MAX7480 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 8th-Order, Lowpass, Butterworth, Switched-Capacitor Filter

19-1416; Rev 0; 1/99
8th-Order, Lowpass, Butterworth,
Switched-Capacitor Filter
General Description
The MAX7480 8th-order, lowpass, Butterworth,
switched-capacitor filter (SCF) operates from a single
+5V supply. The device draws only 2.9mA of supply
current and allows corner frequencies from 1Hz to
2kHz, making it ideal for low-power post-DAC filtering
and anti-aliasing applications. The MAX7480 features a
shutdown mode, which reduces the supply current to
0.2µA.
Two clocking options are available: 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 output level.
The MAX7480 Butterworth filter provides a maximally
flat passband response. The fixed response simplifies
the design task to selecting a clock frequency.
Features
o 8th-Order, Lowpass Butterworth Filter
o Low Noise and Distortion: -73dB THD + Noise
o Clock-Tunable Corner Frequency (1Hz to 2kHz)
o 100:1 Clock-to-Corner Ratio
o +5V Single-Supply Operation
o Low Power
2.9mA (Operating Mode)
0.2µA (Shutdown Mode)
o Available in 8-Pin SO/DIP Package
o Low Output Offset: ±5mV
ADC Anti-Aliasing
Post-DAC Filtering
Applications
PART
MAX7480ESA
MAX7480EPA
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO
8 Plastic DIP
TOP VIEW
Pin Configuration
COM 1
IN 2
GND 3
V_DD 4
MAX7480
8 CLK
7 SHDN
6 OS
5 OUT
SO/DIP
Typical Operating Circuit
V_SUPPLY
0.1µF
INPUT
CLOCK
V_DD
SHDN
IN
OUT
MAX7480
CLK
COM
OS
GND
OUTPUT
0.1µF
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].