Overview
The ADM709MAR, produced by Analog Devices Inc., is a power supply monitor integrated circuit designed to generate a system reset during power-up, power-down, and brownout conditions. This device is crucial for ensuring the stability and reliability of microprocessor systems by monitoring the supply voltage and initiating a reset when the voltage falls below a specified threshold. The ADM709MAR is available in an 8-pin SOIC package and operates over a wide temperature range of -40°C to +85°C.
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 |
| VCC Operating Voltage Range | 1.2 | - | 5.5 | V | TA = –40°C to +85°C |
| Supply Current | 35 | 85 | 110 | µA | VCC < 3.6 V, TA = –40°C to +85°C |
| Reset Threshold | 4.25 | 4.40 | 4.50 | V | ADM709MAR |
| 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 = Reset Threshold min |
| Operating Temperature | -40 | - | 85 | °C | - |
| Package | - | - | - | 8-SOIC | - |
Key Features
- Precision Supply Voltage Monitor: Monitors supply voltages for +5 V, +3.3 V, and +3 V systems.
- Low Quiescent Current: Consumes only 35 µA of supply current, making it power-efficient.
- Power-On Reset Pulse: Generates a reset pulse of at least 140 ms after VCC rises above the threshold.
- Low Cost: Economical solution for power supply monitoring.
- Compact Packaging: Available in 8-pin DIP and SOIC packages.
- Wide Operating Temperature Range: Operates from -40°C to +85°C.
- Active Low Reset Output: The RESET output remains low while VCC is below the reset threshold voltage and for a specified time after VCC rises above the threshold).
Applications
- Microprocessor Systems: Ensures reliable operation of microprocessors by monitoring the power supply and generating a reset if necessary).
- Computers and Controllers: Used in various computer and control systems to monitor power supply conditions).
- Intelligent Instruments: Suitable for use in intelligent instruments that require precise power supply monitoring).
- Critical Microprocessor Monitoring: Essential in applications where microprocessor stability is critical, such as in automotive systems and other critical monitoring applications).
Q & A
- What is the primary function of the ADM709MAR?
The primary function of the ADM709MAR 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 quiescent current of the ADM709MAR?
The quiescent current of the ADM709MAR is 35 µA when VCC is below 3.6 V).
- What is the duration of the power-on reset pulse generated by the ADM709MAR?
The power-on reset pulse generated by the ADM709MAR is at least 140 ms after VCC rises above the threshold).
- What is the operating temperature range of the ADM709MAR?
The ADM709MAR operates over a temperature range of -40°C to +85°C).
- What type of package is the ADM709MAR available in?
The ADM709MAR is available in an 8-pin SOIC package).
- Is the ADM709MAR RoHS compliant?
No, the ADM709MAR is not RoHS compliant).
- What is the VCC to RESET delay of the ADM709MAR?
The VCC to RESET delay of the ADM709MAR is 20 µs).
- What are some common applications of the ADM709MAR?
The ADM709MAR is commonly used in microprocessor systems, computers, controllers, intelligent instruments, and critical microprocessor monitoring applications).
- How does the RESET output of the ADM709MAR behave?
The RESET output of the ADM709MAR remains low while VCC is below the reset threshold voltage and for a specified time after VCC rises above the threshold).
