16-Bit Latchup Protected Analog to Digital Converter
7809LP
TABLE 12. 7809LP CONTROL LINE FUNCTIONS FOR READ AND CONVERT
DATACL
SPECIFIC FUNCTION
CS
R/C
BUSY EXT/INT
PWRD SB/BTC OPERATION
K
Initiate Conver-
sion and Output
Data using Inter-
nal Clock
1 > 0
0
1
0
Output
0
x
Initiates conversion “n”.
Data from conversion “n-
1” clocked out on DATA
synchronized to 16 clock
pulses output on DATA-
CLK
0
1 > 0
1
0
Output
0
x
Initiates conversion “n”.
Data from conversion “n-
1” clocked out on DATA
synchronized to 16 clock
pulses output on DATA-
CLK
Initiate Conver-
sion and Output
Data using Exter-
nal Clock
1 > 0
0
0
1 > 0
1
1
1
1
1
1
1
Input
Input
Input
0
0
x
x
x
x
Initiates conversion “n”
Initiates conversion “n”
1 > 0
Outputs a pulse on SYNC
followed by data from con-
version “n” clocked out
synchronized to external
DATACLK.
1 > 0
1
0
0
1
1
Input
Input
0
0
x
x
Outputs a pules on SYNC
followed by data from con-
version “n-1” clocked out
synchronized to external
DATACLK 1. Conversion
“n” in process.
0
0 > 1
Outputs a pulse on SYNC
followed by data from con-
version “n-1” clocked out
synchronized to external
DATACLK 1. Conversion
“n” in process.
Incorrect Conver-
sions
0
0
0 >1
x
x
0
x
CS or R/C must be HIGH
or a new conversion will
be initiated without time
for acquisition
Power Down
x
x
x
x
x
x
x
x
x
x
0
1
x
x
Analog circuitry powered.
Conversion will be initi-
ated without time for
acquisition
Analog circuitry disabled.
Data from previous con-
version maintained in out-
put registers
01.11.05 Rev 7
All data sheets are subject to change without notice
7
©2005 Maxwell Technologies
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MAXWELL [ MAXWELL TECHNOLOGIES ]
