MAX7424 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX7424 Datasheet PDF : 14 Pages
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5th-Order, Lowpass,
Switched-Capacitor Filters
ELECTRICAL CHARACTERISTICS—MAX7422–MAX7425 (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 = 2.2MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
CLOCK
Internal Oscillator Frequency
fOSC
COSC = 1000pF
(Note 3)
MAX7422/MAX7425 68
MAX7423/MAX7424 86
Clock Output Current (Internal
Oscillator Mode)
ICLK
MAX7422/MAX7425 68
MAX7423/MAX7424 86
Clock Input High
VIH
2.5
Clock Input Low
VIL
POWER REQUIREMENTS
Supply Voltage
Supply Current
Shutdown Current
Power-Supply Rejection Ratio
VDD
IDD
ISHDN
PSRR
Operating mode,
no load
SHDN = GND
Measured at DC
2.7
MAX7422/MAX7425
MAX7423/MAX7424
SHUTDOWN
SHDN Input High
VSDH
2.5
SHDN Input Low
SHDN Input Leakage Current
VSDL
VSHDN = 0 to VDD
TYP MAX UNITS
87
106
kHz
110
135
87
106
kHz
110
135
V
0.5
V
3.6
V
2.6
3.4
mA
3.0
3.8
0.2
1
µA
70
dB
V
0.5
V
±0.2
±10
µA
FILTER CHARACTERISTICS
(VDD = +5V for MAX7418–MAX7421, VDD = +3V for MAX7422–MAX7425 filter output measured at OUT, 10kΩ || 50pF load to GND at
OUT, SHDN = VDD, fCLK = 2.2MHz, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
ELLIPTIC, r = 1.2—MAX7421/MAX7425
fIN = 0.38fC
fIN = 0.68fC
fIN = 0.87fC
Insertion Gain with DC Gain
Error Removed (Note 4)
fIN = 0.97fC
fIN = fC
fIN = 1.25fC
fIN = 1.43fC
fIN = 3.25fC
BESSEL FILTERS—MAX7419/MAX7423
fIN = 0.5fC
Insertion Gain Relative to
DC Gain
fIN = fC
fIN = 4fC
fIN = 7fC
CONDITIONS
MIN
TYP MAX UNITS
-0.4
±0.2
0.4
-0.4
±0.2
0.4
-0.4
±0.2
0.4
-0.4
±0.2
0.4
dB
-0.7
±0.2
0.2
-36
-33
-37.2
-35
-37.2
-35
-1
-0.74
-3.6
-3.0
-2.4
dB
-41.0
-35
-67
-60
4 _______________________________________________________________________________________
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