LTC2480CDD datasheet(12/40 Pages) LINER

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LTC2480

2480f

SDO

SCK

SDI

SLEEP

tKQMAX

CONVERSION

DATA IN/OUT

tKQMIN

2480 TD1

TI I G DIAGRA S

Timing Diagram Using Internal SCK

APPLICATIO S I FOR ATIO

Timing Diagram Using External SCK

SDO

SCK

SDI

SLEEP

tKQMAX

CONVERSION

DATA IN/OUT

tKQMIN

2480 TD2

CONVERTER OPERATION

Converter Operation Cycle

The LTC2480 is a low power, delta-sigma analog-to-

digital converter with an easy to use 4-wire serial interface

and automatic differential input current cancellation. Its

operation is made up of three states. The converter oper-

ating cycle begins with the conversion, followed by the low

power sleep state and ends with the data output (see

Figure 1). The 4-wire interface consists of serial data

output (SDO), serial clock (SCK), chip select (CS) and

serial data input (SDI).

Initially, the LTC2480 performs a conversion. Once the

conversion is complete, the device enters the sleep state.

CONVERT

SLEEP

DATA OUTPUT

CONFIGURATION INPUT

2480 F01

TRUE

FALSE

CS = LOW

AND

SCK

Figure 1. LTC2480 State Transition Diagram

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