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Analog Devices Inc./Maxim Integrated MAX4378HAUD+T
- Part No.:
- MAX4378HAUD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4378HAUD+T.pdf
- Description:
- IC CURR SENSE 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
MAX4378HAUD+T from Maxim Integrated is a quad-channel, high-side current-sense amplifier with fixed +100V/V gain, 0–28V input common-mode range independent of supply voltage, ±0.5% typical full-scale accuracy at +25°C, and operation over –40°C to +125°C. It enables precise battery-current monitoring in automotive power management systems without disrupting ground paths.
For engineers reviewing the MAX4378HAUD+T datasheet, MAX4378HAUD+T pinout, MAX4378HAUD+T application, or MAX4378HAUD+T equivalent, key selection criteria include guaranteed AEC-Q100 qualification, buffered 2mA output drive capability, 1.2MHz bandwidth at G=100, internal gain eliminating external resistors, and TSSOP-14 packaging for board-level current sensing in space-constrained automotive ECUs.
Technical Context
The MAX4378HAUD+T implements a BiCMOS-based high-side sensing architecture with an internal current-mirror gain stage, enabling accurate amplification of differential sense voltage (VRS+ – VRS−) across an external shunt resistor. Its input common-mode range remains functional down to 0V - critical for deep-discharge battery monitoring - and is fully decoupled from VCC (3V–28V).
Each of its four channels delivers a buffered voltage output referenced to ground, supporting direct interface with ADCs or comparator inputs. The device features 1mA typical supply current per channel, 2.0µs power-up time, and stable operation with up to 1000pF capacitive load - making it suitable for integration into fast-response battery-charger control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - sets full-scale output = 10V for 100mV sense voltage; eliminates need for external gain-setting resistors |
| Common-Mode Input Range | 0V to +28V - supports monitoring of battery packs in deep discharge without loss of accuracy |
| Full-Scale Accuracy | ±0.5% (typ) at +25°C - ensures <±5mV error on 10V output for precision fuel gauging and overcurrent detection |
| Bandwidth | 1.2MHz at G=100 - sufficient for closed-loop response in high-speed battery chargers and DC-DC converters |
| Supply Voltage Range | +3V to +28V - compatible with 12V/24V automotive systems and wide-input industrial supplies |
| Operating Temperature | –40°C to +125°C - meets full automotive AEC-Q100 Grade 0 requirements for under-hood applications |
| Output Drive | 2mA - directly drives ADC reference inputs or low-power comparators without buffer stages |
Pinout & Package
MAX4378HAUD+T is housed in a 14-pin TSSOP package (outline 21-0066, land pattern 90-0117), RoHS-compliant, with exposed pad for thermal enhancement. Pin pitch is 0.65mm; body dimensions are 5.0mm × 6.4mm × 1.2mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT1, OUT2, OUT3, OUT4 | Buffered voltage outputs proportional to respective sense currents; each drives up to 2mA into ground-referenced loads |
| 2, 6, 9, 13 | RS1−, RS2−, RS3−, RS4− | Load-side terminals of external sense resistors; connect to low side of shunts in high-side configuration |
| 3, 5, 10, 12 | RS1+, RS2+, RS3+, RS4+ | Power-source-side terminals of external sense resistors; tolerate up to +28V common-mode voltage |
| 4 | VCC | Positive supply input; powers all four channels; accepts 3V–28V with 66–90dB PSR |
| 11 | GND | Analog ground reference for all outputs and internal circuitry; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Validated for automotive use across –40°C to +125°C; listed in Maxim's /V ordering variants |
| Internal Fixed Gain | +100V/V eliminates external gain resistors, reducing BOM count and layout sensitivity to parasitic capacitance |
| Buffered Output Stage | Drives 2mA into ground-referenced loads - enables direct ADC interfacing without level-shifting or op-amp buffers |
| 0V Functional Common-Mode | Maintains accuracy even when battery voltage drops below 1V - essential for end-of-life battery state-of-charge estimation |
| Low Supply Current | 1mA per channel (4mA total) minimizes system power overhead in always-on monitoring circuits |
Applications
| Automotive Battery Management | Fuel Gauging in Laptops |
|---|---|
Use Scenario: Real-time bidirectional current measurement in 12V/48V hybrid vehicle battery disconnect units. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-referenced analog output for MCU ADC sampling at 10ksps. Use Value: Enables SOC/SOH calculation with ±0.5% full-scale accuracy across temperature and voltage extremes - critical for ASIL-B functional safety compliance. | Use Scenario: Monitoring charge/discharge current in smart battery packs for Windows-based ultrabooks. IC Role / Device Role / Timing Role: Quad-channel current sensor feeding four independent shunt paths (main battery, USB-C PD, auxiliary rail, fan controller). Use Value: Simultaneous multi-rail monitoring with single IC reduces PCB area by >60% vs. discrete solutions while maintaining 1.2MHz bandwidth for transient detection. |
| Industrial Power Supply Monitoring | PA Bias Control in RF Modules |
Use Scenario: Overcurrent protection and telemetry in programmable DC power supplies used in semiconductor test equipment. IC Role / Device Role / Timing Role: High-accuracy current feedback element in closed-loop regulation, interfaced to isolated sigma-delta ADC via 2mA buffered output. Use Value: 1.2MHz bandwidth allows real-time response to short-circuit events (<1µs recovery), improving system reliability during fault conditions. | Use Scenario: Dynamic bias current adjustment for GaN power amplifiers in 5G base station remote radio units. IC Role / Device Role / Timing Role: High-side current monitor delivering fast, accurate PA drain current feedback to DAC-controlled bias circuitry. Use Value: 2.0µs power-up time and 1µs saturation recovery ensure minimal distortion during rapid PA enable/disable cycles in TDD operation. |
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 |
|---|---|---|---|
| INA226AIDGST | 2.5V–5.5V supply only; I²C digital output; 16-bit resolution; no buffered analog output | Requires microcontroller interface and firmware; unsuitable for analog-loop feedback | Select when digital telemetry and multi-device bus sharing are prioritized over analog loop speed |
| MAX4008AUB+ | Single-channel; G=20 only; SOT23-6 package; 2MHz bandwidth; no AEC-Q100 qualification | Limited to single-rail monitoring; not certified for automotive under-hood deployment | Select for cost-sensitive, non-automotive portable applications requiring minimal footprint and lower gain |
Compared with MAX4378HAUD+T, the INA226AIDGST trades analog immediacy for digital configurability and bus scalability, while the MAX4008AUB+ sacrifices channel count, gain flexibility, and automotive qualification to reduce size and cost - making MAX4378HAUD+T the optimal choice for quad-channel, high-accuracy, AEC-Q100-compliant analog current sensing.
Availability
MAX4378HAUD+T is available at Aetrix Electronics and suitable for automotive battery management, laptop fuel gauging, and industrial power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4378HAUD+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/MAX4377/MAX4378 family was developed specifically for high-accuracy, high-voltage-range current sensing in battery-powered and automotive systems where ground-path integrity and temperature stability are critical.
FAQ
What is the maximum common-mode voltage the MAX4378HAUD+T can handle?
The MAX4378HAUD+T supports a common-mode input range of 0V to +28V - fully independent of its supply voltage (VCC). This means it can accurately monitor current even when the sensed node is at 28V while VCC is as low as 3V. The device remains functional down to 0V, enabling reliable operation during deep battery discharge states - a key requirement for automotive and portable fuel-gauge applications using MAX4378HAUD+T.
Does the MAX4378HAUD+T require external gain-setting resistors?
No, the MAX4378HAUD+T does not require external gain-setting resistors. It integrates a fixed +100V/V gain stage optimized for high-side current sensing. This eliminates resistor matching errors, layout sensitivity, and board space typically needed for external gain networks - simplifying design and improving accuracy consistency across production units of MAX4378HAUD+T.
Is the MAX4378HAUD+T qualified for automotive applications?
Yes, the MAX4378HAUD+T is AEC-Q100 qualified for automotive use. It operates across the full Grade 0 temperature range (–40°C to +125°C) and is specified for reliability in harsh environments such as engine compartments and battery control modules. The "/V" suffix denotes automotive qualification, and MAX4378HAUD+T meets those requirements as confirmed in Maxim's official ordering information and datasheet revision history.
What is the output drive capability of the MAX4378HAUD+T?
The MAX4378HAUD+T provides a buffered voltage output capable of sourcing up to 2mA into a ground-referenced load. This allows direct interfacing with standard SAR or sigma-delta ADC inputs, comparator thresholds, or low-power microcontroller analog pins - eliminating the need for additional op-amp buffers in most implementations of MAX4378HAUD+T.
Can the MAX4378HAUD+T be used for bidirectional current sensing?
The MAX4378HAUD+T itself is unidirectional - it measures current flow from RS+ to RS− only. However, paired with external circuitry (e.g., dual-shunt topology or polarity-switching logic), it can support bidirectional monitoring. For native bidirectional capability, Maxim offers dedicated devices like the MAX4008 series; MAX4378HAUD+T is optimized for high-accuracy, high-common-mode, single-direction sensing in applications such as battery discharge tracking and charger current limiting.
MAX4378HAUD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
MAX4378HAUD+T FAQ
1.How can I place an order for MAX4378HAUD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4378HAUD+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 MAX4378HAUD+T reliable?
The price and inventory of MAX4378HAUD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4378HAUD+T is usually 5 days.
3.What payment methods are accepted for MAX4378HAUD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4378HAUD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4378HAUD+T?
MAX4378HAUD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4378HAUD+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 MAX4378HAUD+T?
For technical support, including MAX4378HAUD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4378HAUD+T requirements.
6.How does Aetrix verify that MAX4378HAUD+T is sourced from the original manufacturer or authorized distributors?
All MAX4378HAUD+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 MAX4378HAUD+T meets industry standards.
7.What is the process for return or replacement of MAX4378HAUD+T?
All MAX4378HAUD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4378HAUD+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 MAX4378HAUD+T part is unused and in its original packaging.
Return procedure for MAX4378HAUD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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