AD7999 查看數據表（PDF） - Analog Devices
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AD7999 Datasheet PDF : 28 Pages
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AD7991/AD7995/AD7999
I2C TIMING SPECIFICATIONS
Guaranteed by initial characterization. All values were measured with the input filtering enabled. CB refers to the capacitive load on the bus line,
with tr and tf measured between 0.3 VDD and 0.7 VDD (see Figure 2). Unless otherwise noted, VDD = 2.7 V to 5.5 V and TA = TMIN to TMAX.
Table 5.
Parameter
fSCL 1
t11
t21
t31
t41, 2
t51
t61
t71
t81
t9
Conditions
Standard mode
Fast mode
High speed mode
CB = 100 pF maximum
CB = 400 pF maximum
Standard mode
Fast mode
High speed mode
CB = 100 pF maximum
CB = 400 pF maximum
Standard mode
Fast mode
High speed mode
CB = 100 pF maximum
CB = 400 pF maximum
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High Speed mode
CB = 100 pF maximum
CB = 400 pF maximum
Standard mode
Fast mode
High Speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
CB = 100 pF maximum
CB = 400 pF maximum
Limit at tMIN, tMAX
Min
Typ Max
100
400
3.4
1.7
4
0.6
60
120
4.7
1.3
160
320
250
100
10
0
3.45
0
0.9
0
0
4.7
0.6
160
4
0.6
160
4.7
1.3
4
0.6
160
20 + 0.1 CB
703
150
1000
300
10
80
20
160
Unit Description
kHz Serial clock frequency
kHz
MHz
MHz
μs
μs
tHIGH, SCL high time
ns
ns
μs
tLOW, SCL low time
μs
ns
ns
ns
tSU;DAT, data setup time
ns
ns
μs
tHD;DAT, data hold time
μs
ns
ns
μs
tSU;STA, setup time for a repeated start condition
μs
ns
μs
tHD;STA, hold time for a repeated start condition
μs
ns
μs
tBUF, bus-free time between a stop and a start condition
μs
μs
tSU;STO, setup time for a stop condition
μs
ns
ns
tRDA, rise time of the SDA signal
ns
ns
ns
Rev. A | Page 9 of 28
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