5th-Order, Lowpass,

Switched-Capacitor Filters

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5

-56

-40

-48

-32

-8

0

-16

-24

8

0

1.0 1.5 2.0 2.5

0.5

3.0 3.5 4.0 4.5 5.0

MAX7409/MAX7413

FREQUENCY RESPONSE

(BESSEL)

INPUT FREQUENCY (kHz)

fC = 1kHz

-70

-50

-60

-40

-10

0

-20

-30

10

0

1.0 1.5 2.0 2.5

0.5

3.0 3.5 4.0 4.5 5.0

MAX7410/MAX7414

FREQUENCY RESPONSE

(BUTTERWORTH)

INPUT FREQUENCY (kHz)

fC = 1kHz

-250

-200

-100

-150

-50

0

0

0.4

0.6

0.2

0.8

1.0

1.2

1.4

1.6

MAX7409/MAX7413

PHASE RESPONSE

(BESSEL)

INPUT FREQUENCY (kHz)

fC = 1kHz

-350

-300

-200

-250

-100

-50

-150

0

0

0.4

0.6

0.2

0.8

1.0

1.2

1.4

1.6

MAX7410/MAX7414

PHASE RESPONSE

(BUTTERWORTH)

INPUT FREQUENCY (kHz)

fC = 1kHz

-3.2

-2.4

-3.0

-2.0

-0.8

-0.4

-1.2

-1.6

0

0

204 306 408 510

102

612 714 816 918 1.02k

MAX7409/MAX7413

PASSBAND FREQUENCY RESPONSE

(BESSEL)

INPUT FREQUENCY (Hz)

fC = 1kHz

-3.5

-2.5

-3.0

-2.0

-0.5

0

-1.0

-1.5

0.5

0

204 306 408 510

102

612 714 816 918 1.02k

MAX7410/MAX7414

PASSBAND FREQUENCY RESPONSE

(BUTTERWORTH)

INPUT FREQUENCY (Hz)

fC = 1kHz

1.11

1.12

1.13

1.14

1.15

1.16

1.17

1.18

1.19

2.5

3.5

3.0

4.0

4.5

5.0

5.5

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

Typical Operating Characteristics

(VDD = +5V for MAX7409/MAX7410, VDD = +3V for MAX7413/MAX7414, fCLK = 100kHz, SHDN = VDD, COM = OS = VDD / 2, TA = +25°C,

unless otherwise noted.)

LABEL

fIN

(Hz)

fC

(kHz)

A

200

1

B

1k

5

fCLK

(kHz)

100

500

MEASUREMENT

BANDWIDTH (kHz)

22

80

Table A. THD+N vs. Input Signal

Amplitude Plot Characteristics