Datasheet

LTC2172-12/
LTC2171-12/LTC2170-12
8
21721012fb
TiMing DiagraMs
2-Lane Output Mode, 16-Bit Serialization
2-Lane Output Mode, 14-Bit Serialization
217212 TD01
t
AP
N + 1
N
ANALOG
INPUT
ENC
–
DCO
–
FR
–
ENC
+
DCO
+
FR
+
OUT#A
+
SAMPLE N-6 SAMPLE N-5
OUT#A
–
OUT#B
+
OUT#B
–
SAMPLE N-4
t
FRAME
t
DATA
t
SER
t
SER
t
PD
D3 D1 D
X
* 0 D11 D9 D7 D5 D3 D1 D
X
* 0 D11 D9 D7
D2 D0 D
Y
* 0 D10 D8 D6 D4 D2 D0 D
Y
* 0 D10 D8 D6
t
ENCH
t
ENCL
t
SER
*D
X
AND D
Y
ARE EXTRA NON-DATA BITS FOR COMPLETE SOFTWARE COMPATIBILITY WITH THE 14-BIT
VERSIONS OF THESE A/Ds. DURING NORMAL NON-OVERRANGED OPERATION D
X
AND D
Y
ARE SET TO
LOGIC 0. SEE THE DATA FORMAT SECTION FOR MORE DETAILS.
217212 TD02
t
AP
N + 2
N + 1
N
ANALOG
INPUT
ENC
–
DCO
–
FR
–
ENC
+
DCO
+
FR
+
OUT#A
+
NOTE THAT IN THIS MODE, FR
+
/FR
–
HAS TWO TIMES THE PERIOD OF ENC
+
/ENC
–
SAMPLE N-6 SAMPLE N-5
OUT#A
–
OUT#B
+
OUT#B
–
SAMPLE N-3SAMPLE N-4
t
FRAME
t
DATA
t
SER
t
SER
t
PD
D5 D3 D1 D
X
* D11 D9 D7 D5 D3 D1 D
X
* D11 D9 D7 D5 D3 D1 D
X
* D11 D9 D7
D4 D2 D0 D
Y
* D10 D8 D6 D4 D2 D0 D
Y
* D10 D8 D6 D4 D2 D0 D
Y
* D10 D8 D6
t
ENCH
t
ENCL
t
SER
*D
X
AND D
Y
ARE EXTRA NON-DATA BITS FOR COMPLETE SOFTWARE COMPATIBILITY WITH THE 14-BIT
VERSIONS OF THESE A/Ds. DURING NORMAL NON-OVERRANGED OPERATION D
X
AND D
Y
ARE SET TO
LOGIC 0. SEE THE DATA FORMAT SECTION FOR MORE DETAILS.