Rainbow Electronics MAX7425 - Manual (Page 4)

MAX7418–MAX7425
5th-Order, Lowpass,
Switched-Capacitor Filters
4 _______________________________________________________________________________________
FILTER CHARACTERISTICS
(V DD = +5V for MAX7418–MAX7421, V DD = +3V for MAX7422–MAX7425 filter output measured at OUT, 10k Ω || 50pF load to GND at
OUT, SHDN = V DD , f CLK = 2.2MHz, T A = T MIN to T MAX , unless otherwise noted.)
ELECTRICAL CHARACTERISTICS—MAX7422–MAX7425 (continued)
(V DD = +3V, filter output measured at OUT pin, 10k Ω || 50pF load to GND at OUT, OS = COM, 0.1µF capacitor from COM to GND,
SHDN = V
DD , f CLK = 2.2MHz, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)
CONDITIONS MIN TYP MAX SYMBOL PARAMETER
Measured at DC
SHDN = GND
0.5 V SDL
SHDN Input Low
2.5 V SDH
SHDN Input High
70 PSRR Power-Supply Rejection Ratio
0.2 1 I SHDN Shutdown Current
2.6 3.4
2.7 3.6 V DD Supply Voltage
V
V
dB
µA
V
UNITS
SHDN Input Leakage Current V SHDN = 0 to V DD ±0.2 ±10 µA
C
OSC
= 1000pF
(Note 3)
68 87 106
f OSC Internal Oscillator Frequency kHz
0.5 V IL Clock Input Low V
2.5 V IH Clock Input High V
68 87 106
I CLK
Clock Output Current (Internal
Oscillator Mode)
kHz
MAX7422/MAX7425
MAX7423/MAX7424 86 110 135
MAX7422/MAX7425
MAX7423/MAX7424 86 110 135
Operating mode,
no load
3.0 3.8
Supply Current I DD mA
MAX7422/MAX7425
MAX7423/MAX7424
MIN TYP MAX CONDITIONS PARAMETER
-0.4 ±0.2 0.4 f IN = 0.38f C
UNITS
Insertion Gain with DC Gain
Error Removed (Note 4)
dB
f IN = 0.68f C -0.4 ±0.2 0.4
-0.4 ±0.2 0.4 f IN = 0.87f C
-36 -33 f IN = 1.25f C
f IN = 0.97f C -0.4 ±0.2 0.4
-0.7 ±0.2 0.2 f IN = f C
f IN = 1.43f C -37.2 -35
-1 -0.74 f
IN
= 0.5f
C
f IN = 3.25f C -37.2 -35
Insertion Gain Relative to
DC Gain
dB
f IN = f C -3.6 -3.0 -2.4
f
IN
= 4f
C
-41.0 -35
-67 -60 f
IN
= 7f
C
CLOCK
POWER REQUIREMENTS
ELLIPTIC, r = 1.2—MAX7421/MAX7425
BESSEL FILTERS—MAX7419/MAX7423
SHUTDOWN