Datasheet

t
R
t
BUF
t
LOW
t
F
t
HD; STA
t
SP
t
HD; STA
t
SU; STA
t
HD; DAT
t
SU; DAT
t
HIGH
t
SU; STO
SCL
SDA
START REPEATED
START
STOP
ADS7830
www.ti.com SBAS302C –DECEMBER 2003–REVISED OCTOBER 2012
TIMING DIAGRAM
TIMING CHARACTERISTICS
(1)
At T
A
= –40°C to +125°C and +V
DD
= +2.7V, unless otherwise noted.
PARAMETER SYMBOL CONDITIONS MIN MAX UNIT
Standard Mode 100 kHz
Fast Mode 400 kHz
SCL Clock Frequency f
SCL
High-Speed Mode, C
B
= 100pF max 3.4 MHz
High-Speed Mode, C
B
= 400pF max 1.7 MHz
Standard Mode 4.7 µs
Bus Free Time Between a STOP
t
BUF
and START Condition
Fast Mode 1.3 µs
Standard Mode 4.0 µs
Hold Time (Repeated) START
t
HD; STA
Fast Mode 600 ns
Condition
High-Speed Mode 160 ns
Standard Mode 4.7 µs
Fast Mode 1.3 µs
LOW Period of the SCL Clock t
LOW
High-Speed Mode, C
B
= 100pF max
(2)
160 ns
High-Speed Mode, C
B
= 400pF max
(2)
320 ns
Standard Mode 4.0 µs
Fast Mode 600 ns
HIGH Period of the SCL Clock t
HIGH
High-Speed Mode, C
B
= 100pF max
(2)
60 ns
High-Speed Mode, C
B
= 400pF max
(2)
120 ns
Standard Mode 4.7 µs
Setup Time for a Repeated
t
SU; STA
Fast Mode 600 ns
START Condition
High-Speed Mode 160 ns
Standard Mode 250 ns
Data Setup Time t
SU; DAT
Fast Mode 100 ns
High-Speed Mode 10 ns
(1) All values referred to V
IHMIN
and V
ILMAX
levels.
(2) For bus line loads C
B
between 100pF and 400pF the timing parameters must be linearly interpolated.
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