LTC1291 Linear Technology, LTC1291 Datasheet - Page 6

• Manufacturer Part Number: LTC1291
• Description: Single Chip 12-Bit Data Acquisition System
• Manufacturer: Linear Technology

LTC1291
6
BLOCK
TEST CIRCUITS
5V
On and Off Channel Leakage Current
I D AGRA
V
CC
(V
POLARITY
Load Circuit for t
D
REF
CH0
OUT
CH1
D
IN
)
8
2
3
5
GND
I
I
ON
OFF
A
A
INPUT MUX
W
4
REGISTER
ANALOG
1.4V
INPUT
SHIFT
3k
100pF
dDO
, t
r
and t
ON CHANNEL
OFF CHANNEL
TEST POINT
1291 TC02
f
SAMPLE
HOLD
AND
1291 TC01
COMP
CAPACITIVE
WAVEFORM 2
WAVEFORM 1
(SEE NOTE 2)
1291 TC06
(SEE NOTE 1)
12-BIT
DAC
D
D
OUT
OUT
CS
D
OUT
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.
TEST POINT
Voltage Waveforms for t
Load Circuit for t
100pF
3k
REGISTER
CONTROL
OUTPUT
TIMING
12-BIT
SHIFT
AND
SAR
dis
and t
1291 BD
7
6
1
t
dis
5V t
t
dis
dis
en
CLK
D
CS
dis
WAVEFORM 1
OUT
WAVEFORM 2, t
2.0V
1291 TC05
10%
90%
en