參數資料
型號: AD7887AR
廠商: Analog Devices Inc
文件頁數: 8/24頁
文件大小: 0K
描述: IC ADC 12BIT 2CH SRL 8-SOIC
設計資源: Software Calibrated, 1 MHz to 8 GHz, 70 dB RF Power Measurement System Using AD8318 (CN0150)
標準包裝: 98
位數: 12
采樣率(每秒): 125k
數據接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉換器數目: 1
功率耗散(最大): 3.5mW
電壓電源: 單電源
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 8-SO
包裝: 管件
輸入數目和類型: 2 個單端,單極
AD7887
Rev. D | Page 16 of 24
SCLK
CS
DOUT
DIN
THE PART POWERS UP FROM
SHUTDOWN ON SCLK FALLING EDGE AS
PM1 = 1 AND PM0 = 0
1
16
1
16
2
t10 = 5s
THE PART ENTERS
SHUTDOWN AT THE END OF
CONVERSION AS PM1 = 1 AND PM0 = 0
CONTROL REGISTER DATA IS LOADED ON THE
FIRST EIGHT CLOCKS. PM1 = 1 AND PM0 = 0
PM1 = 1 AND PM0 = 0 TO KEEP THE
PART IN THIS MODE
DATA IN
FOUR LEADING ZEROS + CONVERSION RESULT
0
61
91
-0
18
Figure 18. Mode 3 Operation (Microcontroller for Slow SCLKs)
SCLK
CS
DOUT
DIN
1
16
8
1
16
8
1
16
8
PM1 = 0 AND PM0 = 1 TO PLACE
THE PART IN NORMAL MODE
PM1 = 1 AND PM0 = 0 TO PLACE
THE PART BACK IN MODE 3
CONTROL REGISTER DATA IS LOADED ON
THE FIRST EIGHT CLOCKS. PM1 = 1 AND PM0 = 0
THE PART ENTERS
SHUTDOWN AT THE END
OF CONVERSION AS
PM1 = 1 AND PM0 = 0
THE PART REMAINS POWERED UP
AS PM1 = 0 AND PM0 = 1
THE PART BEGINS TO POWER
UP FROM SHUTDOWN
THE PART ENTERS
SHUTDOWN AT THE END OF
CONVERSION AS PM1 = 1
AND PM0 = 0
DATA IN
FOUR LEADING ZEROS
+ CONVERSION RESULT
FOUR LEADING ZEROS
+ CONVERSION RESULT
FOUR LEADING ZEROS
+ CONVERSION RESULT
DATA IN
0
61
91
-0
19
Figure 19. Mode 3 Operation (Microcontroller for High Speed SCLKs)
SCLK
CS
DOUT
DIN
CONTROL REGISTER DATA IS LOADED ON
THE FIRST EIGHT CLOCKS. PM1 = 1 AND PM0 = 1
1
16
PM1 = 1 AND PM0 = 1 TO KEEP
THE PART IN THIS MODE
1
16
THE PART POWERS UP
FROM STANDBY ON SCLK
FALLING EDGE AS PM1 = 1
AND PM0 = 1
THE PART ENTERS
STANDBY AT THE END OF
CONVERSION AS
PM1 = 1 AND PM0 = 1
FOUR LEADING ZEROS + CONVERSION RESULT
DATA IN
FOUR LEADING ZEROS + CONVERSION RESULT
DATA IN
0
61
91
-02
0
Figure 20. Mode 4 Operation
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