ADM693AANZ

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Generator
• Characteristics: Low Power, Precision Monitoring, Wide Supply Voltage Range
• Package: 8-Pin PDIP (Plastic Dual In-Line Package)
• Essence: Provides voltage monitoring and reset generation functionality for electronic systems.
• Packaging/Quantity: Available in tubes or reels, with a quantity of 1000 units per tube/reel.

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Reset Threshold Voltage: Adjustable from 2.93V to 4.63V
• Reset Timeout Period: Fixed at 140ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 30µA (typical)

Pin Configuration

The ADM693AANZ IC has the following pin configuration:

┌───┬───┐ │ 1 │ 8 │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ 4 │ 5 │ └───┴───┘

Pin Description: 1. VCC: Positive supply voltage input 2. GND: Ground reference 3. MR: Manual Reset input 4. RESET: Active-low reset output 5. VOUT: Voltage monitor output 6. THRES: Threshold adjust input 7. CT: Capacitor connection for reset timeout period 8. VCC: Positive supply voltage input

Functional Features

• Monitors the supply voltage and generates a reset signal when the voltage falls below a certain threshold.
• Provides an adjustable threshold voltage to accommodate different system requirements.
• Offers a fixed reset timeout period to ensure proper system reset.
• Low quiescent current consumption, making it suitable for battery-powered applications.
• Wide supply voltage range allows compatibility with various power sources.

Advantages and Disadvantages

Advantages: - Precise voltage monitoring ensures reliable system operation. - Adjustable threshold voltage provides flexibility for different voltage levels. - Low power consumption extends battery life in portable devices. - Wide supply voltage range enhances compatibility with different power sources.

Disadvantages: - Fixed reset timeout period may not be suitable for all applications. - Limited pin configuration options may restrict its use in complex systems.

Working Principles

The ADM693AANZ monitors the supply voltage by comparing it with an internally set threshold voltage. When the supply voltage drops below the threshold, the reset output is activated, indicating a low-voltage condition. The reset output remains active until the supply voltage rises above the threshold or a manual reset signal is applied.

The threshold voltage can be adjusted using an external resistor connected to the THRES pin. This allows customization of the voltage level at which the reset signal is generated.

The reset timeout period is fixed at 140ms, ensuring that the reset signal remains active for a sufficient duration to allow the system to stabilize after power-up or voltage recovery.

Application Field Plans

The ADM693AANZ is commonly used in various electronic systems where voltage monitoring and reset generation are critical. Some potential application fields include:

1. Microcontroller-based Systems: Ensures proper initialization and reliable operation of microcontrollers by monitoring the supply voltage and generating a reset signal when necessary.
2. Embedded Systems: Provides voltage supervision and reset functionality for embedded systems, preventing erratic behavior due to insufficient power supply.
3. Industrial Control Systems: Monitors power supply integrity in industrial control systems, ensuring safe and reliable operation.
4. Automotive Electronics: Protects automotive electronic systems from voltage fluctuations and ensures proper system reset during power cycling.

Alternative Models

1. ADM691AANZ: Similar functionality with a different pin configuration (14-Pin PDIP).
2. ADM695AANZ: Enhanced version with additional features such as watchdog timer and adjustable reset timeout period.
3. MAX809: Equivalent IC from Maxim Integrated, offering similar voltage monitoring and reset generation capabilities.

Note: This is not an exhaustive list of alternative models, and it is recommended to consult the manufacturer's documentation for a complete range of options.

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