Key facts
- Brand
- Analog Devices
- Model
- AD7418
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-02
Start here
Analog Devices AN-588 AD7416/AD7417/AD7418 Power-On Reset Circuit Application Note
This document addresses the issue where the Vpp line takes too long to discharge to 0 V when power is switched off, potentially causing the AD7416/AD7417/AD7418 to reset into an unknown state if power is reapplied too quickly. The text explains that using large decoupling capacitors on the Vpp line can result in residual voltage as high as 0.5 V after power-off.
Read onlineAnalog Devices AD7418 specifications
| Resolution | 10 Bits |
|---|---|
| Operating Supply Range | 2.7 V to 5.5 V |
| Temperature Sensor Range | -40°C to +125°C |
| Conversion Time (Channels 1-4) | 15 us max |
| Temperature Sensor Conversion Time | 30 us max |
All Analog Devices AD7418 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What causes the AD7416/AD7417/AD7418 to reset into an unknown state?
Applying power before the Vpp line has fully discharged to 0 V can cause the internal circuitry to not fully switch off.
From: Analog Devices AN-588 AD7416/AD7417/AD7418 Power-On Reset Circuit Application Note
What voltage level indicates the PNP transistor starts switching off?
The PNP transistor in the recommended circuit starts switching off when the main Vpp line falls below approximately 1 V.
From: Analog Devices AN-588 AD7416/AD7417/AD7418 Power-On Reset Circuit Application Note
What is the default temperature for the OTI output?
The default temperature setting for the overtemperature indicator is 80°C.
How many devices can be connected to a single bus?
Up to eight AD7416/AD7417s can be connected to a single serial bus.