ADM1184ARMZ

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Supply Supervisor
• Characteristics: Monitors and controls power supply voltages
• Package: 8-Lead MSOP (Mini Small Outline Package)
• Essence: Ensures reliable operation of electronic systems by monitoring power supply voltages
• Packaging/Quantity: Tape and Reel, 3,000 units per reel

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Output Type: Active Low, Open Drain
• Reset Threshold Voltage: Adjustable from 1.2V to 4.63V
• Watchdog Timer: Programmable timeout period
• Quiescent Current: 25µA (typical)

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. MR: Manual reset input
4. RESET#: Active low reset output
5. WDI: Watchdog input
6. CT: Capacitor connection for watchdog timer
7. GATE: Gate control input
8. NC: No connection

Functional Features

• Monitors power supply voltages and asserts a reset signal if they fall below the programmed threshold
• Provides manual reset capability through the MR pin
• Includes a watchdog timer to detect system malfunctions and initiate a reset if necessary
• Allows external gating of the reset output through the GATE pin

Advantages

• Wide input voltage range allows compatibility with various power supply configurations
• Adjustable reset threshold voltage provides flexibility in different applications
• Low quiescent current minimizes power consumption
• Small package size enables space-saving designs

Disadvantages

• Limited number of pins may restrict the number of features that can be implemented
• Lack of built-in protection features against voltage spikes or transients

Working Principles

The ADM1184ARMZ is designed to monitor power supply voltages in electronic systems. It compares the input voltage with a programmable threshold and asserts a reset signal if the voltage falls below the set value. The device also includes a watchdog timer that must be periodically refreshed by an external signal. If the watchdog timer is not refreshed within the programmed timeout period, a reset signal is generated.

Detailed Application Field Plans

• Embedded Systems: Ensures reliable operation of microcontrollers, DSPs, and other embedded devices by monitoring power supply voltages and initiating a reset if necessary.
• Industrial Control Systems: Provides supervision of power supply voltages in industrial control systems, preventing malfunctions due to voltage fluctuations.
• Automotive Electronics: Monitors power supply voltages in automotive applications, ensuring stable operation of critical systems such as engine control units and safety modules.

Detailed and Complete Alternative Models

1. ADM1185ARMZ: Similar to ADM1184ARMZ but with additional features like adjustable watchdog timeout period and power-on reset delay.
2. ADM1191ARMZ: Power supply supervisor with integrated overvoltage protection and adjustable reset threshold.
3. ADM1278-1ACPZ-R7: Power management IC with power supply monitoring, sequencing, and fault protection features.

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