LTC2379-18
TIMING DIAGRAMS
Normal Mode, Single Device
Figure 13 shows a single LTC2379-18 operated in normal
mode with CHAꢁI and RDL/SDꢁ tied to ground. With RDL/
SDꢁ grounded, SDO is enabled and the MSꢀ(D17) of the
new conversion data is available at the falling edge of
ꢀUSY. ThisisthesimplestwaytooperatetheLTC2379-18.
When CHAꢁI = 0, the LTC2379-18 operates in normal
mode. ꢁn normal mode, RDL/SDꢁ enables or disables the
serial data output pin SDO. ꢁf RDL/SDꢁ is high, SDO is in
high impedance. ꢁf RDL/SDꢁ is low, SDO is driven.
COIVERT
DꢁGꢁTAL HOST
ꢁRQ
CIV
CHAꢁI
ꢀUSY
LTC2379-18
SCK
RDL/SDꢁ
SDO
DATA ꢁI
CLK
238018 F13a
POWER-DOWI
AID ACQUꢁRE
COIVERT
POWER-DOWI AID ACQUꢁRE
COIVERT
CHAꢁI = 0
RDL/SDꢁ = 0
t
CYC
t
CIVH
t
CIVL
CIV
t
= t
– t
– t
ACQ CYC COIV ꢀUSYLH
t
t
COIV
ACQ
ꢀUSY
t
SCK
t
ꢀUSYLH
t
t
QUꢁET
SCKH
1
2
3
16
17
18
SCK
SDO
t
t
SCKL
HSDO
t
t
DSDO
DSDOꢀUSYL
D17
D16
D15
D1
D0
237918 F13
Figure 13. Using a Single ꢀTC2379-18 in Normal Mode
237918fa
16
Linear Systems [ Linear Systems ]
