MAX7408：5th Order, Lowpass, Elliptic, Switched-Capacitor Filters

Smallest, Low-Power 5th-Order Filters

The MAX7408/MAX7411/MAX7412/MAX7415 5th-order, lowpass, elliptic, switched-capacitor filters (SCFs) operate 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.

Key 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: Typical Operating Circuit

Applications/Uses

ADC Anti-Aliasing
CT2 Base Stations
Post-DAC Filtering
Speech Processing

DataSheet

title	Download file
MAX7408-MAX7415 Data Sheet	MAX7408-MAX7415.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
MAX7408	1	5	Switched Cap	Lowpass	Elliptic	Clock	1	15	5	EE-Sim	-40 to +85 0 to +70	µMAX/8 PDIP(N)/8	$2.25 @1k
MAX7411									5			µMAX/8 PDIP(N)/8	$2.13 @1k
MAX7412									3			µMAX/8 PDIP(N)/8	$3.06 @1k
MAX7415									3			µMAX/8 PDIP(N)/8	$2.03 @1k

Design kits & evaluation modules

MAXFILTERBRD

Quality and Environmental Data

MAX7408.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX7408CPA	No Longer Available	MAX7408CPA+	PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	No
MAX7408CPA+	Active		PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	Lead Free
MAX7408CUA	No Longer Available	MAX7408CUA+	µMAX,;8 pin;15.6 mm²	0°C to +70°C	No
MAX7408CUA+	Active		µMAX,;8 pin;15.6 mm²	0°C to +70°C	Lead Free
MAX7408CUA+T	Active		µMAX,;8 pin;15.6 mm²	0°C to +70°C	Lead Free
MAX7408CUA-T	No Longer Available	MAX7408CUA+T	µMAX,;8 pin;15.6 mm²	0°C to +70°C	No
MAX7408EPA	No Longer Available	MAX7408EPA+	PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	No
MAX7408EPA+	Active		PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	Lead Free
MAX7408EUA	No Longer Available	MAX7408EUA+	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX7408EUA+	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX7408EUA+T	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX7408EUA-T	No Longer Available	MAX7408EUA+T	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX7408EUA/GG8	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX7408EUA/GG8-T	No Longer Available	MAX7408EUA+	uMAX;	-40°C to +85°C	See data sheet