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LTC1287 Datasheet(PDF) 6 Page - Linear Technology

Part No. LTC1287
Description  3V Single Chip 12-Bit Data Acquisition System
Download  16 Pages
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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 6 page
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6
LTC1287
Load Circuit for tdis and ten
Load Circuit for tdDO, tr and tf
On and Off Channel Leakage Current
Voltage Waveforms for DOUT Delay Time, tdDO
Voltage Waveforms for DOUT Rise and Fall Times, tr, tf
Voltage Waveforms for tdis
3V
A
A
IOFF
ION
POLARITY
OFF CHANNEL
ON CHANNEL
LTC1287 TC1
I
DAGRA
BLOCK
TEST CIRCUITS
CLK
DOUT
0.45V
tdDO
0.6V
2.1V
LTC1287 TC03
DOUT
0.6V
2.1V
tr
tf
LTC1287 TC04
DOUT
3k
100pF
TEST POINT
3V tdis WAVEFORM 2, ten
tdis WAVEFORM 1
LTC1287 TC05
INPUT
SHIFT
REGISTER
COMP
SAMPLE
AND
HOLD
12-BIT
CAPACITIVE
DAC
OUTPUT
SHIFT
REGISTER
12-BIT
SAR
CONTROL
AND
TIMING
VCC
8
ANALOG
INPUT MUX
2
3
VREF
5
GND
4
–IN
+IN
DOUT
6
1
CLK
7
CS
LTC1287 BD
DOUT
WAVEFORM 1
(SEE NOTE 1)
2.1V
tdis
90%
10%
DOUT
WAVEFORM 2
(SEE NOTE 2)
CS
NOTE 1: WAVEFORM 1 IS FOR AN OUTPUT WITH INTERNAL CONDITIONS SUCH
THAT THE OUTPUT IS HIGH UNLESS DISABLED BY THE OUTPUT CONTROL.
NOTE 2: WAVEFORM 2 IS FOR AN OUTPUT WITH INTERNAL CONDITIONS SUCH
THAT THE OUTPUT IS LOW UNLESS DISABLED BY THE OUTPUT CONTROL.
LTC1287 TC06
DOUT
1.5V
3k
100pF
TEST POINT
LTC1287 TC02




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