19

LTC2609/LTC2619/LTC2629

26091929f

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

TYPICAL APPLICATIO

REFA

REFB

REFC

REFD

REFA

REFB

REFC

REFD

GND

GND

E10

E11

E2

E3

E4

E5

E6

E7

E8

E9

4

3

5

6

13

12

14

15

11

10

7

CA0

CA1

CA2

SDA

SCL

9

8

REFLO

GND

LTC2609CGN

16

C1

0.1

µF

JP1 REFLO

EXT

GND

1

REFLO

2

EXT REFLO

20-BIT

ADC

8-CHANNEL

MUX

CH0

CH1

CH2

CH3

CH4

CH5

CH6

CH7

ZSSET

CSADC

CSMUX

SCK

CLK

DIN

SD0

23

20

25

19

21

24

CS

SCK

MOSI

MISO

9

10

11

12

13

14

15

17

5

+

–

MUXOUT ADCIN

FSSET

LTC2428CG

74

3

R8

22

Ω

C3

100pF

C7

1

µF

6.3V

C4

0.1

µF

R5

7.5k

R6

7.5k

R7

7.5k

SPI

BUS

GND

616

18

22

27

28

26

2609 TA02

1

GND GND GND GND GND GND

F0

2

8

C5

0.1

µF

DISABLE

ADC

JP2

ON/OFF

A

B

C

5

3

1

6

4

2

A

B

C

5

3

1

6

4

2

A

B

C

5

3

1

6

4

2

A

B

C

5

3

1

6

4

2

A

ADC REF

JP7

REFA

JP3

REFB

JP4

REFC

JP5

REFD

JP6

B

C

5

3

1

6

4

2

NC

C6

0.1

µF

5

6

6

6

12

4

3

NC

GND GND

LT1790ACS6-5

C9

1

µF

6.3V

NC

C8

0.1

µF

5

12

4

3

NC

GND GND

LT1790ACS6-4.096

C11

1

µF

6.3V

NC

C10

0.1

µF

5

12

4

3

NC

GND GND

LT1790ACS6-2.048

Demo Board Schematic—Onboard 20-Bit ADC Measures Key Performance Parameters