19-4766; Rev 1; 9/98
5th-Order, Lowpass,
Switched-Capacitor Filters
General Description
The MAX7409/MAX7410/MAX7413/MAX7414 5th-order,
lowpass, switched-capacitor filters (SCFs) operate from
a single +5V (MAX7409/MAX7410) or +3V (MAX7413/
MAX7414) supply. These devices draw only 1.2mA of
supply current and allow corner frequencies from 1Hz
to 15kHz, making them ideal for low-power post-DAC
filtering and anti-aliasing applications. They feature a
shutdown mode, which reduces the supply current to
0.2µA.
Two clocking options are available on these devices:
self-clocking (through the use of an external capacitor)
or external clocking for tighter corner-frequency control.
An offset adjust pin allows for adjustment of the DC out-
put level.
The MAX7409/MAX7413 Bessel filters provide low over-
shoot and fast settling, while the MAX7410/MAX7414
Butterworth filters provide a maximally flat passband
response. Their fixed response simplifies the design
task to selecting a clock frequency.
Features
o
5th-Order Lowpass Filters
Bessel Response (MAX7409/MAX7413)
Butterworth Response (MAX7410/MAX7414)
o
Clock-Tunable Corner Frequency (1Hz to 15kHz)
o
Single-Supply Operation
+5V (MAX7409/MAX7410)
+3V (MAX7413/MAX7414)
o
Low Power
1.2mA (operating mode)
0.2µA (shutdown mode)
o
Available in 8-Pin µMAX/DIP Packages
o
Low Output Offset: ±4mV
MAX7409/MAX7410/MAX7413/MAX7414
Ordering Information
PART
MAX7409CUA
MAX7409CPA
MAX7409EUA
MAX7409EPA
MAX7410CUA
MAX7410CPA
MAX7410EUA
MAX7410EPA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
Applications
ADC Anti-Aliasing
DAC Postfiltering
Air-Bag Electronics
CT2 Base Stations
Speech Processing
Selector Guide
PART
MAX7409
MAX7410
MAX7413
MAX7414
FILTER RESPONSE
Bessel
Butterworth
Bessel
Butterworth
OPERATING
VOLTAGE (V)
+5
+5
+3
+3
Ordering Information continued at end of data sheet.
Typical Operating Circuit
V
SUPPLY
Pin Configuration
TOP VIEW
0.1µF
V
DD
INPUT
IN
SHDN
OUT
OUTPUT
COM
IN
GND
1
2
3
8
7
CLK
SHDN
OS
OUT
CLOCK
CLK
V
DD
4
MAX7409
MAX7410
MAX7413
MAX7414
µMAX/DIP
6
5
MAX7409
MAX7410
MAX7413
MAX7414
GND
COM
OS
0.1µF
________________________________________________________________
Maxim Integrated Products
1
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
