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Analog Devices Inc./Maxim Integrated MAX4378TASD
- Part No.:
- MAX4378TASD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4378TASD.pdf
- Description:
- IC CURR SENSE 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,822
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Product details
Overview
MAX4378TASD from Maxim Integrated is a quad-channel, high-side current-sense amplifier with fixed +20V/V gain, 0–28V input common-mode range independent of supply voltage, ±0.5% typical full-scale accuracy at +25°C, and 2MHz bandwidth (gain = +20V/V). It operates from +3V to +28V supply, draws 1mA per channel, and supports automotive temperature range (−40°C to +125°C), enabling precise battery-current monitoring in notebook computers and smart battery packs.
For engineers reviewing the MAX4378TASD datasheet, MAX4378TASD pinout, MAX4378TASD application, or MAX4378TASD equivalent, key selection criteria include its quad-channel SO-14 package, internal gain architecture eliminating external resistors, buffered 2mA-output drive capability, and AEC-Q100-compliant operation for automotive current detection and power management systems.
Technical Context
The MAX4378TASD implements a precision high-side sensing architecture using an internal current-mirror-based gain stage with fixed +20V/V amplification. Its input common-mode range extends from 0V to +28V regardless of VCC, enabling accurate current measurement during deep battery discharge and across supply voltages exceeding VCC.
Each of the four channels features a buffered voltage output capable of driving up to 2mA into ground-referenced loads, with 2MHz small-signal bandwidth and 1µs saturation recovery time. The device uses BiCMOS process technology and requires no external gain-setting components, simplifying layout and improving system-level accuracy in multi-rail power monitoring applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +20V/V - fixed internal gain eliminates need for external resistor network and reduces layout sensitivity. |
| Input Common-Mode Range | 0V to +28V - enables direct connection to battery terminals even at near-zero voltage without loss of functionality. |
| Full-Scale Sense Voltage | 150mV - defines maximum differential input before clipping; sets resolution limit for RSENSE selection. |
| Supply Voltage Range | +3V to +28V - supports wide-input industrial and automotive power rails without external regulation. |
| Supply Current per Channel | 1mA (typ) - enables low-power operation in always-on battery-monitoring circuits. |
| Bandwidth | 2MHz - sufficient for closed-loop battery-charger control and fast transient current detection. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial embedded environments. |
| Total Output Voltage Error | ±0.5% (typ, +25°C) - ensures high-accuracy fuel gauge and overcurrent protection decisions. |
Pinout & Package
The MAX4378TASD is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27mm pitch, RoHS-compliant lead finish, and thermal resistance θJA = 667°C/W on multi-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT / OUT_ | Buffered voltage output proportional to sense current; drives up to 2mA load referenced to GND. |
| 2, 6, 9, 13 | RS− / RS_− | Load-side terminal of external sense resistor; connects to load/battery negative side. |
| 3, 5, 10, 12 | RS+ / RS_+ | Power-source side of external sense resistor; accepts common-mode voltage up to +28V. |
| 4 | GND | Analog ground reference for all internal circuitry and output buffer. |
| 11 | VCC | Positive supply input for all four channels; operates from +3V to +28V. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel integration | Four independent high-side current monitors in single SO-14 package reduce BOM count and PCB area vs. discrete solutions. |
| Internal +20V/V gain | Eliminates external gain-setting resistors, minimizing offset drift, layout parasitics, and calibration complexity. |
| 0V to +28V common-mode range | Enables uninterrupted current monitoring during battery deep-discharge (<1V) without signal loss or rail dependency. |
| Buffered 2mA output drive | Directly interfaces with ADC inputs or comparator thresholds without external op-amp buffering stages. |
| AEC-Q100 qualification | Validated for automotive current-sense applications including battery management and PA bias control. |
| 2MHz bandwidth | Supports real-time response in switching regulator feedback loops and fast overcurrent shutdown detection. |
Applications
| Smart Battery Fuel Gauging | Battery Charger Control Loop |
|---|---|
|
Use Scenario: Real-time bidirectional current monitoring in laptop battery packs to compute state-of-charge (SoC) and detect charge/discharge anomalies. IC Role / Device Role / Timing Role: Quad-channel high-side current-sense amplifier measuring current through four independent battery cells or parallel paths. Use Value: ±0.5% full-scale accuracy at +25°C and stable error down to 0V common-mode enable <1% SoC estimation error over full battery voltage range. |
Use Scenario: Closed-loop current regulation inside constant-current/constant-voltage (CC/CV) battery chargers for Li-ion and NiMH chemistries. IC Role / Device Role / Timing Role: High-bandwidth (+20V/V) current feedback sensor feeding error amplifier in charger IC control loop. Use Value: 2MHz bandwidth and 1µs saturation recovery ensure stable loop dynamics and fast response to load transients without oscillation. |
| Automotive Body Control Module | Industrial Power Supply Monitoring |
|
Use Scenario: Load-current supervision of lighting, HVAC, and infotainment subsystems in 12V/24V automotive electrical architectures. IC Role / Device Role / Timing Role: Four-channel high-side monitor detecting overcurrent, short-circuit, and open-load faults across multiple vehicle domains. Use Value: −40°C to +125°C operation and AEC-Q100 qualification guarantee reliable fault detection under hood temperature extremes. |
Use Scenario: Board-level current telemetry in programmable DC power supplies and server VRMs requiring multi-rail monitoring. IC Role / Device Role / Timing Role: Precision quad current sensor providing isolated analog outputs for microcontroller ADC sampling. Use Value: Buffered 2mA output drive allows direct connection to 10kΩ ADC input impedance without signal degradation or loading error. |
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 fixed gain; same SO-14 package, identical pinout, and temperature range. | Better resolution for lower-current sensing (e.g., <2A full-scale) due to higher gain and same 150mV full-scale sense voltage. | Select when higher output voltage swing is needed for low-current accuracy without changing PCB layout. |
| MAX4378HASD+ | +100V/V fixed gain; same SO-14 package, identical pinout, and temperature range. | Optimized for sub-1A full-scale applications where 150mV × 100 = 15V output maximizes ADC utilization. | Choose for ultra-low-current monitoring (e.g., standby leakage, sensor bias) where maximum gain improves SNR. |
Compared with MAX4378FASD+ and MAX4378HASD+, the MAX4378TASD provides optimal dynamic range for mid-range currents (1–10A) with +20V/V gain, balancing noise immunity, headroom, and resolution-making it ideal for general-purpose quad-channel power monitoring where moderate gain suffices.
Availability
MAX4378TASD is available at Aetrix Electronics and suitable for notebook computers, automotive body control modules, and industrial power supply monitoring requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX4378TASD 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 interface applications, with emphasis on high-reliability, low-power, and automotive-grade solutions.
The MAX4376/MAX4377/MAX4378 product line delivers integrated high-side current-sense amplifiers optimized for battery-powered systems, automotive current detection, and power management where accuracy, wide common-mode range, and minimal external components are critical.
FAQ
What is the package type and pin count of the MAX4378TASD?
The MAX4378TASD is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) with standard 1.27mm pitch and RoHS-compliant finish. It contains four fully independent high-side current-sense amplifier channels, each with dedicated RS+, RS−, and OUT pins, plus shared VCC and GND connections. Pin compatibility is maintained across the MAX4378 family (T/F/H variants) in this package.
Does the MAX4378TASD require external gain-setting resistors?
No, the MAX4378TASD does not require external gain-setting resistors. It integrates a fixed +20V/V gain stage internally, eliminating resistor matching errors, temperature drift, and PCB layout sensitivity. This architecture directly converts the sense resistor voltage drop (VSENSE = ILOAD × RSENSE) into a proportional output voltage (VOUT = 20 × VSENSE), simplifying design and improving long-term accuracy.
What is the minimum common-mode input voltage supported by the MAX4378TASD?
The MAX4378TASD supports a common-mode input voltage range from 0V to +28V, independent of supply voltage. At 0V common-mode, the device remains functional-critical for monitoring deeply discharged batteries where the pack voltage falls below 1V. Full accuracy (±0.5% typical) is specified above +2V common-mode, but operation remains valid down to 0V.
Can the MAX4378TASD be used in automotive applications?
Yes, the MAX4378TASD is AEC-Q100 qualified and rated for operation from −40°C to +125°C, making it suitable for automotive current-sense applications including battery management, lighting control, and power distribution monitoring. Its 0–28V common-mode range supports 12V and 24V vehicle architectures, and its SO-14 package meets automotive mechanical and thermal reliability requirements.
What is the output drive capability of the MAX4378TASD?
The MAX4378TASD provides a buffered voltage output capable of sourcing up to 2mA into a ground-referenced load. This eliminates the need for external output buffers when interfacing with typical 10kΩ–100kΩ ADC inputs or comparator thresholds. The output remains linear and stable up to the 2mA limit, with VOL ≤ 40mV at 200µA load and VOH = VCC − 0.9V at 2mA load (VCC = 3V).
MAX4378TASD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MAX4378TASD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4378TASD 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 reliable?
The price and inventory of MAX4378TASD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4378TASD is usually 5 days.
3.What payment methods are accepted for MAX4378TASD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4378TASD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4378TASD?
MAX4378TASD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4378TASD 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?
For technical support, including MAX4378TASD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4378TASD requirements.
6.How does Aetrix verify that MAX4378TASD is sourced from the original manufacturer or authorized distributors?
All MAX4378TASD 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 meets industry standards.
7.What is the process for return or replacement of MAX4378TASD?
All MAX4378TASD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4378TASD, 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 part is unused and in its original packaging.
Return procedure for MAX4378TASD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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