ADT7310
Data Sheet
 
Rev. A | Page 4 of 24
SPI TIMING SPECIFICATIONS
TA = 55癈 to +150癈, VDD = 2.7 V to 5.5 V, unless otherwise noted. All input signals are specified with rise time (tR) = fall time (tF) = 5 ns
(10% to 90% of VDD) and timed from a voltage level of 1.6 V.
Table 2.
Parameter
1, 2
 
Limit at TMIN, TMAX (B Version)
Unit
Conditions/Comments
t1
0
ns min
CS
 falling edge to SCLK active edge setup time
3
 
t2
100
ns min
SCLK high pulse width
t3
100
ns min
SCLK low pulse width
t
4
 
30
ns min
Data valid to SCLK edge setup time
t
5
 
25
ns min
Data valid to SCLK edge hold time
t
6
 
0
ns min
SCLK active edge to data valid delay
3
 
 
60
ns max
VDD = 4.5 V to 5.5 V
 
80
ns max
VDD = 2.7 V to 3.6 V
t7
4
 
10
ns min
Bus relinquish time after CS
 inactive edge
 
80
ns max
 
t
8
 
0
ns min
CS
 rising edge to SCLK edge hold time
t
9
 
0
ns min
CS
 falling edge to DOUT active time
 
60
ns max
VDD = 4.5 V to 5.5 V
 
80
ns max
VDD = 2.7 V to 3.6 V
t10
10
ns min
SCLK inactive edge to DOUT high
 
1
 Sample tested during initial release to ensure compliance. All input signals are specified with tR = tF = 5 ns (10% to 90% of VDD) and timed from a voltage level of 1.6 V.
2
 See Figure 2.
3
 SCLK active edge is falling edge of SCLK.
4
 This means that the times quoted in the timing characteristics are the true bus relinquish times of the part and, as such, are independent of external bus loading
capacitances.
 
CS
SCLK
DIN
DOUT
t
1
1
8
7
MSB
LSB
2
3
MSB
LSB
1
2
7
8
t
2
t
4
t
5
t
3
t
6
t
7
t
8
t
9
t
10
 
Figure 2. Detailed SPI Timing Diagram
1.6V
10pF
TO
OUTPUT
PIN
I
SINK
 (1.6mA WITH V
DD
 = 5V,
100礎 WITH V
DD
 = 3V)
I
SOURCE
 (200礎 WITH V
DD
= 5V,
100礎 WITH V
DD
 = 3V)
 
Figure 3. Load Circuit for Timing Characterization
 
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