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Analog Devices Inc./Maxim Integrated MAX4378HAUD+
- Part No.:
- MAX4378HAUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4378HAUD+.pdf
- Description:
- IC CURR SENSE 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:137
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Product details
Overview
MAX4378HAUD+ 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 operation across -40°C to +125°C for automotive battery-charger current monitoring.
For engineers reviewing the MAX4378HAUD+ datasheet, MAX4378HAUD+ pinout, MAX4378HAUD+ application, or MAX4378HAUD+ equivalent, this page delivers verified electrical parameters, TSSOP-14 package mapping, dual- and quad-channel functional context, and real-world current-sense design constraints including sense-resistor selection, output drive capability (2mA), and saturation recovery time (1µs).
Technical Context
The MAX4378HAUD+ implements a precision high-side sensing architecture using internal current-mirror gain stages and buffered voltage outputs, eliminating external gain-setting resistors. Its input stage operates with rail-to-rail common-mode tolerance down to 0V, enabling accurate current measurement during deep battery discharge without ground-path interference.
Each of its four amplifiers features independent RS+ and RS− inputs, a buffered OUT terminal capable of sourcing/sinking up to 2mA into ground-referenced loads, and a supply voltage range of +3V to +28V. Gain is fixed at +100V/V per channel, with total output voltage error bounded by ±5.5% over temperature and ±0.5% at +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - fixed internal gain; output voltage = 100 × (RS+ − RS−) sense voltage |
| Common-Mode Input Range | 0V to +28V - supports battery monitoring down to 0V pack voltage, independent of VCC |
| Bandwidth | 1.2MHz - sufficient for closed-loop control in fast-switching battery chargers |
| Supply Current per Amplifier | 1mA (typ) - enables low-power system-level current monitoring across all four channels |
| Full-Scale Sense Voltage | 150mV - defines maximum differential input before clipping; sets RSENSE selection boundary |
| Output Drive Capability | 2mA into ground-referenced load - eliminates need for external buffer in most A/D interface scenarios |
| Total Output Voltage Error | ±0.5% (typ, +25°C) - ensures high-accuracy fuel-gauge or protection-circuit feedback |
Pinout & Package
MAX4378HAUD+ is housed in a 14-pin TSSOP package (outline 21-0066, land pattern 90-0117), RoHS-compliant (+ suffix), with 0.65mm pitch and exposed pad not internally connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT1, OUT2, OUT3, OUT4 | Buffered voltage outputs proportional to respective sense voltages; each drives up to 2mA |
| 2, 6, 9, 13 | RS1−, RS2−, RS3−, RS4− | Load-side terminals of external sense resistors; referenced to load ground, not device GND |
| 3, 5, 10, 12 | RS1+, RS2+, RS3+, RS4+ | Power-source side terminals of external sense resistors; tolerate up to +28V common-mode |
| 4 | GND | Analog ground reference for internal circuitry and output stage; separate from load return path |
| 11 | VCC | Single supply input: +3V to +28V; powers all four amplifiers and output buffers |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +100V/V gain | Eliminates external gain resistors and layout sensitivity; simplifies BOM and improves thermal stability |
| 0V to +28V common-mode range | Enables direct connection to battery anode during deep discharge without signal loss or offset drift |
| ±0.5% full-scale accuracy at +25°C | Supports precise fuel gauging and overcurrent detection thresholds in smart battery systems |
| 1.2MHz bandwidth | Meets response-time requirements for real-time current limiting in switch-mode battery chargers |
| 2mA buffered output drive | Directly interfaces with 12-bit SAR ADCs or comparator inputs without external op-amp buffering |
Applications
| Battery Charger Current Monitoring | Smart Battery Fuel Gauge |
|---|---|
|
Use Scenario: Real-time current measurement in multi-phase Li-ion battery charging circuits with variable input voltage and deep-discharge operation. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-independent analog feedback to charger controller PWM logic. Use Value: Enables accurate charge termination and state-of-charge calculation despite 0–28V battery voltage swing and ±100mV full-scale sense range. |
Use Scenario: Bidirectional current tracking in laptop battery packs with integrated protection ICs and SMBus communication. IC Role / Device Role / Timing Role: Quad-channel analog front-end converting sense resistor voltage drops into stable, buffered outputs for microcontroller ADC sampling. Use Value: Four independent channels support simultaneous monitoring of charge/discharge paths and auxiliary rails, improving fuel gauge resolution and fault isolation. |
| Automotive Body Control Module | Industrial Power Supply OCP |
|
Use Scenario: Load-current supervision in 12V/24V automotive BCMs for LED lighting, window motors, and HVAC actuators. IC Role / Device Role / Timing Role: High-side current sensor feeding diagnostic logic and PWM-controlled driver stages with AEC-Q100 qualified performance. Use Value: -40°C to +125°C operation and ±5.5% total error over temperature ensure reliable short-circuit detection under engine-bay thermal stress. |
Use Scenario: Overcurrent protection in programmable DC power supplies where fast response and wide dynamic range are required. IC Role / Device Role / Timing Role: Precision current monitor generating trip signals for digital isolators or analog comparators in safety-critical feedback loops. Use Value: 1µs saturation recovery and 400ns setting time enable sub-microsecond fault response, preventing MOSFET destruction during transient overloads. |
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 |
|---|---|---|---|
| MAX4378FAUD+ | +50V/V gain (vs. +100V/V); same package, temp range, and bandwidth (1.7MHz) | Better suited for higher-current ranges where 100mV full-scale sense voltage would require impractically low RSENSE values | Select when full-scale load current exceeds 5A and thermal/power limits constrain RSENSE selection. |
| INA240A1QDGKRQ1 | AEC-Q100 Grade 1, ±20ppm/°C gain drift, 85dB CMR (vs. 90dB), 4V/V to 500V/V adjustable gain | Requires external gain resistors but offers wider gain flexibility and lower offset drift in automotive ECU designs | Choose when system-level calibration or multi-range sensing is needed, and board space allows for precision resistor placement. |
Compared with MAX4378FAUD+ and INA240A1QDGKRQ1, the MAX4378HAUD+ provides highest fixed gain for low-current precision sensing (e.g., <1A), fastest settling for 100mV step changes (400ns), and simplest layout-no external resistors-making it optimal for compact, cost-sensitive quad-channel monitoring where gain is known and fixed.
Availability
MAX4378HAUD+ is available at Aetrix Electronics and suitable for automotive battery management, notebook fuel gauging, and industrial power supply overcurrent protection requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX4378HAUD+ 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 applications.
The MAX4376/MAX4377/MAX4378 family was designed specifically for high-accuracy, high-voltage-range, high-side current sensing in space-constrained battery-powered systems-emphasizing integration, temperature stability, and ease of use without external gain components.
FAQ
What is the maximum common-mode voltage the MAX4378HAUD+ can handle?
The MAX4378HAUD+ supports a common-mode input range of 0V to +28V on its RS+ pins, fully independent of the VCC supply voltage. This allows direct connection to battery anodes even during deep discharge (e.g., 0.5V pack voltage) while maintaining valid output. Absolute maximum rating is +30V, but guaranteed operation is specified up to +28V.
Does the MAX4378HAUD+ require external gain-setting resistors?
No, the MAX4378HAUD+ does not require external gain-setting resistors. It integrates a fixed +100V/V gain stage optimized for precision high-side sensing. The gain is factory-trimmed and unalterable-this eliminates resistor matching errors, thermal drift, and PCB layout sensitivity, directly delivering VOUT = 100 × (RS+ − RS−).
What is the output drive capability of each channel in the MAX4378HAUD+?
Each of the four output channels in the MAX4378HAUD+ can source or sink up to 2mA into a ground-referenced load. This buffered output eliminates the need for external op-amp drivers when interfacing with standard 12-bit SAR ADCs or comparator inputs, reducing bill-of-materials and board area in multi-channel monitoring systems.
Is the MAX4378HAUD+ qualified for automotive applications?
The MAX4378HAUD+ is not explicitly AEC-Q100 qualified-the /V automotive-grade variants (e.g., MAX4378HAVD+) carry that qualification. However, MAX4378HAUD+ shares identical die, process (BiCMOS), and operating temperature range (-40°C to +125°C), and is widely used in automotive body electronics where full AEC-Q100 certification is not mandated by Tier-1 requirements.
How does the MAX4378HAUD+ differ from the MAX4376HAUK+?
The MAX4378HAUD+ is a quad-channel device in 14-pin TSSOP packaging, while the MAX4376HAUK+ is a single-channel version in 5-pin SOT23. Both share +100V/V gain, 0–28V common-mode range, and -40°C to +125°C operation-but MAX4378HAUD+ integrates four independent amplifiers with shared VCC and GND, enabling compact, matched-channel monitoring in battery packs or multi-rail power systems.
MAX4378HAUD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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-TSSOP
MAX4378HAUD+ FAQ
1.How can I place an order for MAX4378HAUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4378HAUD+ 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 MAX4378HAUD+ reliable?
The price and inventory of MAX4378HAUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4378HAUD+ is usually 5 days.
3.What payment methods are accepted for MAX4378HAUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4378HAUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4378HAUD+?
MAX4378HAUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4378HAUD+ 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 MAX4378HAUD+?
For technical support, including MAX4378HAUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4378HAUD+ requirements.
6.How does Aetrix verify that MAX4378HAUD+ is sourced from the original manufacturer or authorized distributors?
All MAX4378HAUD+ 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 MAX4378HAUD+ meets industry standards.
7.What is the process for return or replacement of MAX4378HAUD+?
All MAX4378HAUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4378HAUD+, 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 MAX4378HAUD+ part is unused and in its original packaging.
Return procedure for MAX4378HAUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4378HAUD+ Tags
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