AD7722AS Просмотр технического описания (PDF) - Analog Devices

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AD7722AS

16-Bit, 195 kSPS CMOS, Σ-Δ ADC

Analog Devices 

AD7722

CLKIN

64 CKLIN CYCLES

SCO

(CFMT = 0)

FSO

(SFMT = 0)

32 SCO CYCLES

SCO

VALID DATA FOR 16 SCO CYCLES

ZERO FOR LAST 16 SCO CYCLES VALID

Figure 2a. Generalized Serial Mode Timing (FSI = Logic Low or High, TSI = DOE)

CLKIN

64 CKLIN CYCLES

SCO

(CFMT = 0)

FSO

(SFMT = 1)

32 SCO CYCLES

LOW FOR 16 SCO CYCLES

HIGH FOR LAST 16 SCO CYCLES

SCO

VALID DATA FOR 16 SCO CYCLES

ZERO FOR LAST 16 SCO CYCLES VALID

Figure 2b. Generalized Serial Mode Timing (FSI = Logic Low or High, TSI = DOE)

CLKIN

2.3V

FSI

t5

t4

0.8V

t1

t6

t9

t8

t7

t2

t3

SCO

t9

t10

Figure 3. Serial Mode Timing for Clock Input, Frame Sync Input, and Serial Clock Output

CLKIN

FSI

SCO

SFMT = LOGIC FSO

LOW(0)

SDO

t1

t10

t11

t12

t14

D15

D14

D13

t13

D1

D0

SCO

SFMT = LOGIC FSO

HIGH(1)

LOW FOR

D15–D0

t12

t13

SDO

D15

D14

D13

t11

D1

D0

Figure 4. Serial Mode Timing for Frame Sync Input, Frame Sync Output, Serial Clock Output,

and Serial Data Output (CFMT = Logic Low, TSI = DOE)

–6–

REV. B

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