for notebook computers, smart-battery chargers, and portable medical devices requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX4372HEBT 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 analog, mixed-signal, and power-management ICs for industrial, computing, and portable applications.
The MAX4372 family was designed specifically for high-side current sensing in space-constrained, battery-operated systems - prioritizing micropower operation, supply-independent common-mode range, and analog voltage output simplicity.
FAQ
What is the maximum common-mode voltage supported by the MAX4372HEBT?
The MAX4372HEBT supports a 0V to 28V input common-mode voltage 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 is powered from a separate 3.3V or 5V rail. The specification is guaranteed across the full −40°C to +85°C operating temperature range.
Does the MAX4372HEBT require external gain-setting resistors?
No, the MAX4372HEBT does not require external gain-setting resistors. It integrates a fixed 100V/V gain amplifier with internal precision resistive feedback. This eliminates component count, layout sensitivity, and resistor tolerance errors - delivering a direct voltage output equal to 100 × (VRS+ − VRS−). The MAX4372HEBT's architecture is optimized for plug-and-play current sensing with no external passive tuning needed.
What is the supply voltage range for the MAX4372HEBT?
The MAX4372HEBT operates from a single supply voltage ranging from 2.7V to 28V. This wide range supports direct connection to diverse power sources including single-cell Li-ion (2.7–4.2V), USB PD rails (5V–20V), and industrial 24V systems. The device draws only 30µA across this entire range, and its input common-mode capability remains unchanged regardless of VCC value - a key differentiator from conventional op-amp-based solutions.
How does the MAX4372HEBT handle overvoltage or saturation conditions?
The MAX4372HEBT features internal output clamping that prevents the OUT pin from exceeding 12V, protecting downstream ADC inputs. When overdriven, it recovers in 0.1ms to within 1% of final value (typical). The device also avoids phase reversal under overdrive (per Note 9 in datasheet), ensuring predictable behavior during fault events like short-circuit detection. Output impedance remains stable at 1.5Ω even under saturation, preserving drive capability.
Is the MAX4372HEBT pin-compatible with other variants in the MAX4372 family?
Yes, the MAX4372HEBT shares identical pinout and package (SOT23-5) with the MAX4372TEBT and MAX4372FEBT - differing only in gain (100V/V vs 20V/V or 50V/V). All three variants use the same RS+, RS−, OUT, VCC, and GND connections and are functionally interchangeable in layout; gain selection is purely a performance trade-off based on shunt resistor value and desired output scaling.
MAX4372HEBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-WFBGA
- 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:
- 5-UCSP (1x1.52)
MAX4372HEBT FAQ
1.How can I place an order for MAX4372HEBT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372HEBT 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 MAX4372HEBT reliable?
The price and inventory of MAX4372HEBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372HEBT is usually 5 days.
3.What payment methods are accepted for MAX4372HEBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372HEBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372HEBT?
MAX4372HEBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372HEBT 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 MAX4372HEBT?
For technical support, including MAX4372HEBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372HEBT requirements.
6.How does Aetrix verify that MAX4372HEBT is sourced from the original manufacturer or authorized distributors?
All MAX4372HEBT 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 MAX4372HEBT meets industry standards.
7.What is the process for return or replacement of MAX4372HEBT?
All MAX4372HEBT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372HEBT, 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 MAX4372HEBT part is unused and in its original packaging.
Return procedure for MAX4372HEBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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