Datasheet

8th-Order, Lowpass,
Switched-Capacitor Filters
0
0 0.2 0.4 0.6 1.2 1.4 2.0
MAX296 LOW-VOLTAGE
FREQUENCY RESPONSE
-24
-28
-8
-12
-4
INPUT FREQUENCY (F/FC)
GAIN (dB)
0.8 1.0 1.6 1.8
-16
-20
V+ = +2.5V
V- = -2.5V
F
C
= 20kHz
F
C
= 2kHz
MAX291/2/5/6-13
0
1.0 1.1 1.3 1.5
MAX291 LOW-VOLTAGE
FREQUENCY RESPONSE
-24
-28
-8
-12
-4
INPUT FREQUENCY (F/FC)
GAIN (dB)
1.2 1.4
-16
-20
V+ = +2.5V
V- = -2.5V
F
C
= 20kHz
F
C
= 1kHz
MAX291/2/5/6-14
-40
12 3 67 10
MAX291 THD + NOISE vs.
INPUT SIGNAL AMPLITUDE
-75
-80
-55
-60
-50
-45
AMPLITUDE (Vp-p)
THD + NOISE (dB)
4
589
-65
-70
B
A
A: f
CLK
= 200kHz F
o
= 2kHz
INPUT FREQ. = 200Hz
MEAS. BANDWIDTH = 30kHz
B: f
CLK
= 1MHz F
o
= 1kHz
INPUT FREQ. = 1kHz
MEAS. BANDWIDTH = 80kHz
MAX291/2/5/6-15
0
0 0.2 0.4 0.6 1.2 1.4 2.0
MAX296 LOW-VOLTAGE PHASE RESPONSE
-540
-630
-180
-270
-90
INPUT FREQUENCY (F/FC)
PHASE SHIFT (Degrees)
0.8 1.0 1.6 1.8
-360
-450
V+ = +2.5V
V- = -2.5V
F
C
= 20kHz
F
C
= 2kHz
MAX291/2/5/6-16
-40
12 3 67 10
MAX295 THD + NOISE vs.
INPUT SIGNAL AMPLITUDE
-75
-80
-55
-60
-50
-45
AMPLITUDE (Vp-p)
THD + NOISE (dB)
4
589
-65
-70
C
D
C: f
CLK
= 200kHz F
o
= 4kHz
INPUT FREQ. = 400Hz
MEAS. BANDWIDTH = 30kHz
D: f
CLK
= 1MHz F
o
= 20kHz
INPUT FREQ. = 2kHz
MEAS. BANDWIDTH = 80kHz
MAX291/2/5/6-19
0
1.0 1.1 1.3 1.5
MAX291 LOW-FREQUENCY
PHASE RESPONSE
-480
-560
-160
-240
-80
INPUT FREQUENCY (F/FC)
PHASE SHIFT (Degrees)
1.2 1.4
-320
-400
V+ = +2.5V
V- = -2.5V
F
C
= 20kHz
F
C
= 1kHz
MAX291/2/5/6-17
-40
12 3 67 10
MAX292 THD + NOISE vs.
INPUT SIGNAL AMPLITUDE
-75
-80
-55
-60
-50
-45
AMPLITUDE (Vp-p)
THD + NOISE (dB)
4
589
-65
-70
A
B
A: f
CLK
= 200kHz F
o
= 2kHz
INPUT FREQ. = 200Hz
MEAS. BANDWIDTH = 30kHz
B: f
CLK
= 1MHz F
o
= 1kHz
INPUT FREQ. = 1kHz
MEAS. BANDWIDTH = 80kHz
MAX291/2/5/6-18
-40
12 3 67 10
MAX296 THD + NOISE vs.
INPUT SIGNAL AMPLITUDE
-75
-80
-55
-60
-50
-45
AMPLITUDE (Vp-p)
THD + NOISE (dB)
4
589
-65
-70
C
D
C: f
CLK
= 200kHz F
o
= 4kHz
INPUT FREQ. = 400Hz
MEAS. BANDWIDTH = 30kHz
D: f
CLK
= 1MHz F
o
= 20kHz
INPUT FREQ. = 2kHz
MEAS. BANDWIDTH = 80kHz
MAX291/2/5/6-20
Typical Operating Characteristics (continued)
(V+ = 5V, V- = -5V, R
LOAD
= 5kΩ, T
A
= +25°C, unless otherwise noted.)
MAX291/MAX292/MAX295/MAX296
Maxim Integrated
5