AD7760
Rev. A | Page 6 of 36
TIMING SPECIFICATIONS
AVDD1 = DVDD = VDRIVE = 2.5 V, AVDD2 = AVDD3 = AVDD4 = 5 V, TA = 25°C, normal mode, unless otherwise noted.
Table 3.
Parameter
Limit at TMIN, TMAX
Unit
Description
fMCLK
1
MHz min
Applied master clock frequency
40
MHz max
fICLK
500
kHz min
Internal modulator clock derived from MCLK
20
MHz max
0.5 × tICLK
typ
DRDY pulse width
t2
10
ns min
DRDY falling edge to CS falling edge
t3
3
ns min
RD/WR setup time to CS falling edge
t4
(0.5 × tICLK) + 16 ns
max
Data access time
t5
tICLK
min
CS low read pulse width
t6
tICLK
min
CS high pulse width between reads
t7
3
ns min
RD/WR hold time to CS rising edge
t8
11
ns max
Bus relinquish time
t92
0.5 × tICLK
typ
DRDY high period
t102
0.5 × tICLK
typ
DRDY low period
t11
(0.5 × tICLK) + 16 ns
max
Data access time
23
ns min
Data valid prior to DRDY rising edge
19
ns min
Data valid after DRDY rising edge
t14
11
ns max
Bus relinquish time
t15
4 × tICLK
min
CS low write pulse width
t16
4 × tICLK
min
CS high period between address and data
t17
5
ns min
Data setup time
t18
0
ns min
Data hold time
23
ns min
Data valid prior to MCLK falling edge while DRDY is logic low
19
ns min
Data valid after MCLK falling edge while DRDY is logic low
1 tICLK = 1/fICLK.
2 When ICLK = MCLK, DRDY pulse width depends on the mark-space ratio of applied MCLK.
3 Valid when using the modulator output mode with CDIV = 1.
4 See the Modulator Data Output Mode section for timing diagrams.
5 Valid when using the modulator output mode with CDIV = 0.