LTM2893/LTM2893-1

29

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For more information www.linear.com/LTM2893

TYPICAL APPLICATIONS

Figure 19. LTM2893-1 with SoftSpan™ Configurable LTC2348-18 8-Channel Simultaneous Sampling ADC

4.7k

0.1µF

0.1µF

0.1µF

47µF

0.1µF

0.1µF

0.1µF

ON2

CNV2

SS2

SCK2

MOSI2

MISOA2

SA2

GND2

ON

CSC

SCK

MOSI

MISOA

SA

SB

SC

GND

CNV

BUSY

FAULT

SS

ON

PD

CS2

SCK

MOSI

CNV

BUSYMON

FLTINT

CS

MISOA

GND

5Vi

3.3V

LTM2893-1

FPGA

BUSY2

BUSYS

MISOB2

MISOB

IN0+

IN0–

5Vi

REFIN

GND

CS

SDO0

SCK

BUSY

CNV

LTC2348-18

SDI

SDO4

PD

CMOS

IN7+

IN7–

REFBUF

–15Vi

15Vi

MISOB

LTM2893-1 AND LTC2348-18 MAXIMUM SAMPLING RATE 166ksps

CONFIGURATION REGISTER COMMANDS 0x00h, 0x9Eh (WORDCOUNT = 4 , WORDLENGTH = 24)

FIGURE 3 SHOWS THE EXPECTED TRANSACTIONS THAT OCCUR FOR WORDCOUNT = 4

CSC

SS

MOSI

0x00h

0x9Eh

SS

CNV

6µs

BUSY

MISOA

MISOB

CH [0, 1, 2, 3]

CH [4, 5, 6, 7]

96 BITS

SS

SoftSpan SELECTS (24 BITS) BEFORE OR DURING CONVERSIONS

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