Dual Universal Switched-Capacitor Filters

______________________________________________________________________________________

17

NB/HPB

INVB

INVA

VIN

VDD

fCLK = 1MHz

NA/HPA

OUT

R1B

200k

R3B

200k

R2B

10k

R3A

200k

R2A

10k

R1

200k

LPA

BPA

LPB

BPB

C1

0.1

μF

C2

0.1

μF

SHDN

VDD

GND

SA

SB

COM

EXTCLK

CLK

MAX7490

MAX7491

4TH-ORDER 10kHz

BANDPASS FILTER

-40

-30

-25

-20

-15

-10

-5

0

5

8

9

10

11

12

4TH-ORDER 10kHz BANDPASS FILTER

FREQUENCY RESPONSE

FREQUENCY (kHz)

-35

Typical Application Circuit

Package Information

For the latest package outline information and land patterns, go

to www.maxim-ic.com/packages.

PACKAGE TYPE

PACKAGE CODE

DOCUMENT NO.

16 QSOP

E16+4

21-0055