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Analog Devices Inc./Maxim Integrated MAX4376FASA+
- Part No.:
- MAX4376FASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4376FASA+.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:422
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Product details
Overview
MAX4376FASA+ from Maxim Integrated is a single-channel, high-side current-sense amplifier with fixed +50V/V gain, 0V to +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 feedback loops and precision fuel gauging in portable systems.
For engineers reviewing the MAX4376FASA+ datasheet, MAX4376FASA+ pinout, MAX4376FASA+ application, or MAX4376FASA+ equivalent, key selection criteria include its fixed +50V/V gain, SOT23-5 vs. SO-8 package variants, automotive-grade -40°C to +125°C operation, buffered 2mA-output voltage interface, and high common-mode rejection (90dB) for accurate sensing in noisy, high-voltage battery paths.
Technical Context
The MAX4376FASA+ implements a precision high-side current-sense architecture using an internal current-mirror-based amplifier with fixed +50V/V gain. Its input common-mode range (0V to +28V) remains fully functional even when VRS+ falls below VCC - enabling reliable monitoring during deep battery discharge without ground-path interference.
It delivers buffered voltage output capable of driving up to 2mA into a ground-referenced load, with 1.7MHz small-signal bandwidth (gain = +50V/V), 400ns output settling time to 1%, and ±0.5% gain accuracy over temperature - making it suitable for closed-loop battery-charger control where fast, stable current feedback is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +50V/V - fixed internal gain eliminates external resistor network; sets output voltage as VOUT = 50 × (ILOAD × RSENSE). |
| Input Common-Mode Range | 0V to +28V - operates independently of VCC; enables sensing on battery anode side even at near-zero cell voltage. |
| Full-Scale Sense Voltage | 150mV - maximum differential input before saturation; defines minimum RSENSE for target ILOAD (e.g., 10A → RSENSE = 15mΩ). |
| Supply Voltage Range | +3V to +28V - supports wide-input power rails including 12V/24V automotive and multi-cell Li-ion systems. |
| Bandwidth | 1.7MHz - sufficient for real-time response inside switching charger control loops (e.g., MAX1745-based designs). |
| Total Output Voltage Error | ±0.5% (typ, +25°C) - ensures <±10mV error at 2V full-scale output; critical for fuel-gauge accuracy and charge termination. |
| Supply Current | 1mA (typ) - low quiescent draw preserves battery life in always-on monitoring applications like smart battery packs. |
Pinout & Package
MAX4376FASA+ is housed in an 8-pin SOIC (SO-8) package with standard 150mil width and RoHS-compliant lead-free finish. Pin assignments are validated per Maxim's official pin configuration diagram and ordering information table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | OUT | Buffered voltage output proportional to sensed current; drives up to 2mA into ground-referenced A/D or controller input. |
| 2 | GND | Analog ground reference; must be connected directly to system ground plane to minimize offset error and noise coupling. |
| 3, 5 | VCC | Positive supply input; accepts +3V to +28V; powers internal amplifier and buffer; decoupling capacitor required at pin. |
| 4 | RS+ | High-side connection to external sense resistor; tied to battery anode or power rail upstream of load. |
| 6 | RS- | Load-side connection to external sense resistor; returns to load cathode; forms differential input pair with RS+. |
| 8 | N.C. | No internal connection; left unconnected; not used for signal or thermal relief in SO-8 layout. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +50V/V Gain | Eliminates gain-setting resistors and associated layout sensitivity; reduces BOM count and improves production consistency. |
| 0V to +28V Common-Mode Range | Enables uninterrupted current monitoring during battery deep-discharge (e.g., down to 0.5V per cell) without signal loss. |
| ±0.5% Full-Scale Accuracy (T = +25°C) | Supports sub-1% state-of-charge resolution in fuel-gauge implementations using 12-bit ADCs with 2V full-scale range. |
| 2mA Buffered Output Drive | Directly interfaces with standard SAR or sigma-delta ADC inputs without external op-amp buffering or level-shifting. |
| AEC-Q100 Qualified Option Available | Variant MAX4376FASA/V+ is automotive-qualified; MAX4376FASA+ shares identical electrical specs and SO-8 footprint. |
Applications
| Battery Charger Feedback Loop | Fuel Gauge in Notebook Computers |
|---|---|
Use Scenario: Real-time current measurement inside constant-current/constant-voltage (CC/CV) Li-ion battery charging circuitry. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing analog feedback to charger IC (e.g., MAX1745) for precise current regulation. Use Value: 1.7MHz bandwidth and 400ns settling enable tight control loop stability; ±0.5% accuracy ensures <±50mA error at 10A charge current. |
Use Scenario: Monitoring bidirectional battery pack current in Windows-based ultrabooks to compute remaining capacity and health. IC Role / Device Role / Timing Role: Precision analog front-end converting mΩ-level sense voltage into stable, noise-immune voltage for system microcontroller ADC. Use Value: 0V–28V common-mode range maintains accuracy across full battery discharge curve; buffered output rejects PCB trace impedance effects. |
| Automotive Body Control Module (BCM) | Current-Limited Power Supply Monitor |
Use Scenario: Detecting overcurrent events in 12V/24V automotive loads such as seat heaters, window lifts, or lighting drivers. IC Role / Device Role / Timing Role: High-side current monitor feeding fault signal to MCU or dedicated protection ASIC for fast shutdown (<1ms response). Use Value: -40°C to +125°C operation meets AEC-Q100 ambient requirements; 90dB CMR suppresses alternator ripple and ignition noise. |
Use Scenario: Verifying compliance with programmable current limits in industrial DC-DC modules (e.g., 5V/3A USB-PD sink or FPGA power rail). IC Role / Device Role / Timing Role: Analog current verification stage placed after DC-DC converter output to validate load current against setpoint. Use Value: Fixed +50V/V gain simplifies calibration; 1mA supply current minimizes self-heating drift in sealed enclosures. |
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, same SO-8 package, but wider 4.5V–76V supply range and higher 2.5MHz bandwidth; ±0.75% gain error over temp. | Better suited for 48V telecom or industrial systems; less optimal for low-VCC (3V) battery-powered designs due to higher min supply. | Select MAX4080FASA+ only if operating above 28V or requiring >2MHz bandwidth; otherwise MAX4376FASA+ offers tighter accuracy at lower VCC. |
| INA240A1DR | +20V/V fixed gain (A1 variant), SO-8, 2.5V–80V supply, ±0.2% max gain error, but requires external gain-resistor network for +50V/V scaling. | Requires additional precision resistor and layout area; higher design complexity for same gain; superior accuracy only with calibrated resistor. | Choose INA240A1DR if absolute lowest gain error is mandatory and board space allows external resistor; MAX4376FASA+ provides simpler, integrated +50V/V solution. |
Compared with MAX4080FASA+, MAX4376FASA+ trades higher supply-voltage headroom for tighter +25°C gain accuracy and lower minimum supply (3V vs. 4.5V); versus INA240A1DR, it delivers identical +50V/V functionality without external components - reducing risk of resistor tolerance drift and layout-induced errors.
Availability
MAX4376FASA+ is available at Aetrix Electronics and suitable for notebook computers, battery chargers, and automotive current detect applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4376FASA+ 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 precision analog, mixed-signal, and power-management ICs for industrial, automotive, and computing markets.
The MAX4376 family was designed specifically for high-accuracy, high-common-mode, high-side current sensing in space-constrained, battery-critical systems - emphasizing integration, temperature stability, and ease of use over discrete solutions.
FAQ
What is the supply voltage range for MAX4376FASA+?
The MAX4376FASA+ operates from +3V to +28V supply voltage. This range supports both low-voltage portable systems (e.g., 3.3V logic domains) and higher-voltage applications such as 12V/24V automotive or industrial power rails. Operation below +3V is not guaranteed, and exceeding +28V violates absolute maximum ratings.
Does MAX4376FASA+ support bidirectional current sensing?
No, MAX4376FASA+ is a unidirectional high-side current-sense amplifier optimized for positive current flow from RS+ to RS-. It does not provide polarity reversal or negative output swing. For bidirectional applications (e.g., smart battery charge/discharge monitoring), the dual-channel MAX4377FAUA+ or dedicated bidirectional amplifiers like MAX4081 should be used instead.
What is the meaning of the 'F' suffix in MAX4376FASA+?
The 'F' in MAX4376FASA+ denotes the fixed +50V/V gain version of the MAX4376 family. Per Maxim's ordering guide, 'T' = +20V/V, 'F' = +50V/V, and 'H' = +100V/V. This suffix is part of the official device identity and determines the internal gain-setting network - no external resistors are needed to achieve this gain.
Can MAX4376FASA+ be used with a 0V common-mode input voltage?
Yes, MAX4376FASA+ maintains functional operation down to 0V common-mode input (VRS+ = 0V), as confirmed in its Electrical Characteristics table and Absolute Maximum Ratings. This capability is essential for monitoring deeply discharged batteries where the anode voltage approaches ground - and is independent of the VCC supply level.
What package type is used for MAX4376FASA+?
MAX4376FASA+ uses an 8-pin SOIC (SO-8) package with 150mil width and RoHS-compliant lead-free finish. It is distinct from the SOT23-5 variant (e.g., MAX4376FAUK+T) and shares pinout compatibility with other SO-8 versions of the MAX4376 family, including the +20V/V and +100V/V gain options.
MAX4376FASA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.7 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:
- 8-SOIC
MAX4376FASA+ FAQ
1.How can I place an order for MAX4376FASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4376FASA+ 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 MAX4376FASA+ reliable?
The price and inventory of MAX4376FASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4376FASA+ is usually 5 days.
3.What payment methods are accepted for MAX4376FASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4376FASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4376FASA+?
MAX4376FASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4376FASA+ 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 MAX4376FASA+?
For technical support, including MAX4376FASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4376FASA+ requirements.
6.How does Aetrix verify that MAX4376FASA+ is sourced from the original manufacturer or authorized distributors?
All MAX4376FASA+ 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 MAX4376FASA+ meets industry standards.
7.What is the process for return or replacement of MAX4376FASA+?
All MAX4376FASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4376FASA+, 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 MAX4376FASA+ part is unused and in its original packaging.
Return procedure for MAX4376FASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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