LTC1287 LINER [Linear Technology], LTC1287 Datasheet - Page 6

• Manufacturer Part Number: LTC1287
• Description: 3V Single Chip 12-Bit Data Acquisition System
• Manufacturer: LINER [Linear Technology]

LTC1287
BLOCK
6
TEST CIRCUITS
3V
D
OUT
I D AGRA
On and Off Channel Leakage Current
TEST POINT
POLARITY
Load Circuit for t
D
Load Circuit for t
OUT
V
+IN
–IN
CC
100pF
3k
8
2
3
GND
I
I
ON
OFF
A
A
INPUT MUX
4
REGISTER
W
ANALOG
1.5V
INPUT
SHIFT
3k
100pF
dDO
dis
, t
and t
r
and t
ON CHANNEL
OFF CHANNEL
3V t
t
dis
TEST POINT
en
LTC1287 TC02
dis
WAVEFORM 1
f
SAMPLE
WAVEFORM 2, t
HOLD
AND
LTC1287 TC1
LTC1287 TC05
en
COMP
WAVEFORM 2
WAVEFORM 1
CAPACITIVE
(SEE NOTE 2)
LTC1287 TC06
(SEE NOTE 1)
12-BIT
DAC
D
D
OUT
CLK
OUT
Voltage Waveforms for D
D
D
OUT
OUT
CS
Voltage Waveforms for D
V
REF
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.
t
r
5
Voltage Waveforms for t
0.45V
t
dDO
REGISTER
OUTPUT
CONTROL
TIMING
12-BIT
SHIFT
SAR
AND
OUT
OUT
Rise and Fall Times, t
Delay Time, t
6
7
1
t
LTC1287 BD
dis
CLK
D
CS
dis
OUT
t
f
2.1V
dDO
LTC1287 TC03
2.1V
10%
0.6V
LTC1287 TC04
90%
r
, t
2.1V
0.6V
f