Rainbow-electronics MAX7425 Instrukcja Użytkownika Pobierz pdf (Strona 7)

____________________________Typical Operating Characteristics (continued)

= +5V for MAX7418–MAX7421, V

= +3V for MAX7422–MAX7425, f

CLK

= 2.2MHz, SHDN = V

, V

COM

= V

/ 2,

= +25°C, unless otherwise noted.

MAX7418–MAX7425

5th-Order, Lowpass,

Switched-Capacitor Filters

_______________________________________________________________________________________ 7

-90

-70

-80

-40

-50

-60

-10

-20

-30

021 345

MAX

741

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(ELLIPTIC, r = 1.6)

MAX7418 toc13

AMPLITUDE (Vp-p)

THD

(dB)

SEE TABLE A

-90

-70

-80

-40

-50

-60

-10

-20

-30

021 345

MAX7421

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(ELLIPTIC, r = 1.25)

MAX7418 toc16

AMPLITUDE (Vp-p)

THD + N (dB)

SEE TABLE A

-90

-70

-80

-40

-50

-60

-10

-20

-30

021 345

MAX7419

THD + NOISE vs. INPUT SIGNAL AMPLITUD

(BESSEL)

MAX7418 toc14

AMPLITUDE (Vp-p)

THD + N (dB)

SEE TABLE A

-90

-70

-80

-40

-50

-60

-10

-20

-30

021 345

MAX7420

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(BUTTERWORTH)

MAX7418 toc15

AMPLITUDE (Vp-p)

THD + N (dB)

SEE TABLE A

-90

-70

-80

-40

-50

-60

-10

-20

-30

0 1.00.5 1.5 2.0 2.5 3.0

MAX7422

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(ELLIPTIC, r = 1.6)

MAX7418 toc17

AMPLITUDE (Vp-p)

THD + N (dB)

SEE TABLE A

-90

-70

-80

-40

-50

-60

-10

-20

-30

01.00.5 1.5 2.0 2.5 3.0

MAX7423

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(BESSEL)

MAX7418 toc18

AMPLITUDE (Vp-p)

THD + N (dB)

SEE TABLE A

-90

-70

-80

-40

-50

-60

-30

-20

-10

0 0.5 1.0 1.5 2.0 2.5 3.0

MAX7424

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(BUTTERWORTH)

MAX7418 toc19

AMPLITUDE (Vp-p)

THD + N (dB)

SEE TABLE A

-90

-70

-80

-40

-50

-60

-30

-20

-10

0 0.5 1.0 1.5 2.0 2.5 3.0

MAX7425

THD + NOISE vs. INPUT SIGNAL AMPLITUDE

(ELLIPTIC, r = 1.25)

MAX7418 toc20

AMPLITUDE (Vp-p)

THD + N (dB)

SEE TABLE A

2000

1000

4000

3000

6000

5000

7000

INTERNAL OSCILLATOR FREQUENCY

vs. SMALL CAPACITANCE (pF)

MAX7418 toc21

CAPACITANCE ( pF)

OSCILLATOR FREQUENCY (kHz)

1 10 100 1000 10000

ELLIPTIC

BESSEL/BUTTERWORTH

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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