Datasheet

MAX7401/MAX7405
8th-Order, Lowpass, Bessel,
Switched-Capacitor Filters
_______________________________________________________________________________________ 5
-70
-50
-60
-40
-10
0
-20
-30
10
012345
FREQUENCY RESPONSE
MAX7401 toc01
INPUT FREQUENCY (kHz)
GAIN (dB)
f
C
= 1kHz
-3.5
-2.5
-3.0
-2.0
-0.5
0
-1.0
-1.5
0.5
0 202 404 606 808 1010
PASSBAND FREQUENCY RESPONSE
MAX7409 toc02
INPUT FREQUENCY (Hz)
GAIN (dB)
f
C
= 1kHz
1.97
1.99
1.98
2.01
2.00
2.02
2.03
-40 20 40-20 0 60 80 100
SUPPLY CURRENT
vs. TEMPERATURE
MAX7401 toc05
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
NO LOAD
MAX7401
MAX7405
10,000
0.1
0.01 0.1 1 10 100 1000
INTERNAL OSCILLATOR FREQUENCY
vs. C
OSC
CAPACITANCE
1
MAX7401 toc08
C
OSC
CAPACITANCE (nF)
OSCILLATOR FREQUENCY (kHz)
10
100
1000
-20
-15
-10
-5
0
5
10
15
20
2.5 3.53.0 4.0 4.5 5.0 5.5
OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
MAX7401 toc06
SUPPLY VOLTAGE (V)
OFFSET VOLTAGE (mV)
MAX7401
V
IN
= V
COM
= V
DD
/ 2
MAX7405
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
2.5 3.53.0 4.0 4.5 5.0 5.5
NORMALIZED OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
MAX7401 toc09
SUPPLY VOLTAGE (V)
NORMALIZED OSCILLATOR FREQUENCY
C
OSC
= 390pF
MAX7401
MAX7405
-400
-300
-350
-250
-100
-50
-150
-200
0
0 400 800 1200 1600 2000
PHASE RESPONSE
MAX7401 toc03
INPUT FREQUENCY (Hz)
PHASE SHIFT (DEGREES)
f
C
= 1kHz
1.5
1.8
1.7
1.6
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.5 3.53.0 4.0 4.5 5.0 5.5
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX7401 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
NO LOAD
MAX7405
MAX7401
-1.5
-1.0
0
-0.5
0.5
1.0
-40 0-20 20 40 60 80 100
OFFSET VOLTAGE vs. TEMPERATURE
MAX7401 toc07
TEMPERATURE (°C)
OFFSET VOLTAGE (mV)
V
IN
= V
COM
= V
DD
/ 2
Typical Operating Characteristics
(V
DD
= +5V for MAX7401, V
DD
= +3V for MAX7405; f
CLK
= 100kHz; SHDN = V
DD
; V
COM
= V
OS
= V
DD
/ 2; T
A
= +25°C; unless otherwise
noted.)