MAX7408 Maxim, MAX7408 Datasheet
MAX7408
Manufacturer Part Number
MAX7408
Description
5th-Order / Lowpass / Elliptic / Switched-Capacitor Filters
Manufacturer
Maxim
Datasheet
1.MAX7408.pdf
(12 pages)
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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
19-1378; Rev 1; 10/98
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX7408
MAX7411
MAX7412
MAX7415
PART
CLOCK
0.1 F
INPUT
V
SUPPLY
TRANSITION RATIO
Typical Operating Circuit
IN
CLK
________________________________________________________________ Maxim Integrated Products
r = 1.6
r = 1.25
r = 1.6
r = 1.25
MAX7408
MAX7411
MAX7412
MAX7415
General Description
V
GND
DD
CT2 Base Stations
Speech Processing
Selector Guide
SHDN
COM
OUT
OS
Applications
VOLTAGE (V)
OPERATING
OUTPUT
+5
+5
+3
+3
0.1 F
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
MAX7408CPA
MAX7408CUA
MAX7408EPA
MAX7408EUA
MAX7411CPA
MAX7411CUA
MAX7411EPA
MAX7411EUA
MAX7412CPA
MAX7412CUA
MAX7412EPA
MAX7412EUA
MAX7415CPA
MAX7415CUA
MAX7415EPA
MAX7415EUA
5th-Order, Elliptic Lowpass Filters
Low Noise and Distortion: -80dB THD + Noise
Clock-Tunable Corner Frequency (1Hz to 15kHz)
Single-Supply Operation
Low Power
Available in 8-Pin µMAX/DIP Packages
Low Output Offset: ±4mV
TOP VIEW
+5V (MAX7408/MAX7411)
+3V (MAX7412/MAX7415)
1.2mA (operating mode)
0.2µA (shutdown mode)
PART
COM
GND
V
DD
IN
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
1
2
4
3
Ordering Information
MAX/DIP
MAX7408
MAX7411
MAX7412
MAX7415
Pin Configuration
6
8
7
5
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-PACKAGE
CLK
SHDN
OS
OUT
Features
1
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