MAX7408 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 5th-Order, Lowpass, Elliptic, Switched-Capacitor Filters

19-1378; Rev 1; 10/98
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
General Description
The MAX7408/MAX7411/MAX7412/MAX7415 5th-order,
lowpass, elliptic, switched-capacitor filters (SCFs) oper-
ate from a single +5V (MAX7408/MAX7411) or +3V
(MAX7412/MAX7415) supply. The 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
can be put into a low-power mode, reducing supply
current to 0.2µA.
Two clocking options are available: self-clocking (through
the use of an external capacitor) or external clocking for
tighter cutoff-frequency control. An offset-adjust pin
allows for adjustment of the DC output level.
The MAX7408/MAX7412 deliver 53dB of stopband
rejection and a sharp rolloff with a transition ratio of 1.6.
The MAX7411/MAX7415 achieve a sharper rolloff with a
transition ratio of 1.25 while still providing 37dB of stop-
band rejection. Their fixed response limits the design
task to selecting a clock frequency.
ADC Anti-Aliasing
Post-DAC Filtering
Applications
CT2 Base Stations
Speech Processing
Selector Guide
PART TRANSITION RATIO
MAX7408
MAX7411
MAX7412
MAX7415
r = 1.6
r = 1.25
r = 1.6
r = 1.25
OPERATING
VOLTAGE (V)
+5
+5
+3
+3
Typical Operating Circuit
V_SUPPLY
0.1µF
INPUT
CLOCK
V_DD
SHDN
IN
OUT
MAX7408
MAX7411
CLK
MAX7412
MAX7415
COM
OS
GND
OUTPUT
0.1µF
Features
o 5th-Order, Elliptic Lowpass Filters
o Low Noise and Distortion: -80dB THD + Noise
o Clock-Tunable Corner Frequency (1Hz to 15kHz)
o Single-Supply Operation
+5V (MAX7408/MAX7411)
+3V (MAX7412/MAX7415)
o Low Power
1.2mA (operating mode)
0.2µA (shutdown mode)
o Available in 8-Pin µMAX/DIP Packages
o Low Output Offset: ±4mV
PART
MAX7408CPA
MAX7408CUA
MAX7408EPA
MAX7408EUA
MAX7411CPA
MAX7411CUA
MAX7411EPA
MAX7411EUA
MAX7412CPA
MAX7412CUA
MAX7412EPA
MAX7412EUA
MAX7415CPA
MAX7415CUA
MAX7415EPA
MAX7415EUA
Ordering Information
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
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 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
8 µMAX
Pin Configuration
TOP VIEW
COM 1
IN 2
GND 3
V_DD 4
MAX7408
MAX7411
MAX7412
MAX7415
8 CLK
7 SHDN
6 OS
5 OUT
µMAX/DIP
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].