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Analog Devices Inc./Maxim Integrated MAX4376HAUK-T
- Part No.:
- MAX4376HAUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4376HAUK-T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,178
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Product details
Overview
MAX4376HAUK-T from Maxim Integrated is a single-channel, high-side current-sense amplifier with fixed +100V/V gain, 0–28V input common-mode range independent of supply voltage, ±0.5% typical full-scale accuracy at +25°C, and 1.2MHz bandwidth. It operates from +3V to +28V supply, draws 1mA typical supply current, and is housed in a 5-pin SOT23 package for battery-charger feedback and fuel-gauge monitoring in automotive and portable systems.
For engineers reviewing the MAX4376HAUK-T datasheet, MAX4376HAUK-T pinout, MAX4376HAUK-T application, or MAX4376HAUK-T equivalent, key selection criteria include its 100× fixed gain, high-accuracy current sensing down to 0V common-mode, buffered 2mA-output voltage interface, AEC-Q100 qualification, and compatibility with low-inductance sense resistors in space-constrained PCB layouts.
Technical Context
The MAX4376HAUK-T implements a precision high-side current-sense architecture using an internal current-mirror-based amplifier with fixed +100V/V gain. Its input common-mode range (0V to +28V) remains fully functional even when VRS+ falls below VCC, enabling accurate battery discharge monitoring without ground-path interference.
It features a buffered voltage output capable of sourcing/sinking up to 2mA into a ground-referenced load, with 1.2MHz small-signal bandwidth and 400ns output settling time to 1% for 6.25mV–100mV step inputs. Power-supply rejection exceeds 66dB across +3V to +28V supply variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - sets full-scale output = 10V for 100mV sense voltage; enables precise low-current detection with high RSENSE |
| Common-Mode Input Range | 0V to +28V - supports direct connection to battery packs in deep discharge without loss of functionality |
| Total Output Voltage Error | ±0.5% (typ) at +25°C - ensures <±5mV error on 10V full-scale output for high-accuracy fuel gauging |
| Supply Voltage Range | +3V to +28V - allows operation across wide-input automotive and industrial power rails |
| Bandwidth | 1.2MHz - sufficient for closed-loop control in fast-switching battery chargers (e.g., MAX1745-based designs) |
| Supply Current | 1mA (typ) per amplifier - minimizes quiescent power in always-on current-monitoring paths |
| Operating Temperature | -40°C to +125°C - meets full automotive AEC-Q100 Grade 0 requirements for under-hood applications |
Pinout & Package
The MAX4376HAUK-T is packaged in a RoHS-compliant 5-pin SOT23 (package code U5+2A, outline 21-0057), with thermal resistance θJA = 255.9°C/W on multi-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Buffered voltage output | Delivers VOUT = 100 × (VRS+ – VRS-) with 2mA drive capability; connects directly to ADC or comparator |
| 2 (GND) | Analog ground reference | Return path for internal circuitry and output stage; must be tied to system analog ground plane |
| 3 (VCC) | Positive supply input | Accepts +3V to +28V; powers internal amplifier and buffer; PSR >66dB reduces supply noise coupling |
| 4 (RS+) | High-side sense resistor input | Connects to battery/DC source side of external RSENSE; withstands up to +30V absolute max |
| 5 (RS-) | Load-side sense resistor input | Connects to load side of RSENSE; differential input handles ±8V max voltage swing |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +100V/V gain | Eliminates external gain-setting resistors; simplifies layout and improves gain stability vs. temperature |
| 0V to +28V common-mode range | Enables true high-side sensing during battery deep discharge (<2V) without signal loss or offset drift |
| ±0.5% full-scale accuracy (TA = +25°C) | Supports sub-1% state-of-charge estimation in smart battery packs and fuel gauges |
| Buffered 2mA output drive | Drives ADC input or op-amp stage directly without external buffer; reduces BOM count |
| AEC-Q100 qualified | Validated for automotive applications including battery management and PA bias control in infotainment systems |
Applications
| Battery Fuel Gauging | Battery Charger Feedback Loop |
|---|---|
Use Scenario: Real-time monitoring of charge/discharge current in laptop or tablet smart battery packs to compute remaining capacity. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting ILOAD × RSENSE into proportional 0–10V analog output for microcontroller ADC sampling. Use Value: Enables ±0.5% full-scale accuracy at +25°C and stable performance down to 0V common-mode, critical for accurate coulomb counting over full battery voltage range. | Use Scenario: Closed-loop current regulation in switch-mode battery chargers (e.g., using MAX1745 controller) to maintain constant-current phase. IC Role / Device Role / Timing Role: High-bandwidth (+1.2MHz) current feedback sensor providing real-time load current data to charger IC error amplifier. Use Value: 400ns output settling time and 1.2MHz bandwidth ensure fast response to load transients, improving charge efficiency and thermal safety. |
| Automotive Body Control Module | Portable System Power Monitoring |
Use Scenario: Detecting overcurrent conditions in 12V/24V automotive loads such as seat heaters, window motors, or lighting circuits. IC Role / Device Role / Timing Role: High-side current monitor interfacing with microcontroller GPIO or analog input to trigger fault shutdown within 1µs saturation recovery time. Use Value: -40°C to +125°C operation and AEC-Q100 qualification ensure reliability in under-hood environments; 0–28V common-mode supports dual-battery architectures. | Use Scenario: Board-level current supervision in handheld medical devices or industrial IoT sensors to detect abnormal sleep-mode leakage or short-circuit faults. IC Role / Device Role / Timing Role: Low-quiescent (1mA) high-side amplifier feeding diagnostic ADC channel for runtime power budgeting and failure prediction. Use Value: 1mA supply current minimizes impact on standby battery life; buffered output eliminates need for external op-amp, reducing footprint in compact PCBs. |
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 |
|---|---|---|---|
| MAX4376FAUK-T | +50V/V gain (vs. +100V/V); same package, temp range, and accuracy spec | Better suited for higher full-scale currents (e.g., 10A with 10mΩ RSENSE) where 5V output suffices | Select when lower gain improves SNR for mid-range currents and reduces sensitivity to RSENSE tolerance |
| INA240A1D | BiCMOS vs. CMOS input; 80V/V gain; 100kHz bandwidth; 2.5µV/°C offset drift (vs. MAX4376H's 0.5% FS error) | Higher voltage rating (80V common-mode) but lower bandwidth limits use in fast charger loops | Prefer for industrial 48V systems requiring extended common-mode range; avoid where >1MHz bandwidth is required |
Compared with MAX4376FAUK-T and INA240A1D, the MAX4376HAUK-T delivers highest gain and bandwidth in the MAX4376 family, making it optimal for low-current, high-precision applications like fuel gauging-where 100× gain maximizes ADC utilization and 1.2MHz bandwidth supports dynamic load tracking.
Availability
MAX4376HAUK-T is available at Aetrix Electronics and suitable for battery fuel gauging, automotive body control modules, and portable system power monitoring requiring stable component supply, AEC-Q100 compliance, and high-accuracy high-side current sensing.
Supply support for MAX4376HAUK-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 automotive, industrial, and computing applications, with emphasis on power management, sensing, and interface solutions.
The MAX4376 family targets high-side current sensing in space-constrained, battery-sensitive systems-delivering integrated gain, wide common-mode range, and automotive-grade reliability without external components.
FAQ
What is the gain setting of MAX4376HAUK-T and how is it implemented?
The MAX4376HAUK-T has a fixed +100V/V gain, determined by internal laser-trimmed resistor ratios and current-mirror topology-not external components. This eliminates gain-setting resistor errors and drift, ensuring ±0.5% typical full-scale accuracy at +25°C. The 'H' suffix in MAX4376HAUK-T explicitly denotes the 100× gain version per Maxim's ordering convention.
Does MAX4376HAUK-T support operation with a battery voltage below the supply voltage (VCC)?
Yes. The MAX4376HAUK-T features a 0V to +28V input common-mode range that is fully independent of VCC. It functions correctly even when VRS+ drops to 0V (e.g., deeply discharged battery), while VCC remains at +3V–+28V. This enables uninterrupted current monitoring during full battery discharge cycles without ground-path disruption.
What is the maximum capacitive load the MAX4376HAUK-T output can drive without oscillation?
The MAX4376HAUK-T output is stable with up to 1000pF capacitive load, as specified in the Electrical Characteristics table. Driving larger capacitances may cause peaking or sustained oscillation. For ADC interfaces requiring >1nF sample-and-hold capacitance, use a series resistor (e.g., 10–50Ω) between MAX4376HAUK-T OUT and the ADC input to isolate the capacitive load.
Is MAX4376HAUK-T qualified for automotive applications?
Yes. The MAX4376HAUK-T is AEC-Q100 qualified (Grade 0, -40°C to +125°C) and listed in Maxim's automotive ordering information. Its guaranteed operation across the full automotive temperature range, 0–28V common-mode capability, and robust ESD/latch-up immunity make it suitable for battery management, body control, and infotainment power monitoring in vehicles.
How does the buffered output of MAX4376HAUK-T simplify system design?
The MAX4376HAUK-T's buffered output sources/sinks up to 2mA while maintaining linearity and accuracy, eliminating the need for external op-amp buffers. This reduces PCB area, component count, and potential error sources (e.g., external resistor tolerance, op-amp offset). It directly drives standard SAR ADC inputs, comparators, or microcontroller analog pins-enabling compact, high-fidelity current-sensing subsystems.
MAX4376HAUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.2 MHz
- Current - Input Bias:
- 800 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 1mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4376HAUK-T FAQ
1.How can I place an order for MAX4376HAUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4376HAUK-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 MAX4376HAUK-T reliable?
The price and inventory of MAX4376HAUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4376HAUK-T is usually 5 days.
3.What payment methods are accepted for MAX4376HAUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4376HAUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4376HAUK-T?
MAX4376HAUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4376HAUK-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 MAX4376HAUK-T?
For technical support, including MAX4376HAUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4376HAUK-T requirements.
6.How does Aetrix verify that MAX4376HAUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4376HAUK-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 MAX4376HAUK-T meets industry standards.
7.What is the process for return or replacement of MAX4376HAUK-T?
All MAX4376HAUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4376HAUK-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 MAX4376HAUK-T part is unused and in its original packaging.
Return procedure for MAX4376HAUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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