Datasheet

MAX7400/MAX7403/MAX7404/MAX7407
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
_______________________________________________________________________________________ 7
-90
-70
-80
-50
-60
-40
-30
-10
-20
0
012345
THD PLUS NOISE vs. INPUT SIGNAL
AMPLITUDE (MAX7403)
MAX7400/03 13
AMPLITUDE (Vp-p)
THD + NOISE (dB)
NO LOAD
(SEE TABLE A)
B
C
D
-90
-70
-80
-50
-60
-40
-30
-10
-20
0
012345
THD PLUS NOISE vs. INPUT SIGNAL
AMPLITUDE AND RESISTIVE LOAD (MAX7403)
TABLE A. THD PLUS NOISE vs. INPUT SIGNAL
AMPLITUDE TEST CONDITIONS
MAX7400/03 14
AMPLITUDE (Vp-p)
THD + NOISE (dB)
f
IN
= 200Hz
f
C
= 1kHz
MEASUREMENT BW = 22kHz
R
L
= 500Ω
R
L =
1kΩ
R
L
= 10kΩ
TRACE
f
IN
(Hz)
f
C
(kHz)
f
CLK
(kHz)
MEASUREMENT
BANDWIDTH (kHz)
A
B
C
2800
2000
1000
14
10
5
1400
1000
500
80
80
80
D 200 1 100 22
Typical Operating Characteristics (continued)
(V
DD
= +5V for MAX7400/MAX7403, V
DD
= +3V for MAX7404/MAX7407; V
COM
= V
OS
= V
DD
/ 2; SHDN = V
DD
; f
CLK
= 100kHz;
T
A
= +25°C; unless otherwise noted.)
-90
-70
-80
-40
-50
-60
-10
-20
-30
0
0 1.00.5 1.5 2.0 2.5 3.0
THD PLUS NOISE vs. INPUT SIGNAL
AMPLITUDE AND RESISTIVE LOAD (MAX7404)
MAX7400 toc16
AMPLITUDE (Vp-p)
THD + NOISE (dB)
R
L
= 10kΩ
R
L
= 1kΩ
R
L
= 500Ω
f
IN
= 200Hz
f
C
= 1kHz
MEASUREMENT BW = 22kHz
-90
-70
-80
-40
-50
-60
-10
-20
-30
0
0 1.00.5 1.5 2.0 2.5 3.0
THD PLUS NOISE vs. INPUT SIGNAL
AMPLITUDE (MAX7407)
MAX 7400 toc17
AMPLITUDE (Vp-p)
THD + NOISE (dB)
NO LOAD
(SEE TABLE A)
A
B
C
D
-90
-70
-80
-40
-50
-60
-10
-20
-30
0
0 1.00.5 1.5 2.0 2.5 3.0
THD PLUS NOISE vs. INPUT SIGNAL
AMPLITUDE AND RESISTIVE LOAD (MAX7407)
MAXX7400 toc18
AMPLITUDE (Vp-p)
THD + NOISE (dB)
R
L
= 500Ω
f
IN
= 200Hz
f
C
= 1kHz
MEASUREMENT BW = 22kHz
R
L
= 10kΩ
R
L
= 1kΩ
-90
-70
-80
-40
-50
-60
-10
-20
-30
0
0 1.00.5 1.5 2.0 2.5 3.0
THD PLUS NOISE vs. INPUT SIGNAL
AMPLITUDE (MAX7404)
MAX7400 toc15
AMPLITUDE (Vp-p)
THD + NOISE (dB)
B
NO LOAD
(SEE TABLE A)
C
D
A