Overview
The ADM809TART-REEL is a supervisory circuit produced by Analog Devices Inc., designed to monitor the power supply voltage in microprocessor systems. This component ensures that the microprocessor operates within stable voltage conditions, preventing malfunctions during power-up, brownout, or power failure scenarios. The ADM809 provides an active low reset signal and features a push-pull output, making it versatile for various system designs.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Reset Threshold Voltage | 3.08 V | Ta = 25°C |
| Reset Threshold Voltage Range | 2.93 V to 3.08 V | Ta = -40°C to +85°C |
| Reset Active Timeout Period | 140 ms to 240 ms | Ta = -40°C to +85°C |
| VCC to Reset Delay | 20 μs | VCC = VTH to (VTH - 100 mV) |
| Reset Output Voltage Low | 0.3 V | VCC = VTH min, ISINK = 1.2 mA |
| Reset Output Voltage High | 0.8 VCC V | VCC > VTH max, ISOURCE = 500 μA |
| Absolute Maximum Ratings - VCC | -0.3 V to +6 V | Ta = 25°C |
| Operating Temperature Range | -40°C to +105°C | |
| Package Type | SOT-23-3 |
Key Features
- Accurate Reset Threshold: The ADM809 features a very accurate internal voltage reference circuit, reducing the possibility of malfunctions during power failures.
- Glitch Immunity: The reset comparator has built-in glitch immunity, making it immune to fast transients on VCC.
- Push-Pull Output: The ADM809 has a push-pull output, which is more robust compared to open-drain outputs and does not require an external pull-up resistor.
- Low Voltage Operation: The reset output remains operational with VCC as low as 1 V.
- Multiple Reset Threshold Options: Available in various reset threshold voltages, making it suitable for monitoring a variety of supply voltages.
- RoHS Compliant: The component is lead-free and RoHS compliant, ensuring environmental sustainability.
Applications
The ADM809TART-REEL is widely used in microprocessor systems to ensure stable operation during power-up, brownout, and power failure conditions. It is particularly useful in:
- Embedded systems requiring reliable power monitoring.
- Industrial control systems where stable operation is critical.
- Automotive electronics that need robust power supervision.
- Medical devices requiring precise voltage monitoring.
- Consumer electronics that demand reliable power management.
Q & A
- What is the primary function of the ADM809TART-REEL?
The primary function is to monitor the power supply voltage in microprocessor systems and provide a reset signal during power-up, brownout, or power failure conditions.
- What type of reset signal does the ADM809TART-REEL provide?
The ADM809TART-REEL provides an active low reset signal.
- What is the reset threshold voltage for the ADM809TART-REEL?
The reset threshold voltage is 3.08 V at 25°C.
- What is the operating temperature range of the ADM809TART-REEL?
The operating temperature range is -40°C to +105°C.
- Does the ADM809TART-REEL require an external pull-up resistor?
No, it does not require an external pull-up resistor because it has a push-pull output.
- Is the ADM809TART-REEL RoHS compliant?
- What is the package type of the ADM809TART-REEL?
The package type is SOT-23-3.
- How long does the reset output remain asserted during power-up?
The reset output remains asserted for 240 ms during power-up.
- What is the VCC to reset delay time?
The VCC to reset delay time is 20 μs.
- Is the ADM809TART-REEL immune to voltage glitches?
