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Analog Devices Inc./Maxim Integrated MAX4374HEUB-T
- Part No.:
- MAX4374HEUB-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4374HEUB-T.pdf
- Description:
- IC AMP COMP REF 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,594
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Product details
Overview
MAX4374HEUB-T from Maxim Integrated is a micropower, high-side current-sense amplifier with integrated latching comparator and 600mV bandgap reference, designed for overcurrent supervision in battery-powered systems. It features +100V/V gain, 0V to +28V input common-mode range independent of supply voltage, 1mV max input offset voltage, and 50µA supply current - enabling precise, low-power current monitoring in notebook computers and smart battery chargers.
For engineers reviewing the MAX4374HEUB-T datasheet, MAX4374HEUB-T pinout, MAX4374HEUB-T application, or MAX4374HEUB-T equivalent, key selection criteria include its latched comparator output for stable fault flagging, 10-pin µMAX package compatibility, +100V/V fixed gain for high-sensitivity low-current detection, and operation across +2.7V to +28V supply with deep-discharge battery support.
Technical Context
The MAX4374HEUB-T implements a single high-side current-sense amplifier with rail-to-rail output and a dedicated latching comparator whose negative input is tied to an internal 600mV reference. Its 0V to +28V common-mode range remains functional even when VCC drops below 2.7V, ensuring reliable monitoring during battery deep discharge.
It includes a second open-drain comparator (CIN2/COUT2) for window-detection configurations, and RESET pin control enables latch reset or transparent mode operation. The device uses no external gain-setting resistors - output voltage is directly proportional to sense voltage via fixed +100V/V gain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - sets full-scale output at 100mV sense voltage, enabling high-resolution detection of small load currents |
| Input Offset Voltage | ≤1mV - ensures accurate low-current measurement without calibration in precision power rails |
| Supply Current | 50µA - extends battery life in portable systems without compromising response time |
| Common-Mode Range | 0V to +28V, supply-independent - maintains functionality even when battery voltage falls below VCC minimum |
| Comparator Threshold | 600mV ±10mV - provides stable overcurrent trip point referenced to internal bandgap |
| Operating Supply | +2.7V to +28V - supports wide-input industrial and automotive battery systems |
| Temperature Range | -40°C to +85°C - qualified for embedded industrial and mobile equipment environments |
Pinout & Package
MAX4374HEUB-T is housed in a 10-pin µMAX® package (RoHS-compliant, lead-free), measuring 3mm × 3mm with 0.5mm pitch. Pin 1 is marked by a dot; the substrate is connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RS+ | High-side sense resistor positive terminal | Connects to battery/load side of external sense resistor; accepts up to +28V common-mode voltage |
| 2 RS- | High-side sense resistor negative terminal | Completes differential sense path; differential input limited to ±0.3V |
| 3 OUT | Current-sense amplifier output | Voltage output proportional to (RS+ − RS−) × 100; clamped at 12V max |
| 4 CIN1 | Comparator 1 positive input | Monitors amplified sense voltage; trips when >600mV to trigger latched COUT1 |
| 5 CIN2 | Comparator 2 input (MAX4374/MAX4375 only) | Used for window detection: positive input for MAX4374, negative for MAX4375 |
| 6 COUT1 | Latching comparator open-drain output | Drives low on overcurrent; requires external pull-up; reset via RESET pin |
| 7 COUT2 | Second comparator open-drain output | Unlatched; used with CIN2 for upper/lower threshold detection |
| 8 RESET | Latch control input | Pull low ≥1.5µs to reset COUT1; hold low for transparent comparator behavior |
| 9 GND | Analog/digital ground reference | Substrate-connected; must be low-impedance return path for sense and comparator circuits |
| 10 VCC | Power supply input | Accepts +2.7V to +28V; bypass with 0.1µF ceramic capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bandgap reference | 600mV ±1.6% - eliminates external reference IC and improves trip-point stability over temperature |
| Latching comparator output | COUT1 remains asserted after overcurrent event until RESET is pulsed - prevents oscillation in power-shutdown circuits |
| No external gain resistors | Fixed +100V/V gain - reduces BOM count and layout sensitivity while maintaining accuracy |
| Deep-discharge monitoring capability | 0V common-mode operation - enables current sensing even when battery voltage drops below 1V |
| Window-detection dual comparators | CIN2/COUT2 pair allows simultaneous high/low threshold detection - simplifies battery charge/discharge envelope monitoring |
Applications
| Smart Battery Protection | Notebook Power Management |
|---|---|
Use Scenario: Monitoring battery pack current during charging and discharging to prevent overcurrent faults and thermal runaway. IC Role / Device Role / Timing Role: High-side current-sense amplifier + latching comparator supervises real-time load current and asserts permanent fault flag on violation. Use Value: Enables fail-safe shutdown before MOSFET or cell damage occurs; 50µA quiescent current minimizes standby drain. | Use Scenario: Detecting abnormal DC-DC converter output current in ultrabook main power rails. IC Role / Device Role / Timing Role: Provides isolated high-side current feedback to system controller; OUT voltage scales linearly with load for telemetry. Use Value: +100V/V gain delivers 100mV full-scale output from 1mΩ sense resistor at 100mA - ideal for low-loss, high-accuracy rail monitoring. |
| Portable Medical Device Safety | Industrial 24V DC Power Supervision |
Use Scenario: Ensuring safe current limits in handheld diagnostic instruments powered by Li-ion batteries. IC Role / Device Role / Timing Role: Acts as primary overcurrent supervisor with latch-hold behavior to disable power path until manual reset. Use Value: Latched COUT1 output eliminates need for external microcontroller polling; RESET pin allows controlled recovery sequence. | Use Scenario: Monitoring 24V industrial bus current for short-circuit detection in PLC I/O modules. IC Role / Device Role / Timing Role: High-side amplifier interfaces directly to 24V rail; 0–28V common-mode range accommodates brownout conditions. Use Value: Independent common-mode range ensures continuous supervision even during line dips - critical for uptime-sensitive automation systems. |
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 |
|---|---|---|---|
| MAX4375HEUB+ | +100V/V gain, identical pinout and specs, but includes inverted second comparator polarity for window detection | Preferred for asymmetric current windows where lower threshold must trigger first | Select MAX4375HEUB+ if CIN2 must serve as negative input for undercurrent detection |
| INA219AIDR | I²C digital output, 12-bit ADC, bidirectional sensing, 26V max common-mode, 1mA supply current | Suitable for systems requiring telemetry logging or software-configurable thresholds | Choose INA219AIDR when digital interface, bidirectional sensing, or programmable alert thresholds are required |
Compared with MAX4374HEUB-T, MAX4375HEUB+ offers identical analog performance but reversed CIN2 polarity for flexible window detection, while INA219AIDR trades analog simplicity for digital configurability and higher power consumption - making MAX4374HEUB-T optimal for low-power, latch-based hardware-only protection.
Availability
MAX4374HEUB-T is available at Aetrix Electronics and suitable for notebook computers, smart battery packs, and industrial 24V power supervision requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4374HEUB-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.
The MAX4373/MAX4374/MAX4375 family targets cost-sensitive, battery-operated systems needing integrated high-side current supervision with minimal external components and ultra-low quiescent current.
FAQ
What is the function of the RESET pin on the MAX4374HEUB-T?
The RESET pin controls the latching behavior of the primary comparator output (COUT1). When held high (>2.0V), COUT1 latches low upon overcurrent detection and remains asserted until RESET is pulsed low (<0.8V) for ≥1.5µs. Holding RESET low makes the comparator transparent - COUT1 follows CIN1 in real time. This behavior is essential for controlled fault recovery in power systems using MAX4374HEUB-T.
Does the MAX4374HEUB-T support low-side current sensing?
Yes, the MAX4374HEUB-T can be used for low-side current sensing, but total output voltage error increases significantly when RS+ falls below 2V. Its optimized architecture and guaranteed specifications apply to high-side configurations. For low-side applications demanding highest accuracy, MAX4374HEUB-T requires careful error budgeting - especially near ground - due to degraded CMR and offset performance below 2V common-mode.
What is the maximum sense resistor voltage supported by the MAX4374HEUB-T?
The MAX4374HEUB-T supports a full-scale sense voltage of 100mV for the +100V/V gain version. This means the differential voltage (RS+ − RS−) must not exceed 100mV to maintain specified accuracy and avoid saturation. Exceeding this limit causes nonlinear gain compression and increased output error. Therefore, RSENSE must be selected so that ILOAD × RSENSE ≤ 100mV - e.g., 10mΩ for 10A max load - as defined in MAX4374HEUB-T application guidance.
How does the MAX4374HEUB-T handle supply voltage transients?
The MAX4374HEUB-T recommends a 0.1µF ceramic capacitor between VCC and GND to suppress fast transients. For severe cases (e.g., hot-plug battery events), adding a 1kΩ series resistor forms an RC filter that slows VCC rise time without impacting operation - since MAX4374HEUB-T draws only 50µA, the resulting 50mV drop is negligible. This protects internal circuitry while preserving MAX4374HEUB-T functionality during line disturbances.
Can the MAX4374HEUB-T operate with a 1.8V supply?
No. The MAX4374HEUB-T requires a minimum supply voltage of +2.7V to operate within specification. Below 2.7V, comparator latch behavior, reference accuracy, and amplifier output swing are not guaranteed. While some functionality may appear at 1.8V, MAX4374HEUB-T is not characterized or rated for operation below its specified +2.7V minimum - use only within the validated +2.7V to +28V range.
MAX4374HEUB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Current Sensing, Power Management
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-uMAX/uSOP
MAX4374HEUB-T FAQ
1.How can I place an order for MAX4374HEUB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4374HEUB-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 MAX4374HEUB-T reliable?
The price and inventory of MAX4374HEUB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4374HEUB-T is usually 5 days.
3.What payment methods are accepted for MAX4374HEUB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4374HEUB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4374HEUB-T?
MAX4374HEUB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4374HEUB-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 MAX4374HEUB-T?
For technical support, including MAX4374HEUB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4374HEUB-T requirements.
6.How does Aetrix verify that MAX4374HEUB-T is sourced from the original manufacturer or authorized distributors?
All MAX4374HEUB-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 MAX4374HEUB-T meets industry standards.
7.What is the process for return or replacement of MAX4374HEUB-T?
All MAX4374HEUB-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4374HEUB-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 MAX4374HEUB-T part is unused and in its original packaging.
Return procedure for MAX4374HEUB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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