ADM709RAN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision monitoring, low power consumption, small package size
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: ADM709RAN is a voltage supervisor IC designed to monitor the power supply voltage of electronic systems and provide reset signals when necessary.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Reset Threshold Voltage: Adjustable from 1.8V to 4.6V
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)

Pin Configuration

ADM709RAN features an 8-pin SOIC package with the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. MR: Manual Reset input
4. RESET: Reset output
5. RESET: Reset output
6. GND: Ground reference
7. VCC: Power supply input
8. NC: No connection

Functional Features

• Voltage Monitoring: ADM709RAN continuously monitors the power supply voltage and asserts the reset signal when the voltage falls below the programmed threshold.
• Adjustable Threshold: The reset threshold voltage can be adjusted using external resistors, allowing flexibility in setting the desired voltage level.
• Reset Timeout: The reset signal remains asserted for a programmable timeout period after the voltage rises above the threshold, ensuring stability during power-up.
• Manual Reset: The manual reset input (MR) allows for an external signal to force a reset, overriding the voltage monitoring function.
• Low Power Consumption: The IC operates with low quiescent current, minimizing power consumption in battery-powered applications.

Advantages and Disadvantages

Advantages: - Precision voltage monitoring - Adjustable threshold and timeout period - Small package size - Low power consumption

Disadvantages: - Limited number of pins for additional functionalities - Not suitable for high-voltage applications

Working Principles

ADM709RAN works by comparing the power supply voltage with the programmed threshold voltage. When the supply voltage drops below the threshold, the reset output is asserted, indicating a power failure or unstable voltage condition. The reset signal remains active for the programmable timeout period after the voltage rises above the threshold, ensuring proper system stabilization.

Application Field Plans

ADM709RAN finds applications in various electronic systems where reliable voltage monitoring and reset functionality are crucial. Some potential application fields include:

1. Microcontrollers and microprocessors
2. Embedded systems
3. Industrial control systems
4. Communication equipment
5. Power management circuits
6. Battery-powered devices

Alternative Models

For users seeking alternative options, the following voltage supervisor ICs can be considered:

1. MAX809: Similar functionality with adjustable threshold and timeout period.
2. LTC2937: Offers additional features like watchdog timer and power supply sequencing.
3. TPS3839: Provides ultra-low power consumption and wide operating temperature range.

These alternatives offer similar voltage monitoring capabilities but may have different package sizes, pin configurations, or additional functionalities based on specific requirements.

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