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Analog Devices Inc./Maxim Integrated MAX4378HASD+T
- Part No.:
- MAX4378HASD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4378HASD+T.pdf
- Description:
- IC CURR SENSE 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,955
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Product details
Overview
MAX4378HASD+T from Maxim Integrated is a quad-channel, high-side current-sense amplifier with fixed +100V/V gain, 0V to +28V input common-mode range independent of supply voltage, ±0.5% typical full-scale accuracy at +25°C, 1.2MHz bandwidth, and automotive-grade operation from −40°C to +125°C. It enables precise battery-current monitoring in notebook computers, smart battery packs, and automotive power management systems.
For engineers reviewing the MAX4378HASD+T datasheet, MAX4378HASD+T pinout, MAX4378HASD+T application, or MAX4378HASD+T equivalent, key selection criteria include its quad-channel configuration, +100V/V internal gain, 14-pin SOIC package, buffered 2mA-output capability, and AEC-Q100-compliant performance across extended temperature and supply voltage (3V–28V) ranges.
Technical Context
The MAX4378HASD+T implements a precision high-side sensing architecture using an internal current-mirror-based amplifier topology that delivers output voltage VOUT = 100 × RSENSE × ILOAD. Its input common-mode range remains fully functional down to 0V - critical for deep-discharge battery monitoring - and is decoupled from VCC, enabling operation even when sensed voltage exceeds supply.
Each of its four channels features buffered voltage output driving up to 2mA into ground-referenced loads, 1mA typical supply current per channel, and 1.2MHz small-signal bandwidth at +100V/V gain. The device supports bidirectional current sensing in fuel-gauge applications via external circuit configuration and maintains ±0.5% gain accuracy over temperature and supply variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - sets full-scale output to 10V for 100mV sense voltage; eliminates need for external gain resistors. |
| Input Common-Mode Range | 0V to +28V - enables direct connection to battery terminals during deep discharge without ground-path interference. |
| Full-Scale Sense Voltage | 150mV - defines maximum differential input before saturation; supports accurate low-current measurement with appropriate RSENSE. |
| Bandwidth | 1.2MHz at +100V/V - sufficient for real-time response inside battery-charger control loops and fast transient detection. |
| Supply Voltage Range | +3V to +28V - allows single-supply operation across wide system rail voltages including 12V automotive and 19V laptop adapters. |
| Total Output Voltage Error | ±0.5% (typ) at +25°C - ensures high-accuracy current reconstruction without calibration in most embedded applications. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial, and high-reliability portable electronics use. |
Pinout & Package
The MAX4378HASD+T is housed in a 14-pin SOIC package (package code S14+1, outline 21-0041), RoHS-compliant, with standard 1.27mm pitch and 8.65mm × 3.91mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT / OUT_ | Buffered voltage output per channel; proportional to (RS+ − RS−); drives up to 2mA into ground-referenced load. |
| 2, 6, 9, 13 | RS− / RS_− | Load-side terminal of external sense resistor; connects to load/battery negative side for high-side sensing. |
| 3, 5, 10, 12 | RS+ / RS_+ | Power-source side of external sense resistor; connects to battery/DC source positive terminal. |
| 4 | VCC | Positive supply input for all four amplifiers; operates from +3V to +28V; powers internal bias and output stage. |
| 11 | GND | Analog ground reference for all channels; must be connected to system ground plane for accurate common-mode rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel integration | Four independent high-side current-sense amplifiers in one 14-pin SOIC - reduces BOM count and PCB area vs. discrete solutions. |
| +100V/V fixed gain | Eliminates external gain-setting resistors and associated layout sensitivity; simplifies design and improves long-term stability. |
| 0V to +28V common-mode range | Enables monitoring of battery current even at near-zero cell voltage - essential for accurate fuel gauging and end-of-life detection. |
| Buffered 2mA output drive | Directly interfaces with ADC inputs, microcontroller GPIOs, or comparator thresholds without external buffering stages. |
| AEC-Q100 qualification | Validated for automotive applications including body control modules, battery management systems, and ADAS power rails. |
Applications
| Notebook Battery Fuel Gauge | Automotive Body Control Module |
|---|---|
|
Use Scenario: Real-time bidirectional current monitoring of Li-ion battery pack during charge/discharge cycles in ultrabooks. IC Role / Device Role / Timing Role: Quad-channel high-side current-sense amplifier providing four independent analog outputs for simultaneous monitoring of main battery, USB-C PD port, display backlight, and SSD power rail. Use Value: Enables <1% state-of-charge error over lifetime via ±0.5% full-scale accuracy and 0V–28V common-mode support through full battery discharge curve. |
Use Scenario: Load-current supervision for door-lock actuators, HVAC blowers, and lighting drivers in modern vehicle body control units. IC Role / Device Role / Timing Role: High-side current sensor detecting overcurrent, open-load, and short-circuit faults across multiple 12V subsystems with fast 1.2MHz response. Use Value: Supports AEC-Q100 compliance and fault logging at −40°C to +125°C; eliminates ground-loop interference in distributed chassis-ground architectures. |
| Industrial Power Supply Monitoring | Smartphone Fast-Charging System |
|
Use Scenario: Precision current feedback in programmable DC power supplies delivering 0–30V/0–10A with digital control loop. IC Role / Device Role / Timing Role: Four-channel current monitor feeding isolated ADCs for real-time load profiling, thermal derating, and dynamic current limiting. Use Value: 1.2MHz bandwidth and 400ns setting time enable closed-loop response within charger control bandwidth; 3V–28V supply range matches auxiliary rails. |
Use Scenario: Dual-path current sensing in dual-battery smartphone architectures supporting 100W+ fast charging with adaptive voltage partitioning. IC Role / Device Role / Timing Role: Simultaneous monitoring of adapter input current, battery charge current, and system load current using three of four channels. Use Value: +100V/V gain provides 10V full-scale output for 100mV sense drop - maximizes ADC resolution while minimizing I²R loss in compact PCB layouts. |
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 |
|---|---|---|---|
| MAX4378FASD+ | +50V/V gain (vs. +100V/V); identical pinout, package, and temperature rating. | Better suited for higher-current applications where 100mV sense voltage yields >5V output - avoids ADC saturation with lower RSENSE values. | Select MAX4378FASD+ when full-scale load current exceeds 5A and system ADC input range is ≤5V. |
| INA226AIDGST | I²C digital output, 16-bit resolution, integrated shunt and temp sensor; 2.7V–5.5V supply only; no 0V–28V common-mode support. | Requires microcontroller interface and firmware; unsuitable for analog-loop or high-voltage (>5.5V) applications. | Choose INA226AIDGST only for digitally managed, low-voltage (<5.5V) systems needing high-resolution energy accumulation. |
Compared with MAX4378FASD+ and INA226AIDGST, the MAX4378HASD+T delivers highest analog gain and widest common-mode range in a pin-compatible SOIC package - making it optimal for analog-intensive, high-voltage, automotive-qualified current monitoring where simplicity and signal integrity are critical.
Availability
MAX4378HASD+T is available at Aetrix Electronics and suitable for notebook battery fuel gauges, automotive body control modules, and industrial power supply monitoring requiring stable component supply, long lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX4378HASD+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 MAX4378 series belongs to Maxim's high-side current-sense amplifier product line, engineered specifically for accurate, ground-independent current monitoring in battery-powered and automotive systems with wide input voltage tolerance.
FAQ
What is the supply voltage range supported by the MAX4378HASD+T?
The MAX4378HASD+T operates from +3V to +28V on its VCC pin. This wide range allows direct compatibility with 3.3V microcontrollers, 5V logic rails, 12V automotive systems, and 19–24V laptop adapters - all without external regulators or level-shifting circuitry. The device maintains full specification compliance across this entire range.
Does the MAX4378HASD+T support bidirectional current sensing?
The MAX4378HASD+T itself is unidirectional - it measures current flowing from RS+ to RS−. However, it can be used in bidirectional configurations when paired with external circuitry such as an op-amp summing stage or multiplexer, as documented in Maxim's Application Note for fuel-gauge implementations. The device's 0V–28V common-mode range enables reliable operation regardless of polarity reversal in such setups.
What is the meaning of the "H" suffix in MAX4378HASD+T?
The "H" in MAX4378HASD+T denotes the +100V/V fixed gain version of the MAX4378 quad amplifier. This is confirmed in Maxim's ordering information table and electrical characteristics section. Other variants include "T" for +20V/V and "F" for +50V/V - all sharing identical pinout, package, and temperature specifications.
Can the MAX4378HASD+T be used in automotive applications?
Yes - the MAX4378HASD+T is AEC-Q100 qualified and specified for operation from −40°C to +125°C. Its 0V–28V input common-mode range, 1mA per channel supply current, and robust ESD tolerance make it suitable for automotive body control modules, battery management systems, and infotainment power monitoring where high-side sensing without ground disruption is required.
What is the maximum capacitive load the MAX4378HASD+T output can drive?
The MAX4378HASD+T output is stable with up to 1000pF of capacitive load, as specified in the Electrical Characteristics table. This allows direct connection to sampling capacitors in SAR ADCs or filtering networks without external isolation resistors - provided layout minimizes parasitic inductance and the load remains within this limit to avoid peaking or oscillation.
MAX4378HASD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2 MHz
- Current - Input Bias:
- 120 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 1mA (x4 Channels)
- 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:
- 14-SOIC
MAX4378HASD+T FAQ
1.How can I place an order for MAX4378HASD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4378HASD+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 MAX4378HASD+T reliable?
The price and inventory of MAX4378HASD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4378HASD+T is usually 5 days.
3.What payment methods are accepted for MAX4378HASD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4378HASD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4378HASD+T?
MAX4378HASD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4378HASD+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 MAX4378HASD+T?
For technical support, including MAX4378HASD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4378HASD+T requirements.
6.How does Aetrix verify that MAX4378HASD+T is sourced from the original manufacturer or authorized distributors?
All MAX4378HASD+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 MAX4378HASD+T meets industry standards.
7.What is the process for return or replacement of MAX4378HASD+T?
All MAX4378HASD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4378HASD+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 MAX4378HASD+T part is unused and in its original packaging.
Return procedure for MAX4378HASD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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