Overview
The ADM705ARZ from Analog Devices Inc. is a microprocessor supervisory circuit designed to monitor power supply conditions and ensure reliable operation of microprocessor systems. This IC provides essential functions such as power-up, power-down, and brownout detection, along with a manual reset input and an independent watchdog timer. It is particularly useful in applications requiring robust power supply monitoring and reset generation.
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 | |
| Watchdog Timeout Period | 1.00 | 1.60 | 2.25 | sec | ADM705/ADM706 |
| Operating Temperature Range | −40°C | +85°C | |||
| Package | SOIC-8 |
Key Features
- Power-supply monitoring circuitry that generates a reset output during power-up, power-down, and brownout conditions.
- Debounced TTL/CMOS manual reset input (MR).
- Independent watchdog timer with a 1.60 sec timeout.
- Voltage monitor for power fail or low battery warning with a 1.25 V threshold detector.
- Reset output remains operational with VCC as low as 1 V.
- Quiescent current of 190 μA and operating voltage range from 1.0 V to 5.5 V.
- Precision supply voltage monitor set at 4.65 V.
Applications
- Microprocessor systems
- Computers
- Controllers
- Intelligent instruments
- Critical microprocessor supply monitoring
- Automotive systems
Q & A
- What is the primary function of the ADM705ARZ?
The primary function of the ADM705ARZ is to monitor power supply conditions and generate a reset output during power-up, power-down, and brownout conditions to ensure reliable operation of microprocessor systems.
- What is the operating voltage range of the ADM705ARZ?
The operating voltage range of the ADM705ARZ is from 1.0 V to 5.5 V.
- What is the reset pulse width of the ADM705ARZ?
The reset pulse width of the ADM705ARZ is typically 200 ms, with a range of 160 ms to 280 ms.
- Does the ADM705ARZ have a watchdog timer?
- What is the package type of the ADM705ARZ?
The ADM705ARZ is available in an 8-lead SOIC (Small Outline Integrated Circuit) package.
- What is the operating temperature range of the ADM705ARZ?
The operating temperature range of the ADM705ARZ is from −40°C to +85°C.
- Can the reset output of the ADM705ARZ operate at low VCC levels?
- What is the quiescent current of the ADM705ARZ?
The quiescent current of the ADM705ARZ is 190 μA.
- Does the ADM705ARZ have a manual reset input?
- What is the purpose of the power-fail input (PFI) on the ADM705ARZ?
The power-fail input (PFI) is used to detect low battery conditions or monitor an additional power supply, triggering the power-fail output (PFO) when PFI is less than 1.25 V.
