Datasheet

ADS7828
6
SBAS181C
www.ti.com
Rise Time of SDA Signal t
RDA
Standard Mode 1000 ns
Fast Mode 20 + 0.1C
B
300 ns
High-Speed Mode, C
B
= 100pF max
(2)
10 80 ns
High-Speed Mode, C
B
= 400pF max
(2)
20 160 ns
Fall Time of SDA Signal t
FDA
Standard Mode 300 ns
Fast Mode 20 + 0.1C
B
300 ns
High-Speed Mode, C
B
= 100pF max
(2)
10 80 ns
High-Speed Mode, C
B
= 400pF max
(2)
20 160 ns
Setup Time for STOP Condition t
SU
;
STO
Standard Mode 4.0 µs
Fast Mode 600 ns
High-Speed Mode 160 ns
Capacitive Load for SDA and SCL C
B
400 pF
Line
Pulse Width of Spike Suppressed t
SP
Fast Mode 50 ns
High-Speed Mode 10 ns
Noise Margin at the HIGH Level for Standard Mode
Each Connected Device (Including V
NH
Fast Mode 0.2V
DD
V
Hysteresis) High-Speed Mode
Noise Margin at the LOW Level for Standard Mode
Each Connected Device (Including V
NL
Fast Mode 0.1V
DD
V
Hysteresis) High-Speed Mode
NOTES: (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.
(3) A device must internally provide a data hold time to bridge the undefined part between V
IH
and V
IL
of the falling edge of the SCLH signal. An
input circuit with a threshold as low as possible for the falling edge of the SCLH signal minimizes this hold time.
TIMING CHARACTERISTICS
(1)
(Cont.)
At T
A
= –40°C to +85°C, +V
DD
= +2.7V, unless otherwise noted.
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS