ADM709TAR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics:
  • Monitors the power supply voltage level
  • Generates a reset signal when the voltage falls below a specified threshold
  • Prevents system malfunction during power fluctuations
• Package: TSSOP-8
• Essence: Ensures reliable operation of electronic systems by monitoring and controlling power supply voltage.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Options: 2.63V, 3.08V, 4.38V
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)

Pin Configuration

The ADM709TAR features an 8-pin TSSOP package with the following pin configuration:

┌───┬───┐ │ 1 │ 8 │ │ 2 │ 7 │ │ 3 │ 6 │ │ 4 │ 5 │ └───┴───┘

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

Functional Features

• Monitors the power supply voltage continuously
• Generates a reset signal when the voltage falls below the selected threshold
• Reset signal remains active until the voltage rises above the threshold and the reset timeout period elapses
• Provides manual reset capability through the MR pin
• Adjustable reset timeout period allows customization for specific applications

Advantages

• Ensures reliable system operation by preventing malfunctions during power fluctuations
• Wide supply voltage range enables compatibility with various electronic systems
• Adjustable reset timeout period offers flexibility in different application scenarios
• Small form factor and low quiescent current make it suitable for space-constrained designs

Disadvantages

• Limited threshold voltage options may not cater to all voltage monitoring requirements
• Lack of additional features such as watchdog timer or power-on reset functionality

Working Principles

The ADM709TAR operates by continuously monitoring the power supply voltage using an internal voltage reference. When the voltage falls below the selected threshold, it triggers the generation of a reset signal. This signal remains active until the voltage rises above the threshold and the reset timeout period elapses. The reset timeout period can be adjusted using an external capacitor connected to the CT pin.

Application Field Plans

The ADM709TAR is widely used in various electronic systems where reliable voltage monitoring and reset functionality are crucial. Some potential application fields include:

1. Microcontrollers and Microprocessors
2. Industrial Control Systems
3. Automotive Electronics
4. Power Management Units
5. Communication Equipment

Alternative Models

For users seeking alternative options, the following models provide similar functionality to the ADM709TAR:

1. MAX809: Voltage Supervisors from Maxim Integrated
2. MCP100: Voltage Supervisors from Microchip Technology
3. TPS3808: Voltage Supervisors from Texas Instruments
4. LTC2910: Voltage Supervisors from Linear Technology

These alternative models offer comparable features and can be considered based on specific application requirements.

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