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Analog Devices Inc./Maxim Integrated MAX4376FAUK+TG103
- Part No.:
- MAX4376FAUK+TG103
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4376FAUK+TG103.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,756
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Product details
Overview
MAX4376FAUK+TG103 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 (gain = +50V/V). It operates from +3V to +28V supply, draws 1mA typical supply current, and supports automotive temperature range (−40°C to +125°C), targeting battery-charger feedback loops and notebook power monitoring.
For engineers reviewing the MAX4376FAUK+TG103 datasheet, MAX4376FAUK+TG103 pinout, MAX4376FAUK+TG103 application, or MAX4376FAUK+TG103 equivalent, key selection criteria include guaranteed ±0.5% gain accuracy over temperature, buffered 2mA-output voltage interface, SOT23-5 package compatibility with space-constrained PCB layouts, and AEC-Q100-compliant variants for automotive current detection.
Technical Context
The MAX4376FAUK+TG103 implements a precision high-side sensing architecture using internal current-mirror gain scaling and buffered output stage, enabling accurate current measurement without ground-path interference. Its input common-mode range extends down to 0V-critical for deep-discharge battery monitoring-and remains fully functional even when VRS+ exceeds VCC.
It features a 2mA buffered output capable of driving ground-referenced loads directly, eliminating external op-amp buffering. The device's 1.7MHz small-signal bandwidth and 1µs saturation recovery time support dynamic response in closed-loop battery charger control systems operating up to 28V supply and 28V sense node voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +50V/V - fixed internal gain enables direct voltage output proportional to sensed current without external resistors |
| Input Common-Mode Range | 0V to +28V - supports high-side sensing on deeply discharged batteries and systems where sense node exceeds supply voltage |
| Full-Scale Sense Voltage | 150mV - defines maximum differential input before output saturation; sets minimum RSENSE for target load current |
| Bandwidth (Gain = +50) | 1.7MHz - sufficient for real-time current feedback in switching regulator and battery-charger control loops |
| Supply Current (per amp) | 1mA typical - low quiescent draw enables use in always-on battery-powered systems without significant drain |
| Total Output Voltage Error | ±0.5% at +25°C, ±3.25% over −40°C to +125°C - ensures stable calibration across automotive thermal environments |
| Output Drive Capability | 2mA into ground-referenced load - eliminates need for external buffer stage in ADC interface applications |
Pinout & Package
The MAX4376FAUK+TG103 is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), optimized for high-density PCB layouts in portable and automotive electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Buffered output voltage | Provides gain-scaled (×50) analog voltage proportional to ILOAD; drives up to 2mA into ground-referenced loads |
| 2 (GND) | Analog ground reference | Return path for internal circuitry and output stage; must be connected to system ground plane for accuracy |
| 3 (VCC) | Positive supply input | Accepts +3V to +28V; powers internal amplifier and current mirror; PSR > 66dB reduces supply noise coupling |
| 4 (RS+) | High-side sense resistor connection | Connects to battery or power rail 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 accepts up to ±8V; enables bidirectional sensing with external circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +50V/V gain | Eliminates gain-setting resistors and layout sensitivity; simplifies BOM and improves production consistency |
| 0V to +28V common-mode range | Enables reliable current monitoring during battery deep discharge (<1V) and high-voltage industrial rails |
| ±0.5% full-scale accuracy at +25°C | Reduces calibration overhead in fuel gauge and smart battery applications requiring <1% SOC error |
| Buffered 2mA output | Directly interfaces with 12-bit SAR ADCs (e.g., MAX11100) without external op-amp, saving board area and power |
| AEC-Q100 qualified variants available | Supports automotive current detection in ADAS power domains and EV battery management subsystems |
Applications
| Battery Charger Feedback Loop | Notebook Computer Power Monitoring |
|---|---|
|
Use Scenario: Real-time current feedback inside constant-current/constant-voltage (CC/CV) battery charging circuits for Li-ion packs. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog voltage output to charger controller's error amplifier input. Use Value: Enables precise charge termination and thermal derating via 1.7MHz bandwidth and ±0.5% gain stability across −40°C to +125°C. |
Use Scenario: System-level power rail current monitoring in ultrabook mainboards and docking stations. IC Role / Device Role / Timing Role: Single-channel high-side sensor converting load current into buffered voltage for PMIC telemetry and OS-level power budgeting. Use Value: Delivers 2mA drive capability and 0–28V common-mode range to monitor 5V/12V/19V rails without ground disruption or level-shifting. |
| Automotive Current Detection | Smart Battery Fuel Gauge |
|
Use Scenario: In-vehicle DC-DC converter output current monitoring for OBD-II diagnostics and load shedding decisions. IC Role / Device Role / Timing Role: AEC-Q100-compliant high-side amplifier feeding analog input of microcontroller ADC for real-time current logging. Use Value: Guarantees ±3.25% total output error over full automotive temperature range, supporting ASIL-B–aligned functional safety requirements. |
Use Scenario: Bidirectional current sensing in laptop smart battery packs to track charge/discharge cycles for state-of-charge (SOC) estimation. IC Role / Device Role / Timing Role: Precision current transducer interfacing with fuel-gauge IC (e.g., MAX17048) via buffered analog output. Use Value: Achieves <1% full-scale error at room temperature and maintains accuracy down to 0V common-mode, critical for end-of-discharge tracking. |
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, same SOT23-5 package, identical temperature range and supply specs | Lower gain requires larger RSENSE for same output swing; better suited for high-current (>5A), low-accuracy monitoring | Select when full-scale output must remain ≤2.0V at 100mV sense voltage; trades resolution for reduced I²R loss in sense resistor |
| MAX4376HAUK+T | +100V/V fixed gain, same package and thermal specs, 1.2MHz bandwidth (vs. 1.7MHz) | Higher gain enables sub-100mA current resolution with standard 10mΩ sense resistors; bandwidth reduction limits loop speed | Choose for ultra-low-current applications (e.g., standby leakage monitoring) where 1.2MHz suffices and higher output voltage swing is acceptable |
Compared with MAX4376FAUK+TG103, the +20V/V variant offers lower gain and wider bandwidth margin for aggressive control loops, while the +100V/V version delivers finer current resolution at the cost of reduced small-signal bandwidth-enabling tailored trade-offs between sensitivity, power loss, and dynamic response.
Availability
MAX4376FAUK+TG103 is available at Aetrix Electronics and suitable for battery chargers, notebook computer power management, and automotive current detection requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned qualification.
Supply support for MAX4376FAUK+TG103 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, sensing, and communication applications, with emphasis on high-reliability, low-power, and automotive-grade solutions.
The MAX4376 family was developed specifically for high-side current sensing in space-constrained, battery-critical systems-including notebook computers, smart batteries, and automotive power modules-where ground-path integrity and wide common-mode operation are mandatory.
FAQ
What is the gain setting of the MAX4376FAUK+TG103?
The MAX4376FAUK+TG103 has a fixed internal gain of +50V/V, as indicated by the "F" suffix in its part number. This gain is factory-trimmed and does not require external resistors. It provides a buffered output voltage equal to 50 × (VRS+ − VRS−), enabling direct interface with ADCs or control inputs without gain-setting components. The MAX4376FAUK+TG103 maintains ±0.5% gain accuracy at +25°C and ±3.25% over the full −40°C to +125°C range.
Does the MAX4376FAUK+TG103 support bidirectional current sensing?
The MAX4376FAUK+TG103 is a unidirectional high-side current-sense amplifier optimized for positive current flow from RS+ to RS−. While its input stage tolerates differential voltages down to −8V (allowing limited reverse-sense capability), it lacks internal phase-reversal protection or dual-polarity output scaling. For true bidirectional applications-such as smart battery fuel gauges-the MAX4377 dual-channel variant or dedicated bidirectional amplifiers like the MAX40056 are recommended. The MAX4376FAUK+TG103 is not specified for continuous reverse-current operation.
What is the maximum common-mode voltage the MAX4376FAUK+TG103 can handle?
The MAX4376FAUK+TG103 supports an input common-mode voltage range of 0V to +28V, independent of supply voltage (VCC). This means it remains fully functional even when VRS+ is at 0V (deep battery discharge) or exceeds VCC-for example, VRS+ = 24V with VCC = 5V. Absolute maximum ratings allow VRS+ up to +30V, but operation beyond +28V is not guaranteed per specification. The MAX4376FAUK+TG103 achieves this via proprietary BiCMOS input architecture.
Can the MAX4376FAUK+TG103 drive an ADC directly?
Yes, the MAX4376FAUK+TG103 features a buffered output capable of sourcing/sinking up to 2mA into a ground-referenced load, making it compatible with most 12-bit SAR and delta-sigma ADCs without external buffering. Its low output impedance (~5Ω) and 1.7MHz bandwidth ensure minimal settling error for sampling rates up to 100kSPS. For optimal performance, place a 0.1µF decoupling capacitor close to the OUT pin and route the output trace away from noisy digital lines. The MAX4376FAUK+TG103's ±0.5% full-scale accuracy directly translates to ADC input fidelity.
Is the MAX4376FAUK+TG103 qualified for automotive applications?
The base MAX4376FAUK+TG103 is not explicitly AEC-Q100 qualified; however, Maxim offers automotive-grade variants such as MAX4376FAUK/V+T (same +50V/V gain, SOT23-5, −40°C to +125°C) that meet AEC-Q100 Grade 2 requirements. These /V parts undergo additional stress testing and lot traceability per automotive standards. If your design targets automotive ECUs or battery management systems, specify the /V suffix variant. The MAX4376FAUK+TG103 shares identical electrical specs and pinout with /V versions but lacks formal automotive qualification documentation.
MAX4376FAUK+TG103 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2 MHz
- Current - Input Bias:
- 120 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
MAX4376FAUK+TG103 FAQ
1.How can I place an order for MAX4376FAUK+TG103 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4376FAUK+TG103 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+TG103 reliable?
The price and inventory of MAX4376FAUK+TG103 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4376FAUK+TG103 is usually 5 days.
3.What payment methods are accepted for MAX4376FAUK+TG103?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4376FAUK+TG103 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4376FAUK+TG103?
MAX4376FAUK+TG103 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4376FAUK+TG103 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+TG103?
For technical support, including MAX4376FAUK+TG103 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4376FAUK+TG103 requirements.
6.How does Aetrix verify that MAX4376FAUK+TG103 is sourced from the original manufacturer or authorized distributors?
All MAX4376FAUK+TG103 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+TG103 meets industry standards.
7.What is the process for return or replacement of MAX4376FAUK+TG103?
All MAX4376FAUK+TG103 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4376FAUK+TG103, 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+TG103 part is unused and in its original packaging.
Return procedure for MAX4376FAUK+TG103:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4376FAUK+TG103 Tags
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