Overview
The ADM708SARZ-REEL, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to monitor and protect microprocessor systems from power failures and other anomalies. This component is part of the ADM708 series and is specifically configured to provide a precise voltage monitoring function, ensuring reliable operation of the system.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 1.0 | 5.5 | V | ||
| Supply Current | 100 | 200 | 350 | μA | VCC < 3.6 V, VCC < 5.5 V |
| Reset Threshold (VRST) | 2.85 | 2.93 | 3.00 | V | ADM708S |
| Reset Threshold Hysteresis | 20 | mV | |||
| Reset Pulse Width | 160 | 200 | 280 | ms | |
| Manual Reset Input (MR) Threshold | 0.6 | 0.8 | V | Logic Low, Logic High | |
| Power Fail Input (PFI) Threshold | 1.2 | 1.25 | 1.3 | V | |
| Operating Temperature Range | -40 | 85 | °C | ||
| Package | 8-Lead SOIC (R-8) |
Key Features
- Precision Supply Voltage Monitoring: The ADM708SARZ monitors supply voltages with precise thresholds (e.g., 2.93 V for ADM708S).
- Low Quiescent Current: The device operates with a quiescent current of 100 μA to 350 μA, depending on the supply voltage.
- 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.
- Independent Watchdog Timer (Not Available in ADM708 Series): Although the watchdog timer is not available in the ADM708 series, it is a feature in some related models like the ADM706 series.
- Active High and Active Low Reset Outputs: The ADM708SARZ provides both active high and active low reset outputs, making it versatile for different system requirements.
- Power Fail Input (PFI): The device includes a power fail input for monitoring additional supply voltages or battery levels.
Applications
- Microprocessor Systems: The ADM708SARZ is designed to monitor and protect microprocessor systems from power failures and anomalies, ensuring reliable operation.
- Embedded Systems: It is suitable for use in embedded systems where precise voltage monitoring and reset functions are critical.
- Battery-Powered Devices: The component can be used in battery-powered devices to monitor battery levels and prevent system malfunctions due to low voltage.
- Industrial and Automotive Systems: Given its wide operating temperature range (-40°C to +85°C), it is also applicable in industrial and automotive environments.
Q & A
- What is the primary function of the ADM708SARZ?
The primary function of the ADM708SARZ is to monitor the supply voltage and provide reset signals to the microprocessor in case of power failures or anomalies.
- What are the reset threshold voltages for the ADM708SARZ?
The reset threshold voltage for the ADM708SARZ is between 2.85 V and 3.00 V, with a typical value of 2.93 V.
- What is the quiescent current of the ADM708SARZ?
The quiescent current of the ADM708SARZ ranges from 100 μA to 350 μA, depending on the supply voltage.
- Does the ADM708SARZ have a watchdog timer function?
No, the ADM708 series does not include a watchdog timer function, unlike some other related models.
- What types of reset outputs does the ADM708SARZ provide?
The ADM708SARZ provides both active high and active low reset outputs.
- What is the operating temperature range of the ADM708SARZ?
The operating temperature range of the ADM708SARZ is -40°C to +85°C.
- In what package is the ADM708SARZ available?
The ADM708SARZ is available in an 8-Lead SOIC (R-8) package.
- Can the ADM708SARZ be used in battery-powered devices?
- Is the manual reset input (MR) internally debounced?
- What is the purpose of the power fail input (PFI) in the ADM708SARZ?
The power fail input (PFI) is used to monitor additional supply voltages or battery levels.
