
9
LTC1402
TI I G DIAGRA S
U
W
Nap Mode and Sleep Mode Waveforms
SCK to DOUT Delay
SCK
CONV
NAP
SLEEP
VREF
t1
t12
t11
t1
REFRDY
NOTE: NAP AND SLEEP ARE INTERNAL SIGNALS. REFRDY APPEARS AS A BIT IN THE DOUT WORD.
1402 TD02
t8
t10
SCK
DOUT
1402 TD03
VIH
VOH
VOL
t9
SCK
DOUT
VIH
90%
10%
SCK
CONV
INTERNAL
S/H STATUS
DOUT
t7
t3
12
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
t2
t6
t8a
t4
t5
t8
t0
SAMPLE
HOLD
Hi-Z
tCONV
REFRDY BIT + 12-BIT DATA WORD
DOUT REPRESENTS THE ANALOG INPUT FROM THE PREVIOUS CONVERSION
tTHROUGHPUT
1402 TD01
REF
D11
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
D10
REF