MAX7480：8th-Order, Lowpass, Butterworth, Switched-Capacitor Filter

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.

Key Features

8th-Order, Lowpass Butterworth Filter
Low Noise and Distortion: -73dB THD + Noise
Clock-Tunable Corner Frequency (1Hz to 2kHz)
100:1 Clock-to-Corner Ratio
+5V Single-Supply Operation
Low Power
- 2.9mA (Operating Mode)
- 0.2µA (Shutdown Mode)
Available in 8-Pin SO/DIP Package
Low Output Offset: ±5mV

MAX7480: Typical Operating Circuit

Applications/Uses

ADC Anti-Aliasing
Post-DAC Filtering

DataSheet

title	Download file
MAX7480 Data Sheet	MAX7480.pdf

Parametrics

Part Number	Filter Sections	Order Per Filter Section	Filter Class	Filter Type	Filter Characteristic	Program Method	Lowest Cutoff (Hz)	Highest Cutoff (kHz)	V_SUPPLY (V)	Design Tools	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Filter Sections	Order Per Filter Section	Filter Class	Filter Type	Filter Characteristic	Program Method	max	min	V_SUPPLY (V)	Design Tools	Oper. Temp. (°C)	Package/Pins	See Notes
MAX7480	1	8	Switched Cap	Lowpass	Butterworth	Clock	1	2	5	EE-Sim	-40 to +85	PDIP(N)/8 SOIC(N)/8	$3.04 @1k

Quality and Environmental Data

MAX7480.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX7480EPA	No Longer Available	MAX7480EPA+	PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	No
MAX7480EPA+	Active		PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	Lead Free
MAX7480ESA	No Longer Available	MAX7480ESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX7480ESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX7480ESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX7480ESA-T	No Longer Available	MAX7480ESA+T	N.SO;8 pin	-40°C to +85°C	See data sheet

MAX7480.pdf MAX7480

A Filter Primer MAX7491

MAX7480.pdf MAX7480