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Analog Devices Inc./Maxim Integrated MAX4375HESD-T
- Part No.:
- MAX4375HESD-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4375HESD-T.pdf
- Description:
- IC AMP COMP REF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,970
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Product details
Overview
MAX4375HESD-T from Maxim Integrated is a micropower, high-side current-sense amplifier with integrated 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 MAX4375HESD-T datasheet, MAX4375HESD-T pinout, MAX4375HESD-T application, or MAX4375HESD-T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated 14-pin SO package mapping, confirmed pin functions, and two rigorously cross-checked alternative parts for window-detection and latched overcurrent protection use cases.
Technical Context
The MAX4375HESD-T integrates a high-accuracy current-sense amplifier (0V to +28V common-mode range, independent of VCC), a latching comparator referenced to an internal 600mV bandgap (±1.6% accuracy), and a second open-drain comparator for window detection. Its +100V/V fixed gain enables high-resolution sensing with small sense resistors.
It supports true high-side monitoring without ground-path disruption, maintains functionality down to 0V RS+ (e.g., deeply discharged battery packs), and features propagation delay ≤4µs (5mV overdrive) and saturation recovery time <0.1ms - critical for fast fault response in power-management systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - sets output voltage = 100 × (RS+ − RS−); enables 10mV sense voltage to generate 1V output for ADC interfacing. |
| Input Offset Voltage | ≤1mV - ensures ≤1% error at 100mV full-scale sense voltage; critical for low-current precision. |
| Full-Scale Accuracy | ≤2% - total error including gain and offset; guarantees reliable trip-point setting for overcurrent thresholds. |
| Supply Current | 50µA - extends battery life in portable systems; stable across +2.7V to +28V supply range. |
| Common-Mode Range | 0V to +28V - remains functional even when battery pack voltage drops to 0V; no dependency on VCC level. |
| Comparator Threshold | 600mV ±10mV - internal reference used for CIN1/CIN2 comparison; enables accurate current window detection. |
| Propagation Delay | ≤4µs - fast response to overcurrent events; allows timely shutdown before damage occurs. |
Pinout & Package
MAX4375HESD-T is housed in a 14-pin SO (Small Outline) package, RoHS-compliant, with exposed pad for thermal performance. Pinout matches standard SO-14 footprint (outline 21-0041, land pattern 90-0096).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 | Physical pins per SO-14 layout | Exact pin numbering per Maxim's official pin configuration diagram (page 12): RS+, RS−, OUT, CIN1, CIN2, COUT1, COUT2, VCC, GND, RESET, N.C., N.C., N.C., N.C. |
| RS+ | High-side sense resistor positive terminal | Connects to battery/load side of external sense resistor; accepts up to +28V common-mode voltage. |
| RS− | High-side sense resistor negative terminal | Completes differential sense path; voltage difference (RS+ − RS−) is amplified by +100V/V. |
| OUT | Current-sense amplifier output | Voltage output proportional to load current; no external gain-setting resistors required. |
| CIN1 | Positive input of latching comparator | Compares against internal 600mV reference; rising edge >600mV triggers latch and pulls COUT1 open-drain. |
| CIN2 | Second comparator input (negative for MAX4375) | In MAX4375, CIN2 is negative input; paired with internal 600mV reference for lower-bound window detection. |
| COUT1 | Latching open-drain comparator output | Stays open after overcurrent event until RESET pulse; drives external MOSFET gate or microcontroller interrupt. |
| COUT2 | Unlatched open-drain comparator output | Real-time output of second comparator; used for upper-bound detection in window circuits. |
| VCC | Power supply input | Accepts +2.7V to +28V; bypassing with 0.1µF ceramic capacitor mandatory for transient immunity. |
| GND | Analog/digital ground reference | Substrate tied to GND; requires low-impedance connection to minimize noise coupling into sense path. |
| RESET | Latch control input | Pulse low ≥1.5µs to reset COUT1 latch; must be held low during power-up until VCC >2.7V to prevent false triggering. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 600mV bandgap reference | ±1.6% accuracy ensures stable, temperature-invariant trip points for both comparators - eliminates need for external reference ICs. |
| Latching comparator output (COUT1) | Prevents oscillation during sustained overcurrent; maintains fault flag until explicit RESET, simplifying system-level fault handling logic. |
| Dual-comparator architecture | Enables true window detection (e.g., undercurrent + overcurrent) using CIN1/CIN2 and COUT1/COUT2 - reduces component count vs. discrete solutions. |
| 0V to +28V common-mode range | Validates current monitoring even during battery deep discharge (0V RS+) - essential for smart battery pack safety compliance. |
| +100V/V fixed gain | Maximizes signal-to-noise ratio for low-value sense resistors (e.g., 5mΩ), minimizing I²R loss and thermal drift in high-current paths. |
Applications
| Smart Battery Charger Protection | Notebook Computer Power Management |
|---|---|
Use Scenario: Monitoring charge current in Li-ion battery packs during CC/CV charging phases, with automatic cutoff on overcurrent or undercurrent faults. IC Role / Device Role / Timing Role: High-side current supervisor providing latched overcurrent flag (COUT1) and window-detection output (COUT2) to MCU or dedicated charger IC. Use Value: Enables fail-safe termination before cell damage; 0V–28V common-mode range ensures reliability across full battery voltage swing (2.5V–4.35V per cell × 3S/4S). | Use Scenario: Real-time load current monitoring on CPU/GPU VRM rails to trigger thermal throttling or system shutdown during overload. IC Role / Device Role / Timing Role: Precision current-sense amplifier feeding analog input of system PMIC or baseband processor ADC; COUT1 signals immediate fault. Use Value: 1mV max offset and 2% full-scale accuracy allow detection of <50mA deviations on 5A rails - critical for dynamic power budgeting. |
| Portable Medical Device Battery Supervision | Industrial IoT Sensor Node Power Monitoring |
Use Scenario: Ensuring safe operating current in handheld ultrasound or infusion pumps powered by removable Li-ion packs. IC Role / Device Role / Timing Role: Dual-comparator window detector (CIN1/CIN2 → COUT1/COUT2) validating current stays within therapeutic delivery limits. Use Value: Eliminates need for two separate comparators and reference ICs; 50µA quiescent current extends runtime between charges in battery-only operation. | Use Scenario: Verifying correct current draw of LoRaWAN or NB-IoT modems during transmit bursts to detect antenna faults or power supply degradation. IC Role / Device Role / Timing Role: High-speed current supervisor (≤4µs propagation delay) capturing 100ms transmit pulses and flagging anomalies via COUT1. Use Value: Fast response prevents false "no network" diagnostics; +28V common-mode tolerance accommodates wide-input industrial DC supplies (12V–24V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier with dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4375HEUB+ | Same +100V/V gain and electrical specs, but in 10-pin µMAX package (U10+2); smaller footprint, no exposed pad. | Preferred for space-constrained PCBs where thermal mass is less critical; not drop-in compatible due to different pin count and layout. | Select MAX4375HEUB+ when board area is premium and thermal dissipation requirements are moderate. |
| INA219BIDR | 26V max common-mode, I²C digital output, 0.1% gain error, but no integrated comparator or latch; requires external MCU polling. | Suitable for systems with available I²C bus and firmware resources; lacks autonomous fault signaling - cannot replace latched shutdown function. | Choose INA219BIDR only when digital telemetry and high gain accuracy outweigh need for hardware-level fault latching. |
Compared with MAX4375HESD-T, MAX4375HEUB+ offers identical analog performance in a smaller package but requires layout redesign, while INA219BIDR trades autonomous analog fault response for digital precision and configurability - making MAX4375HESD-T uniquely suited for safety-critical, latch-driven overcurrent protection.
Availability
MAX4375HESD-T is available at Aetrix Electronics and suitable for notebook computer power management, smart battery charger protection, and industrial IoT sensor node power monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MAX4375HESD-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, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.
The MAX4373/MAX4374/MAX4375 family was engineered specifically for high-side current supervision in battery-powered systems - integrating amplifier, reference, and dual comparators to eliminate discrete solutions and reduce PCB area in space- and power-sensitive designs.
FAQ
What is the exact gain and full-scale sense voltage of MAX4375HESD-T?
The MAX4375HESD-T has a fixed gain of +100V/V. Its full-scale sense voltage is 100mV - meaning a 100mV differential (RS+ − RS−) produces a 10V output (clamped at 12V). This is confirmed in the Electrical Characteristics table (Note 4) and distinguishes it from the +20V/V and +50V/V variants, which use 150mV full-scale.
Does MAX4375HESD-T support true 0V common-mode operation, and why does that matter?
Yes, MAX4375HESD-T supports 0V to +28V common-mode input range, independent of VCC. This is critical for battery applications: when a Li-ion pack discharges to 0V under load (e.g., protection circuit activation), the device continues monitoring current - ensuring fault detection remains active even in deep-discharge failure modes.
How does the latching comparator in MAX4375HESD-T differ from the second comparator?
The latching comparator (CIN1 → COUT1) locks its open-drain output once triggered above 600mV and holds until RESET is pulsed. The second comparator (CIN2 → COUT2) is unlatched and responds continuously - enabling window detection where COUT1 flags overcurrent and COUT2 flags undercurrent, with combined logic indicating in-window status.
What is the recommended power-supply bypassing strategy for MAX4375HESD-T?
Per Maxim's datasheet (page 11), VCC must be bypassed to GND with ≥0.1µF ceramic capacitor. For systems subject to fast transients (e.g., hot-plug battery insertion), add a 1kΩ series resistor with the 0.1µF cap to form an RC filter - limiting dV/dt without compromising 50µA supply current performance.
Can MAX4375HESD-T be used for low-side current sensing, and what are the trade-offs?
Yes, MAX4375HESD-T can be used for low-side sensing (per Functional Description, page 9), but total output voltage error increases significantly when RS+ falls below 2V. High-side placement is preferred for accuracy and ground-path integrity; low-side use should only occur when layout constraints prohibit high-side placement and error budgets permit.
MAX4375HESD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 14-SOIC
MAX4375HESD-T FAQ
1.How can I place an order for MAX4375HESD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4375HESD-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 MAX4375HESD-T reliable?
The price and inventory of MAX4375HESD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4375HESD-T is usually 5 days.
3.What payment methods are accepted for MAX4375HESD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4375HESD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4375HESD-T?
MAX4375HESD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4375HESD-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 MAX4375HESD-T?
For technical support, including MAX4375HESD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4375HESD-T requirements.
6.How does Aetrix verify that MAX4375HESD-T is sourced from the original manufacturer or authorized distributors?
All MAX4375HESD-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 MAX4375HESD-T meets industry standards.
7.What is the process for return or replacement of MAX4375HESD-T?
All MAX4375HESD-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4375HESD-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 MAX4375HESD-T part is unused and in its original packaging.
Return procedure for MAX4375HESD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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