LTC2450 datasheet(6/20 Pages) LINER

6 / 20 page

LTC2450

2450fa

pin Functions

VCC (Pin 1): Positive Supply Voltage and Converter Refer-

ence Voltage. Bypass to GND (Pin 3) with a 10µF capacitor

in parallel with a low series inductance 0.1µF capacitor

located as close to the part as possible.

VIN (Pin 2): Analog Input Voltage.

GND (Pin 3): Ground. Connect to a ground plane through

a low impedance connection.

CS(Pin4):ChipSelectActiveLOWDigitalInput.ALOWon

this pin enables the SDO digital output. A HIGH on this pin

places the SDO output pin in a high impedance state.

SDO (Pin 5): Three-State Serial Data Output. SDO is used

for serial data output during the DATA OUTPUT state and

can be used to monitor the conversion status.

SCK(Pin6):SerialClockInput.SCKsynchronizestheserial

data output. While digital data is available (the ADC is not

in CONVERT state) and CS is LOW (ADC is not in SLEEP

state) a new data bit is produced at the SDO output pin

following every falling edge applied to the SCK pin.

Exposed Pad (Pin 7): Ground. The Exposed Pad must be

soldered to the same point as Pin 3.

Functional block DiaGraM

SPI

INTERFACE

16 BIT

A/D

CONVERTER

INTERNAL

OSCILLATOR

REF +

SDO

SCK

GND

VIN

VCC

REF –

2450 BD

Figure 1. Functional Block Diagram

LTC2450 Datasheet(PDF) 6 Page - Linear Technology