AD5337/AD5338/AD5339
TIMING CHARACTERISTICS
VDD = 2.5 V to 5.5 V. All specifications TMIN to TMAX, unless otherwise noted.
Table 3.
Parameter
fSCL
t1
t2
t3
t4
t5
t61
t7
t8
t9
t10
t11
CB
Limit at TMIN, TMAX
(A and B Versions)
400
2.5
0.6
1.3
0.6
100
0.9
0
0.6
0.6
1.3
300
0
250
0
300
20 + 0.1 CB2
400
Unit
kHz max
µs min
µs min
µs min
µs min
ns min
µs max
µs min
µs min
µs min
µs min
ns max
ns min
ns max
ns min
ns max
ns min
pF max
Conditions/Comments
SCL clock frequency
SCL cycle time
tHIGH, SCL high time
tLOW, SCL low time
tHD, STA, start/repeated start condition hold time
tSU, DAT, data setup time
tHD, DAT, data hold time
tHD, DAT, data hold time
tSU, STA, setup time for repeated start
tSU, STO, stop condition setup time
tBUF, bus free time between a stop and a start condition
tR, rise time of SCL and SDA when receiving
tR, rise time of SCL and SDA when receiving (CMOS-compatible)
tF, fall time of SDA when transmitting
tF, fall time of SDA when receiving (CMOS-compatible)
tF, fall time of SCL and SDA when receiving
tF, fall time of SCL and SDA when transmitting
Capacitive load for each bus line
1 A master device must provide a hold time of at least 300 ns for the SDA signal (referred to VIH min of the SCL signal) in order to bridge the undefined region of SCL’s
falling edge.
2 CB is the total capacitance of one bus line in pF; tR and tF measured between 0.3 VDD and 0.7 VDD.
SDA
t9
t3
t10
t11
t4
SCL
t4
START
CONDITION
t6
t2
t5
t1
t7
REPEATED
START
CONDITION
Figure 2. 2-Wire Serial Interface Timing Diagram
t8
STOP
CONDITION
Rev. A | Page 6 of 24