Overview
The ADM706SARZ is a precision supply voltage supervisor IC produced by Analog Devices Inc. This component is designed to monitor power supply voltages and provide reset signals to microprocessors during power-up, power-down, and brownout conditions. It is particularly suited for applications requiring reliable power monitoring and reset functionality in 3 V or 3.3 V power supply systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 1.0 | - | 5.5 | V | - |
| Supply Current | 100 | 150 | 350 | μA | VCC < 3.6 V, VCC < 5.5 V |
| Reset Threshold (VRST) | 2.85 | 2.93 | 3.00 | V | ADM706S |
| Reset Threshold Hysteresis | 20 | - | - | mV | - |
| Reset Pulse Width | 160 | 200 | 280 | ms | VCC = 3 V to 5.5 V |
| Watchdog Timeout Period | 1.00 | 1.60 | 2.25 | sec | VCC = 3.3 V |
| WDI Pulse Width | 100 | - | - | ns | VRST (max) < VCC < 3.6 V |
| MR Input Threshold (VIL) | 0.6 | - | - | V | VRST (max) < VCC < 3.6 V |
| MR to Reset Output Delay | 750 | - | - | ns | VRST (max) < VCC < 3.6 V |
| Power Fail Input Threshold (PFI) | 1.2 | 1.25 | 1.3 | V | VCC = 3 V |
Key Features
- Precision Supply Voltage Monitoring: The ADM706SARZ monitors supply voltages with precise thresholds (2.93 V for ADM706S) and generates a reset signal during power-up, power-down, and brownout conditions.
- Low Quiescent Current: The IC operates with a quiescent current of 100 μA to 350 μA, depending on the VCC voltage.
- Independent Watchdog Timer: Features a 1.6-second watchdog timeout period to ensure system reliability.
- Debounced Manual Reset Input: The manual reset input (MR) is internally debounced and can be driven from TTL, CMOS logic, or a manual reset switch.
- Power Fail Warning: Includes a 1.25 V threshold detector for power fail warning, low battery detection, or monitoring an additional power supply.
- Reset Output: Provides an active low reset output that remains operational with VCC as low as 1 V.
Applications
- Embedded Systems: Ideal for use in microprocessor-based systems that require reliable power monitoring and reset functionality.
- Industrial Control Systems: Suitable for monitoring power supplies in industrial control systems where reliability is critical.
- Medical Devices: Used in medical devices that require precise power monitoring to ensure system integrity.
- Automotive Systems: Applicable in automotive systems where robust power monitoring is essential.
Q & A
- What is the primary function of the ADM706SARZ?
The primary function of the ADM706SARZ is to monitor the supply voltage and generate a reset signal to the microprocessor during power-up, power-down, and brownout conditions.
- What are the reset threshold voltages for the ADM706SARZ?
The reset threshold voltage for the ADM706SARZ is 2.93 V.
- What is the quiescent current of the ADM706SARZ?
The quiescent current of the ADM706SARZ is 100 μA to 350 μA, depending on the VCC voltage.
- Does the ADM706SARZ have a watchdog timer?
Yes, the ADM706SARZ features an independent watchdog timer with a 1.6-second timeout period.
- What is the purpose of the manual reset input (MR) on the ADM706SARZ?
The manual reset input (MR) is used to generate a reset signal when taken below 0.6 V and is internally debounced for reliability.
- Can the reset output of the ADM706SARZ operate at low VCC voltages?
Yes, the reset output of the ADM706SARZ remains operational with VCC as low as 1 V.
- What is the power fail input threshold for the ADM706SARZ?
The power fail input threshold for the ADM706SARZ is 1.25 V.
- What are some typical applications of the ADM706SARZ?
The ADM706SARZ is typically used in embedded systems, industrial control systems, medical devices, and automotive systems.
- How does the ADM706SARZ handle brownout conditions?
The ADM706SARZ generates a reset signal during brownout conditions to ensure system reliability.
- What is the package type of the ADM706SARZ?
The ADM706SARZ is available in an 8-lead SOIC package.
