TIMING DIAGRAM
SDA
tBUF
tLOW
tR
tF
tHD; STA
tSP
SCL
tHD; STA
tSU; STA
tSU; STO
tHD; DAT
tHIGH
tSU; DAT
STOP START
REPEATED
START
TIMING CHARACTERISTICS(1)
At TA = –40°C to +85°C, +VDD = +2.7V, unless otherwise noted.
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
SCL Clock Frequency
fSCL
Standard Mode
Fast Mode
High-Speed Mode, CB = 100pF max
High-Speed Mode, CB = 400pF max
100
400
3.4
1.7
kHz
kHz
MHz
MHz
Bus Free Time Between a STOP and
START Condition
tBUF
Standard Mode
Fast Mode
4.7
1.3
µs
µs
Hold Time (Repeated) START
Condition
tHD;STA
Standard Mode
Fast Mode
High-Speed Mode
4.0
600
160
µs
ns
ns
LOW Period of the SCL Clock
tLOW
Standard Mode
Fast Mode
High-Speed Mode, CB = 100pF max(2)
High-Speed Mode, CB = 400pF max(2)
4.7
1.3
160
320
µs
µs
ns
ns
HIGH Period of the SCL Clock
tHIGH
Standard Mode
Fast Mode
High-Speed Mode, CB = 100pF max(2)
High-Speed Mode, CB = 400pF max(2)
4.0
600
60
µs
ns
ns
ns
120
Setup Time for a Repeated START
Condition
tSU;STA
Standard Mode
Fast Mode
High-Speed Mode
4.7
600
160
µs
ns
ns
Data Setup Time
Data Hold Time
tSU DAT
;
Standard Mode
Fast Mode
High-Speed Mode
250
100
10
ns
ns
ns
tHD;DAT
Standard Mode
Fast Mode
High-Speed Mode, CB = 100pF max(2)
High-Speed Mode, CB = 400pF max(2)
0
0
0(3)
0(3)
3.45
0.9
70
µs
µs
ns
ns
150
Rise Time of SCL Signal
tRCL
tRCL1
tFCL
Standard Mode
Fast Mode
High-Speed Mode, CB = 100pF max(2)
High-Speed Mode, CB = 400pF max(2)
1000
300
40
ns
ns
ns
ns
20 + 0.1CB
10
20
80
Rise Time of SCL Signal After a
Repeated START Condition and
After an Acknowledge Bit
Standard Mode
Fast Mode
High-Speed Mode, CB = 100pF max(2)
High-Speed Mode, CB = 400pF max(2)
1000
300
80
ns
ns
ns
ns
20 + 0.1CB
10
20
160
Fall Time of SCL Signal
Standard Mode
Fast Mode
High-Speed Mode, CB = 100pF max(2)
High-Speed Mode, CB = 400pF max(2)
300
300
40
ns
ns
ns
ns
20 + 0.1CB
10
20
80
ADS7830
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