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參數(shù)資料
| 型號： | THS1408PFB |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 14-BIT, 1/3/8 MSPS DSP COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS WITH INTERNAL REFERENCE AND PGA |
| 中文描述： | 14位，1/3/8 MSPS的數(shù)字信號處理器兼容模擬到數(shù)字的，具有內(nèi)部參考和PGA變換器 |
| 文件頁數(shù)： | 17/22頁 |
| 文件大?。?/td> | 312K |
| 代理商： | THS1408PFB |
THS1401, THS1403, THS1408
14-BIT, 1/3/8 MSPS DSP COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS
WITH INTERNAL REFERENCE AND PGA
SLAS248 – DECEMBER 1999
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
transformer coupled single-ended to differential configuration
If the application requires the best SNR, SFDR, and THD performance, the input should be transformer coupled.
The signal amplitude on both inputs of the ADC is one half as high as in a single-ended configuration thus
increasing the ADC ac performance.
100 pF
IN+
IN–
THS1401/3/8
CML
R
100 pF
22
22
+
1
μ
F
0.1
μ
F
Figure 20. Transformer Coupled
IN [VPEAK]
–
REF
0
REF
n = 1 (winding ratio)
OUTPUT [PEAK]
– full scale
0
+ full scale
The resistor R of the transformer coupled input configuration must be set to match the signal source impedance
R = n
2
Rs, where Rs is the source impedance and n is the transformer winding ratio.
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