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Analog Devices Inc./Maxim Integrated MAX4374TESD+T
- Part No.:
- MAX4374TESD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4374TESD+T.pdf
- Description:
- IC AMP COMP REF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,333
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Product details
Overview
MAX4374TESD+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 +20V/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 MAX4374TESD+T datasheet, MAX4374TESD+T pinout, MAX4374TESD+T application, or MAX4374TESD+T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts for high-side current sensing in deep-discharge battery systems and portable power management.
Technical Context
The MAX4374TESD+T implements a single high-side current-sense amplifier with fixed +20V/V gain and a latching open-drain comparator referenced to an internal 600mV bandgap. Its 0V to +28V common-mode input range remains functional even when VCC is as low as +2.7V, ensuring reliable operation during battery deep discharge.
It includes a dedicated RESET pin to control latch transparency and reset timing (min 1.5µs pulse width), and supports window detection via CIN2 and dual comparator outputs (COUT1 latched, COUT2 unlatched). The device operates across -40°C to +85°C and consumes only 50µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +20V/V - sets output voltage scaling for 100mV full-scale sense voltage; enables direct interface with 2V ADC inputs using 10mΩ sense resistor at 10A load. |
| Input Offset Voltage | 1mV (max) - limits worst-case current measurement error to ±1% at 100mV sense voltage, critical for precision battery charge/discharge tracking. |
| Common-Mode Range | 0V to +28V, supply-independent - allows monitoring of battery packs down to 0V terminal voltage without loss of functionality or accuracy. |
| Supply Current | 50µA - extends runtime in always-on battery supervision circuits; draws less than 1.2µA per hour in continuous operation. |
| Comparator Threshold | 600mV ±10mV - defines overcurrent trip point; stable over temperature (-40°C to +85°C) with <±1mV/°C drift. |
| Operating Supply | +2.7V to +28V - supports wide-input DC systems including 3.3V microcontrollers, 12V industrial rails, and 24V battery stacks. |
| Output Type | Open-drain OUT (COUT1) with latching - eliminates oscillation during overcurrent events; requires external pull-up (≤5V) for logic-level interfacing. |
Pinout & Package
MAX4374TESD+T is housed in a 14-pin SOIC package (RoHS-compliant, lead-free), with exposed pad thermally connected to GND. Pin assignments are fully validated per Maxim's official datasheet Rev 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 tied to GND per layout best practice - no electrical function or signal path. |
| 8 | RS+ | High-side sense resistor positive terminal - connects directly to battery/anode side; supports up to +28V common-mode voltage. |
| 9 | RS- | High-side sense resistor negative terminal - forms differential input pair with RS+; voltage drop across RS+/RS- is amplified 20×. |
| 10 | COUT1 | Latching open-drain comparator output - goes high-impedance when overcurrent detected; requires external pull-up to logic rail (≤5V). |
| 11 | CIN1 | Comparator 1 positive input - receives amplified sense voltage; trips COUT1 when >600mV relative to internal reference. |
| VCC (Pin 10 not used; VCC = Pin 10 in µMAX, but SO uses Pin 10 for COUT1 - confirmed: VCC = Pin 14 in SO) | VCC | Supply input - powers all internal circuitry; bypassing with 0.1µF ceramic capacitor to GND is mandatory for transient immunity. |
| GND (Pin 8 in µMAX, but SO uses Pin 8 for RS+ - confirmed: GND = Pin 7 in SO) | GND | Analog/digital ground reference - substrate-connected to GND per Chip Information (p.12); must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bandgap reference | 600mV ±1.6% - provides stable, temperature-compensated threshold for overcurrent detection without external components. |
| Latching comparator output | COUT1 remains high-Z after trip until RESET pulse - prevents PWM-like oscillation in power-path shutdown circuits. |
| Supply-independent common-mode range | 0V to +28V regardless of VCC level - ensures uninterrupted current monitoring during battery voltage sag below 2.7V. |
| Low quiescent current | 50µA - reduces parasitic drain in always-on battery fuel gauging applications; enables >1-year shelf life in standby mode. |
| Reset-controlled latch transparency | RESET pin <0.8V makes COUT1 follow CIN1 in real time - supports dynamic enable/disable of overcurrent protection during system boot or recovery. |
Applications
| Smart Battery Charger Supervision | Notebook Computer Power Path Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of charging current into Li-ion battery packs during CC/CV phases, including deep-discharge recovery. IC Role / Device Role / Timing Role: High-side current-sense amplifier + latching comparator detects overcurrent faults and asserts permanent shutdown flag until host MCU issues RESET pulse. Use Value: Eliminates need for external reference or gain-setting resistors; maintains accuracy down to 0V pack voltage, preventing false trips during low-Vbat conditions. |
Use Scenario: Continuous monitoring of CPU/GPU rail current to trigger thermal throttling or graceful shutdown before OCP events. IC Role / Device Role / Timing Role: Provides analog current feedback to system controller while simultaneously generating hardware-level fault flag via COUT1. Use Value: 50µA supply current minimizes impact on battery runtime; +20V/V gain matches typical 10–50mΩ sense resistors used in compact laptop PCB layouts. |
| Portable Medical Device Battery Management | Industrial 24V DC Power Module Protection |
|
Use Scenario: Supervising backup battery current in infusion pumps or portable ECG monitors where safety-critical overcurrent response is required. IC Role / Device Role / Timing Role: Acts as autonomous overcurrent supervisor - latched COUT1 disables power MOSFET without software intervention. Use Value: Guaranteed -40°C to +85°C operation ensures reliability in cold storage or field-deployed environments; 1mV max VOS enables ±1% current accuracy at 1A load. |
Use Scenario: Protecting programmable DC power supplies against short-circuit faults on 24V output rails driving actuators or sensors. IC Role / Device Role / Timing Role: High-side sensing avoids ground loop interference; COUT1 drives external latch/SCR to cut off output instantly upon overcurrent. Use Value: 0V–28V common-mode range accommodates full 24V system swing plus margin; SO-14 package offers robust creepage/clearance for industrial isolation 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 |
|---|---|---|---|
| MAX4373TESA+ | +20V/V gain, 8-pin SO package, single comparator only (no CIN2/COUT2), identical electrical specs except missing window-detection capability. | Suitable for basic overcurrent flagging only - cannot implement current window detection or dual-threshold supervision. | Select when cost and board space are constrained and only latched overcurrent detection is needed. |
| INA219BIDR | I²C digital output, 26V common-mode, 0.1% gain accuracy, integrated ADC and register set - no latching comparator or internal reference. | Requires microcontroller firmware for fault handling; supports bidirectional current, power, and bus voltage reporting - not hardware-autonomous. | Select when system already includes I²C infrastructure and programmable fault response is preferred over hardware latch behavior. |
Compared with MAX4374TESD+T, MAX4373TESA+ removes window-detection capability but saves one package pin and cost, while INA219BIDR replaces analog autonomy with digital configurability and higher precision - trading hardware simplicity for firmware dependency and measurement versatility.
Availability
MAX4374TESD+T is available at Aetrix Electronics and suitable for notebook computers, smart battery chargers, and industrial 24V DC power modules requiring stable component supply with guaranteed long-term manufacturability and RoHS compliance.
Supply support for MAX4374TESD+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, with leadership in high-reliability, low-power solutions for demanding environments.
The MAX4373/MAX4374/MAX4375 family was engineered specifically for autonomous, high-side current supervision in battery-powered systems - integrating amplifier, reference, and latch to eliminate discrete-component complexity and improve fault-response determinism.
FAQ
What is the maximum common-mode voltage supported by MAX4374TESD+T?
MAX4374TESD+T supports a 0V to +28V input common-mode range that is fully independent of its supply voltage (VCC = +2.7V to +28V). This means it can accurately monitor current through a sense resistor even when the battery pack voltage drops to 0V - a critical capability for deep-discharge recovery in Li-ion systems. The specification is guaranteed across the full -40°C to +85°C operating temperature range.
Does MAX4374TESD+T require external gain-setting resistors?
No, MAX4374TESD+T does not require external gain-setting resistors. It integrates a precision +20V/V amplifier stage with laser-trimmed internal resistors, delivering fixed gain without external components. This eliminates resistor tolerance errors and PCB layout sensitivity, simplifying design and improving long-term stability - especially important in space-constrained portable electronics where MAX4374TESD+T is commonly deployed.
How does the latching comparator in MAX4374TESD+T behave after an overcurrent event?
When the amplified sense voltage at CIN1 exceeds 600mV, MAX4374TESD+T's COUT1 output latches into a high-impedance (open-drain) state and remains latched until a valid RESET pulse is applied. A minimum 1.5µs low pulse on the RESET pin resets the latch, restoring normal comparator operation. This prevents oscillation during sustained overcurrent - a key safety feature in battery protection circuits where MAX4374TESD+T is used as a hardware-level fail-safe.
Can MAX4374TESD+T be used for low-side current sensing?
Yes, MAX4374TESD+T can be used for low-side current sensing, but total output voltage error increases significantly when RS+ falls below +2V. The device's optimized performance - including 1mV max input offset and 2% full-scale accuracy - is specified and guaranteed only for high-side configurations with RS+ ≥ +2V. For low-side applications requiring highest accuracy, a dedicated low-side amplifier like MAX4080 should be considered instead of MAX4374TESD+T.
What is the purpose of the CIN2 and COUT2 pins on MAX4374TESD+T?
CIN2 and COUT2 enable window-detection functionality in MAX4374TESD+T. CIN2 serves as the second comparator input (positive for MAX4374), referenced to the same 600mV internal bandgap. COUT2 is its unlatched open-drain output. By connecting COUT1 and COUT2 together, designers can generate a single output that goes low when load current falls outside a defined upper/lower bound - a capability absent in the MAX4373 and essential for battery charge termination or motor stall detection using MAX4374TESD+T.
MAX4374TESD+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
MAX4374TESD+T FAQ
1.How can I place an order for MAX4374TESD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4374TESD+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 MAX4374TESD+T reliable?
The price and inventory of MAX4374TESD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4374TESD+T is usually 5 days.
3.What payment methods are accepted for MAX4374TESD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4374TESD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4374TESD+T?
MAX4374TESD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4374TESD+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 MAX4374TESD+T?
For technical support, including MAX4374TESD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4374TESD+T requirements.
6.How does Aetrix verify that MAX4374TESD+T is sourced from the original manufacturer or authorized distributors?
All MAX4374TESD+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 MAX4374TESD+T meets industry standards.
7.What is the process for return or replacement of MAX4374TESD+T?
All MAX4374TESD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4374TESD+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 MAX4374TESD+T part is unused and in its original packaging.
Return procedure for MAX4374TESD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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