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Analog Devices Inc./Maxim Integrated MAX4376FASA+T
- Part No.:
- MAX4376FASA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4376FASA+T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,440
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Product details
Overview
MAX4376FASA+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, 2.0MHz bandwidth (gain = +20V/V), and 1mA typical supply current. It enables precise battery-current monitoring in notebook computers and automotive battery chargers without disrupting ground paths.
For engineers reviewing the MAX4376FASA+T datasheet, MAX4376FASA+T pinout, MAX4376FASA+T application, or MAX4376FASA+T equivalent, key selection criteria include its fixed +50V/V gain, SOT23-5 package compatibility, high common-mode rejection (90dB), buffered 2mA-output drive capability, and operation across –40°C to +125°C for automotive-grade reliability.
Technical Context
The MAX4376FASA+T implements a BiCMOS-based high-side sensing architecture with internal gain-setting resistors and a buffered voltage output stage. Its input common-mode range (0V to +28V) remains fully functional even when VRS+ drops below 2V-though high-accuracy operation is specified above +2V-and is decoupled from VCC, enabling deep-discharge battery monitoring.
It features an internal current-mirror topology that converts sensed differential voltage (VRS+ – VRS−) into a proportional output voltage: VOUT = 50 × RSENSE × ILOAD. Output settling time is 400ns (1% final value) for step changes from 6.25mV to 100mV sense voltage, supporting use inside fast battery-charger control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +50V/V - fixed internal gain eliminates external resistor network and reduces layout sensitivity. |
| Common-Mode Input Range | 0V to +28V - supports direct connection to battery packs down to 0V, independent of VCC. |
| Full-Scale Sense Voltage | 150mV - defines maximum differential input before saturation; sets resolution limit for low-current sensing. |
| Supply Voltage Range | +3V to +28V - compatible with wide-input power rails including 12V automotive and 19V laptop systems. |
| Bandwidth | 1.7MHz (at +50V/V) - sufficient for real-time current feedback in switching regulator and charger control loops. |
| Output Drive Capability | 2mA into ground-referenced load - drives ADC inputs or comparator thresholds directly without buffer amplifiers. |
| Total Output Voltage Error | ±0.5% (typ, +25°C, VCC=12V, VRS+=12V) - ensures high-precision fuel-gauge and overcurrent-detection accuracy. |
Pinout & Package
MAX4376FASA+T is housed in an RoHS-compliant 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), optimized for space-constrained portable and automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Buffered voltage output | Delivers VOUT = 50 × (VRS+ – VRS−); capable of sourcing/sinking up to 2mA into grounded loads. |
| 2 (GND) | Analog ground reference | Return path for internal circuitry and output stage; must be connected to system analog ground plane. |
| 3 (VCC) | Positive supply input | Accepts +3V to +28V; powers internal amplifier and output buffer; PSR ≥66dB ensures noise immunity. |
| 4 (RS+) | High-side sense resistor connection | Connects to battery/DC source side of external RSENSE; withstands up to +30V absolute max. |
| 5 (RS−) | Load-side sense resistor connection | Connects to load/battery side of RSENSE; differential input accepts ±8V max; enables bidirectional sensing if used with external circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +50V/V gain | Eliminates gain-setting resistors, reducing BOM count, layout area, and gain drift due to resistor tolerance/TC. |
| 0V to +28V common-mode range | Enables accurate current measurement during battery deep discharge (<2V) without loss of functionality. |
| ±0.5% full-scale accuracy (typ, +25°C) | Supports high-fidelity fuel gauging and overcurrent protection with minimal calibration overhead. |
| 2.0MHz bandwidth at +20V/V (1.7MHz at +50V/V) | Meets dynamic response requirements for closed-loop battery charging and DC-DC converter current limiting. |
| Buffered 2mA output drive | Directly interfaces with 12-bit SAR ADCs or comparators without external op-amp buffering stages. |
| Automotive temperature range (–40°C to +125°C) | Qualified for under-hood and infotainment applications requiring AEC-Q100-level reliability. |
Applications
| Smart Battery Fuel Gauge | Battery Charger Current Monitor |
|---|---|
|
Use Scenario: Real-time tracking of charge/discharge current in lithium-ion smart battery packs for state-of-charge (SoC) estimation. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting milliohm-resistor voltage drop into precise 0–5V analog output for microcontroller ADC sampling. Use Value: Enables ±0.5% SoC accuracy over full temperature range using only one external resistor and no gain calibration. |
Use Scenario: Closed-loop current regulation in switch-mode battery chargers for notebooks and power tools. IC Role / Device Role / Timing Role: Fast-response current feedback element feeding error signal into charger controller PWM block. Use Value: 1.7MHz bandwidth and 400ns settling time allow stable 500kHz–1MHz charger loop compensation without phase lag. |
| Automotive Body Control Module (BCM) | Portable System Power Management |
|
Use Scenario: Load-current supervision of 12V accessory circuits (e.g., seat heaters, LED lighting) in automotive BCMs. IC Role / Device Role / Timing Role: High-common-mode monitor detecting overcurrent faults while rejecting battery ripple and alternator noise. Use Value: 90dB CMR and –40°C to +125°C operation ensure reliable fault detection despite harsh vehicle electrical environment. |
Use Scenario: Board-level current monitoring in handheld medical devices and industrial IoT sensors powered by LiPo batteries. IC Role / Device Role / Timing Role: Low-quiescent-current (1mA) current sensor enabling long battery life while maintaining precision during active measurement cycles. Use Value: 1mA supply current and SOT23-5 footprint minimize impact on compact PCB area and standby power budget. |
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 |
|---|---|---|---|
| INA219AIDR | I²C digital output, 16-bit ADC integrated, ±0.2% gain error, 100kHz bandwidth, 2.7–5.5V supply only. | Requires microcontroller I²C interface; unsuitable for analog feedback loops or >5.5V systems. | Select for digital BMS where firmware handles calibration and low bandwidth suffices. |
| MAX4080TASA+ | Same package (8-pin SO), +20V/V gain, 2.5MHz bandwidth, ±0.75% total error over temp, 2.7–76V supply. | Higher supply voltage range but lower gain; requires external gain resistor for scaling beyond +20V/V. | Select when wider supply range (>28V) or higher bandwidth is needed, accepting trade-off in gain flexibility. |
Compared with MAX4376FASA+T, INA219AIDR trades analog simplicity for digital integration and reduced bandwidth, while MAX4080TASA+ extends supply range and speed but sacrifices fixed-gain convenience and automotive temperature certification.
Availability
MAX4376FASA+T is available at Aetrix Electronics and suitable for notebook computer power management, automotive battery monitoring, and portable-system current-limiting applications requiring stable component supply and long-term lifecycle support.
Supply support for MAX4376FASA+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-accuracy, high-bandwidth, high-common-mode current sensing for battery-powered and automotive systems where ground-path integrity and measurement fidelity are critical.
FAQ
What is the gain setting of MAX4376FASA+T and how is it implemented?
The MAX4376FASA+T has a fixed +50V/V gain implemented via laser-trimmed internal resistors within its BiCMOS process. This eliminates external gain-setting components, reduces layout sensitivity to parasitic capacitance, and ensures ±0.5% gain accuracy at +25°C. The 'F' suffix in the part number explicitly denotes the +50V/V variant, and this gain is not user-adjustable.
Can MAX4376FASA+T operate with a 2.5V supply voltage?
No. MAX4376FASA+T requires a minimum supply voltage of +3.0V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below +3V is not guaranteed and may result in undefined output behavior or failure to meet specified accuracy, bandwidth, or common-mode range performance.
Does MAX4376FASA+T support bidirectional current sensing?
MAX4376FASA+T is a unidirectional high-side amplifier optimized for current flow from RS+ to RS−. While its input stage tolerates negative differential voltage (–8V), the output does not swing below ground and lacks built-in level-shifting for true bidirectional output. For bidirectional applications like smart battery fuel gauges, the MAX4377 dual version or external circuitry is required.
What is the maximum capacitive load MAX4376FASA+T can drive without oscillation?
MAX4376FASA+T is stable with up to 1000pF of capacitive load at its output, as confirmed in the Electrical Characteristics table. Driving larger loads risks peaking or sustained oscillation; for loads exceeding 1000pF, a series resistor (e.g., 10–50Ω) between OUT and the capacitor is recommended to maintain stability.
Is MAX4376FASA+T qualified for automotive applications?
Yes. MAX4376FASA+T operates across the full automotive temperature range (–40°C to +125°C) and is listed in Maxim's AEC-Q100 qualified parts documentation. Its 0–28V common-mode range, high CMR (90dB), and robust ESD tolerance make it suitable for battery monitoring and body control modules in passenger vehicles.
MAX4376FASA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 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+T FAQ
1.How can I place an order for MAX4376FASA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4376FASA+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 MAX4376FASA+T reliable?
The price and inventory of MAX4376FASA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4376FASA+T is usually 5 days.
3.What payment methods are accepted for MAX4376FASA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4376FASA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4376FASA+T?
MAX4376FASA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4376FASA+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 MAX4376FASA+T?
For technical support, including MAX4376FASA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4376FASA+T requirements.
6.How does Aetrix verify that MAX4376FASA+T is sourced from the original manufacturer or authorized distributors?
All MAX4376FASA+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 MAX4376FASA+T meets industry standards.
7.What is the process for return or replacement of MAX4376FASA+T?
All MAX4376FASA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4376FASA+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 MAX4376FASA+T part is unused and in its original packaging.
Return procedure for MAX4376FASA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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