LTC1290 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1290' PDF : 28 Pages View PDF
LTC1290
TYPICAL APPLICATI S
A “Quick Look” Circuit for the LTC1290
A “Quick Look” Circuit for the LTC1290
Users can get a quick look at the function and timing of the
LTC1290 by using the following simple circuit. REF+ and
22µF LTC1290
5V
f/128
DIN are tied to VCC selecting a 5V input span, CH7 as a
single-ended input, unipolar mode, MSB-first format and
16-bit word length. ACLK and SCLK are tied together and
driven by an external clock. CS is driven at 1/128 the clock
rate by the CD4520 and DOUT outputs the data. All other
CHO
VCC
CH1
ACLK
CLK
VDD
f
CH2
SCLK
EN
RESET
CH3
DIN
CH4
DOUT
CH5
CS
Q1
Q4
Q2 CD4520 Q3
Q3
Q2
0.1µF
pins are tied to a ground plane. The output data from the
CH6
REF+
Q4
Q1
DOUT pin can be viewed on an oscilloscope which is set up VIN
to trigger on the falling edge of CS.
CH7
COM
DGND
REF–
V–
AGND
RESET
EN
VSS
CLK
CLOCK IN
2MHz MAX
1290 TA02
TO
OSCILLOSCOPE
Scope Trace of LTC1290 “Quick Look” Circuit
Showing A/D Output of 010101010101 (555HEX)
CS
ACLK/
SCLK
DOUT
DEGLITCHER
TIME
MSB
LSB
(B11)
(B0)
VERTICAL: 5V/DIV
HORIZONTAL: 1µs/DIV
FILLS
ZEROS
1290fe
26
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