7809LP datasheet(7/23 Pages) MAXWELL

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16-Bit Latchup Protected Analog to Digital Converter

7809LP

01.11.05 Rev 7

TABLE 12. 7809LP CONTROL LINE FUNCTIONS FOR READ AND CONVERT

SPECIFIC FUNCTION

R/C

BUSY

EXT/INT

DATACL

PWRD

SB/BTC

OPERATION

Initiate Conver-

sion and Output

Data using Inter-

nal Clock

1 > 0

Output

Initiates conversion “n”.

Data from conversion “n-

1” clocked out on DATA

synchronized to 16 clock

pulses output on DATA-

CLK

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 > 1

Input

Initiates conversion “n”

Outputs a pulse on SYNC

followed by data from con-

version “n” clocked out

synchronized to external

DATACLK.

Outputs a pules on SYNC

followed by data from con-

version “n-1” clocked out

synchronized to external

DATACLK 1. Conversion

“n” in process.

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 > 1

CS or R/C must be HIGH

or a new conversion will

be initiated without time

for acquisition

Power Down

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

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