LTC1291D(RevA) 데이터 시트보기 (PDF) - Linear Technology

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LTC1291D
(Rev.:RevA)

Single Chip 12-Bit Data Acquisition System

Linear Technology 

LTC1291

APPLICATI S I FOR ATIO

A “Quick Look” Circuit for the LTC1291

Users can get a quick look at the function and timing of

the LTC1291 by using the following simple circuit

(Figure 16). DIN is tied to VCC. This requires VIN be

applied to CH1 with respect to the ground plane. The

data is output MSB-first. CS is driven at 1/64, the clock

frequency by the 74HC393 and DOUT outputs the data.

The output data from the DOUT pin can be viewed on a

oscilloscope that is set up to trigger on the falling edge

of CS (Figure 17).

22µF TANTALUM

f/64

CS VCC (VREF)

CH0

CLK

0.1µF f

LTC1291

VIN

CH1

DOUT

GND

DIN

A1

VCC

CLR1

A2

1QA

CLR2

1QB 74HC393 2QA

1QC

2QB

1QD

2QC

GND

2QD

5V

0.1µF

TO OSCILLOSCOPE

CLOCK IN 1MHz

Figure 16. “Quick Look” Circuit for the LTC1291

LTC1291 F16

CLK

CS

DOUT

NULL

BIT

MSB

(B11)

LSB FILLS WITH

(B0)

ZEROES

VERTICAL: 5V/DIV

HORIZONTAL: 5µs/DIV

Figure 17. Scope Trace of the LTC1291 "Quick Look"

Circuit Showing Output 101010101010 (AAAHEX)

Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However,

no responsibility is assumed for its use. Linear Technology Corporation makes no representation that

the interconnection of its circuits as described herein will not infringe on existing patent rights.

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