(VDD = +5V for MAX7418–MAX7421, VDD = +3V for MAX7422–MAX7425; fCLK = 2.2MHz; SHDN = VDD; VCOM = VOS = VDD / 2;

TA = +25°C; unless otherwise noted.)

Analog Devices │ 7

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MAX7418–MAX7425

5th-Order, Lowpass,

Switched-Capacitor Filters

Typical Operating Characteristics (continued)

-250

-200

-100

-150

-50

0

0

8

4

12

16

20

24

28

MAX7419/MAX7423

PHASE RESPONSE (BESSEL)

INPUT FREQUENCY (kHz)

-90

-70

-80

-40

-50

-60

-10

-20

-30

0

0

2

1

3

4

5

MAX7418

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(ELLIPTIC, R = 1.6)

AMPLITUDE (Vp-p)

SEE TABLE A

D

E

-90

-70

-80

-40

-50

-60

-10

-20

-30

0

0

2

1

3

4

5

MAX7421

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(ELLIPTIC, R = 1.25)

AMPLITUDE (Vp-p)

SEE TABLE A

D

E

-350

-250

-300

-150

-200

-50

-100

0

0

8

12

4

16

20

24

28

MAX7420/MAX7424

PHASE RESPONSE (BUTTERWORTH)

INPUT FREQUENCY (kHz)

-90

-70

-80

-40

-50

-60

-10

-20

-30

0

0

2

1

3

4

5

MAX7419

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(BESSEL)

AMPLITUDE (Vp-p)

SEE TABLE A

D

E

-90

-70

-80

-40

-50

-60

-10

-20

-30

0

0

1.0

0.5

1.5

2.0

2.5

3.0

MAX7422

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(ELLIPTIC, R = 1.6)

AMPLITUDE (Vp-p)

B

A

C

SEE TABLE A

-450

-350

-400

-200

-250

-300

-50

-100

-150

0

0

8

12

4

16

20

24

28

MAX7424/MAX7425

PHASE RESPONSE (ELLIPTIC, R = 1.25)

INPUT FREQUENCY (kHz)

-90

-70

-80

-40

-50

-60

-10

-20

-30

0

0

2

1

3

4

5

MAX7420

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(BUTTERWORTH)

AMPLITUDE (Vp-p)

SEE TABLE A

D

E

-90

-70

-80

-40

-50

-60

-10

-20

-30

0

0

1.0

0.5

1.5

2.0

2.5

3.0

MAX7423

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(BESSEL)

AMPLITUDE (Vp-p)

A

C

B

SEE TABLE A