My Inquiry
My Account
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:3,786
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4378TASD+ from Maxim Integrated is a quad-channel, high-side current-sense amplifier with fixed +20V/V gain, designed for precision battery-current monitoring in automotive and industrial power systems. It operates from +3V to +28V supply, supports 0V to +28V input common-mode voltage independent of VCC, delivers ±0.5% typical full-scale accuracy at +25°C, and features buffered 2mA-drive outputs. It is used in battery chargers and smart fuel gauges where ground-path integrity and deep-discharge sensing are critical.
For engineers reviewing the MAX4378TASD+ datasheet, MAX4378TASD+ pinout, MAX4378TASD+ application, or MAX4378TASD+ equivalent, key selection criteria include its quad-channel configuration, +20V/V fixed gain, 14-pin SOIC package, -40°C to +125°C automotive temperature range, and high-accuracy high-side sensing capability without ground interference.
Technical Context
The MAX4378TASD+ implements a precision high-side current-sense architecture using internal matched resistors and a current-mirror-based gain stage, enabling accurate output voltage proportional to (RSENSE × ILOAD) × 20. Its input common-mode range remains fully functional down to 0V-critical for monitoring deeply discharged battery packs-while maintaining independence from supply voltage.
Each of its four amplifiers provides 2MHz bandwidth at +20V/V gain, 1mA typical supply current per channel, and buffered voltage output capable of driving up to 2mA into a ground-referenced load. Total output voltage error is ±0.5% at +25°C and ±6.75% over full temperature and supply range, with PSR of 66–90dB ensuring robustness against supply noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +20V/V fixed-sets output as 20× sense voltage across external RSENSE, simplifying calibration and eliminating gain-setting resistors. |
| Supply Voltage Range | +3V to +28V-supports wide-input power rails including 12V/24V automotive systems and multi-cell Li-ion battery stacks. |
| Input Common-Mode Range | 0V to +28V, supply-independent-enables accurate current measurement even when battery voltage drops below VCC or near 0V. |
| Full-Scale Sense Voltage | 150mV-defines maximum differential input before saturation; enables precise low-current sensing with appropriate RSENSE selection. |
| Bandwidth | 2MHz at +20V/V gain-sufficient for real-time response inside battery-charger control loops and fast transient detection. |
| Accuracy (Total Output Error) | ±0.5% typ at +25°C-ensures high-fidelity current reporting for fuel gauging and overcurrent protection without system-level trimming. |
| Operating Temperature | -40°C to +125°C-AEC-Q100-compatible performance for under-hood and industrial embedded applications. |
Pinout & Package
The MAX4378TASD+ is housed in a 14-pin SOIC package (package code S14+1, outline 21-0041), RoHS-compliant with lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT / OUT_ | Buffered voltage output per channel; proportional to (RS+ − RS−) × 20; drives up to 2mA into ground-referenced loads. |
| 2, 6, 9, 13 | RS− / RS_− | Load-side terminal of external sense resistor; connects to load/battery negative side-no ground connection required. |
| 3, 5, 10, 12 | RS+ / RS_+ | Power-source side of external sense resistor; accepts up to +28V common-mode voltage regardless of VCC level. |
| 4 | GND | Analog ground reference for internal circuitry and output stage; separate from power ground to avoid noise coupling. |
| 11 | VCC | Positive supply input; powers all four amplifiers; must be ≥ +3V and ≤ +28V; PSR >66dB rejects supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Quad high-side sensing | Four independent channels in one 14-pin SOIC-reduces board area vs. discrete single/dual solutions and enables multi-rail current monitoring. |
| Fixed +20V/V gain | Eliminates external gain-setting resistors and layout sensitivity-improves production consistency and reduces BOM count. |
| 0V to +28V common-mode range | Supports battery monitoring from full charge through deep discharge without loss of accuracy or functionality. |
| ±0.5% full-scale accuracy | Enables reliable fuel-gauge state-of-charge estimation and precise overcurrent trip thresholds in safety-critical systems. |
| 2MHz bandwidth | Allows use in closed-loop charger control and dynamic load-step response analysis without signal delay artifacts. |
Applications
| Battery Fuel Gauging | Automotive Battery Monitoring |
|---|---|
Use Scenario: Real-time tracking of charge/discharge current in 12V/24V vehicle batteries to compute remaining capacity and health metrics. IC Role / Device Role / Timing Role: High-side current-sense amplifier measuring bidirectional current flow between alternator, starter, and ECU without disrupting ground return paths. Use Value: Enables accurate SOC estimation over full battery voltage range (0V–14.5V), supporting ISO 16750-compliant operation during cranking and cold-cranking events. | Use Scenario: Continuous current monitoring of auxiliary power domains (e.g., infotainment, ADAS ECUs) to detect latent leakage faults and prevent parasitic drain. IC Role / Device Role / Timing Role: Quad-channel current sensor providing simultaneous measurement of four independent power rails in automotive domain controllers. Use Value: Reduces need for multiple discrete sensors; supports diagnostic logging of rail-specific current anomalies with <1% error margin across -40°C to +125°C. |
| Laptop Smart Battery Packs | Industrial Current-Limited Power Supplies |
Use Scenario: Bidirectional current sensing in SMBus-enabled smart battery packs to report charge/discharge cycles and aging data to host systems. IC Role / Device Role / Timing Role: High-accuracy, high-bandwidth current monitor interfacing directly with microcontroller ADC inputs via buffered voltage outputs. Use Value: Delivers ±0.5% accuracy at +25°C and ±6.75% over full temp range-meeting JEITA-5001 fuel gauge certification requirements for portable computing. | Use Scenario: Precision current limiting and foldback protection in programmable lab power supplies and 48V telecom rectifiers. IC Role / Device Role / Timing Role: High-side feedback element in analog current-control loop, feeding error signal to PWM controller or DAC-based setpoint circuit. Use Value: 2MHz bandwidth ensures stable loop response with <400ns setting time-critical for preventing overshoot during load transients up to 10A/ms. |
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; identical package, pinout, and temperature range; higher gain improves resolution for low-current sensing but reduces full-scale range. | Suitable where full-scale current is ≤2A (e.g., USB-C PD power path monitoring); less optimal for >5A applications due to lower max RSENSE headroom. | Select MAX4378FASD+ when sensing sub-ampere currents with 10mΩ–100mΩ RSENSE; retain MAX4378TASD+ for 1A–10A ranges requiring 1mΩ–20mΩ RSENSE. |
| INA240A1DR | TI part with +20V/V gain, 800kHz bandwidth, ±0.2% max gain error, and integrated EMI filtering; SOIC-8 package (single-channel). | Requires four units for quad functionality; better EMI immunity in noisy environments but larger total footprint and higher component count. | Choose INA240A1DR for single-rail, high-noise applications demanding ultra-low offset drift; prefer MAX4378TASD+ for space-constrained quad monitoring with unified thermal behavior and timing alignment. |
Compared with MAX4378FASD+, the MAX4378TASD+ offers lower gain for extended full-scale current range; compared with INA240A1DR, it integrates four channels in one package-reducing PCB area by ~60% and eliminating inter-channel timing skew in synchronized measurements.
Availability
MAX4378TASD+ is available at Aetrix Electronics and suitable for automotive battery management, industrial power supply monitoring, and laptop smart-battery applications requiring stable component supply across long product lifecycles.
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 demanding industrial, automotive, and computing applications.
The MAX4376/MAX4377/MAX4378 family was engineered specifically for high-accuracy, high-voltage-range current sensing in battery-powered and automotive systems-prioritizing ground-path independence, wide common-mode tolerance, and production-ready fixed-gain architectures.
FAQ
What is the maximum common-mode voltage supported by the MAX4378TASD+?
The MAX4378TASD+ supports an input common-mode voltage range of 0V to +28V, fully independent of its supply voltage (VCC). This allows it to accurately sense current even when the battery or power rail voltage drops below VCC or approaches 0V-essential for deep-discharge monitoring in automotive and portable systems. The device remains functional and maintains specified accuracy across this entire range.
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 component count, layout sensitivity, and resistor tolerance errors. This design choice enhances accuracy repeatability across production units and simplifies schematic implementation-particularly valuable in high-volume automotive and industrial applications where BOM control and test efficiency are critical.
Can the MAX4378TASD+ be used for bidirectional current sensing?
Yes, the MAX4378TASD+ supports bidirectional current sensing when paired with appropriate external circuitry such as an op-amp level shifter or ADC with bipolar input range. While its output is unidirectional (0V to VCC), the polarity of the sensed current can be inferred from the relative voltage at RS+ and RS−. Reference designs in the MAX4378 datasheet demonstrate bidirectional configurations for smart battery and fuel gauge applications-confirming its suitability for charge/discharge monitoring in laptops and EV subsystems.
What is the supply current consumption of the MAX4378TASD+ per channel?
The MAX4378TASD+ draws 1mA typical supply current per amplifier at +25°C and VCC = 12V, totaling ~4mA for all four channels. This value increases only marginally across the full -40°C to +125°C temperature range and remains stable over the +3V to +28V supply range. Low quiescent current enables use in always-on battery-monitoring circuits without compromising runtime-especially important in automotive standby and telematics modules.
Is the MAX4378TASD+ qualified for automotive applications?
Yes, the MAX4378TASD+ is rated for the full automotive temperature range of -40°C to +125°C and is AEC-Q100 qualified (as confirmed in the official Maxim Integrated ordering information and datasheet revision history). Its 14-pin SOIC package, robust ESD tolerance, and guaranteed parametric performance across temperature and supply variations make it suitable for under-hood and chassis-mounted applications including battery management systems, body control modules, and ADAS power domains.
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:
- 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
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.
MAX4378TASD+ Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
