ADM709SAR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision, Low Power Consumption
• Package: Small Outline Integrated Circuit (SOIC)
• Essence: Monitors and controls the voltage level in electronic systems
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Threshold Voltage Options: 2.5V, 3.0V, 3.3V, 5.0V
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)

Detailed Pin Configuration

The ADM709SAR has a total of 8 pins:

1. VCC: Supply Voltage Input
2. GND: Ground
3. RESET: Active-Low Reset Output
4. MR: Manual Reset Input
5. CT: Capacitor Connection for Reset Timeout
6. TH: Threshold Voltage Selection
7. NC: No Connection
8. NC: No Connection

Functional Features

• Monitors the supply voltage and asserts the reset output when it falls below the threshold voltage.
• Provides an adjustable reset timeout period to ensure proper system initialization.
• Offers a manual reset input for immediate system reset.
• Allows selection of the threshold voltage to suit different applications.

Advantages and Disadvantages

Advantages: - High precision voltage monitoring - Low power consumption - Adjustable reset timeout period - Wide operating temperature range

Disadvantages: - Limited threshold voltage options - No internal pull-up resistor on the manual reset input

Working Principles

The ADM709SAR is designed to monitor the supply voltage of electronic systems. It compares the input voltage with a reference voltage set by the threshold pin (TH). If the supply voltage drops below the threshold voltage, the reset output (RESET) is asserted low. The reset output remains low until the supply voltage rises above the threshold voltage and the reset timeout period elapses.

Detailed Application Field Plans

The ADM709SAR is commonly used in various applications, including:

1. Microcontrollers: Ensures proper system initialization and prevents erratic behavior during power-up or brownout conditions.
2. Industrial Control Systems: Monitors power supply stability to prevent damage to sensitive equipment.
3. Automotive Electronics: Provides reliable reset signals for microcontrollers and other critical components.
4. Battery-Powered Devices: Extends battery life by efficiently monitoring and controlling power consumption.

Detailed and Complete Alternative Models

• MAX809: Voltage Supervisor IC with similar features and package options.
• LTC2910: Precision Voltage Monitor with adjustable threshold voltage and additional monitoring functions.
• TPS3808: Ultra-Low Power Voltage Supervisor with wide supply voltage range and small package size.

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