Rainbow-electronics MAX7480 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX7480

8th-Order, Lowpass, Butterworth,

Switched-Capacitor Filter

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ELECTRICAL CHARACTERISTICS (continued)

= +5V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, OS = COM, 0.1µF from COM to GND, SHDN =

, f

CLK

= 100kHz, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

CONDITIONS

MIN TYP MAX

SYMBOLPARAMETER

Measured at DC

SHDN = GND, CLK driven from 0 to V

Operating mode, no load, IN = OS = COM

0.5V

SDL

SHDN Input Low

- 0.5V

SDH

SHDN Input High

60PSRRPower-Supply Rejection Ratio

0.2 1I

SHDN

Shutdown Current

2.9 3.5Supply Current I

4.5 5.5V

Supply Voltage

µA

UNITS

SHDN Input Leakage Current V

SHDN

= 0 to V

±0.1 ±10 µA

POWER REQUIREMENTS

SHUTDOWN

FILTER CHARACTERISTICS

= +5V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, SHDN = V

, V

COM =

OS =

CLK

= 100kHz, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

Note 1: The maximum f

is defined as the clock frequency f

CLK

= 100 · f

at which the peak SINAD drops to 68dB with a sinusoidal

input at 0.2f

Note 2: DC insertion gain is defined as ∆V

OUT

/ ∆V

Note 3: OS voltages above V

- 1V saturate the input and result in a 75µA typical input leakage current.

Note 4: f

OSC

(kHz) ≅ 53 · 10

/ C

OSC

(pF).

= 0.5f

-0.1 0.0

= 2f

= f

-3.5 -3.0 -2.5

Insertion Gain Relative to

DC Gain

-48 -43

= 3f

-76 -70

CONDITIONS UNITS

MIN TYP MAX

PARAMETER

1 2 3 4 5 6 7 8

Switched-Capacitor Filter 1

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