MAX7409 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 5th-Order, Lowpass, Switched-Capacitor Filters

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.
Applications
ADC Anti-Aliasing
CT2 Base Stations
DAC Postfiltering
Speech Processing
Air-Bag Electronics
Selector Guide
PART
MAX7409
MAX7410
MAX7413
MAX7414
FILTER RESPONSE
Bessel
Butterworth
Bessel
Butterworth
OPERATING
VOLTAGE (V)
+5
+5
+3
+3
Pin Configuration
TOP VIEW
COM 1
IN 2
GND 3
V_DD 4
MAX7409
MAX7410
MAX7413
MAX7414
8 CLK
7 SHDN
6 OS
5 OUT
µMAX/DIP
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
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX7409CUA
0°C to +70°C
8 µMAX
MAX7409CPA
0°C to +70°C
8 Plastic DIP
MAX7409EUA -40°C to +85°C
8 µMAX
MAX7409EPA
MAX7410CUA
-40°C to +85°C
0°C to +70°C
8 Plastic DIP
8 µMAX
MAX7410CPA
0°C to +70°C
8 Plastic DIP
MAX7410EUA -40°C to +85°C
8 µMAX
MAX7410EPA
-40°C to +85°C
8 Plastic DIP
Ordering Information continued at end of data sheet.
Typical Operating Circuit
V_SUPPLY
0.1µF
INPUT
CLOCK
V_DD
SHDN
IN
OUT
MAX7409
MAX7410
MAX7413
CLK _MAX7414 COM
OS
GND
OUTPUT
0.1µF
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