LTC1090CSW datasheet(14/28 Pages) LINER

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LTC1090

1090fc

4. CS Low During Conversion

In the normal mode of operation, CS is brought high

during the conversion time (see Figure 3). The serial port

ignores any SCLK activity while CS is high. The LTC1090

will also operate with CS low during the conversion. In this

mode, SCLK must remain low during the conversion as

shown in Figure 4. After the conversion is complete, the

DOUT line will become active with the first output bit. Then

the data transfer can begin as normal.

5. Microprocessor Interfaces

The LTC1090 can interface directly (without external hard-

ware) to most popular microprocessor (MPU) synchronous

Figure 3. CS High During Conversion

Figure 4. CS Low During Conversion

APPLICATIO S I FOR ATIO

LTC1090 • AI09

SHIFT RESULT OUT

AND NEW ADDRESS IN

ODD/

SIGN

SGL/

DIFF

SEL

DOUT

SCLK

SEL

UNI MSBF WL1 WL0

ODD/

SIGN

SGL/

DIFF

SEL

UNI MSBF WL1 WL0

tSMPL

SAMPLE

ANALOG

INPUT

40 TO 44 ACLK CYCLES

SHIFT

MUX

ADDRESS

DIN

DON’T CARE

LTC1090 • AI10

SHIFT RESULT OUT

AND NEW ADDRESS IN

ODD/

SIGN

SGL/

DIFF

SEL

SCLK

DOUT

SEL

UNI MSBF WL1 WL0

ODD/

SIGN

SGL/

DIFF

SEL

UNI MSBF WL1 WL0

tSMPL

SAMPLE

ANALOG

INPUT

40 TO 44 ACLK CYCLES

SCLK MUST REMAIN LOW

SHIFT

MUX

ADDRESS

DIN

DON’T CARE

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