AD5346/AD5347/AD5348
Rev. 0 | Page 5 of 24
TIMING CHARACTERISTICS1, 2, 3
Table 3. VDD = 2.5 V to 5.5 V; all specifications TMIN to TMAX, unless otherwise noted
Parameter
Limit at TMIN, TMAX
Unit
Condition/Comments
t1
0
ns min
CS to WR setup time
t2
0
ns min
CS to WR hold time
t3
20
ns min
WR pulse width
t4
5
ns min
Data, GAIN, BUF setup time
t5
4.5
ns min
Data, GAIN, BUF hold time
t6
5
ns min
Synchronous mode. WR falling to LDAC falling.
t7
5
ns min
Synchronous mode. LDAC falling to WR rising.
t8
4.5
ns min
Synchronous mode. WR rising to LDAC rising.
t9
5
ns min
Asynchronous mode. LDAC rising to WR rising.
t10
4.5
ns min
Asynchronous mode. WR rising to LDAC falling.
t11
20
ns min
LDAC pulse width
t12
10
ns min
CLR pulse width
t13
20
ns min
Time between WR cycles
t14
20
ns min
A0, A1, A2 setup time
t15
0
ns min
A0, A1, A2 hold time
t16
0
ns min
A0, A1, A2 to CS setup time
t17
0
ns min
A0, A1, A2 to CS hold time
t18
0
ns min
CS to falling edge of RD
t19
20
ns min
RD pulse width; VDD = 3.6 V to 5.5 V
30
ns min
RD pulse width; VDD = 2.5 V to 3.6 V
t20
0
ns min
CS to RD hold time
t21
22
ns max
Data access time after falling edge of RD; VDD = 3.6 V to 5.5 V
30
ns max
Data access time after falling edge of RD VDD = 2.5 V to 3.6 V
t22
4
ns min
Bus relinquish time after rising edge of RD
30
ns max
t23
22
ns max
CS falling edge to data; VDD = 3.6 V to 5.5 V
30
ns max
CS falling edge to data; VDD = 2.5 V to 3.6 V
t24
30
ns min
Time between RD cycles
t25
30
ns min
Time from RD to WR
t26
30
ns min
Time from WR to RD, VDD = 3.6 V to 5.5 V
50
ns min
Time from WR to RD, VDD = 2.5 V to 3.6 V
1 Guaranteed by design and characterization, not production tested.
2 All input signals are specified with tr = tf = 5 ns (10% to 90% of VDD) and timed from a voltage level of (VIL + VIH)/2.
CS
WR
DATA,
GAIN, BUF
LDAC1
LDAC2
CLR
NOTES
1. SYNCHRONOUS LDAC UPDATE MODE
2. ASYNCHRONOUS LDAC UPDATE MODE
A0–A2
t1
t2
t3
t4
t7
t9
t10
t11
t12
t5
t15
t8
t14
t6
t13
03331-0-003
CS
A0–A2
RD
WR
DATA
t16
t18
t25
t20
t22
t21
t17
t26
t24
t19
t23
03331-0-004
Figure 3. Parallel Interface Write Timing Diagram
Figure 4. Parallel Interface Read Timing Diagram