Overview
The ADM812RARTZ-REEL7, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed for reliable voltage monitoring in various applications. This device is part of the ADM811/ADM812 series, which are suitable for monitoring multiple standard PSU voltages such as 2.5 V, 3 V, 3.3 V, and 5 V. The ADM812RARTZ-REEL7 provides an active high reset output, making it ideal for ensuring the stability and proper operation of microprocessors during power-up, power-down, and in the event of voltage brownouts or interruptions.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Number of Channels | 1 | - | - | - | - |
| Max Supply Voltage | - | - | 5.5 | V | - |
| Min Supply Voltage | 1 | - | - | V | - |
| RESET Output Voltage Low | 0.3 | - | - | V | VCC = VTH(MAX) |
| Manual Reset Input | - | - | - | - | Active low, debounced input |
| Reset Timeout | - | 240 | - | ms | After VCC rises above the reset threshold |
| Package Type | - | - | - | - | 4-Lead SOT-143 |
Key Features
- Active High Reset Output: The ADM812RARTZ-REEL7 provides an active high reset output, ensuring the microprocessor remains in a stable state during power-up and power-down cycles.
- Manual Reset Input: Equipped with a debounced manual reset input that ignores input pulses of 100 ns or less and is guaranteed to accept input pulses of greater than 10 μs.
- Voltage Monitoring: Monitors six different voltages with 5% or 10% degradation of standard PSU voltages before a reset occurs.
- Low Power Consumption: Low supply current, making it suitable for power-sensitive applications.
- Stability During Power Transitions: The reset output remains active for 240 ms after the supply recovers from a brownout or interruption, ensuring the microprocessor and power supply stabilize.
Applications
- Microprocessor Systems: Ideal for ensuring the stability and proper operation of microprocessors during various power conditions.
- Controllers and Intelligent Instruments: Suitable for use in control systems and intelligent instruments that require reliable voltage monitoring.
- Automotive Systems: Used in automotive applications where robust voltage monitoring is crucial.
- Safety Systems: Employed in safety-critical systems to ensure reliable operation under various voltage conditions.
- Portable Instruments: Applicable in portable instruments where power stability is essential.
Q & A
- What is the primary function of the ADM812RARTZ-REEL7?
The primary function is to monitor supply voltages and provide a reset signal to ensure the stability of microprocessors. - What types of voltages can the ADM812RARTZ-REEL7 monitor?
The device can monitor 2.5 V, 3 V, 3.3 V, and 5 V supply voltage levels. - What is the nature of the reset output of the ADM812RARTZ-REEL7?
The reset output is active high. - How does the manual reset input work?
The manual reset input is active low and debounced, ignoring input pulses of 100 ns or less and accepting pulses greater than 10 μs. - What is the recommended decoupling for the VCC pin?
A 0.1 μF decoupling capacitor between VCC and the GND pin is recommended. - How long does the reset output remain active after the supply recovers from a brownout?
The reset output remains active for 240 ms after the supply recovers. - What is the package type of the ADM812RARTZ-REEL7?
The package type is 4-Lead SOT-143. - What are some common applications of the ADM812RARTZ-REEL7?
Common applications include microprocessor systems, controllers, intelligent instruments, automotive systems, safety systems, and portable instruments. - What is the maximum supply voltage for the ADM812RARTZ-REEL7?
The maximum supply voltage is 5.5 V. - What is the minimum supply voltage for the ADM812RARTZ-REEL7?
The minimum supply voltage is 1 V.
