Overview
The ADM709TARZ-REEL, produced by Analog Devices Inc., is a precision power supply monitor with reset functionality. This device is designed to monitor power supply voltages and generate a system reset during power-up, power-down, and brownout conditions. It is particularly useful in ensuring that microprocessors and other critical systems remain in a stable state during power transitions.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 1.0 | 5.5 | V | ||
| Quiescent Current | 35 | µA | |||
| Reset Threshold (ADM709T) | 3.00 | 3.08 | 3.15 | V | |
| Power-On Reset Pulse Width | 140 | 380 | ms | ||
| RESET Output Voltage (ISINK = 1.2 mA) | 0.3 | V | VCC ≥ 1.0 V | ||
| Package | 8-Pin DIP and SOIC |
Key Features
- Precision supply voltage monitor for +5 V, +3.3 V, and +3 V power supplies.
- Low quiescent current of 35 µA.
- 140 ms minimum power-on reset pulse width to ensure system stability after power-up.
- RESET output remains operational with VCC as low as 1 V.
- Available in 8-pin DIP and SOIC packages.
- Low cost and suitable for upgrading from MAX709.
Applications
- Microprocessor systems.
- Computers and controllers.
- Intelligent instruments.
- Critical microprocessor monitoring.
- Automotive systems requiring critical microprocessor power monitoring.
Q & A
- What is the primary function of the ADM709TARZ-REEL?
The primary function is to monitor power supply voltages and generate a system reset during power-up, power-down, and brownout conditions.
- What are the available reset threshold levels for the ADM709?
The reset threshold levels are 4.65 V, 4.40 V, 3.08 V, 2.93 V, and 2.63 V, corresponding to different suffixes (L, M, T, S, R respectively).
- What is the quiescent current of the ADM709TARZ-REEL?
The quiescent current is 35 µA.
- How long does the RESET output remain low after power-up?
The RESET output remains low for a minimum of 140 ms after VCC rises above the threshold.
- What are the package options for the ADM709TARZ-REEL?
The device is available in 8-pin DIP and SOIC packages.
- What is the minimum VCC at which the RESET output remains operational?
The RESET output remains operational with VCC as low as 1 V.
- Can the ADM709TARZ-REEL be used in automotive systems?
- How does the device handle power supply brownouts?
A power supply brownout will initiate a processor reset to ensure system stability.
- What is the purpose of the 140 ms power-on reset pulse width?
The 140 ms power-on reset pulse width allows time for the power supply and microprocessor to stabilize after power-up.
- Can additional glitch immunity be achieved with the ADM709TARZ-REEL?
