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參數資料
| 型號： | AD7665AST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 16-Bit, 570 kSPS CMOS ADC |
| 中文描述： | 4-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48 |
| 封裝： | LOW PROFILE, MS-026BBC, QFP-48 |
| 文件頁數： | 4/24頁 |
| 文件大小： | 348K |
| 代理商： | AD7665AST |
REV. 0
AD7665
–4–
TIMING SPECIFICATIONS
(Continued)
Symbol
Min
Typ
Max
Unit
SYNC Asserted to SCLK First Edge Delay
3
Internal SCLK Period
3
Internal SCLK HIGH
3
Internal SCLK LOW
3
SDOUT Valid Setup Time
3
SDOUT Valid Hold Time
3
SCLK Last Edge to SYNC Delay
3
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 Convert
3
CNVST
LOW to SYNC Asserted Delay
Master Serial Read after Convert
SYNC Deasserted to BUSY LOW Delay
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
t
18
t
19
t
20
t
21
t
22
t
23
t
24
t
25
t
26
t
27
t
28
t
29
4
25
15
9.5
4.5
2
3
ns
ns
ns
ns
ns
ns
40
10
10
10
ns
ns
ns
μ
s
μ
s
See Table II
0.75/1/1.25
t
30
25
ns
t
31
t
32
t
33
t
34
t
35
t
36
t
37
5
3
5
5
25
10
10
ns
ns
ns
ns
ns
ns
ns
16
NOTES
1
In warp mode only, the maximum time between conversions is 1 ms, otherwise, there is no required maximum time.
2
In 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.
3
In serial master read during convert mode. See Table II.
Specifications subject to change without notice.
Table II. Serial Clock Timings in Master Read after Convert
DIVSCLK[1]
DIVSCLK[0]
0
0
0
1
1
0
1
1
Unit
SYNC to SCLK First Edge Delay Minimum
Internal SCLK Period Minimum
Internal SCLK Period Maximum
Internal SCLK HIGH Minimum
Internal SCLK LOW Minimum
SDOUT Valid Setup Time Minimum
SDOUT Valid Hold Time Minimum
SCLK Last Edge to SYNC Delay Minimum
BUSY HIGH Width Maximum (Warp)
BUSY HIGH Width Maximum (Normal)
BUSY HIGH Width Maximum (Impulse)
t
18
t
19
t
19
t
20
t
21
t
22
t
23
t
24
t
28
t
28
t
28
4
25
40
15
9.5
4.5
2
3
1.5
1.75
2
20
50
70
25
24
22
4
60
2
2.25
2.5
20
100
140
50
49
22
30
140
3
3.25
3.5
20
200
280
100
99
22
90
300
5.25
5.5
5.75
ns
ns
ns
ns
ns
ns
ns
ns
μ
s
μ
s
μ
s
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