ad7887ar-reel Analog Devices, Inc., ad7887ar-reel Datasheet - Page 16

• Manufacturer Part Number: ad7887ar-reel
• Description: 2.7 V To 5.25 V, Micropower, 2-channel, 125 Ksps, 12-bit Adc In 8-lead Msop
• Manufacturer: Analog Devices, Inc.

AD7887
DOUT
DOUT
SCLK
SCLK
DIN
DIN
CS
CS
DOUT
SCLK
DIN
THE FIRST EIGHT CLOCKS. PM1 = 1 AND PM0 = 0
CS
CONTROL REGISTER DATA IS LOADED ON
CONTROL REGISTER DATA IS LOADED ON THE
FIRST EIGHT CLOCKS. PM1 = 1 AND PM0 = 0
1
1
FOUR LEADING ZEROS + CONVERSION RESULT
FOUR LEADING ZEROS + CONVERSION RESULT
SHUTDOWN AT THE END
1
THE FIRST EIGHT CLOCKS. PM1 = 1 AND PM0 = 1
DATA IN
DATA IN
+ CONVERSION RESULT
OF CONVERSION AS
PM1 = 1 AND PM0 = 0
FOUR LEADING ZEROS
THE PART ENTERS
DATA IN
CONTROL REGISTER DATA IS LOADED ON
CONVERSION AS PM1 = 1 AND PM0 = 0
8
SHUTDOWN AT THE END OF
THE PART ENTERS
Figure 19. Mode 3 Operation (Microcontroller for High Speed SCLKs)
16
Figure 18. Mode 3 Operation (Microcontroller for Slow SCLKs)
STANDBY AT THE END OF
THE PART BEGINS TO POWER
PM1 = 1 AND PM0 = 1
THE PART ENTERS
CONVERSION AS
UP FROM SHUTDOWN
Figure 20. Mode 4 Operation
16
1
16
Rev. C | Page 16 of 24
DATA IN
PM1 = 0 AND PM0 = 1 TO PLACE
+ CONVERSION RESULT
THE PART IN NORMAL MODE
FOUR LEADING ZEROS
SHUTDOWN ON SCLK FALLING EDGE AS
8
THE PART POWERS UP FROM
THE PART REMAINS POWERED UP
PM1 = 1 AND PM0 = 0
AS PM1 = 0 AND PM0 = 1
FALLING EDGE AS PM1 = 1
FROM STANDBY ON SCLK
THE PART POWERS UP
PM1 = 1 AND PM0 = 0 TO KEEP THE
16
t
1
10
1
AND PM0 = 1
= 5µs
PART IN THIS MODE
FOUR LEADING ZEROS + CONVERSION RESULT
2
FOUR LEADING ZEROS + CONVERSION RESULT
DATA IN
DATA IN
PM1 = 1 AND PM0 = 1 TO KEEP
1
DATA IN
+ CONVERSION RESULT
PM1 = 1 AND PM0 = 0 TO PLACE
THE PART IN THIS MODE
FOUR LEADING ZEROS
THE PART BACK IN MODE 3
SHUTDOWN AT THE END OF
CONVERSION AS PM1 = 1
THE PART ENTERS
8
AND PM0 = 0
16
16
16