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Analog Devices Inc./Maxim Integrated MAX4376FAUK-T
- Part No.:
- MAX4376FAUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4376FAUK-T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,775
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Product details
Overview
MAX4376FAUK-T from Maxim Integrated is a single-channel, high-side current-sense amplifier with fixed +50V/V gain, 0–28V input common-mode range independent of supply voltage, ±0.5% typical full-scale accuracy at +25°C, and 1.7MHz bandwidth. It operates from +3V to +28V supply, draws 1mA typical supply current, and targets battery-charger control loops and precision current monitoring in automotive-grade portable systems.
For engineers reviewing the MAX4376FAUK-T datasheet, MAX4376FAUK-T pinout, MAX4376FAUK-T application, or MAX4376FAUK-T equivalent, key selection criteria include its fixed +50V/V gain, SOT23-5 package footprint, buffered 2mA-output voltage interface, -40°C to +125°C automotive temperature rating, and high common-mode rejection (90dB) across 2V–28V.
Technical Context
The MAX4376FAUK-T implements a BiCMOS-based high-side sensing architecture with internal gain-setting resistors and a buffered output stage. Its input common-mode range extends down to 0V-enabling accurate current measurement during deep battery discharge-while remaining fully functional up to +28V regardless of VCC level.
It features a precision current-mirror feedback loop that converts differential sense voltage (VRS+ – VRS−) into a proportional output voltage: VOUT = 50 × RSENSE × ILOAD. The buffered output drives up to 2mA into ground-referenced loads without external gain components, eliminating resistor networks and reducing layout sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +50V/V - fixed internal gain enables direct voltage output scaling without external resistors |
| Common-Mode Input Range | 0V to +28V - supports battery monitoring down to 0V pack voltage, independent of VCC |
| Full-Scale Sense Voltage | 150mV - defines maximum measurable differential input before saturation |
| Total Output Voltage Error | ±0.5% (typ) at +25°C - ensures high-accuracy current readout for fuel gauging and charger feedback |
| Bandwidth | 1.7MHz - sufficient for closed-loop response inside battery-charger control circuits |
| Supply Current | 1mA (typ) - low quiescent draw preserves battery life in always-on monitoring applications |
| Operating Temperature | -40°C to +125°C - AEC-Q100-compatible performance for under-hood and industrial environments |
Pinout & Package
MAX4376FAUK-T is housed in a RoHS-compliant 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), optimized for space-constrained PCB layouts in portable and automotive electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified output voltage | Buffered, rail-to-rail capable output driving up to 2mA; directly interfaces ADCs or comparator inputs |
| 2 (GND) | Analog ground reference | Single ground connection for both power and signal return; must be low-impedance for accuracy |
| 3 (VCC) | Positive supply input | Accepts +3V to +28V; powers internal amplifier and bias circuitry |
| 4 (RS+) | High-side sense resistor connection | Connects to battery/DC source side of external sense resistor; withstands up to +30V absolute max |
| 5 (RS−) | Load-side sense resistor connection | Connects to load side of sense resistor; differential input referenced to RS+; ±8V max differential rating |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +50V/V gain | Eliminates external gain-setting resistors, reducing BOM count and layout sensitivity while ensuring repeatable scaling |
| 0V to +28V common-mode range | Enables accurate current sensing during battery deep-discharge states where VBAT falls below system VCC |
| ±0.5% full-scale accuracy (25°C) | Supports high-fidelity fuel gauging and overcurrent protection thresholds without calibration |
| 2mA buffered output drive | Directly drives ADC inputs or comparator stages without external buffers or level-shifting circuitry |
| AEC-Q100 qualified | Validated for automotive applications including battery management and PA bias control in harsh thermal environments |
Applications
| Battery Charger Feedback Loop | Fuel Gauging in Smart Batteries |
|---|---|
Use Scenario: Real-time current monitoring inside switching battery chargers to regulate charge rate and terminate charging. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-independent feedback to the charger controller. Use Value: Enables precise constant-current regulation and end-of-charge detection using only one external sense resistor and no gain components. | Use Scenario: Measuring bidirectional battery current in laptop or tablet smart battery packs to estimate state-of-charge. IC Role / Device Role / Timing Role: Precision analog front-end converting mΩ-level sense voltage into scalable voltage output for microcontroller ADC sampling. Use Value: Delivers ±0.5% accuracy at +25°C and stable error vs. temperature (±3.25% over -40°C to +125°C), improving SOC estimation fidelity. |
| Automotive Load Monitoring | Portable System Power Management |
Use Scenario: Monitoring current draw of infotainment modules or lighting drivers in automotive ECUs. IC Role / Device Role / Timing Role: High-voltage-tolerant current sensor interfacing between 12V/24V battery rails and low-voltage MCU subsystems. Use Value: Operates reliably across -40°C to +125°C with 90dB CMR, enabling robust diagnostics without ground-loop interference. | Use Scenario: Board-level current supervision in smartphones or wearables to detect abnormal power consumption or short-circuit events. IC Role / Device Role / Timing Role: Compact, low-power current monitor feeding real-time data to PMIC or application processor. Use Value: 1mA supply current and SOT23-5 footprint minimize impact on size and battery runtime while supporting fast 1.7MHz transient response. |
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 |
|---|---|---|---|
| MAX4376TAUK-T | +20V/V fixed gain; identical package, temp range, and accuracy spec | Suitable for higher full-scale current ranges where 100mV sense voltage yields lower output swing | Select when full-scale output must remain ≤2.0V for 100mV sense input |
| MAX4376HAUK-T | +100V/V fixed gain; same SOT23-5 package and automotive rating | Optimized for ultra-low current sensing (e.g., <1A) requiring higher output resolution per mA | Choose when sensing sub-ampere loads with 100mV full-scale and need ≥5V output swing |
Compared with MAX4376TAUK-T and MAX4376HAUK-T, the MAX4376FAUK-T provides intermediate gain (+50V/V), balancing output voltage headroom and resolution for mid-range current monitoring (e.g., 1–5A with 20–100mΩ sense resistors), making it optimal for battery charger feedback and general-purpose automotive load detection.
Availability
MAX4376FAUK-T is available at Aetrix Electronics and suitable for battery charger feedback loops, smart battery fuel gauging, and automotive load monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX4376FAUK-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, automotive, and computing applications.
The MAX4376 family delivers high-side current-sense amplifiers with integrated gain, engineered specifically for accurate, ground-independent current monitoring in battery-powered and automotive systems where supply voltage may fall below sensed rail voltage.
FAQ
What is the gain setting of MAX4376FAUK-T?
The MAX4376FAUK-T has a fixed internal gain of +50V/V, as indicated by the "F" suffix in its part number. This eliminates the need for external gain-setting resistors and ensures consistent scaling of the sense voltage (VRS+ – VRS−) to output voltage: VOUT = 50 × RSENSE × ILOAD. The MAX4376FAUK-T maintains this gain across its full operating temperature range (-40°C to +125°C) with ±0.5% typical accuracy at +25°C.
Does MAX4376FAUK-T support operation with 0V common-mode input?
Yes, the MAX4376FAUK-T supports a common-mode input range from 0V to +28V, independent of supply voltage. This allows accurate current sensing even when the battery pack voltage drops to 0V during deep discharge-critical for fuel gauging and end-of-life detection. The device remains functional and maintains specified accuracy down to 0V, though highest precision is guaranteed above +2V per datasheet characterization.
What package type does MAX4376FAUK-T use?
The MAX4376FAUK-T uses a 5-pin SOT23 package (outline number 21-0057, land pattern 90-0174), with RoHS-compliant lead-free finish denoted by the "+T" suffix. Its compact footprint (approx. 2.9mm × 1.6mm) suits space-constrained designs in portable electronics and automotive modules, and it features thermal resistance θJA = 255.9°C/W on a multi-layer board.
Can MAX4376FAUK-T drive an ADC input directly?
Yes, the MAX4376FAUK-T features a buffered voltage output capable of sourcing/sinking up to 2mA, allowing direct connection to most SAR and delta-sigma ADC inputs without external buffering. Its output voltage swing is rail-to-rail compatible within specification limits (e.g., VOUT(HI) = VCC – 0.9V min at 2mA load), and its low output impedance (<5Ω) minimizes settling errors during ADC sampling.
Is MAX4376FAUK-T qualified for automotive applications?
Yes, the MAX4376FAUK-T is AEC-Q100 qualified and rated for the full automotive temperature range of -40°C to +125°C. It meets stringent reliability and stress-test requirements for automotive electronics, including thermal cycling, humidity testing, and ESD robustness. Its 0–28V common-mode range and high CMR (90dB) make it suitable for under-hood current monitoring and battery management systems.
MAX4376FAUK-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:
- 500 kHz
- Current - Input Bias:
- -
- 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
MAX4376FAUK-T FAQ
1.How can I place an order for MAX4376FAUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4376FAUK-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 MAX4376FAUK-T reliable?
The price and inventory of MAX4376FAUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4376FAUK-T is usually 5 days.
3.What payment methods are accepted for MAX4376FAUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4376FAUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4376FAUK-T?
MAX4376FAUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4376FAUK-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 MAX4376FAUK-T?
For technical support, including MAX4376FAUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4376FAUK-T requirements.
6.How does Aetrix verify that MAX4376FAUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4376FAUK-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 MAX4376FAUK-T meets industry standards.
7.What is the process for return or replacement of MAX4376FAUK-T?
All MAX4376FAUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4376FAUK-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 MAX4376FAUK-T part is unused and in its original packaging.
Return procedure for MAX4376FAUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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