ADM709TAN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision, Low Power Consumption
• Package: 8-Pin PDIP (Plastic Dual In-Line Package)
• Essence: Monitors and controls the voltage level of a power supply
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Options: 2.93V, 3.08V, 3.15V, 3.30V, 3.45V, 4.38V, 4.63V, 4.75V
• Reset Timeout Period: 140ms, 280ms, 560ms, 1120ms
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. GND: Ground connection
2. RESET: Active-low reset output
3. MR: Manual reset input
4. VCC: Positive supply voltage
5. TH: Threshold voltage selection input
6. CT: Capacitor connection for reset timeout period
7. RESET: Active-low reset output
8. NC: No connection

Functional Features

• Monitors the power supply voltage and asserts a reset signal when it falls below a specified threshold.
• Provides a manual reset option through the MR pin.
• Offers various threshold voltage options to suit different applications.
• Allows customization of the reset timeout period using an external capacitor.

Advantages

• High precision in monitoring voltage levels.
• Low power consumption, making it suitable for battery-powered devices.
• Wide operating voltage range enables compatibility with various power supplies.
• Flexible threshold voltage options cater to different system requirements.
• Manual reset capability adds versatility to the device.

Disadvantages

• Limited number of threshold voltage options available.
• Lack of built-in hysteresis may lead to potential oscillations near the threshold voltage.

Working Principles

The ADM709TAN is a voltage supervisor IC that continuously monitors the power supply voltage. It compares the supply voltage with a user-defined threshold voltage and asserts a reset signal when the supply voltage falls below this threshold. The reset signal remains active until the supply voltage rises above the threshold or a manual reset is triggered.

To set the desired threshold voltage, the TH pin is connected to the appropriate voltage level. The reset timeout period can be adjusted by connecting an external capacitor to the CT pin. This allows customization of the time delay before the reset signal is released after the supply voltage returns to normal.

Detailed Application Field Plans

The ADM709TAN finds applications in various electronic systems where reliable voltage monitoring is crucial. Some potential application fields include:

1. Microcontrollers: Ensuring proper operation by resetting the system when the power supply voltage drops below a safe level.
2. Industrial Control Systems: Preventing damage to sensitive equipment by initiating a shutdown sequence during power supply fluctuations.
3. Automotive Electronics: Protecting critical components from voltage dips and spikes, enhancing overall system reliability.
4. Battery-Powered Devices: Extending battery life by triggering a low-power mode or shutdown when the battery voltage reaches a critical level.

Detailed and Complete Alternative Models

1. ADM708TAN: Similar functionality but with different threshold voltage options.
2. ADM810TAN: Voltage supervisor with a fixed threshold voltage and adjustable reset timeout period.
3. MAX809TAN: Low-power microprocessor reset circuit with a fixed threshold voltage and integrated watchdog timer.

(Note: These alternative models are provided for reference purposes and may have slight variations in specifications and features.)

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