Overview
The ADM709MARZ, 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 component is particularly useful in ensuring the stable operation of microprocessors and other critical systems by monitoring the supply voltage and initiating a reset when the voltage falls below a specified threshold.
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 | 85 | 110 | µA | VCC < 3.6 V, TA = 0°C to +70°C |
| Reset Threshold | 4.25 | 4.40 | 4.50 | V | ADM709M |
| 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 |
| Operating Temperature | -40 | - | +85 | °C | - |
| Package | - | - | - | - | 8-SOIC (0.154", 3.90mm Width) |
Key Features
- Precision Supply Voltage Monitor: Available for +5 V, +3.3 V, and +3 V supply monitoring.
- Low Quiescent Current: Typically 35 µA.
- Power-On Reset Pulse: RESET output is held low for 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.
- Active Low Reset Output: RESET output remains operational with VCC as low as 1 V.
Applications
- Microprocessor Systems: Ensures stable operation of microprocessors during power-up, power-down, and brownout conditions.
- Computers and Controllers: Used in various computing and control systems to monitor power supply integrity.
- Intelligent Instruments: Suitable for use in intelligent instruments that require reliable power supply monitoring.
- Critical Power Monitoring: Ideal for applications where power supply stability is critical, such as in automotive systems.
Q & A
- What is the primary function of the ADM709MARZ?
The primary function of the ADM709MARZ is to monitor the power supply voltage and generate a system reset during power-up, power-down, and brownout conditions.
- What are the available voltage threshold levels for the ADM709MARZ?
The ADM709MARZ is available with voltage threshold levels suitable for +5 V, +3.3 V, and +3 V supply monitoring.
- What is the typical quiescent current of the ADM709MARZ?
The typical quiescent current of the ADM709MARZ is 35 µA.
- How long is the RESET output held low after VCC rises above the threshold?
The RESET output is held low for a minimum of 140 ms after VCC rises above the threshold.
- What is the operating temperature range of the ADM709MARZ?
The operating temperature range of the ADM709MARZ is -40°C to +85°C.
- In what package types is the ADM709MARZ available?
The ADM709MARZ is available in 8-pin DIP and SOIC packages.
- Is the RESET output active high or active low?
The RESET output is active low.
- What is the minimum VCC voltage at which the RESET output remains operational?
The RESET output remains operational with VCC as low as 1 V.
- What are some common applications of the ADM709MARZ?
The ADM709MARZ is commonly used in microprocessor systems, computers, controllers, intelligent instruments, and critical power monitoring applications.
- How does the ADM709MARZ handle brownout conditions?
The ADM709MARZ generates a system reset during brownout conditions when the supply voltage falls below the specified threshold.
