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參數(shù)資料
型號: AD7843ARQZ-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 3/21頁
文件大?。?/td> 0K
描述: IC ADC 12BIT TOUCHSCREEN 16-QSOP
標準包裝: 1,000
類型: 電阻
觸摸面板接口: 4 線
輸入數(shù)/鍵: 1 TSC
分辨率(位): 12 b
評估套件: 可供
數(shù)據(jù)接口: 串行
數(shù)據(jù)速率/采樣率 (SPS,BPS): 125k
電壓基準: 外部
電源電壓: 2.2 V ~ 5.25 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 16-QSOP
包裝: 帶卷 (TR)
配用: EVAL-AD7843EBZ-ND - BOARD EVAL FOR AD7843
AD7843
Rev. B | Page 10 of 20
–120
–100
–80
–60
–40
–20
0
P
S
RR
(dB)
0
1020
3040
50
6070
8090
100
VCC RIPPLE FREQUENCY (kHz)
02144-B
-016
VCC = 3V, VREF = 2.5V
100mV p-p SINEWAVE ON +VCC
fSAMPLE = 125kHz, fIN = 20kHz
Figure 16. AC PSRR vs. Supply Ripple Frequency
Figure 16 shows the power supply rejection ratio versus VCC
supply frequency for the AD7843. The power supply rejection
ratio is defined as the ratio of the power in the ADC output at
full-scale frequency fS to the power of a 100 mV sine wave
applied to the ADC VCC supply of frequency fS:
PSRR (dB) = 10 log (Pf/Pfs)
where:
Pf is the power at frequency f in ADC output.
Pfs is the power at frequency fS coupled onto the ADC VCC
supply.
Here a 100 mV p-p sine wave is coupled onto the VCC supply.
Decoupling capacitors of 10 F and 0.1 F were used on the
supply.
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AD7843ARQZ-REEL IC ADC 12BIT TOUCHSCREEN 16-QSOP
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