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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)： | 19/22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
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
AC-coupled single-ended configuration
If the application does not require the signal bandwidth to include dc, the level shift shown in Figure 4 is not
necessary.
IN+
IN–
THS1401/3/8
REF+
REF–
+
–
10 nF
10 k
10 k
10 k
10 k
100 pF
100 pF
22
10 k
10 k
Figure 22. Single-Ended With Level Shift
Because the signal swing on the op-amp is centered around ground, it is more likely that the signal stays within
the linear region of the op-amp transfer function, thus increasing the overall ac performance.
IN [VPEAK]
–
REF
0
REF
OUTPUT [PEAK]
– full scale
0
+ full scale
Compared to the transformer-coupled configuration, the swing on IN– is twice as big, which can decrease the
ac performance (SNR, SFD, and THD).
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