MAX7400/MAX7403/MAX7404/MAX7407
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX7404/MAX7407 (continued)
(V
DD
= +3V, filter output measured at OUT, 10kΩ || 50pF load to GND at OUT, SHDN = V
DD
, OS = COM, 0.1µF from COM to GND,
f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
ELLIPTIC (r = 1.5) FILTER CHARACTERISTICS—MAX7400/MAX7404
(V
DD
= +5V for MAX7400, V
DD
= +3V for MAX7404; filter output measured at OUT; 10kΩ || 50pF load to GND at OUT; SHDN = V
DD
;
V
COM
= V
OS
= V
DD
/ 2; f
CLK
= 100kHz; T
A
= T
MIN
to T
MAX
; unless otherwise noted. Typical values are at T
A
= +25°C.)
V
CLK
= 0 or 3V
C
OSC
= 1000pF (Note 4)
V
CONDITIONS
V
DD
- 0.5V
IH
µA±15 ±30I
CLK
Clock Input Current
kHz26 34 43f
OSC
Internal Oscillator Frequency
0.5V
IL
Clock Input High
UNITSMIN TYP MAXSYMBOLPARAMETER
SHDN = GND, CLK driven from 0 to V
DD
Operating mode, no load, IN = OS = COM
Measured at DC
µA0.2 1I
SHDN
mA2 3.5I
DD
Supply Current
V2.7 3.6V
DD
Supply Voltage
60PSRR
Shutdown Current
Power-Supply Rejection Ratio dB
V
DD
- 0.5V
SDH
SHDN Input High
V
V
SHDN
= 0 to V
DD
±0.1 ±10
SHDN Input Leakage Current
µA
V
SDL
0.5
Clock Input Low
SHDN Input Low
V
V
CLOCK
POWER REQUIREMENTS
SHUTDOWN
dB
CONDITIONS UNITSMIN TYP MAXPARAMETER
f
IN
= 0.371f
C
-0.20 -0.10 0.20
f
IN
= 0.737f
C
f
IN
= 0.587f
C
-0.20 -0.08 0.20
-0.20 0.02 0.20
f
IN
= 0.940f
C
f
IN
= 0.868f
C
-0.20 -0.03 0.20
f
IN
= 1.000f
C
f
IN
= 0.988f
C
-0.20 0.02 0.25
-0.20 0.09 0.25
-0.20 0.06 0.20
f
IN
= 1.601f
C
f
IN
= 1.500f
C
-84 -78
f
IN
= 4.020f
C
f
IN
= 2.020f
C
-85 -78
Insertion Gain Relative to DC Gain
(Note 5)
-83 -78
-82 -75
