®

7

VSP2080

FIGURE 5. VSP2080 Typical Application and Bypassing Requirements.

DECOUPLING AND GROUNDING

CONSIDERATIONS

Figure 5 shows the recommended decoupling scheme for

the VSP2080. In most cases, 0.1

µF ceramic chip capacitors

are adequate to keep the impedance low over a wide fre-

quency range. Their effectiveness largely depends on the

proximity to the individual pin. Therefore, they should be

located as close as possible to the pins. In addition, one

larger capacitor (1

µF to 22µF) should be connected from

the VSP2080.

LCM

2.4V

OUT

C

MODE

OB

REFCK

DATCK

DUMC

PD

REF IN

REFB

REFT

V

DDA

AGC IN

GND

A

CCD R

CCD D

GND

A

V

DDA

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

VSP2080

0.1

µF

0.1

µF

0.1

µF

0.1

µF

0.1

µF

0.1

µF

0.1

µF

0.1

µF

0.1

µF

0.1

µF

DSP

ADS900

Analog

Input

Reference Out (1.0V)

0.047

µF

CCD Output

V

DDA

A/D Converter