AD5532
Rev. D | Page 7 of 20
SERIAL INTERFACE
Table 4.
Limit at TMIN, TMAX (A Version)
Unit
Conditions/Comments
14
MHz max
SCLK frequency
t1
28
ns min
SCLK high pulse width
t2
28
ns min
SCLK low pulse width
SYNC falling edge to SCLK falling edge setup time
t3
15
ns min
SYNC low time
t4
50
ns min
t5
10
ns min
DIN setup time
t6
5
ns min
DIN hold time
SYNC falling edge to SCLK rising edge setup time for read back
t7
5
ns min
20
ns max
SCLK rising edge to DOUT valid
60
ns max
SCLK falling edge to DOUT high impedance
10th SCLK falling edge to SYNC falling edge for read back
t10
400
ns min
24th SCLK falling edge to SYNC falling edge for DAC mode write
t11
400
ns min
SCLK falling edge to SYNC falling edge setup time for read back
7
ns min
00939-C-004
t1
t3
t2
MSB
LSB
SCLK
123456789
10
SYNC
DIN
t4
t5
t6
Figure 4. 10-Bit Write (ISHA Mode and Both Readback Modes)
00939-C-005
SCLK
12345
21
22
23
24
1
DIN
SYNC
t1
t3
t2
t4
t5
t6
LSB
MSB
t11
Figure 5. 24-Bit Write (DAC Mode)
00939-C-006
SCLK
10
12
34567
89
10
11
12
13
14
MSB
LSB
DOUT
SYNC
t7
t1
t2
t12
t4
t8
t10
t9
Figure 6. 14-Bit Read (Both Readback Modes)
2 Guaranteed by design and characterization, not production tested.
3 In ISHA mode the maximum SCLK frequency is 20 MHz and the minimum pulse width is 20 ns.
4 These numbers are measured with the load circuit of Figure 3. 5
SYNC should be taken low while SCLK is low for read back.