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Analog Devices Inc./Maxim Integrated MAX4378TASD-T
- Part No.:
- MAX4378TASD-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4378TASD-T.pdf
- Description:
- IC CURR SENSE 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,625
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Product details
Overview
MAX4378TASD-T from Maxim Integrated is a dual-channel, high-side current-sense amplifier with fixed +20V/V gain, 0V to +28V input common-mode range independent of supply voltage, ±0.5% typical full-scale accuracy at +25°C, 2MHz bandwidth (gain = +20V/V), and automotive-grade operation from −40°C to +125°C. It enables precise battery-current monitoring in notebook computers and smart battery packs without disrupting ground paths.
For engineers reviewing the MAX4378TASD-T datasheet, MAX4378TASD-T pinout, MAX4378TASD-T application, or MAX4378TASD-T equivalent, key selection criteria include its dual-channel configuration, internal gain architecture eliminating external resistors, buffered 2mA-output drive capability, and AEC-Q100-compliant performance in high-common-mode, low-supply-voltage systems.
Technical Context
The MAX4378TASD-T implements a precision high-side sensing topology using an internal current-mirror-based amplifier core with fixed +20V/V gain. Its input stage operates with rail-to-rail common-mode range (0V to +28V), decoupled from VCC, enabling accurate current measurement during deep battery discharge.
It features buffered voltage outputs capable of sourcing/sinking up to 2mA into ground-referenced loads, supports supply voltages from +3V to +28V, and delivers 2MHz small-signal bandwidth with 10V/µs slew rate-making it suitable for real-time feedback in battery-charger control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +20V/V - Fixed internal gain eliminates need for external gain-setting resistors. |
| Common-Mode Input Range | 0V to +28V - Enables sensing across fully discharged batteries without supply dependency. |
| Full-Scale Accuracy | ±0.5% (typ) at +25°C - Ensures high-precision current measurement for fuel gauging and protection. |
| Bandwidth | 2MHz - Supports fast transient response in switching regulator and charger control loops. |
| Supply Voltage Range | +3V to +28V - Compatible with wide-input industrial and automotive power rails. |
| Operating Temperature | −40°C to +125°C - Qualified for under-hood and portable-system environments. |
| Output Drive | 2mA - Sufficient to directly interface with ADC inputs or comparator thresholds. |
| Supply Current | 1mA per channel (typ) - Low quiescent power supports always-on monitoring in battery systems. |
Pinout & Package
MAX4378TASD-T is housed in a 14-pin SOIC package (package code S14+1, outline 21-0041), RoHS-compliant with tape-and-reel delivery (suffix -T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | OUT1, OUT2 | Dual buffered output voltages proportional to sensed current; each drives up to 2mA. |
| 2, 6, 9, 13 | RS1−, RS2−, RS3−, RS4− | Load-side terminals for four external sense resistors - supports dual independent channels. |
| 3, 5, 10, 12 | RS1+, RS2+, RS3+, RS4+ | Power-source-side terminals for sense resistors - accepts 0V to +28V common-mode. |
| 4, 11 | GND | Analog ground reference for internal circuitry and output stage. |
| 8, 14 | VCC | Positive supply input (+3V to +28V); powers both amplifier channels and output buffers. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +20V/V gain | Eliminates external gain resistors, reducing BOM count and layout sensitivity to parasitic capacitance. |
| 0V to +28V common-mode range | Enables accurate current sensing even when battery voltage drops below system supply (e.g., 0.5V pack). |
| Buffered 2mA output drive | Directly interfaces with SAR ADCs or comparators without external op-amp buffering stages. |
| 2MHz bandwidth | Supports closed-loop response in high-frequency switching chargers (e.g., >500kHz buck converters). |
| AEC-Q100 qualified | Validated for automotive current detection applications including battery management and PA bias control. |
| 1mA per channel supply current | Minimizes self-heating and extends runtime in always-on battery-monitoring circuits. |
Applications
| Notebook Battery Monitoring | Smart Battery Fuel Gauge |
|---|---|
|
Use Scenario: Real-time bidirectional current tracking in lithium-ion battery packs within ultrabooks. IC Role / Device Role / Timing Role: Dual-channel high-side current sensor measuring charge/discharge current with <1% error over temperature. Use Value: Enables accurate state-of-charge estimation and overcurrent protection without ground-path interference. |
Use Scenario: Integration into SMBus/I²C smart battery modules for host-reported fuel gauge data. IC Role / Device Role / Timing Role: Precision analog front-end converting sense-resistor voltage to calibrated ADC input for microcontroller processing. Use Value: Delivers ±0.5% full-scale accuracy at +25°C and <±3.25% over full automotive temperature range. |
| Battery Charger Control Loop | Automotive Body Control Module |
|
Use Scenario: Feedback element in constant-current/constant-voltage (CC/CV) charging algorithms for USB-PD and proprietary fast chargers. IC Role / Device Role / Timing Role: High-bandwidth (2MHz) current monitor providing real-time loop feedback to PWM controller. Use Value: Enables stable regulation with <400ns output settling time for 1% final value during load transients. |
Use Scenario: Load-current supervision for LED headlamps, window motors, and HVAC blowers in modern BCMs. IC Role / Device Role / Timing Role: Dual-channel high-side monitor detecting open-circuit, short-circuit, and overcurrent faults. Use Value: Operates reliably across −40°C to +125°C with AEC-Q100 qualification and 0V–28V common-mode tolerance. |
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 |
|---|---|---|---|
| MAX4377TAUA+ | Dual-channel, same +20V/V gain, 8-pin µMAX package (smaller footprint, lower thermal mass) | Limited to single-supply ≤28V; identical electrical specs but reduced PCB area and thermal dissipation capability | Select for space-constrained portable designs where 362mW max power dissipation suffices |
| INA240A1QDRQ1 | Single-channel, +20V/V gain, 8-pin SOIC, AEC-Q100 Grade 1, 120dB CMRR (vs. 90dB) | Higher common-mode rejection improves noise immunity in noisy automotive harnesses; no dual-channel integration | Select when ultra-high CMRR is required and dual-channel functionality is not needed |
Compared with MAX4377TAUA+, the MAX4378TASD-T offers higher thermal margin (727mW vs. 362mW) and dual-channel independence in SOIC; compared with INA240A1QDRQ1, it provides integrated dual-channel sensing but lower CMRR-making it optimal for cost-sensitive, thermally demanding dual-load monitoring.
Availability
MAX4378TASD-T is available at Aetrix Electronics and suitable for notebook computers, battery chargers, and automotive body control modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX4378TASD-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 and mixed-signal ICs for power, sensing, and connectivity applications in industrial, automotive, and computing markets.
The MAX4376/MAX4377/MAX4378 family was engineered specifically for high-accuracy, high-common-mode, low-power current sensing in battery-powered and automotive systems-emphasizing integration, accuracy, and robustness over wide voltage and temperature ranges.
FAQ
What is the pin configuration of the MAX4378TASD-T?
The MAX4378TASD-T uses a 14-pin SOIC package with dual-channel layout: pins 1 and 7 are OUT1 and OUT2; pins 2,6,9,13 are RS− terminals; pins 3,5,10,12 are RS+ terminals; pins 4 and 11 are GND; pins 8 and 14 are VCC. No internal connections exist on unused pins-no NC pins are present in this variant.
Does the MAX4378TASD-T support bidirectional current sensing?
The MAX4378TASD-T is unidirectional by design-it measures current flow from RS+ to RS− only. For true bidirectional sensing, two devices or a dedicated bidirectional amplifier like the MAX4008 are required. Its output saturates near ground when reverse current occurs, indicating polarity violation rather than signed measurement.
What is the maximum capacitive load the MAX4378TASD-T can drive?
The MAX4378TASD-T supports up to 1000pF of capacitive load without sustained oscillation, as specified in its Electrical Characteristics table. For loads exceeding 100pF, series output resistance (e.g., 10Ω–50Ω) is recommended to maintain stability and prevent overshoot in high-speed sampling applications.
How does the MAX4378TASD-T handle deep-discharge battery monitoring?
The MAX4378TASD-T maintains functional accuracy down to 0V common-mode input-critical for monitoring Li-ion cells at end-of-discharge (<2.5V). Its input stage remains operational and linear even when VRS+ falls below VCC, ensuring continuous current visibility without ground-path disruption.
Is the MAX4378TASD-T RoHS-compliant and lead-free?
Yes, the MAX4378TASD-T is RoHS-compliant and lead-free, indicated by the "+" suffix in its ordering code. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and is compatible with standard reflow soldering profiles up to +260°C peak temperature.
MAX4378TASD-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:
- Obsolete
- 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
MAX4378TASD-T FAQ
1.How can I place an order for MAX4378TASD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4378TASD-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 MAX4378TASD-T reliable?
The price and inventory of MAX4378TASD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4378TASD-T is usually 5 days.
3.What payment methods are accepted for MAX4378TASD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4378TASD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4378TASD-T?
MAX4378TASD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4378TASD-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 MAX4378TASD-T?
For technical support, including MAX4378TASD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4378TASD-T requirements.
6.How does Aetrix verify that MAX4378TASD-T is sourced from the original manufacturer or authorized distributors?
All MAX4378TASD-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 MAX4378TASD-T meets industry standards.
7.What is the process for return or replacement of MAX4378TASD-T?
All MAX4378TASD-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4378TASD-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 MAX4378TASD-T part is unused and in its original packaging.
Return procedure for MAX4378TASD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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