MAX7408 Maxim, MAX7408 Datasheet - Page 5

• Manufacturer Part Number: MAX7408
• Description: 5th-Order / Lowpass / Elliptic / Switched-Capacitor Filters
• Manufacturer: Maxim

ELLIPTIC FILTER (r = 1.25) CHARACTERISTICS—MAX7411/MAX7415
(V
V
Note 1: The maximum f
Note 2: DC insertion gain is defined as ∆V
Note 3: f
Note 4: The input frequencies, f
(V
T
COM
Insertion Gain
with DC Gain Error Removed
(Note 4)
A
DD
DD
-100
-120
= +25°C; unless otherwise noted.)
-20
-40
-60
-80
20
= +5V for MAX7411, V
0
= V
= +5V for MAX7408/MAX7411, V
0
input at 0.2f
OSC
OS
PARAMETER
= V
(kHz)
1
FREQUENCY RESPONSE
MAX7408/MAX7412
INPUT FREQUENCY (kHz)
DD
/ 2; f
C
2
_______________________________________________________________________________________
.
27 · 10
C
CLK
is defined as the clock frequency f
3
DD
= 100kHz; T
3
/ C
f
r = 1.6
= +3V for MAX7415; filter output measured at OUT; 10kΩ
C
IN
= 1kHz
4
OSC
, are selected at the peaks and troughs of the ideal elliptic frequency responses.
f
f
f
f
f
f
f
f
IN
IN
IN
IN
IN
IN
IN
IN
= 0.38f
= 0.68f
= 0.87f
= 0.97f
= f
= 1.25f
= 1.43f
= 3.25f
(C
DD
5
A
OSC
C
= T
OUT
= +3V for MAX7412/MAX7415; f
C
C
C
C
C
C
C
in pF).
MIN
/ ∆V
-100
-120
-20
-40
-60
-80
20
to T
0
IN
0
.
MAX
5th-Order, Lowpass, Elliptic,
CONDITIONS
; unless otherwise noted. Typical values are at T
Switched-Capacitor Filters
1
FREQUENCY RESPONSE
CLK
MAX7411/MAX7415
INPUT FREQUENCY (kHz)
= 100 · f
2
Typical Operating Characteristics
3
C
at which the peak SINAD drops to 68dB with a sinusoidal
f
r = 1.25
CLK
C
= 1kHz
4
= 100kHz; SHDN = V
5
||
50pF load to GND at OUT; SHDN = V
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
0.2
MIN
-0.4
-0.4
-0.4
-0.4
-0.7
0
0
PASSBAND FREQUENCY RESPONSE
f
r = 1.6
C
= 1kHz
204
DD
-38.5
-37.2
-37.2
TYP
-0.2
-0.2
A
-0.2
MAX7408/MAX7412
0.2
0.2
INPUT FREQUENCY (Hz)
; V
= +25°C.) (Note 3)
COM
408
= V
MAX
-34
-35
-35
0.4
0.4
0.4
0.4
0.2
612
OS
= V
816
UNITS
DD
dB
1.02k
/ 2;
DD,
5