5th-Order, Lowpass,

Switched-Capacitor Filters

4

_______________________________________________________________________________________

COSC = 1000pF (Note 3)

CONDITIONS

21

30

38

fOSC

Internal Oscillator Frequency

MIN

TYP

MAX

SYMBOL

PARAMETER

IN = COM (Note 4)

SHDN = GND

Operating mode, no load

VCLK = 0 or 3V

0.5

VSDL

SHDN Input Low

2.5

VSDH

SHDN Input High

70

PSRR

Power-Supply Rejection Ratio

0.2

1

ISHDN

Shutdown Current

1.2

1.5

2.7

3.6

VDD

Supply Voltage

0.5

VIL

Clock Input Low

2.5

VIH

Clock Input High

±13.5

±20

ICLK

Clock Output Current

(Internal Oscillator Mode)

V

V

dB

µA

V

V

V

µA

kHz

UNITS

SHDN Input Leakage Current

V SHDN= 0 to VDD

0.2

±10

µA

FILTER CHARACTERISTICS

(VDD = +5V for MAX7409/MAX7410, VDD = +3V for MAX7413/MAX7414, filter output measured at OUT, 10kΩ || 50pF load to GND at

OUT, SHDN = VDD, fCLK = 100kHz, TA = TMIN to TMAX, unless otherwise noted.)

Note 1: The maximum fC is defined as the clock frequency fCLK = 100 x fC at which the peak S / (THD+N) drops to 68dB with a

sinusoidal input at 0.2fC.

Note 2: DC insertion gain is defined as

∆VOUT / ∆VIN.

Note 3: fOSC (kHz) ≅ 30 x 103 / COSC (pF).

Note 4: PSRR is the change in output voltage from a VDD of 4.5V and a VDD of 5.5V.

CLOCK

POWER REQUIREMENTS

SHUTDOWN

CONDITIONS

UNITS

MIN

TYP

MAX

PARAMETER

mA

IDD

Supply Current

ELECTRICAL CHARACTERISTICS—MAX7413/MAX7414 (continued)

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

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

fIN = 0.5fC

-1

-0.74

fIN = fC

-3.6

-3.0

-2.4

fIN = 4fC

-41.0

-35

fIN = 7fC

dB

-64.3

-58

fIN = 0.5fC

dB

-0.3

0

fIN = 3fC

fIN = fC

-3.6

-3.0

-2.4

Insertion Gain Relative to

DC Gain

-47.5

-43

fIN = 5fC

-70

-65

Insertion Gain Relative to

DC Gain

BESSEL FILTERS—MAX7409/MAX7413

BUTTERWORTH FILTERS—MAX7410/MAX7414