Overview
The ADM705ANZ, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to monitor 5 V power supplies and microprocessor activity. This component is part of the ADM705/ADM706/ADM707/ADM708 family and is particularly suited for applications requiring robust power supply monitoring and reset functionality. It features a combination of power-supply monitoring, watchdog timer, and manual reset capabilities, making it an essential component in various electronic systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 1.0 | 5.5 | V | ||
| Supply Current | 190 | 250 | μA | ||
| Reset Threshold | 4.5 | 4.65 | 4.75 | V | ADM705/ADM707 |
| Reset Threshold Hysteresis | 40 mV | ||||
| Reset Pulse Width | 160 | 200 | 280 | ms | |
| RESET Output Voltage | VCC − 1.5 V | ISOURCE = 800 μA | |||
| Watchdog Timeout Period (tWD) | 1.00 | 1.60 | 2.25 | sec | |
| WDI Input Threshold | 0.8 V | 3.5 V | Logic Low/High | ||
| MR Pull-Up Current | 100 | 250 | 600 | μA | MR = 0 V |
| PFI Input Threshold | 1.2 | 1.25 | 1.3 | V |
Key Features
- Power-supply monitoring circuitry that generates a reset output during power-up, power-down, and brownout conditions.
- Independent watchdog timer with a 1.60 sec timeout (for ADM705 and ADM706 models).
- Debounced TTL/CMOS manual reset input (MR).
- Voltage monitor for power fail or low battery warning with a 1.25 V threshold detector.
- Active low reset output (RESET) and active high reset output (for ADM707 and ADM708 models).
- Available in 8-lead PDIP and 8-lead SOIC packages.
- Operating temperature range: −40°C to +85°C.
Applications
- Microprocessor systems.
- Computers.
- Controllers.
- Intelligent instruments.
- Critical microprocessor power monitoring.
- Automotive systems.
Q & A
- What is the primary function of the ADM705ANZ? The primary function of the ADM705ANZ is to monitor 5 V power supplies and microprocessor activity, generating reset outputs during power-up, power-down, and brownout conditions.
- What is the reset threshold voltage for the ADM705ANZ? The reset threshold voltage for the ADM705ANZ is 4.65 V.
- What is the watchdog timeout period for the ADM705 model? The watchdog timeout period for the ADM705 model is 1.60 seconds.
- What types of packages are available for the ADM705ANZ? The ADM705ANZ is available in 8-lead PDIP and 8-lead SOIC packages.
- What is the operating temperature range for the ADM705ANZ? The operating temperature range for the ADM705ANZ is −40°C to +85°C.
- Does the ADM705ANZ have a manual reset input? Yes, the ADM705ANZ has a debounced TTL/CMOS manual reset input (MR).
- What is the purpose of the power-fail input (PFI) on the ADM705ANZ? The power-fail input (PFI) is used to monitor power fail or low battery conditions, triggering the power-fail output (PFO) when the input voltage falls below 1.25 V.
- Is the ADM705ANZ RoHS compliant? Yes, the ADM705ANZ is lead-free and RoHS compliant.
- What is the supply current of the ADM705ANZ? The supply current of the ADM705ANZ is typically 250 μA.
- Can the ADM705ANZ be used in automotive systems? Yes, the ADM705ANZ can be used in automotive systems for critical microprocessor power monitoring.
