LTC1289 Linear Technology, LTC1289 Datasheet - Page 23

• Manufacturer Part Number: LTC1289
• Description: 3 Volt Single Chip 12-Bit Data Acquisition System
• Manufacturer: Linear Technology

A “Quick Look” Circuit for the LTC1289
Users can get a quick look at the function and timing of the
LTC1289 by using the following simple circuit. REF
D
single-ended input, unipolar mode, MSB-first format and
16-bit word length. ACLK is driven by an external clock and
TYPICAL
IN
are tied to V
A
PPLICATI
CC
selecting a 3V input span, CH7 as a
V
IN
CHO
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
O
DEGLITCHER
LTC1289
U
SCLK
ACLK
22 F
TIME
D
CS
OUT
S
AGND
Showing A/D Output of 010101010101 (555
ACLK
SCLK
D
REF
REF
Scope Trace of LTC1289 “Quick Look” Circuit
V
OUT
D
CS
V
CC
IN
+
–
–
A “Quick Look” Circuit for the LTC1289
(B11)
OSCILLOSCOPE
MSB
f/2
TO
+
VERTICAL: 5V/DIV
HORIZONTAL: 2 s/DIV
f
and
f/128
SCLK is driven by one half the clock rate. CS is driven at
1/128 the clock rate by the 74HC393 and D
data. All other pins are tied to a ground plane. The output
data from the D
which is set up to trigger on the falling edge of CS.
LSB
(B0)
CLOCK IN
2MHz MAX
A1
CLR1
1QA
1QB
1QC
1QD
GND
74HC393
ZEROES
FILLS
CLR2
2QA
2QB
2QC
2QD
V
A2
CC
HEX
OUT
)
pin can be viewed on an oscilloscope
LTC1289 TA02
0.1 F
3.0V
LTC1289
OUT
outputs the
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