LTC2400CS8 datasheet(9/40 Pages) LINER

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LTC2400

FU CTIO AL BLOCK DIAGRA

TEST CIRCUITS

Figure 1. LTC2400 State Transition Diagram

APPLICATIONS INFORMATION

AUTOCALIBRATION

AND CONTROL

DAC

DECIMATING FIR

INTERNAL

OSCILLATOR

SERIAL

INTERFACE

ADC

∑

∫

GND

VCC

VIN

SDO

SCK

VREF

(INT/EXT)

2400 FD

3.4k

SDO

2400 TA03

HI-Z TO VOH

VOL TO VOH

VOH TO HI-Z

CLOAD = 20pF

3.4k

SDO

2400 TA04

HI-Z TO VOL

VOH TO VOL

VOL TO HI-Z

CLOAD = 20pF

VCC

Converter Operation Cycle

The LTC2400 is a low power, delta-sigma analog-to-

digital converter with an easy to use 3-wire serial interface.

Its operation is simple and made up of three states. The

converter operating cycle begins with the conversion,

followed by a low power sleep state and concluded with

the data output (see Figure 1). The 3-wire interface con-

sists of serial data output (SDO), a serial clock (SCK) and

a chip select (CS).

Initially, the LTC2400 performs a conversion. Once the

conversion is complete, the device enters the sleep state.

While in this sleep state, power consumption is reduced by

CONVERT

SLEEP

DATA OUTPUT

2400 F01

CS AND

SCK

LTC2400CS8 数据表(PDF) 9 Page - Linear Technology

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