Rainbow Electronics MAX7415 - Manual

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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.
Applications
ADC Anti-Aliasing CT2 Base Stations
Post-DAC Filtering Speech Processing
Features
♦ 5th-Order, Elliptic Lowpass Filters
♦ Low Noise and Distortion: -80dB THD + Noise
♦ Clock-Tunable Corner Frequency (1Hz to 15kHz)
♦ Single-Supply Operation
+5V (MAX7408/MAX7411)
+3V (MAX7412/MAX7415)
♦ Low Power
1.2mA (operating mode)
0.2µA (shutdown mode)
♦ Available in 8-Pin µMAX/DIP Packages
♦ Low Output Offset: ±4mV
MAX7408/MAX7411/MAX7412/MAX7415
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
________________________________________________________________ Maxim Integrated Products 1
OS
OUT V DD
1
2
8
7
CLK
SHDN IN
GND
COM
µ
MAX/DIP
TOP VIEW
3
4
6
5
MAX7408
MAX7411
MAX7412
MAX7415
V DD
IN
CLK
OUT
GND
INPUT
0.1 µ F
0.1 µ F
CLOCK
SHDN
OUTPUT
COM
OS
MAX7408
MAX7411
MAX7412
MAX7415
V SUPPLY
Typical Operating Circuit
19-1378; Rev 1; 10/98
Pin Configuration
Ordering Information
PART
MAX7408 CPA
MAX7408CUA
MAX7408EPA -40°C to +85°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7408EUA
MAX7415 CPA
MAX7415CUA
MAX7415EPA -40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C 8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7415EUA -40°C to +85°C 8 µMAX
PART TRANSITION RATIO
OPERATING
VOLTAGE (V)
MAX7408 r = 1.6 +5
MAX7411 r = 1.25 +5
Selector Guide
MAX7412 r = 1.6 +3
MAX7415 r = 1.25 +3
MAX7411 CPA
MAX7411CUA
MAX7411EPA -40°C to +85°C
0°C to +70°C
0°C to +70°C 8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7411EUA -40°C to +85°C 8 µMAX
MAX7412 CPA
MAX7412CUA
MAX7412EPA -40°C to +85°C
0°C to +70°C
0°C to +70°C 8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7412EUA -40°C to +85°C 8 µMAX