參數(shù)資料
型號: THS0842IPFB
廠商: TEXAS INSTRUMENTS INC
元件分類: ADC
英文描述: 2-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48
封裝: GREEN, PLASTIC, TQFP-48
文件頁數(shù): 16/30頁
文件大小: 503K
代理商: THS0842IPFB
THS0842
DUAL-INPUT, 8-BIT, 40 MSPS LOW-POWER ANALOG-TO-DIGITAL CONVERTER
WITH SINGLE OR DUAL PARALLEL BUS OUTPUT
SLAS246A – DECEMBER 1999 – REVISED AUGUST 2000
23
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
analog input, single-ended connection (continued)
The single ended analog input can be dc coupled (Figure 24) as long as the input is within the analog input
common mode voltage range. A capacitor, C, connected from I/Q IN+ to I/Q IN– will help filter any high frequency
noise on the inputs, also improving performance. Note, that the value of capacitor C chosen must take into
account the highest frequency component of the analog input signal.
1.5 V
2 V
Single
Ended
Input
1 V
1.0 Vp–p
Figure 22. Single-Ended Input Waveform With AVDD = 3 V
A single-ended source may give better overall system performance if it is first converted to differential before
driving the THS0842.
THS0842
CML
R
AIN+
R
C1
C2
VIN
AIN–
REFT
REFB
VBIAS
+
Figure 23. AC-Coupled Input
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