Key facts
- Brand
- Analog Devices
- Model
- AD1819A
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-02
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ANALOG DEVICES Engineer To Engineer Note EE-59 Codec Soundbytes Manual
This Engineer's Note covers the crystal requirements for clocking Analog Devices AC97 codecs, including the AD1819 and AD1881 models. It specifies that a 24.576MHz quartz crystal is required for AC97 1.03 compliance, with a frequency tolerance of less than +100 PPM. The document advises against using ceramic crystals or LC resonators due to their higher frequency tolerances, which can degrade audio performance.
Read onlineAnalog Devices AD1819A specifications
| Required Crystal Frequency | 24.576MHz |
|---|---|
| Frequency Tolerance | less +100 PPM |
| Operating Temperature Range | 0°C to 70°C |
| Recommended Load Capacitance | 18pF |
| Maximum Drive Level | 1 mw |
Source: ANALOG DEVICES Engineer To Engineer Note EE-59 Codec Soundbytes Manual
All Analog Devices AD1819A documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What type of crystal is recommended for AC97 codecs?
ADI recommends QUARTZ crystals only because they meet the required frequency tolerance and stability.
From: ANALOG DEVICES Engineer To Engineer Note EE-59 Codec Soundbytes Manual
Can ceramic crystals be used for AC97 codecs?
Ceramic crystals are not recommended as they have frequency tolerances greater than +5000 PPM, which may result in audio performance less than AC97.
From: ANALOG DEVICES Engineer To Engineer Note EE-59 Codec Soundbytes Manual