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參數(shù)資料
| 型號(hào)： | FAQADS1212 |
| 英文描述： | FAQ ADS1212 - Application Tips for the ADS1212 |
| 中文描述： | 常見(jiàn)問(wèn)題ADS1212 - ADS1212中的應(yīng)用技巧 |
| 文件頁(yè)數(shù)： | 2/2頁(yè) |
| 文件大小： | 12K |
| 代理商： | FAQADS1212 |
MP100 for the XIN and XOUT pins. This part is a 10MHz crystal. A crystal, instead of a clock
oscillator, was chosen because it produced a sine wave as opposed to a square wave. It was found
through characterization, that a square wave system clock for the ADS1210 and ADS1211 degraded
CMR and PSR. Additionally, a square wave type signal increased the noise level enough to disallow
23-bit type performance.
10.
Commonly Asked Questions - The A/D converter will occasionally go into a latch
mode at power up. In this state, the A/D converter will draw excessive currents.
What is the problem and how do I solve it
- If the digital voltage exceeds the analog voltage
by 0.3V an SCR on the chip will be enabled. Once this parasitic device is turned on, the only way to
stop it from drawing exorbitant currents is to power the entire A/D converter down. This condition can
be avoided by insuring that the analog power is greater than or equal to the digital power supply.
11.
Commonly Asked Questions - What is the definition of “TTL Load” for this
product
- There are several types of TTL logic with various fan-out specifications, however, the
specification for these products are defined with the industry standard TTL load of 1.6mA. Therefore, 2
TTL loads would be equal to 3.2mA.
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