My Inquiry
My Account
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:3,221
Please send an inquiry. Send us your inquiry, and we will respond immediately.
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 automotive-grade operation from −40°C to +125°C - used for precision battery-current monitoring in notebook computers and smart battery packs.
For engineers reviewing the MAX4378HAUD datasheet, MAX4378HAUD pinout, MAX4378HAUD application, or MAX4378HAUD equivalent, key selection criteria include its quad-channel TSSOP-14 package, internal gain eliminating external resistors, buffered 2mA-output drive, and AEC-Q100-compliant performance in high-common-mode, low-supply-drop battery-charger feedback loops.
Technical Context
The MAX4378HAUD implements a BiCMOS-based high-side sensing architecture with internal current-mirror gain scaling, enabling accurate VOUT = 100 × (VRS+ − VRS−) without external gain-setting components. Its input stage operates with rail-to-rail common-mode tolerance down to 0V, supporting deep-discharge battery monitoring.
Each of the four amplifiers delivers 2mA buffered output drive into ground-referenced loads, maintains ±5.5% total output error over −40°C to +125°C, and achieves 1µs saturation recovery time - critical for fast-response current limiting in switching regulator control paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - fixed internal gain eliminates need for external resistor network and reduces layout sensitivity. |
| Common-Mode Input Range | 0V to +28V - enables direct connection to battery terminals even during deep discharge, independent of VCC. |
| Bandwidth | 1.2MHz - supports use inside battery-charger control loops with sufficient phase margin for stability. |
| Supply Voltage Range | +3V to +28V - accommodates wide-input power rails including 12V/24V automotive and industrial systems. |
| Full-Scale Sense Voltage | 150mV - defines maximum differential input before clipping; sets minimum RSENSE for target load current. |
| Supply Current per Amplifier | 1mA (typ) - enables low-power operation in always-on fuel gauge and system-monitoring applications. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial embedded environments. |
Pinout & Package
MAX4378HAUD is housed in a 14-pin TSSOP package (outline 21-0066, land pattern 90-0117), RoHS-compliant with + suffix, measuring 5.0mm × 6.4mm × 1.2mm and rated for 727mW continuous dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT / OUT_ | Buffered voltage output proportional to sensed current; drives up to 2mA into ground-referenced loads. |
| 2, 6, 9, 13 | RS− / RS_− | Load-side terminal of external sense resistor; referenced to load ground, not device GND. |
| 3, 5, 10, 12 | RS+ / RS_+ | Power-source side of external sense resistor; accepts common-mode voltages up to +28V. |
| 4 | VCC | Positive supply input; powers all four amplifiers; operates from +3V to +28V. |
| 11 | GND | Analog ground reference for internal circuitry; must be connected to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +100V/V gain | Eliminates external gain-setting resistors, reducing BOM count and PCB area while improving temperature stability. |
| ±0.5% full-scale accuracy (TA = +25°C) | Enables precise fuel gauging and charge-state estimation in smart battery systems without calibration. |
| 0V to +28V common-mode range | Supports monitoring of battery current during deep discharge (<1V) without loss of functionality or accuracy. |
| 2.0MHz small-signal bandwidth (gain = +20) | Ensures stable closed-loop response in high-speed charger control circuits; bandwidth scales inversely with gain. |
| AEC-Q100 qualified | Validated for automotive applications including battery management modules and body control units requiring reliability certification. |
Applications
| Smart Battery Fuel Gauging | Battery Charger Feedback Loop |
|---|---|
|
Use Scenario: Real-time bidirectional current measurement in laptop battery packs to compute state-of-charge (SOC) and remaining runtime. IC Role / Device Role / Timing Role: Quad-channel high-side current sensor providing four independent analog outputs for simultaneous monitoring of main battery, backup cell, charging path, and system load. Use Value: Enables <1% SOC error over full temperature range using fixed +100V/V gain and ±0.5% full-scale accuracy - no trimming required. |
Use Scenario: Closed-loop current regulation in switch-mode battery chargers where fast transient response prevents overcurrent damage. IC Role / Device Role / Timing Role: High-bandwidth (1.2MHz) current feedback element feeding into charger controller's error amplifier. Use Value: 1µs saturation recovery and 800ns setting time ensure rapid correction during load steps without oscillation or latch-up. |
| Automotive Body Control Module | Industrial Power Supply Monitoring |
|
Use Scenario: Load-current supervision for door-lock actuators, HVAC blowers, and lighting drivers in AEC-Q100-compliant vehicle ECUs. IC Role / Device Role / Timing Role: Quad-channel current monitor detecting open-circuit, short-circuit, and overcurrent faults across multiple 12V/24V subsystems. Use Value: −40°C to +125°C operation and 0V–28V common-mode range allow direct placement near high-side FETs without level-shifting. |
Use Scenario: Board-level current telemetry in programmable DC power supplies used for test equipment and semiconductor fabrication tools. IC Role / Device Role / Timing Role: Precision high-side sensor interfacing to ADC inputs for digital power management and fault logging. Use Value: Buffered 2mA output drives long traces to remote ADCs without signal degradation; 1mA quiescent current minimizes self-heating 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 |
|---|---|---|---|
| INA226AIDGST | I²C digital output, 16-bit resolution, 0.1% gain error, but requires external VREF and lacks buffered analog output. | Suitable for digitally managed systems needing telemetry over bus; not drop-in for analog feedback loops. | Select when digital interface and programmable gain outweigh need for analog simplicity and speed. |
| MAX40056AUBB+ | Single-channel, 2.5MHz bandwidth, ±0.2% gain error, 2.7V–5.5V supply only - incompatible with 24V systems. | Optimized for low-voltage portable electronics; cannot replace MAX4378HAUD in 12V/24V automotive or industrial designs. | Choose only for space-constrained single-channel applications within 5.5V supply envelope. |
Compared with INA226AIDGST and MAX40056AUBB+, the MAX4378HAUD uniquely delivers quad-channel analog output, 0–28V common-mode operation, and automotive temperature range in one TSSOP-14 package - making it irreplaceable for analog-intensive, multi-rail battery management systems requiring minimal external components.
Availability
MAX4378HAUD is available at Aetrix Electronics and suitable for notebook computer power management, automotive battery monitoring, and industrial power supply telemetry requiring stable component supply across extended temperature and voltage ranges.
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 U.S.-based 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-common-mode, low-component-count current sensing in battery-powered and automotive systems - emphasizing integration, temperature stability, and functional safety readiness.
FAQ
What is the maximum common-mode voltage the MAX4378HAUD can handle?
The MAX4378HAUD supports a common-mode input range of 0V to +28V, fully independent of its supply voltage (VCC). This allows direct connection to battery terminals even during deep discharge conditions below 1V, and enables operation in 24V automotive systems without level-shifting circuitry. The specification is guaranteed by total output voltage error testing across temperature and supply variations.
Does the MAX4378HAUD require external gain-setting resistors?
No, the MAX4378HAUD does not require external gain-setting resistors. It features an internal fixed gain of +100V/V, implemented via precision BiCMOS current-mirror architecture. This eliminates resistor matching errors, reduces PCB footprint, improves temperature drift performance, and simplifies design - unlike adjustable amplifiers that rely on external feedback networks.
Is the MAX4378HAUD qualified for automotive applications?
Yes, the MAX4378HAUD is AEC-Q100 qualified for automotive use. It operates across the full automotive temperature range of −40°C to +125°C, meets stringent reliability and ESD requirements, and is manufactured in Maxim's certified automotive production flow. The "/V" suffix denotes automotive qualification, though MAX4378HAUD itself carries the + suffix indicating RoHS compliance and standard automotive screening.
What is the output drive capability of each channel in the MAX4378HAUD?
Each of the four output channels in the MAX4378HAUD provides buffered voltage output capable of sourcing up to 2mA into a ground-referenced load. This drive strength ensures compatibility with standard ADC inputs, op-amp buffers, and comparator thresholds without external amplification - critical for maintaining signal integrity in noisy industrial or automotive environments.
How does the MAX4378HAUD achieve high accuracy despite wide supply and common-mode voltage ranges?
The MAX4378HAUD achieves ±0.5% typical full-scale accuracy at +25°C through a combination of laser-trimmed BiCMOS input stages, matched internal resistor ratios, and supply- and common-mode-independent biasing. Its total output error remains within ±5.5% over −40°C to +125°C and across VCC = +3V to +28V, verified by production testing and characterized in the datasheet's error vs. temperature/voltage plots.
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:
- 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-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
-
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…
