fCLK 0.3 12.5" />
參數(shù)資料
型號(hào): AD7722ASZ
廠商: Analog Devices Inc
文件頁數(shù): 20/24頁
文件大?。?/td> 0K
描述: IC ADC 16BIT 195KSPS 44-MQFP
標(biāo)準(zhǔn)包裝: 1
位數(shù): 16
采樣率(每秒): 220k
數(shù)據(jù)接口: 串行,并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 375mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 44-QFP
供應(yīng)商設(shè)備封裝: 44-MQFP(10x10)
包裝: 托盤
輸入數(shù)目和類型: 1 個(gè)差分,單極;1 個(gè)差分,雙極
REV. B
AD7722
–5–
TIMING SPECIFICATIONS
Parameter
Symbol
Min
Typ
Max
Unit
CLKIN Frequency
fCLK
0.3
12.5
15
MHz
CLKIN Period (tCLK = 1/fCLK)t1
0.067
0.08
3.33
s
CLKIN Low Pulse Width
t2
0.45
× t
1
0.55
× t
1
CLKIN High Pulse Width
t3
0.45
× t
1
0.55
× t
1
CLKIN Rise Time
t4
5ns
CLKIN Fall Time
t5
5ns
FSI Low Time
t6
2tCLK
FSI Setup Time
t7
20
ns
FSI Hold Time
t8
20
ns
CLKIN to SCO Delay
t9
40
ns
SCO Period
1
t10
2tCLK
SCO Transition to FSO High Delay
t11
410
ns
SCO Transition to FSO Low Delay
t12
410
ns
SCO Transition to SDO Valid Delay
t13
38
ns
SCO Transition from FSI
2
t14
2.5
tCLK
SDO Enable Delay Time
t15
30
45
ns
SDO Disable Delay Time
t16
10
30
ns
DRDY High Time
t17
2tCLK
Conversion Time
1
t18
64
tCLK
DRDY to CS Setup Time
t19
0ns
CS to RD Setup Time
t20
0ns
RD Pulse Width
t21
tCLK + 20
ns
Data Access Time after
RD Falling Edge3
t22
tCLK + 40
ns
Bus Relinquish Time after
RD Rising Edge
t23
tCLK + 40
ns
CS to RD Hold Time
t24
0ns
RD to DRDY High Time
t25
1tCLK
SYNC/RESET Input Pulse Width
t26
10
ns
DVAL Low Delay from SYNC/RESET
t27
40
ns
SYNC/RESET Low Time after CLKIN Rising
t28
10
tCLK – 10
ns
DRDY High Delay after SYNC/RESET Low
t29
50
ns
DRDY Low Delay after SYNC/RESET Low1
t30
(8192 + 64)
tCLK
DVAL High Delay after SYNC/RESET Low
1
t31
8192
tCLK
CAL Setup Time
t34
10
ns
CAL Pulse Width
t35
12
tCLK
Calibration Delay from CAL High
t36
64
tCLK
Unipolar Input Calibration Time, (
UNI = 0)1, 4 t
37
(3
× 8192 + 2 × 512)
tCLK
Bipolar Input Calibration Time, (
UNI = 1)1, 4
t37
(4
× 8192 + 3 × 512)
tCLK
Conversion Results Valid, (
UNI = 0)1
t38
(3
× 8192 + 2 × 512 + 64)
tCLK
Conversion Results Valid, (
UNI = 1)1
t38
(4
× 8192 + 3 × 512 + 64)
tCLK
NOTES
1Guaranteed by design.
2Frame sync is initiated on falling edge of CLKIN.
3With
RD synchronous to CLKIN, t
22 can be reduced up to 1 tCLK.
4See Figure 8.
Specifications subject to change without notice.
(AVDD = 5 V
5%, DVDD = 5 V
5%, AGND = DGND = 0 V, CL = 50 pF, TA = TMIN to TMAX,
fCLKIN = 12.5 MHz, SFMT = Logic Low or High, CFMT = Logic Low or High.)
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