Overview
The ADM811TARTZ-REEL7 is a voltage supervisor IC produced by Analog Devices Inc. It is part of the ADM811/ADM812 series, designed to provide reliable voltage monitoring and reset functions for microprocessors and other digital systems. This IC ensures that the microprocessor is held in a stable shutdown condition during power-down and prevents spurious activity during power-up. It features both power-on reset and manual reset capabilities, making it suitable for a wide range of applications requiring robust power management and supervision.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| RESET Threshold Voltage | 2.25 | 2.38 | - | V | TA = 25°C |
| RESET Active Timeout Period | 140 | - | 560 | ms | VCC = VTH(MAX) |
| Power-Down RESET Delay | - | - | 40 µs | - | VOD = 125 mV |
| Manual Reset Minimum Pulse Width | 10 | - | - | µs | - |
| Glitch Immunity | 100 | - | - | ns | - |
| Pull-Up Resistance | 10 | - | 30 | kΩ | - |
| RESET Output Voltage Low | 0.3 | - | - | V | VCC = VTH(MAX) |
Key Features
- Power-On Reset: Provides a reset signal to the microprocessor during power-up, ensuring both the power supply and microprocessor stabilize before operation begins.
- Manual Reset: Equipped with a debounced manual reset input, designed to operate in noisy environments and prevent unwanted glitches.
- Active Low Reset Output: The ADM811 provides an active low reset output, while the ADM812 provides an active high output.
- Power-Down Protection: The RESET output remains valid even when VCC falls as low as 1 V, ensuring the microprocessor remains in a stable shutdown condition.
- Temperature Stability: RESET threshold temperature coefficient of 30 ppm/°C, ensuring consistent operation across a wide temperature range.
Applications
- Digital Power System Management: Suitable for managing power in digital systems, including power-up and power-down sequences.
- Microprocessor Systems: Ideal for ensuring microprocessors are properly reset and stabilized during power cycles.
- Embedded Systems: Used in various embedded systems requiring reliable voltage monitoring and reset functions.
- Industrial Control Systems: Applicable in industrial environments where robust power management is crucial.
Q & A
- What is the primary function of the ADM811TARTZ-REEL7? The primary function is to provide reliable voltage monitoring and reset signals for microprocessors and digital systems.
- What types of reset outputs does the ADM811/ADM812 series offer? The ADM811 provides an active low reset output, while the ADM812 provides an active high reset output.
- How does the manual reset input work? The manual reset input is debounced to prevent unwanted glitches and can be activated by an electrical switch or another digital device.
- What is the minimum pulse width for the manual reset input? The minimum pulse width for the manual reset input is 10 µs.
- How does the IC handle power-down scenarios? During power-down, the RESET output remains valid even when VCC falls as low as 1 V, ensuring the microprocessor remains in a stable shutdown condition.
- What is the temperature coefficient of the RESET threshold voltage? The RESET threshold temperature coefficient is 30 ppm/°C.
- What is the typical power-down reset delay? The typical power-down reset delay is 40 µs for VOD = 125 mV.
- Can the ADM811TARTZ-REEL7 be used in noisy environments? Yes, it is designed to operate in noisy environments and includes glitch immunity features.
- What is the pull-up resistance range for the RESET output? The pull-up resistance range is between 10 kΩ and 30 kΩ.
- What are some common applications for the ADM811TARTZ-REEL7? Common applications include digital power system management, microprocessor systems, embedded systems, and industrial control systems.
