LTC1854 データシートの表示（PDF） - Linear Technology

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LTC1854

8-Channel, ±10V Input 12-/14-/16-Bit, 100ksps ADC Converters with Shutdown

Linear Technology 

LTC1854/LTC1855/LTC1856

PI FU CTIO S

DGND (Pin 24): Digital Ground.

SDI (Pin 25): Serial Data Input.

SCK (Pin 26): Serial Data Clock.

W

FU CTIO AL BLOCK DIAGRA

RD (Pin 27): Read Input. This active low signal enables the

digital output pin SDO and enables the serial interface, SDI

and SCK are ignored when RD is high.

CONVST (Pin 28): Conversion Start. The ADC starts a

conversion on CONVST’s rising edge.

AVDD DVDD

19 20

2

CH0

CH1 3

•

•

•

CH7 9

COM 1

INPUT MUX

MUX ADDRESS

INTERNAL

CLOCK

CONTROL

LOGIC

28 CONVST

25 SDI

22 BUSY

26 SCK

+

12-/14-/16-BIT

SAMPLING ADC

–

DATA OUT

2.5V

REFERENCE

4.096V

SERIAL I/O

27 RD

21

OVDD

23 SDO

8k

MUXOUT– MUXOUT+ ADC+ ADC–

14

AGND1

11 10

12 13

15

VREF

1.6384X

16

REFCOMP

17 18 24

AGND2 AGND3 DGND

18545 BD

10

185456fa

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