MAX7418 Maxim, MAX7418 Datasheet - Page 5

• Manufacturer Part Number: MAX7418
• Description: 5th-Order / Lowpass / Switched-Capacitor Filters
• Manufacturer: Maxim

FILTER CHARACTERISTICS
(V
OUT, SHDN = V
Note 1: The maximum f
Note 2: DC insertion gain is defined as ∆V
Note 3: MAX7418/MAX7421/MAX7422/MAX7425: f
Note 4: PSRR is the change in output voltage from a V
__________________________________________Typical Operating Characteristics
(V
T
BUTTERWORTH FILTERS—MAX7420/MAX7424
BUTTERWORTH FILTERS—MAX7420/MAX7424
Insertion Gain Relative to
DC Gain
A
DD
DD
= +25°C, unless otherwise noted.)
-10
-20
-30
-40
-50
-60
-70
-80
-90
10
= +5V for MAX7418–MAX7421, V
= +5V for MAX7418–MAX7421, V
0
FREQUENCY RESPONSE (ELLIPTIC, r = 1.6)
0
sinusoidal input at 0.2f
MAX7419/MAX7420/MAX7423/MAX7424: f
PARAMETER
20
DD
MAX7418/MAX7422
INPUT FREQUENCY (kHz)
, f
40
CLK
_______________________________________________________________________________________
C
= 2.2MHz, T
is defined as the clock frequency f
60
C
. Maximum f
80
f
f
f
f
IN
IN
IN
IN
A
DD
= 0.5f
= f
= 3f
= 5f
DD
= T
100
C
= +3V for MAX7422–MAX7425 filter output measured at OUT, 10kΩ
= +3V for MAX7422–MAX7425, f
MIN
OUT
C
C
C
C
to T
increases as V
/ ∆V
-10
-20
-30
-40
-50
-60
10
0
MAX
0
IN
OSC
OSC
.
FREQUENCY RESPONSE (BESSEL)
, unless otherwise noted.)
DD
(kHz) ≅ 87x10
(kHz) ≅ 110x10
20
CONDITIONS
of 4.5V and a V
Switched-Capacitor Filters
MAX7419/MAX7423
INPUT FREQUENCY (kHz)
CLK
IN
signal amplitude decreases.
40
= 100 x f
3
60
3
/ C
/ C
DD
C
CLK
OSC
at which the peak S / (THD+N) drops to 68dB with a
OSC
of 5.5V.
80
5th-Order, Lowpass,
= 2.2MHz, SHDN = V
(pF).
(pF).
100
-10
-20
-30
-40
-50
-60
-70
-80
10
0
FREQUENCY RESPONSE (BUTTERWORTH)
0
MIN
-0.3
-3.6
DD
, V
20
MAX7420/MAX7424
INPUT FREQUENCY (kHz)
COM
-47.5
TYP
-3.0
-70
0
||
40
= V
50pF load to GND at
OS
MAX
60
-2.4
-43
-65
= V
DD
80
/ 2,
UNITS
dB
100
5