MAX7400 Просмотр технического описания (PDF) - Maxim Integrated

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MAX7400

8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters

Maxim Integrated 

8th-Order, Lowpass, Elliptic,

Switched-Capacitor Filters

ELECTRICAL CHARACTERISTICS—MAX7404/MAX7407 (continued)

(VDD = +3V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, SHDN = VDD, OS = COM, 0.1µF from COM to GND,

fCLK = 100kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

CLOCK

Internal Oscillator Frequency

Clock Input Current

Clock Input High

Clock Input Low

POWER REQUIREMENTS

Supply Voltage

Supply Current

Shutdown Current

Power-Supply Rejection Ratio

SHUTDOWN

SHDN Input High

SHDN Input Low

SHDN Input Leakage Current

SYMBOL

CONDITIONS

fOSC

ICLK

VIH

VIL

COSC = 1000pF (Note 4)

VCLK = 0 or 3V

VDD

IDD

I SHDN

PSRR

Operating mode, no load, IN = OS = COM

SHDN = GND, CLK driven from 0 to VDD

Measured at DC

VSDH

VSDL

V S HDN = 0 to VDD

MIN TYP MAX UNITS

26

34

43

kHz

±15

±30

µA

VDD - 0.5

V

0.5

V

2.7

3.6

V

2

3.5

mA

0.2

1

µA

60

dB

VDD - 0.5

V

0.5

V

±0.1 ±10

µA

ELLIPTIC (r = 1.5) FILTER CHARACTERISTICS—MAX7400/MAX7404

(VDD = +5V for MAX7400, VDD = +3V for MAX7404; filter output measured at OUT; 10kΩ || 50pF load to GND at OUT; SHDN = VDD;

VCOM = VOS = VDD / 2; fCLK = 100kHz; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Insertion Gain Relative to DC Gain

(Note 5)

fIN = 0.371fC

fIN = 0.587fC

fIN = 0.737fC

fIN = 0.868fC

fIN = 0.940fC

fIN = 0.988fC

fIN = 1.000fC

fIN = 1.500fC

fIN = 1.601fC

fIN = 2.020fC

fIN = 4.020fC

-0.20 -0.10 0.20

-0.20 0.02 0.20

-0.20 -0.08 0.20

-0.20 0.06 0.20

-0.20 -0.03 0.20

-0.20 0.09 0.25

dB

-0.20 0.02 0.25

-82

-75

-84

-78

-83

-78

-85

-78

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