DG201A_MIL/202_MIL

Vishay Siliconix

www.vishay.com

S FaxBack 408-970-5600

4-8

Document Number: 70036

S-00405—Rev. G, 21-Feb-00

APPLICATIONS

FIGURE 7. Active Low Pass Filter with Digitally Selected Break Frequency

FIGURE 8. A Precision Amplifier with Digitally Programable Input and Gains

TTL

Control

150 pF

1500 pF

+15 V

DG201A_MIL

GND

30 pF

LM101A

+15 V

–15 V

1

10

100

1 k

10 k

100 k

1 M

–40

0

160

120

80

Select

Select

Select

Select

V–

= 100 (40 dB)

1

1

Max Attenuation =

10 k

W

[–47 dB

0.015

mF

0.15

mF

–15 V

–

+

40

f – Frequency (Hz)

Gain =

Gain 1 (x1)

Gain 2 (x10)

Gain 3 (x100)

Gain 4 (x1000)

–15 V

+15 V

–15 V

GND

DG419

30 pF

+15 V

+15 V

–15 V

DG202_MIL

Logic High = Switch On

+

–

LM101A

CH

18 k

W

9.9 k

W

100 k

W

100

W

100

W

2 k

W

V+

V–

GND

V–

+5 V