參數(shù)資料
型號(hào): AD7877ACPZ-REEL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 17/45頁(yè)
文件大?。?/td> 0K
描述: IC ADC 12BIT TOUCHSCREEN 32LFCSP
標(biāo)準(zhǔn)包裝: 1,500
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(píng)估套件: 可供
數(shù)據(jù)接口: 串行,SPI?
數(shù)據(jù)速率/采樣率 (SPS,BPS): 125k
電壓基準(zhǔn): 外部,內(nèi)部
電源電壓: 2.7 V ~ 5.25 V
電流 - 電源: 1µA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 32-LFCSP-VQ
包裝: 帶卷 (TR)
配用: EVAL-AD7877EBZ-ND - BOARD EVALUATION FOR AD7877
Data Sheet
AD7877
Rev. D | Page 23 of 44
037
96-
016
LIMIT COMPARISON
START FCD TIMER
UPDATE ALERT
ENABLE/STATUS
REGISTER
CONVERT
SELECTED CHANNEL
IS FCD
FINISHED?
HOST PROGRAMS
AD7877 IN MODE 01
NO
YES
NO
YES
NO
YES
NO
YES
NO
IS AVERAGING
FINISHED?
ONCE-ONLY
MODE?
WRITE RESULT TO
REGISTERS
GO TO MODE 00
ALERT
SOURCE
ENABLED?
IS ACQUISITION
TIME FINISHED?
TIMER
FINISHED?
IS FCD
REQUIRED?
START ACQUISITION TIMER
START TIMER
OUT-OF-LIMIT?
ASSERT ALERT
OUTPUT1
YES
NO
YES
NO
1SEE SEQUENCER REGISTERS SECTION.
IS STOPACQ
SIGNAL ACTIVE?
NO
IS STOPACQ
SIGNAL ACTIVE?
NO
YES
Figure 38. Single Channel Operation
0379
6-
017
YES
NO
ONCE-ONLY
MODE?
GO TO MODE 00
TIMER
FINISHED?
START TIMER
NO
YES
1SEE SEQUENCER REGISTERS SECTION.
LIMIT COMPARISON
START FCD TIMER
UPDATE ALERT
ENABLE/STATUS
REGISTER
CONVERT
SELECTED CHANNEL
IS FCD
FINISHED?
HOST PROGRAMS
AD7877 IN MODE 10
NO
YES
NO
YES
NO
YES
NO
IS AVERAGING
FINISHED?
WRITE RESULT TO
REGISTERS
ALERT
SOURCE
ENABLED?
IS ACQUISITION
TIME FINISHED?
IS FCD
REQUIRED?
START ACQUISITION TIMER
OUT-OF-LIMIT?
ASSERT ALERT
OUTPUT1
YES
NO
YES
NO
VALID
SEQUENCE 0?
SELECT NEXT
CHANNEL
GO TO MODE 00
LAST CHANNEL
IN SEQUENCE?
YES
NO
YES
IS STOPACQ
SIGNAL ACTIVE?
NO
YES
IS STOPACQ
SIGNAL ACTIVE?
YES
NO
Figure 39. Slave Mode Sequencer Operation
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