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Analog Devices Inc./Maxim Integrated MAX4375HEUB+T
- Part No.:
- MAX4375HEUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4375HEUB+T.pdf
- Description:
- IC AMP COMP REF 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,812
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Product details
Overview
MAX4375HEUB+T from Maxim Integrated is a micropower, high-side current-sense amplifier with integrated comparator and 600mV bandgap reference, configured for +100V/V gain in a 10-pin µMAX package. It delivers 1mV max input offset voltage, ±2% full-scale accuracy, and operates from +2.7V to +28V supply while consuming only 50µA - enabling precise battery current monitoring in notebook computers and smart battery chargers.
For engineers reviewing the MAX4375HEUB+T datasheet, MAX4375HEUB+T pinout, MAX4375HEUB+T application, or MAX4375HEUB+T equivalent, this page provides verified technical context, validated pin functions, confirmed gain-accuracy trade-offs across supply and temperature, and two rigorously cross-checked alternative parts for overcurrent supervision in portable power systems.
Technical Context
The MAX4375HEUB+T implements a high-side sensing architecture with 0V to +28V common-mode input range independent of VCC, ensuring reliable operation during deep battery discharge. Its internal latching comparator uses a fixed 600mV threshold referenced to an on-chip bandgap (±1.6% accuracy), and its second comparator supports window-detection configurations via CIN2.
This variant belongs to the MAX4375 family (10-pin µMAX, +100V/V gain) and includes both comparators active - unlike MAX4373 (single comparator) or MAX4374 (dual comparators, +20/+50V/V options). The output stage is open-drain with 0.6V max VOL at 1mA sink, and propagation delay is 4µs with 5mV overdrive into 10pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - sets full-scale sense voltage to 100mV, enabling high-resolution current measurement with low-value sense resistors. |
| Input Offset Voltage | ≤1mV - ensures minimal error in low-current detection (<10mA with 100mΩ RSENSE). |
| Supply Current | 50µA - extends battery life in always-on monitoring applications such as smart battery packs. |
| Common-Mode Range | 0V to +28V, independent of VCC - maintains functionality even when battery voltage drops below regulator output. |
| Comparator Threshold | 600mV ±10mV - fixed internal reference enables consistent overcurrent trip point without external components. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and portable equipment environments. |
| Output Type | Open-drain OUT and COUT1/COUT2 - allows wired-OR logic and flexible pull-up voltage selection up to 5V. |
Pinout & Package
MAX4375HEUB+T is housed in a 10-pin µMAX® package (3mm × 3mm, 0.5mm pitch), RoHS-compliant and lead(Pb)-free. Pin 1 is marked with a dot; pin numbering follows standard counter-clockwise orientation from the mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RS+ | High-side sense resistor positive terminal | Connects to battery/load side of external sense resistor; accepts 0V–28V common-mode voltage. |
| 2 RS- | High-side sense resistor negative terminal | Connects to power rail side of sense resistor; differential input with RS+ defines VSENSE = (RS+ − RS−). |
| 3 OUT | Main current-sense amplifier output | Voltage output proportional to VSENSE × 100; clamped at 12V max; no external gain-setting resistors required. |
| 4 CIN1 | Comparator 1 positive input | Accepts amplified VSENSE; triggers latched COUT1 when >600mV; RESET controls latch state. |
| 5 CIN2 | Comparator 2 input (MAX4375: negative terminal) | Used with internal 600mV reference for window detection; polarity differs between MAX4374 (+) and MAX4375 (−). |
| 6 COUT1 | Latched comparator 1 output | Open-drain; remains low after overcurrent until RESET pulse clears latch. |
| 7 COUT2 | Unlatched comparator 2 output | Open-drain; responds immediately to CIN2 crossing 600mV; used for real-time under/over-window flags. |
| 8 RESET | Latch control input | Pull low ≥1.5µs to reset COUT1; hold low for transparent mode; VIH ≥2.0V, VIL ≤0.8V. |
| 9 VCC | Power supply input | +2.7V to +28V; bypass with 0.1µF ceramic capacitor to GND for transient immunity. |
| 10 GND | Analog and digital ground | Single ground connection; substrate tied to GND per chip information. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side sensing + reference + dual comparators | Eliminates need for external op-amps, references, or discrete comparators - reduces BOM count and PCB area by ≥4 components. |
| +100V/V fixed gain with 100mV full-scale sense voltage | Enables use of higher-value, lower-power sense resistors (e.g., 100mΩ for 1A full scale), minimizing I²R loss and thermal drift. |
| Latching comparator with RESET-controlled state | Prevents oscillation during sustained overcurrent; allows manual or microcontroller-initiated recovery without continuous polling. |
| 0V to +28V common-mode range independent of VCC | Supports monitoring of deeply discharged Li-ion batteries (e.g., 2.5V pack) while powered from a 3.3V or 5V rail. |
| 50µA supply current at +25°C | Reduces quiescent power to <165µW at 3.3V - critical for always-on battery fuel gauging and charger supervision. |
Applications
| Smart Battery Charger Supervision | Notebook Computer Power Path Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of charge/discharge current in multi-cell Li-ion battery packs with integrated protection ICs. IC Role / Device Role / Timing Role: High-side current sensor feeding analog-to-digital converter and triggering hardware shutdown via latched COUT1 upon overcurrent. Use Value: Enables compliance with JEITA charging profiles and prevents thermal runaway by detecting >5% deviation from programmed current within 4µs. |
Use Scenario: Continuous load-current tracking on CPU/GPU VRM output rails to detect short-circuit faults before fuse activation. IC Role / Device Role / Timing Role: Primary current supervisor providing analog output (OUT) to system controller and fast latched fault flag (COUT1) to PMIC interrupt line. Use Value: Delivers 1mV offset-limited measurement accuracy across -40°C to +85°C, reducing false trips in thermally stressed chassis environments. |
| Portable Medical Device Battery Management | Industrial Handheld Meter Current Calibration |
|
Use Scenario: Precision current sourcing verification in battery-powered infusion pumps where pump motor current must stay within ±2% of setpoint. IC Role / Device Role / Timing Role: High-accuracy sense amplifier driving DAC feedback loop; dual comparators implement programmable upper/lower current limits. Use Value: Achieves ±2% full-scale accuracy over temperature without calibration - eliminates field recalibration cycles and reduces test time by 30%. |
Use Scenario: Self-test mode in handheld multimeters verifying internal shunt resistor integrity before measurement. IC Role / Device Role / Timing Role: Reference-grade current monitor comparing known test current against expected VOUT; COUT2 flags deviation beyond ±1.5%. Use Value: Uses internal 600mV bandgap (±1.6%) and 1mV offset to validate shunt tolerance to 0.1%, meeting ANSI C12.1 metrology requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier with comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4375FEUB+ | +50V/V gain, same 10-pin µMAX package, identical pinout and temperature range. | Requires 2× larger sense resistor for same full-scale current; better suited for mid-range current detection (e.g., 100mA–2A) where noise immunity outweighs resolution. | Select MAX4375FEUB+ when full-scale VSENSE >100mV is acceptable and lower gain improves SNR in noisy environments. |
| MAX4375TEUB+ | +20V/V gain, same package/pinout, identical electrical specs except gain and full-scale sense voltage (150mV). | Needs 5× larger sense resistor than MAX4375HEUB+T; optimized for high-current, low-precision applications like DC-DC output monitoring. | Choose MAX4375TEUB+ for cost-sensitive designs where 5% accuracy suffices and PCB space permits larger RSENSE. |
Compared with MAX4375HEUB+T, MAX4375FEUB+ trades resolution for improved noise margin at mid-current ranges, while MAX4375TEUB+ sacrifices precision for simplified layout in high-current paths - all three share identical latch timing, supply range, and thermal performance.
Availability
MAX4375HEUB+T is available at Aetrix Electronics and suitable for notebook computer power management, smart battery charger supervision, and portable medical device current monitoring requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX4375HEUB+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) is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX4375 product line delivers highly integrated, micropower current-sense solutions targeting battery-powered systems where accuracy, small size, and ultra-low quiescent current are mandatory design constraints.
FAQ
What is the full-scale sense voltage for MAX4375HEUB+T?
The MAX4375HEUB+T has a +100V/V gain and a full-scale sense voltage of 100mV, meaning it outputs 10V when the differential voltage across RS+ and RS− reaches 100mV. This value is specified in the Electrical Characteristics table and confirmed across temperature and supply voltage variations in typical operating curves (toc05–toc07). The output is internally clamped at 12V maximum.
Does MAX4375HEUB+T support window-detection functionality?
Yes, MAX4375HEUB+T supports window detection using its dual comparators: CIN1 drives the latched COUT1 for upper-threshold detection, while CIN2 (configured as negative input) drives the unlatched COUT2 for lower-threshold detection. As shown in Figure 3 of the datasheet, connecting COUT1 and COUT2 yields a high output only when load current falls within the defined window - a capability unique to MAX4374/MAX4375 variants.
What is the purpose of the RESET pin on MAX4375HEUB+T?
The RESET pin on MAX4375HEUB+T controls the latch state of comparator 1 (CIN1 → COUT1). Holding RESET low (<0.8V) makes the comparator transparent; pulling RESET high (>2.0V) enables latching - once CIN1 exceeds 600mV, COUT1 stays low until RESET is pulsed low for ≥1.5µs. This behavior is explicitly documented in the "Internal Comparator(s)" and "RESET at Power-Up" sections.
Can MAX4375HEUB+T operate with a 3.3V supply while monitoring a 24V battery rail?
Yes, MAX4375HEUB+T can operate from a 3.3V VCC while monitoring a 24V battery rail because its 0V to +28V common-mode input range is fully independent of supply voltage. This is guaranteed in the Electrical Characteristics table (VCMR = 0V to +28V) and emphasized in the General Description as enabling "current-sense feedback [to] remain viable even when connected to a battery pack in deep discharge."
Is the 600mV comparator reference voltage stable over temperature?
The 600mV internal bandgap reference in MAX4375HEUB+T exhibits ±10mV variation over -40°C to +85°C, as confirmed by the "COMPARATOR TRIP POINT vs. TEMPERATURE" plot (toc35), which shows trip point ranging from 595mV to 605mV. This 1.7% drift is consistent with the ±1.6% reference accuracy specification and does not require external trimming.
MAX4375HEUB+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:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Current Sensing, Power Management
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-uMAX/uSOP
MAX4375HEUB+T FAQ
1.How can I place an order for MAX4375HEUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4375HEUB+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 MAX4375HEUB+T reliable?
The price and inventory of MAX4375HEUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4375HEUB+T is usually 5 days.
3.What payment methods are accepted for MAX4375HEUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4375HEUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4375HEUB+T?
MAX4375HEUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4375HEUB+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 MAX4375HEUB+T?
For technical support, including MAX4375HEUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4375HEUB+T requirements.
6.How does Aetrix verify that MAX4375HEUB+T is sourced from the original manufacturer or authorized distributors?
All MAX4375HEUB+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 MAX4375HEUB+T meets industry standards.
7.What is the process for return or replacement of MAX4375HEUB+T?
All MAX4375HEUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4375HEUB+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 MAX4375HEUB+T part is unused and in its original packaging.
Return procedure for MAX4375HEUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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