ADM692AANZ

Product Overview

• Category: Integrated Circuit
• Use: Voltage Monitor and Reset Generator
• Characteristics: Low Power, Precision Monitoring, Adjustable Reset Timeout
• Package: 8-Pin PDIP (Plastic Dual In-Line Package)
• Essence: Monitors the voltage level of a power supply and generates a reset signal when the voltage falls below a specified threshold.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Reset Threshold Voltage: Adjustable from 2.55V to 4.63V in 100mV increments
• Reset Timeout Period: Adjustable from 1ms to 640ms in 10ms increments
• Quiescent Current: 20µA typical
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. VCC: Supply Voltage Input
2. GND: Ground
3. MR: Manual Reset Input
4. RESET: Reset Output
5. TO: Timeout Output
6. CT: Capacitor Timing Input
7. TH: Threshold Adjust Input
8. NC: No Connection

Functional Features

• Monitors the supply voltage continuously
• Generates a reset signal when the voltage drops below the set threshold
• Adjustable reset timeout period allows customization for specific applications
• Provides a manual reset input for immediate system reset
• Timeout output indicates when the reset timeout period has elapsed

Advantages

• Low power consumption extends battery life in portable devices
• Precision monitoring ensures reliable operation of the system
• Adjustable reset threshold and timeout allow flexibility in different applications
• Small form factor and easy integration into existing designs
• Cost-effective solution for voltage monitoring and reset generation

Disadvantages

• Limited voltage range may not be suitable for all power supply systems
• Manual reset input requires external control circuitry
• Lack of built-in hysteresis may result in multiple reset signals during voltage fluctuations

Working Principles

The ADM692AANZ monitors the supply voltage by comparing it to an internally set threshold voltage. When the supply voltage falls below this threshold, the reset output is activated, indicating a low voltage condition. The reset signal remains active until the supply voltage rises above the threshold or a timeout period elapses.

The reset timeout period can be adjusted using an external capacitor connected to the CT pin. This allows customization of the reset duration based on the specific requirements of the application.

The manual reset input (MR) provides a means to force an immediate system reset, overriding the voltage monitoring function. When MR is asserted, the reset output is activated regardless of the supply voltage level.

Detailed Application Field Plans

The ADM692AANZ is commonly used in various electronic systems where reliable voltage monitoring and reset generation are critical. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper initialization and safe operation by monitoring the power supply voltage.
2. Industrial Control Systems: Preventing data corruption and ensuring system integrity during power fluctuations.
3. Automotive Electronics: Resetting microcontrollers and other critical components in case of voltage drops or transients.
4. Medical Devices: Guaranteeing the safe operation of medical equipment by monitoring the power supply voltage.
5. Communication Systems: Protecting sensitive circuitry from voltage variations and ensuring continuous operation.

Detailed and Complete Alternative Models

1. ADM691AANZ: Similar functionality with fixed reset threshold and timeout values.
2. ADM693AANZ: Adjustable reset threshold and timeout, with additional watchdog timer feature.
3. MAX691AANZ: Voltage monitor and reset generator with adjustable reset threshold and timeout.
4. MAX823AANZ: Precision voltage monitor with fixed reset threshold and timeout.

These alternative models offer similar functionality to the ADM692AANZ, providing options for different voltage monitoring and reset generation requirements.

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