MAX821MUS+TG002

Product Overview

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

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Threshold Voltage Range: Adjustable from 1.2V to 5V
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 3µA (typical)
• Output Type: Active-Low Open-Drain
• Accuracy: ±1.5% (typical)

Pin Configuration

The MAX821MUS+TG002 has a total of 3 pins:

1. GND: Ground connection
2. IN: Input voltage to be monitored
3. OUT: Output signal indicating voltage status

Functional Features

• Monitors input voltage and compares it with the set threshold.
• Provides an active-low open-drain output signal when the voltage exceeds the threshold.
• Adjustable threshold allows flexibility in voltage monitoring.
• Low quiescent current ensures minimal power consumption.
• Wide supply voltage range enables use in various applications.

Advantages

• Precise voltage monitoring with adjustable threshold.
• Low power consumption extends battery life in portable devices.
• Small package size (SOT-23) saves board space.
• Wide operating temperature range for versatile applications.
• Active-low open-drain output simplifies interfacing with other circuits.

Disadvantages

• Limited accuracy compared to more specialized voltage monitoring ICs.
• Single-channel monitoring, not suitable for multi-channel applications.
• Lack of built-in hysteresis may lead to oscillations near the threshold voltage.

Working Principles

The MAX821MUS+TG002 operates by comparing the input voltage with the set threshold voltage. When the input voltage exceeds the threshold, the output pin is pulled low, indicating an overvoltage condition. The threshold voltage can be adjusted using external resistors, allowing customization for specific applications. The low quiescent current ensures minimal power consumption, making it suitable for battery-powered devices.

Detailed Application Field Plans

The MAX821MUS+TG002 finds applications in various fields, including:

1. Battery-Powered Devices: Monitors battery voltage and triggers actions when it falls below a certain level.
2. Power Supplies: Protects sensitive components by detecting overvoltage conditions and activating shutdown mechanisms.
3. Automotive Electronics: Ensures proper voltage levels in automotive systems, preventing damage to critical components.
4. Industrial Control Systems: Monitors voltage levels in control circuits, triggering alarms or shutdowns in case of anomalies.
5. Home Automation: Detects abnormal voltage levels in household appliances, providing safety and protection.

Detailed and Complete Alternative Models

1. MAX823MUS+TG002: Similar to MAX821MUS+TG002 but with a higher accuracy of ±1%.
2. MAX809MUS+TG002: Voltage monitor with a fixed threshold voltage of 2.93V.
3. MAX675MUS+TG002: Dual-channel voltage monitor with adjustable thresholds for each channel.
4. MAX638MUS+TG002: Voltage monitor with built-in hysteresis for improved noise immunity.

These alternative models offer different features and specifications, catering to specific application requirements.

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