MAX1242 Datasheet, PDF (9/12 Pages) Maxim Integrated Products – +2.7V to %.25V, Low-Power, 10-Bit Serial ADCs in SO-8

+2.7V to +5.25V, Low-Power, 10-Bit
Serial ADCs in SO-8
CS
SCLK
DOUT
INTERFACE IDLE
TRACK/HOLD
STATE TRACK
CYCLE TIME
CONVERSION
IN PROGRESS
HOLD
7.5µs (t_CONV)
1
4
8
12
16
EOC
EOC
0µs
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 S1 S0
CLOCK OUT SERIAL DATA
SUB
BITS
TRACK
12.5 × 0.476µs = 5.95µs
TOTAL = 13.7µs
TRAILING
ZEROS
0µs
IDLE
0.24µs
(t_CS)
HOLD
Figure 8a. Interface Timing Sequence
CS
SCLK
DOUT
INTERFACE IDLE
TRACK/HOLD
STATE TRACK
CYCLE TIME
CONVERSION
IN PROGRESS
HOLD
7.5µs (t_CONV)
1
4
8
EOC
EOC
0µs
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
CLOCK OUT SERIAL DATA
TRACK
10.5 × 0.476µs = 5µs
TOTAL = 12.74µs
IDLE
0.24µs
(t_CS)
Figure 8b. Interface Timing Sequence—Minimum Cycle Time
HOLD
CS
t_CS0
SCLK
t_DV
DOUT
t_AP
INTERNAL
T/H
(TRACK/ACQUIRE)
t_CONV
(HOLD)
…
…
t_DO
…
t_STR
…
t_CH
t_CL
B0
S1
S0
(TRACK/ACQUIRE)
t_CS
t_TR
Figure 9. Detailed Serial-Interface Timing
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