Overview
The ADM811LARTZ-REEL7 is a reliable voltage monitoring device produced by Analog Devices Inc. It is part of the ADM811/ADM812 series, designed for use in various voltage monitoring applications. These devices are particularly suited for monitoring supply voltages in systems that require robust power management, such as microprocessor systems, controllers, intelligent instruments, automotive systems, safety systems, and portable instruments. The ADM811 provides an active low reset output, while the ADM812 provides an active high reset output, ensuring that the system remains in a stable state during power-up and power-down cycles.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage Monitored | 2.5 V, 3 V, 3.3 V, 5 V |
| Reset Threshold Tolerance | 5% or 10% degradation of standard PSU voltages |
| Reset Output | Active Low (ADM811), Active High (ADM812) |
| Manual Reset Input | Active Low, Debounced, Minimum Pulse Width: 10 μs |
| Reset Active Timeout Period | 140 ms to 560 ms (VCC = VTH(MAX)) |
| Reset Propagation Delay | 0.5 μs |
| Power-Down Reset Delay | 20 μs to 40 μs (VOD = 125 mV) |
| Supply Current | Typically 12 μA at VCC = 5.5 V |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | SOT-143 |
Key Features
- Debounced manual reset input to ignore unwanted glitches.
- Logic low reset output for ADM811 and logic high reset output for ADM812.
- Automatic power-on reset with a delay to allow the power supply and microprocessor to stabilize.
- Reset output remains valid during power-down, ensuring the microprocessor is held in a stable shutdown condition.
- Low supply current, typically 12 μA at VCC = 5.5 V.
- Operating temperature range from -40°C to +85°C.
Applications
- Microprocessor systems.
- Controllers.
- Intelligent instruments.
- Automotive systems.
- Safety systems.
- Portable instruments.
Q & A
- What is the primary function of the ADM811LARTZ-REEL7? The primary function is to monitor supply voltages and provide a reset signal to ensure system stability during power-up and power-down cycles.
- What are the monitored supply voltages for the ADM811/ADM812? The devices monitor 2.5 V, 3 V, 3.3 V, and 5 V supply voltage levels.
- What is the reset output type for the ADM811 and ADM812? 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, ignoring input pulses of 100 ns or less and accepting pulses greater than 10 μs.
- What is the typical reset active timeout period? The reset active timeout period is typically between 140 ms to 560 ms (VCC = VTH(MAX)).
- What is the power-down reset delay? The power-down reset delay is typically between 20 μs to 40 μs (VOD = 125 mV).
- What is the operating temperature range of the ADM811LARTZ-REEL7? The operating temperature range is from -40°C to +85°C.
- What package type is the ADM811LARTZ-REEL7 available in? The device is available in the SOT-143 package type.
- How does the device handle power-down scenarios? During power-down, the reset output remains valid, ensuring the microprocessor is held in a stable shutdown condition.
- What are some common applications of the ADM811/ADM812? Common applications include microprocessor systems, controllers, intelligent instruments, automotive systems, safety systems, and portable instruments.
