EVAL-AD7665CB Просмотр технического описания (PDF) - Analog Devices
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EVAL-AD7665CB Datasheet PDF : 24 Pages
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AD7665
TIMING SPECIFICATIONS (Continued)
Symbol Min
Typ
Max
SYNC Asserted to SCLK First Edge Delay3
Internal SCLK Period3
Internal SCLK HIGH3
Internal SCLK LOW3
SDOUT Valid Setup Time3
SDOUT Valid Hold Time3
SCLK Last Edge to SYNC Delay3
CS HIGH to SYNC HI-Z
CS HIGH to Internal SCLK HI-Z
CS HIGH to SDOUT HI-Z
BUSY HIGH in Master Serial Read After Convert3
CNVST LOW to SYNC Asserted Delay
Master Serial Read after Convert
SYNC Deasserted to BUSY LOW Delay
t18
4
t19
25
t20
15
t21
9.5
t22
4.5
t23
2
t24
3
t25
t26
t27
t28
t29
t30
Refer to Figures 19 and 21 (Slave Serial Interface Modes)
External SCLK Setup Time
External SCLK Active Edge to SDOUT Delay
SDIN Setup Time
SDIN Hold Time
External SCLK Period
External SCLK HIGH
External SCLK LOW
t31
5
t32
3
t33
5
t34
5
t35
25
t36
10
t37
10
40
10
10
10
See Table II
0.75/1/1.25
25
16
NOTES
1In warp mode only, the maximum time between conversions is 1 ms, otherwise, there is no required maximum time.
2In serial interface modes, the SYNC, SCLK, and SDOUT timings are defined with a maximum load C L of 10 pF; otherwise, the load is 60 pF maximum.
3In serial master read during convert mode. See Table II.
Specifications subject to change without notice.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
Table II. Serial Clock Timings in Master Read after Convert
DIVSCLK[1]
DIVSCLK[0]
SYNC to SCLK First Edge Delay Minimum
t18
Internal SCLK Period Minimum
t19
Internal SCLK Period Maximum
t19
Internal SCLK HIGH Minimum
t20
Internal SCLK LOW Minimum
t21
SDOUT Valid Setup Time Minimum
t22
SDOUT Valid Hold Time Minimum
t23
SCLK Last Edge to SYNC Delay Minimum
t24
BUSY HIGH Width Maximum (Warp)
t28
BUSY HIGH Width Maximum (Normal)
t28
BUSY HIGH Width Maximum (Impulse)
t28
0
0
1
1
0
1
0
1
4
20
20
20
25
50
100
200
40
70
140
280
15
25
50
100
9.5
24
49
99
4.5
22
22
22
2
4
30
90
3
60
140
300
1.5
2
3
5.25
1.75
2.25
3.25
5.5
2
2.5
3.5
5.75
Unit
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
µs
–4–
REV. 0
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