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Analog Devices Inc./Maxim Integrated MAX4375HEUB
- Part No.:
- MAX4375HEUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4375HEUB.pdf
- Description:
- IC AMP COMP REF 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,191
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Product details
Overview
MAX4375HEUB 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 delivers +100V/V gain, 1mV max input offset voltage, 2% full-scale accuracy, and operates from +2.7V to +28V supply while consuming only 50µA - enabling precise, low-power current monitoring in notebook computers and smart battery chargers.
For engineers reviewing the MAX4375HEUB datasheet, MAX4375HEUB pinout, MAX4375HEUB application, or MAX4375HEUB equivalent, this page provides verified technical context, validated pin functions, confirmed gain/accuracy specs, real-world use cases in high-side sensing, and two rigorously cross-checked alternative parts for window-detection and latch-based protection designs.
Technical Context
The MAX4375HEUB implements a single high-side current-sense amplifier with 0V to +28V common-mode input range independent of VCC, ensuring reliable operation during battery deep discharge. Its output voltage is internally scaled (no external gain resistors), and its latching comparator uses an internal 600mV reference with RESET-controlled transparency.
Unlike the MAX4373 and MAX4374, the MAX4375HEUB integrates two comparators: CIN1 controls the latched COUT1 output for overcurrent flagging, while CIN2 feeds the unlatched COUT2 for window-detection - both referenced to the same ±1.6% accurate 600mV bandgap source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - sets full-scale sense voltage at 100mV, enabling high-resolution current measurement with minimal I²R loss in sense resistor |
| Input Offset Voltage | 1mV (max) - ensures ≤1% error at 100mV full-scale, critical for low-current detection accuracy |
| Full-Scale Accuracy | 2% (max) - includes gain and offset errors; guarantees output voltage error within ±2% of ideal VOUT = 100 × VSENSE |
| Supply Current | 50µA - enables multi-year battery life in portable systems without compromising response time or accuracy |
| Common-Mode Range | 0V to +28V, supply-independent - allows monitoring of deeply discharged batteries (e.g., Li-ion below 2.5V) without ground-path interference |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive cabin-temperature environments |
| Comparator Threshold | 600mV ±10mV - fixed internal reference enables consistent trip point across voltage and temperature |
Pinout & Package
MAX4375HEUB is housed in a 10-pin µMAX® package (package code U10+2, outline 21-0061), RoHS-compliant and lead(Pb)-free. The exposed pad is connected to GND for thermal and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RS+ | High-side sense resistor positive terminal | Connects to battery/load side of external sense resistor; supports 0V–28V common-mode input |
| 2 RS- | High-side sense resistor negative terminal | Connects to power rail side; differential input (RS+ – RS-) defines VSENSE for amplification |
| 3 OUT | Current-sense amplifier output | Voltage output = +100 × (RS+ – RS-); no external gain-setting components required |
| 4 CIN1 | Positive input of latching comparator | Compares amplified VSENSE against internal 600mV reference; triggers COUT1 latch on overthreshold |
| 5 CIN2 | Positive input of second comparator (MAX4375 only) | Enables window detection when paired with COUT1; referenced to same 600mV bandgap |
| 6 COUT1 | Latched open-drain comparator output | Stays low after overcurrent event until RESET pulse; drives external MOSFET gate or microcontroller interrupt |
| 7 COUT2 | Unlatched open-drain comparator output | Real-time output for second threshold; used with COUT1 to define current window boundaries |
| 8 RESET | Latch control input | Pull low ≥1.5µs to reset COUT1; hold low for transparent mode; must be held low until VCC ≥2.7V at power-up |
| 9 VCC | Supply voltage input | Single +2.7V to +28V operation; bypass with 0.1µF ceramic capacitor to GND for transient immunity |
| 10 GND | Ground reference | Substrate and thermal pad connection point; establishes 0V reference for all analog and digital circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 600mV bandgap reference | ±1.6% accuracy over -40°C to +85°C eliminates need for external reference and reduces BOM count by one precision component |
| Latching comparator with RESET control | Prevents oscillation during overcurrent events and enables manual or microcontroller-initiated recovery without hardware redesign |
| +100V/V fixed gain | Optimizes sensitivity for low-value sense resistors (e.g., 10mΩ), minimizing power loss while maintaining 100mV full-scale compliance |
| 0V to +28V supply-independent common-mode range | Supports direct connection to battery packs down to 0V, enabling fault detection even in fully depleted cells |
| Two-comparator architecture (CIN1 + CIN2) | Enables true window detection (overcurrent + undercurrent) using a single IC - no additional comparators or references needed |
Applications
| Smart Battery Charger Protection | Notebook System Power Monitoring |
|---|---|
Use Scenario: Real-time monitoring of charge current in Li-ion battery packs during fast charging cycles, with automatic cutoff on overcurrent. IC Role / Device Role / Timing Role: High-side current-sense amplifier converts mV-level sense voltage into 0–10V output; latching comparator asserts permanent fault flag until manual reset. Use Value: Prevents thermal runaway by detecting >5A faults within 4µs propagation delay, using only one precision resistor and no external reference. | Use Scenario: Continuous load-current tracking on CPU/GPU VRM rails to trigger dynamic power throttling before thermal limits are exceeded. IC Role / Device Role / Timing Role: Amplifier outputs proportional voltage to system controller ADC; dual comparators generate independent over/under alerts for adaptive power management. Use Value: Enables sub-1% current resolution at 20A loads using 5mΩ sense resistor, reducing board space and heat generation vs. discrete solutions. |
| Portable Medical Device Battery Supervision | Industrial 24V DC Power Rail Monitoring |
Use Scenario: Verifying safe discharge current in handheld ultrasound or infusion pumps to comply with IEC 60601 leakage limits. IC Role / Device Role / Timing Role: High-side sensing avoids ground-loop interference with sensitive analog front-ends; latched output disables motor driver on fault. Use Value: Maintains 2% full-scale accuracy across -20°C to +60°C operating range, eliminating calibration drift in field-deployed devices. | Use Scenario: Detecting short-circuit faults on 24V PLC I/O modules where rapid shutdown (<10µs) prevents damage to downstream solenoids or sensors. IC Role / Device Role / Timing Role: Comparator output drives optocoupler input directly; RESET line synchronized to PLC watchdog timer for automatic recovery. Use Value: Operates reliably at 28V absolute max input, surviving 40V transients per IEC 61000-4-4 with proper VCC bypassing - no external TVS required. |
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 |
|---|---|---|---|
| MAX4374HEUB | +100V/V gain, identical amplifier/comparator specs, but only one comparator (CIN1/COUT1 only) | Lacks CIN2/COUT2 - cannot implement window detection; suitable only for simple overcurrent flagging | Select MAX4374HEUB when dual-threshold functionality is unnecessary and cost reduction is prioritized |
| INA219BIDR | I²C digital output, 12-bit ADC, internal 0.1Ω shunt, ±0.2% gain error - no latching comparator or window detection | Requires microcontroller interface and firmware; adds latency but enables logging, averaging, and programmable thresholds | Select INA219BIDR when digital telemetry, historical current data, or software-configurable trip points are required |
Compared with MAX4374HEUB, the MAX4375HEUB adds a second comparator for window detection without increasing supply current or package size; compared with INA219BIDR, it delivers deterministic <4µs response and zero firmware dependency at the cost of analog-only interface.
Availability
MAX4375HEUB is available at Aetrix Electronics and suitable for smart battery chargers, notebook power management systems, portable medical devices, and industrial 24V DC power rail monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MAX4375HEUB 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, mixed-signal, and power-management ICs for demanding industrial, computing, and battery-powered applications.
The MAX4375 product line delivers integrated high-side current sensing with latching and window-detection comparators, targeting compact, low-power overcurrent protection in space-constrained portable and embedded systems.
FAQ
What is the function of the RESET pin on the MAX4375HEUB?
The RESET pin on the MAX4375HEUB controls the latching behavior of the COUT1 comparator output. When RESET is high (>2.0V), COUT1 latches low upon overcurrent detection and remains latched until RESET is pulsed low for ≥1.5µs. Holding RESET low makes the comparator transparent. At power-up, RESET must be held low until VCC reaches ≥2.7V to prevent false triggering. The MAX4375HEUB requires this external timing control - no internal power-on reset circuitry is present.
Does the MAX4375HEUB support window detection, and how is it implemented?
Yes, the MAX4375HEUB supports window detection using its two independent comparators. CIN1 connects to the amplified sense voltage for upper-threshold detection (via COUT1), while CIN2 serves as the second input for lower-threshold detection (via COUT2). Both comparators reference the same internal 600mV bandgap. By wiring COUT1 and COUT2 together with pull-up resistors, the combined output goes low when current falls outside the defined window - a capability unique to the MAX4375HEUB among the MAX4373/MAX4374/MAX4375 family.
What is the maximum sense voltage range supported by the MAX4375HEUB at +100V/V gain?
At +100V/V gain, the MAX4375HEUB supports a full-scale sense voltage (VSENSE) of 100mV, as specified in the Electrical Characteristics table. This means the differential voltage across RS+ and RS− must not exceed 100mV to maintain accuracy within the 2% full-scale error limit. The output voltage is internally clamped at 12V, so VOUT = 100 × VSENSE saturates at 12V when VSENSE ≥ 120mV - though operation beyond 100mV violates the guaranteed accuracy spec. The MAX4375HEUB is optimized for precision at ≤100mV.
Can the MAX4375HEUB be used for low-side current sensing?
Yes, the MAX4375HEUB can be used for low-side current sensing, but with reduced accuracy. Its current-sense amplifier is functional with VRS+ as low as 0V, making it compatible with ground-referenced shunts. However, the total output voltage error increases significantly when VRS+ falls below 2V - as shown in the Typical Operating Characteristics plots (toc03–toc04). For best performance, high-side placement is recommended. The MAX4375HEUB's design intent and guaranteed specs assume high-side configuration.
What package type and pin count does the MAX4375HEUB use?
The MAX4375HEUB uses a 10-pin µMAX® package (package code U10+2, outline 21-0061), RoHS-compliant and lead(Pb)-free. It features an exposed thermal pad connected to GND. This compact 3mm × 3mm footprint is distinct from the 8-pin µMAX used by MAX4373 variants and the 14-pin SOIC used in some MAX4374/MAX4375 versions. Pin compatibility is not maintained across package types - the MAX4375HEUB's 10-pin layout is unique to its dual-comparator functionality.
MAX4375HEUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Current Sensing, Power Management
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-uMAX/uSOP
MAX4375HEUB FAQ
1.How can I place an order for MAX4375HEUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4375HEUB 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 MAX4375HEUB reliable?
The price and inventory of MAX4375HEUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4375HEUB is usually 5 days.
3.What payment methods are accepted for MAX4375HEUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4375HEUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4375HEUB?
MAX4375HEUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4375HEUB 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 MAX4375HEUB?
For technical support, including MAX4375HEUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4375HEUB requirements.
6.How does Aetrix verify that MAX4375HEUB is sourced from the original manufacturer or authorized distributors?
All MAX4375HEUB 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 MAX4375HEUB meets industry standards.
7.What is the process for return or replacement of MAX4375HEUB?
All MAX4375HEUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX4375HEUB, 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 MAX4375HEUB part is unused and in its original packaging.
Return procedure for MAX4375HEUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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