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MAX821UUS+T

MAX821UUS+T

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Monitor
  • Characteristics: Low-power, Precision, Adjustable Threshold
  • Package: SOT-23-3
  • Essence: Monitors voltage levels and provides an output signal based on the threshold set by the user.
  • Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

  • Supply Voltage Range: 1.8V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Threshold Voltage Options: Adjustable from 1.25V to 5V in 100mV steps
  • Quiescent Current: 2µA (typical)
  • Output Type: Active-Low Open-Drain
  • Accuracy: ±1.5% (typical)

Pin Configuration

The MAX821UUS+T has a simple three-pin configuration:

  1. GND: Ground connection
  2. IN: Input voltage to be monitored
  3. OUT: Active-low open-drain output

Functional Features

  • Voltage Monitoring: The MAX821UUS+T monitors the input voltage and compares it with the user-defined threshold voltage.
  • Adjustable Threshold: The threshold voltage can be easily adjusted using external resistors, allowing flexibility in monitoring different voltage levels.
  • Low Power Consumption: With a quiescent current of only 2µA, the MAX821UUS+T is suitable for battery-powered applications.
  • Precision: The device offers high accuracy with a typical deviation of ±1.5%.
  • Open-Drain Output: The active-low open-drain output allows easy interfacing with other digital circuits.

Advantages and Disadvantages

Advantages: - Wide supply voltage range enables compatibility with various systems. - Adjustable threshold voltage provides versatility in voltage monitoring applications. - Low power consumption extends battery life in portable devices. - High accuracy ensures reliable voltage monitoring.

Disadvantages: - Limited number of threshold voltage options (100mV steps). - Open-drain output requires an external pull-up resistor for proper operation.

Working Principles

The MAX821UUS+T operates by comparing the input voltage with the user-defined threshold voltage. When the input voltage exceeds the threshold, the output goes low (active-low). Conversely, when the input voltage falls below the threshold, the output remains high impedance. The threshold voltage can be adjusted using external resistors connected to the IN pin.

Detailed Application Field Plans

The MAX821UUS+T finds applications in various fields, including:

  1. Battery-Powered Systems: It can be used to monitor battery voltage levels and provide low-battery warnings.
  2. Power Management: The device enables voltage monitoring in power supply circuits, ensuring stable operation.
  3. Industrial Control Systems: It can be employed to monitor critical voltage levels in industrial control systems, triggering appropriate actions when thresholds are exceeded.
  4. Automotive Electronics: The MAX821UUS+T is suitable for monitoring automotive battery voltage, enabling early detection of potential issues.

Detailed and Complete Alternative Models

  1. MAX823UUS+T: Similar to MAX821UUS+T, but with a fixed threshold voltage of 2.5V.
  2. MAX824UUS+T: Offers adjustable threshold voltage like MAX821UUS+T, but with a wider supply voltage range of 1.6V to 6V.
  3. MAX825UUS+T: Provides adjustable threshold voltage and features a push-pull output instead of open-drain.

These alternative models offer similar functionality with slight variations in specifications, providing options to suit different application requirements.

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기술 솔루션에 MAX821UUS+T 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.

Sure! Here are 10 common questions and answers related to the application of MAX821UUS+T in technical solutions:

  1. Q: What is the MAX821UUS+T? A: The MAX821UUS+T is a voltage monitor and reset circuit that provides power supply monitoring and reset generation for microcontrollers, DSPs, and other digital systems.

  2. Q: What is the operating voltage range of MAX821UUS+T? A: The operating voltage range of MAX821UUS+T is from 1.2V to 5.5V.

  3. Q: How does MAX821UUS+T monitor the power supply? A: MAX821UUS+T monitors the power supply by comparing the input voltage with a preset threshold voltage. If the input voltage drops below the threshold, it generates a reset signal.

  4. Q: Can I adjust the threshold voltage of MAX821UUS+T? A: No, the threshold voltage of MAX821UUS+T is fixed at a specific value.

  5. Q: What is the typical reset timeout period of MAX821UUS+T? A: The typical reset timeout period of MAX821UUS+T is 140ms.

  6. Q: Can I use MAX821UUS+T in battery-powered applications? A: Yes, MAX821UUS+T can be used in battery-powered applications as it operates within a wide voltage range and has low quiescent current.

  7. Q: Does MAX821UUS+T have any built-in hysteresis? A: Yes, MAX821UUS+T has a built-in hysteresis of typically 50mV to prevent oscillation near the threshold voltage.

  8. Q: Can I use MAX821UUS+T in automotive applications? A: Yes, MAX821UUS+T is suitable for automotive applications as it can withstand automotive voltage transients and has a wide operating temperature range.

  9. Q: What is the package type of MAX821UUS+T? A: MAX821UUS+T is available in a SOT-143 package.

  10. Q: Can I use MAX821UUS+T in industrial control systems? A: Yes, MAX821UUS+T is commonly used in industrial control systems to monitor power supply stability and generate reset signals when necessary.

Please note that these answers are general and may vary depending on the specific requirements and application scenarios. It's always recommended to refer to the datasheet and consult with the manufacturer for detailed information.