參數(shù)資料
型號: AD7490BRU
廠商: Analog Devices Inc
文件頁數(shù): 8/29頁
文件大小: 0K
描述: IC ADC 12BIT 16CH 1MSPS 28TSSOP
產(chǎn)品變化通告: IDD Specification Change 17/Jun/2009
標準包裝: 50
位數(shù): 12
采樣率(每秒): 1M
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉換器數(shù)目: 1
功率耗散(最大): 12.5mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 28-TSSOP
包裝: 管件
輸入數(shù)目和類型: 16 個單端,單極
Data Sheet
AD7490
Rev. D | Page 15 of 28
Figure 14 shows how a sequence of consecutive channels can be
converted on without having to program the Shadow register or
write to the part on each serial transfer. Again, to exit this mode
of operation and revert back to the normal mode of operation
of a multichannel ADC (as outlined in Figure 12), ensure that
the WRITE = 1 and SEQ = SHADOW = 0 on the next serial
transfer.
02
69
1
-01
3
CONTINUOUSLY CONVERTS ON THE
SELECTED SEQUENCE OF CHANNELS BUT
WILL ALLOW RANGE, CODING, AND SO ON,
TO CHANGE IN THE CONTROL REGISTER
WITHOUT INTERRUPTING THE SEQUENCE
PROVIDED, SEQ = 1, SHADOW = 0
DUMMY CONVERSIONS
DIN = ALL 1s
DIN: WRITE TO CONTROL REGISTER,
WRITE BIT = 1,
SELECT CODING, RANGE, AND POWER MODE
SELECT CHANNEL ADD3 TO ADD0 FOR
CONVERSION,
SEQ = 1 SHADOW = 1
CS
DOUT: CONVERSION RESULT FROM
CHANNEL 0
CONTINUOUSLY CONVERTS ON A
CONSECUTIVE SEQUENCE OF CHANNELS
FROM CHANNEL 0 UP TO AND INCLUDING
THE PREVIOUSLY SELECTED ADD3 TO ADD0
IN THE CONTROL REGISTER
CS
WRITE BIT = 1,
SEQ = 1,
SHADOW = 0
POWER ON
WRITE
BIT = 0
WRITE BIT = 1,
SEQ = 1,
SHADOW = 0
Figure 14. SEQ Bit = 1, SHADOW Bit = 1 Flowchart
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