ADM690AARN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Generator
• Characteristics:
  • Monitors the power supply voltage of a system
  • Generates a reset signal when the voltage falls below a specified threshold
  • Ensures proper operation and prevents data corruption in electronic systems
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Provides reliable voltage monitoring and reset functionality for electronic systems
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Threshold Voltage Options: 4.63V, 4.38V, 4.00V, 3.08V, 2.93V, 2.63V
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 20µA (typical)

Pin Configuration

The ADM690AARN IC has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. MR: Manual reset input (active low)
4. RESET: Reset output
5. VTH: Voltage threshold selection input
6. CT: Capacitor connection for reset timeout adjustment
7. GND: Ground reference
8. VCC: Power supply input

Functional Features

• Voltage Monitoring: Monitors the power supply voltage continuously
• Reset Generation: Generates a reset signal when the voltage falls below the selected threshold
• Manual Reset: Allows for manual reset by asserting the MR pin low
• Adjustable Timeout: The reset signal remains active for a fixed period (adjustable using an external capacitor)
• Power-On Reset: Automatically generates a reset signal during power-up
• Low Power Consumption: Operates with low quiescent current, minimizing power consumption

Advantages and Disadvantages

Advantages: - Provides reliable voltage monitoring and reset functionality - Adjustable threshold voltage for flexibility in different applications - Low power consumption helps conserve energy - Compact package size allows for space-efficient designs

Disadvantages: - Limited threshold voltage options may not suit all voltage monitoring requirements - Manual reset feature requires external control circuitry

Working Principles

The ADM690AARN operates by continuously monitoring the power supply voltage. When the voltage falls below the selected threshold, it generates a reset signal. This reset signal remains active for a fixed period, which can be adjusted using an external capacitor connected to the CT pin. The IC also features a manual reset input (MR) that allows for manual assertion of the reset signal.

During power-up, the ADM690AARN automatically generates a reset signal to ensure proper initialization of the system. The low quiescent current of the IC minimizes power consumption, making it suitable for battery-powered applications.

Application Field Plans

The ADM690AARN finds application in various electronic systems where voltage monitoring and reset generation are critical. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensures proper system initialization and prevents data corruption during power fluctuations.
2. Industrial Control Systems: Provides reliable reset functionality for critical control systems, ensuring safe operation.
3. Communication Equipment: Protects sensitive communication circuits from voltage fluctuations, preventing data loss.
4. Automotive Electronics: Monitors the vehicle's power supply voltage, enabling safe operation and preventing damage to electronic components.

Alternative Models

1. MAX809: Voltage monitor and reset generator with adjustable threshold voltage options.
2. LTC2937: Precision voltage monitor and reset generator with programmable timeout period.
3. TPS3808: Ultra-low-power voltage monitor and reset generator with wide supply voltage range.

These alternative models offer similar functionality to the ADM690AARN and can be considered based on specific application requirements.

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