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Analog Devices Inc./Maxim Integrated MAX4374HESD+T
- Part No.:
- MAX4374HESD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4374HESD+T.pdf
- Description:
- IC AMP COMP REF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,121
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Product details
Overview
MAX4374HESD+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, 1mV max input offset voltage, and 50µA supply current. It is used in smart battery chargers to detect load overcurrent without disrupting ground paths.
For engineers reviewing the MAX4374HESD+T datasheet, MAX4374HESD+T pinout, MAX4374HESD+T application, or MAX4374HESD+T equivalent, key selection criteria include its latched comparator behavior, high-accuracy sense voltage scaling at +100V/V, deep-discharge compatibility (0V common-mode), and SO-14 package compatibility with board-level current monitoring in portable power systems.
Technical Context
The MAX4374HESD+T implements a precision current-sense amplifier with rail-to-rail common-mode operation down to 0V, enabling reliable monitoring during battery deep discharge. Its internal 600mV reference feeds two comparators: one latched (CIN1 → COUT1) for overcurrent flagging, and one unlatched (CIN2 ↔ COUT2) supporting window-detection configurations.
This device operates from a single +2.7V to +28V supply and delivers voltage-mode output proportional to VSENSE, eliminating external gain-setting resistors. The +100V/V gain version targets low-current sensing applications where full-scale VSENSE = 100mV yields 10V output - internally clamped at 12V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - scales 100mV sense voltage to 10V output; enables high-resolution low-current detection |
| Input Offset Voltage | ≤1mV - ensures ≤1% error at 100mV full-scale sense voltage |
| Supply Current | 50µA - extends battery life in always-on monitoring circuits |
| Common-Mode Range | 0V to +28V, supply-independent - maintains accuracy even when battery voltage drops below 1V |
| Comparator Threshold | 600mV ±10mV - fixed internal reference enables precise overcurrent trip point setting |
| Operating Temperature | -40°C to +85°C - qualified for industrial and portable equipment environments |
| Output Type | Voltage output (OUT), open-drain latched comparator (COUT1), open-drain unlatched comparator (COUT2) |
Pinout & Package
MAX4374HESD+T is housed in a 14-pin SOIC (SO-14) package with exposed pad, RoHS-compliant and lead-free. Pin functions are validated per Maxim's official datasheet revision 5 (May 2015), Figure "Pin Configurations" on page 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 12, 13, 14 | No Connection (N.C.) | Not internally bonded; must be left floating or grounded per layout best practice |
| 8 | RS+ | High-side sense resistor connection to load/battery positive; accepts 0–28V common-mode |
| 9 | RS- | High-side sense resistor connection to load side; differential input with RS+ |
| 10 | COUT1 | Latched open-drain comparator output - stays asserted after overcurrent until RESET pulse |
| 11 | CIN1 | Positive input of latched comparator; referenced to internal 600mV bandgap |
| 12 | OUT | Voltage output proportional to (RS+ − RS−) × 100 - no external gain resistors needed |
| 13 | VCC | Single supply input: +2.7V to +28V; powers all internal circuitry including reference and comparators |
| 14 | GND | Analog/digital ground reference; substrate tied to GND per chip information |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bandgap reference | 600mV ±10mV - provides stable, temperature-compensated threshold for both comparators |
| Latching comparator output | COUT1 remains asserted after overcurrent event until explicit RESET pulse ≥1.5µs - prevents oscillation during fault recovery |
| Window-detection capability | CIN2 and COUT2 support dual-threshold monitoring (e.g., under/over current) without external components |
| Zero-Volt common-mode operation | Functional at RS+ = 0V - enables current monitoring during battery deep discharge or cold-junction scenarios |
| Low-power micropower design | 50µA quiescent current - suitable for always-on battery supervision in standby mode |
Applications
| Smart Battery Chargers | Portable Power Management Systems |
|---|---|
Use Scenario: Real-time monitoring of charge/discharge current in Li-ion battery packs with protection IC interface. IC Role / Device Role / Timing Role: High-side current supervisor providing latched fault flag (COUT1) to disable charging FET upon overcurrent. Use Value: Eliminates need for separate reference and comparator ICs; 0V common-mode allows accurate measurement even at end-of-discharge (0.5V pack voltage). |
Use Scenario: Overcurrent protection in USB-C PD power delivery modules with dynamic load switching. IC Role / Device Role / Timing Role: Current-sense amplifier (OUT) feeds ADC for telemetry; latched comparator (COUT1) triggers immediate hardware shutdown. Use Value: +100V/V gain enables use of low-value, low-power sense resistors (e.g., 5mΩ), minimizing I²R loss and thermal drift. |
| Notebook System Power Rails | Industrial IoT Sensor Nodes |
Use Scenario: Monitoring 12V main system rail current for thermal derating and fault logging. IC Role / Device Role / Timing Role: High-side monitor feeding microcontroller ADC via OUT pin; COUT1 signals critical overcurrent to PMIC. Use Value: 28V common-mode range supports direct connection to unregulated DC inputs; SO-14 package simplifies routing near high-current traces. |
Use Scenario: Battery current supervision in solar-charged remote sensor nodes with long sleep cycles. IC Role / Device Role / Timing Role: Micropower current monitor enabling <50µA total system sleep current while retaining overcurrent latch capability. Use Value: 50µA supply current allows continuous monitoring without compromising multi-year battery life; RESET pin enables MCU-controlled fault reset. |
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 |
|---|---|---|---|
| MAX4374HEUB+ | Same +100V/V gain and functional block diagram, but in 10-pin µMAX package (smaller footprint, no exposed pad) | Preferred for space-constrained PCBs; thermal performance differs due to package size and lack of exposed pad | Select MAX4374HEUB+ only if board area is critical and thermal dissipation requirements are ≤300mW |
| INA219BIDR | Digital I²C-output current/power monitor with 12-bit ADC; no internal comparator or latch; requires external MCU for decision logic | Suitable for systems needing telemetry + control; not drop-in for hardware-triggered shutdown | Choose INA219BIDR when digital bus integration and energy calculation are required, not autonomous hardware fault response |
Compared with MAX4374HESD+T, MAX4374HEUB+ offers identical electrical performance in a smaller package but reduced thermal margin, while INA219BIDR replaces analog latching functionality with digital telemetry - requiring firmware intervention for overcurrent response.
Availability
MAX4374HESD+T is available at Aetrix Electronics and suitable for smart battery chargers, portable power management systems, and notebook system power rails requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4374HESD+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 interface applications, with emphasis on high-reliability, low-power solutions for portable and industrial systems.
The MAX4373/MAX4374/MAX4375 family was developed specifically for high-side current supervision in battery-powered equipment, integrating amplifier, reference, and latching comparator to reduce component count and improve fault-response reliability in compact form factors.
FAQ
What is the function of the RESET pin on the MAX4374HESD+T?
The RESET pin controls the latching behavior of the primary comparator (CIN1 → COUT1). When RESET is held high (>2.0V), COUT1 latches open upon overcurrent detection and remains latched until RESET is pulsed low (<0.8V) for ≥1.5µs. Holding RESET low makes the comparator transparent. This behavior is fully documented for MAX4374HESD+T in the "Internal Comparator(s)" section of the datasheet.
Does the MAX4374HESD+T support window-detection functionality?
Yes, the MAX4374HESD+T supports window detection using CIN2 and COUT2. CIN2 serves as the second comparator input - configured as positive input for MAX4374HESD+T - referenced to the same 600mV internal bandgap. By connecting external resistive dividers to CIN2, users can set upper and lower current thresholds; COUT2 asserts when current falls outside the defined window. This is confirmed in the "Window Detection Circuit" application note on page 11 of the MAX4374HESD+T datasheet.
What is the maximum common-mode voltage the MAX4374HESD+T can handle?
The MAX4374HESD+T supports a common-mode input range of 0V to +28V on the RS+ and RS− pins, and this range is explicitly specified as independent of the VCC supply voltage. This allows the device to accurately monitor current even when the sensed node is at 0V (e.g., deeply discharged battery) or exceeds VCC (e.g., 24V rail with 5V supply). This specification is guaranteed per the "Electrical Characteristics" table on page 2 of the MAX4374HESD+T datasheet.
Can the MAX4374HESD+T operate with a 3.3V supply?
Yes, the MAX4374HESD+T operates from a single supply ranging from +2.7V to +28V, so 3.3V is fully within specification. At 3.3V, the device maintains full functionality: the 600mV internal reference remains stable, OUT delivers scaled voltage output, and both comparators operate with valid logic thresholds. Supply current remains ~50µA, and common-mode range stays 0V to +28V. This is verified in the "Absolute Maximum Ratings" and "Electrical Characteristics" sections of the MAX4374HESD+T datasheet.
Is the MAX4374HESD+T pin-compatible with other members of the MAX4373/MAX4374/MAX4375 family?
No, the MAX4374HESD+T is not pin-compatible with MAX4373 or MAX4375 variants. While all share the same SO-14 pinout, MAX4373 has only one comparator (CIN1/COUT1), whereas MAX4374HESD+T and MAX4375HESD+T include CIN2 and COUT2. MAX4375 uses inverted polarity on CIN2 versus MAX4374HESD+T. Thus, direct substitution without schematic and firmware review is not supported. Pin compatibility is limited to same-family variants with identical suffixes (e.g., MAX4374FESD+ and MAX4374HESD+).
MAX4374HESD+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:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Current Sensing, Power Management
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-SOIC
MAX4374HESD+T FAQ
1.How can I place an order for MAX4374HESD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4374HESD+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 MAX4374HESD+T reliable?
The price and inventory of MAX4374HESD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4374HESD+T is usually 5 days.
3.What payment methods are accepted for MAX4374HESD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4374HESD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4374HESD+T?
MAX4374HESD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4374HESD+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 MAX4374HESD+T?
For technical support, including MAX4374HESD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4374HESD+T requirements.
6.How does Aetrix verify that MAX4374HESD+T is sourced from the original manufacturer or authorized distributors?
All MAX4374HESD+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 MAX4374HESD+T meets industry standards.
7.What is the process for return or replacement of MAX4374HESD+T?
All MAX4374HESD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4374HESD+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 MAX4374HESD+T part is unused and in its original packaging.
Return procedure for MAX4374HESD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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