Overview
The ADM709SAR is a power supply monitor IC designed by Analog Devices Inc. This component is part of the ADM709 series, which provides reliable system voltage monitoring and power-on reset functions. It is particularly useful in ensuring that microprocessor systems operate within safe voltage ranges, preventing malfunctions due to power-up, power-down, or brownout conditions. The ADM709SAR is available in an 8-pin SOIC package and supports a wide operating temperature range, making it versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Units | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 1.0 | - | 5.5 | V | TA = 0°C to +70°C |
| Supply Current | 35 | - | 110 | µA | VCC < 3.6 V, TA = –40°C to +85°C |
| Reset Threshold | 2.85 | 2.93 | 3.00 | V | ADM709SAR |
| VCC to RESET Delay | - | - | 20 | µs | VCC = Reset Threshold max–min |
| RESET Active Time-Out Period | 140 | 280 | 380 | ms | VCC = Reset Threshold max, VCC Rising |
| RESET Output Voltage | 0.3 | - | - | V | ISINK = 1.2 mA, VCC ≥ 1.0 V |
| Operating Temperature Range | -40 | - | 85 | °C | - |
| Package | - | - | - | 8-SOIC | - |
Key Features
- Precision Supply Voltage Monitor: The ADM709SAR monitors single voltage levels, ensuring reliable system operations for +5 V, +3.3 V, and +3 V power supplies.
- Power-On Reset Generator: Generates a system reset during power-up, power-down, and brownout conditions, ensuring proper system initialization.
- Low Power Consumption: Quiescent current as low as 35 µA, making it energy-efficient.
- Fast Response Time: Quick response to out-of-tolerance voltage conditions.
- Push-Pull, Totem Pole Output: Capable of driving loads with active low reset output.
- Compact Package: Available in an 8-pin SOIC package, suitable for space-constrained applications.
Applications
- Microprocessor Systems: Ensures reliable operation of microprocessors by monitoring power supply voltages.
- Computer Systems: Used in various computer systems to prevent malfunctions due to voltage fluctuations.
- Consumer Electronics: Suitable for consumer electronics requiring precise voltage monitoring.
- Industrial Control Systems: Ideal for industrial control systems that need robust power monitoring.
- Telecommunication Equipment: Used in telecommunication equipment to ensure reliable operation under various voltage conditions.
- Automotive Systems: Applied in automotive systems for critical power monitoring and reset functions.
Q & A
- What is the primary function of the ADM709SAR?
The primary function of the ADM709SAR is to monitor the power supply voltage and generate a system reset during power-up, power-down, and brownout conditions. - What are the available reset threshold voltages for the ADM709 series?
The ADM709 series offers several reset threshold voltages, including 4.65 V, 4.40 V, 3.08 V, 2.93 V, and 2.63 V. - What is the typical quiescent current of the ADM709SAR?
The typical quiescent current of the ADM709SAR is 35 µA. - What is the minimum power-on reset pulse duration?
The minimum power-on reset pulse duration is 140 ms. - What is the operating temperature range of the ADM709SAR?
The operating temperature range of the ADM709SAR is -40°C to +85°C. - In what package is the ADM709SAR available?
The ADM709SAR is available in an 8-pin SOIC package. - What type of output does the ADM709SAR have?
The ADM709SAR has a push-pull, totem pole output. - Is the ADM709SAR RoHS compliant?
No, the ADM709SAR contains lead and is not RoHS compliant. - What are some common applications of the ADM709SAR?
Common applications include microprocessor systems, computer systems, consumer electronics, industrial control systems, telecommunication equipment, and automotive systems. - What is the significance of the VCC to RESET delay?
The VCC to RESET delay ensures that the reset signal is generated after the power supply voltage has stabilized, typically within 20 µs.
