Overview
The ADM809TARTZ-REEL is a supervisory circuit produced by Analog Devices Inc., designed to monitor the power supply voltage in microprocessor systems. This component is part of the ADM803/ADM809/ADM810 series, which ensures reliable operation by providing accurate reset thresholds and glitch immunity. The ADM809 specifically offers an active low reset signal (RESET) with a push-pull output, making it suitable for a variety of microprocessor applications.
Key Specifications
| Parameter | Value |
|---|---|
| Reset Threshold Voltage | 2.55 V to 2.70 V (TA = 25°C), 2.52 V to 2.74 V (TA = −40°C to +85°C), 2.22 V to 2.42 V (TA = −40°C to +125°C) |
| VCC to Reset Delay | 20 μs |
| Reset Active Timeout Period | 140 ms to 240 ms (TA = −40°C to +85°C), 100 ms to 840 ms (TA = 85°C to 125°C) |
| Reset Output Voltage Low | 0.3 V (VCC = VTH min, ISINK = 1.2 mA), 0.4 V (VCC = VTH min, ISINK = 3.2 mA) |
| Reset Output Voltage High | 0.8 VCC (VCC > VTH max, ISOURCE = 500 μA) |
| Package Type | SOT-23-3 |
| Operating Temperature Range | −40°C to +125°C |
| VCC Range | −0.3 V to +6 V |
Key Features
- Accurate internal voltage reference circuit with built-in glitch immunity to ensure reliable operation during power failures and transients.
- Push-pull output for the reset signal, providing both active low and active high options depending on the model.
- Internal timer that holds the reset asserted for 240 ms on power-up to ensure stable conditions before releasing the microprocessor from reset.
- Seven reset threshold voltage options available to monitor a variety of supply voltages.
- Low power consumption and high reliability, making it suitable for critical microprocessor applications.
Applications
The ADM809TARTZ-REEL is widely used in microprocessor systems that require reliable power supply monitoring. This includes:
- Embedded systems where stable power supply is crucial.
- Industrial control systems that need robust voltage monitoring.
- Aerospace and automotive applications where high reliability is essential.
- Any system requiring accurate reset thresholds and glitch immunity to prevent malfunctions during power failures or transients.
Q & A
- What is the primary function of the ADM809TARTZ-REEL?
The primary function is to monitor the power supply voltage in microprocessor systems and provide a reset signal when the voltage falls below a specified threshold. - What types of reset signals does the ADM809 provide?
The ADM809 provides an active low reset signal with a push-pull output. - What is the reset active timeout period for the ADM809?
The reset active timeout period ranges from 140 ms to 240 ms at temperatures between −40°C and +85°C, and from 100 ms to 840 ms at temperatures between 85°C and 125°C. - What is the significance of the internal timer in the ADM809?
The internal timer holds the reset asserted for 240 ms on power-up to ensure stable conditions before releasing the microprocessor from reset. - How many reset threshold voltage options are available for the ADM809?
Seven reset threshold voltage options are available to monitor a variety of supply voltages. - What is the operating temperature range for the ADM809?
The operating temperature range is −40°C to +125°C. - What is the package type of the ADM809TARTZ-REEL?
The package type is SOT-23-3. - What is the VCC range for the ADM809?
The VCC range is −0.3 V to +6 V. - Does the ADM809 have built-in glitch immunity?
Yes, the ADM809 has built-in glitch immunity to ensure reliable operation during fast transients on VCC. - What are some common applications of the ADM809TARTZ-REEL?
Common applications include embedded systems, industrial control systems, aerospace, and automotive applications where high reliability is essential.
