Overview
The ADM6315-31D3ARTZR7 is a supervisory circuit designed by Analog Devices Inc. to ensure the reliable operation of microprocessor-based systems during power-up, power-down, and brownout conditions. This IC is part of the ADM6315 series, which is known for its accurate reset threshold and robust transient immunity. The ADM6315 monitors supply voltages with high precision, detecting degradations as small as 1.8% of the supply voltage, and can handle voltages from 2.5 V to 5 V in 100 mV increments.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Voltage Monitoring Range | 2.5 V to 5 V (100 mV increments) | |
| RESET Active Timeout Period | 140 ms to 200 ms (typical 200 ms) | TA = −40°C to +85°C |
| RESET Active Timeout Period | 112 ms to 336 ms (typical 200 ms) | TA = −40°C to +125°C |
| Manual Reset Input Threshold (VIL) | 0.3 × VCC (VTH < 4 V), 0.8 V (VTH > 4 V) | |
| Manual Reset Input Threshold (VIH) | 0.7 × VCC (VTH < 4 V), 2.4 V (VTH > 4 V) | |
| Minimum Input Pulse for Manual Reset | 1 μs | |
| Glitch Rejection | 100 ns | |
| Pull-Up Resistance | 32 kΩ to 100 kΩ | |
| RESET Output Voltage | 0.4 V (typical) |
Key Features
- Accurate Reset Threshold: The ADM6315 series features an accurate internal voltage reference circuit, ensuring reliable operation even during significant supply voltage degradations.
- Transient Immunity: The IC has good immunity from negative-going transients, making it suitable for use in noisy environments.
- Manual Reset Input: The ADM6315 includes a debounced manual reset input (MR) that can be used for manual or digital circuit-initiated resets.
- RESET Open-Drain Output: The RESET output is an open-drain configuration, allowing it to sink current from sources with a voltage greater than the VCC of the ADM6315 input.
- Power-Up and Power-Down Protection: The IC ensures proper system operation during power-up and power-down by maintaining the RESET output low for a specified period, allowing the system to stabilize before devices are brought out of reset.
Applications
- Microprocessor-Based Systems: The ADM6315 is designed to protect the integrity of microprocessor-based systems by ensuring proper operation during power-up, power-down, and brownout conditions.
- Noisy Environments: Due to its transient immunity, the ADM6315 is suitable for use in environments prone to electrical noise and transients.
- Embedded Systems: It is ideal for embedded systems that require reliable power monitoring and reset functions to prevent system malfunctions.
Q & A
- What is the voltage monitoring range of the ADM6315?
The ADM6315 can monitor voltages from 2.5 V to 5 V in 100 mV increments.
- What is the typical RESET active timeout period for the ADM6315-31D3ARTZR7?
The typical RESET active timeout period is 200 ms at temperatures between −40°C to +85°C.
- How does the manual reset input work on the ADM6315?
The manual reset input (MR) can be used for manual or digital circuit-initiated resets and ignores negative-going pulses faster than 100 ns, while accepting pulses greater than or equal to 1 μs.
- What is the significance of the open-drain RESET output?
The open-drain RESET output allows it to sink current from sources with a voltage greater than the VCC of the ADM6315 input, making it versatile for various applications.
- How does the ADM6315 handle power-up and power-down conditions?
The ADM6315 maintains the RESET output low for a specified period during power-up and power-down, ensuring the system stabilizes before devices are brought out of reset.
- What kind of environments is the ADM6315 suitable for?
The ADM6315 is suitable for use in noisy environments due to its good transient immunity.
- What is the purpose of the glitch rejection feature in the ADM6315?
The glitch rejection feature ensures that the IC ignores negative-going pulses that are faster than 100 ns, enhancing its reliability in noisy environments.
- How does the ADM6315 protect against brownout conditions?
The ADM6315 produces a reset in 35 μs typical when a brownout condition occurs, ensuring the system resets before any part of the system’s voltage falls below its recommended operating voltage.
- What is the pull-up resistance range for the manual reset input?
The pull-up resistance range for the manual reset input is between 32 kΩ and 100 kΩ.
- What is the typical output voltage of the RESET output?
The typical output voltage of the RESET output is 0.4 V.
