MAX295：8th-Order, Lowpass, Switched-Capacitor Filters _ BDTIC a Leading Distributor in China

MAX295：8th-Order, Lowpass, Switched-Capacitor Filters

Also See MAX7401/5 8th-Order, Low-Power Bessel Filters

The MAX291/MAX292/MAX295/MAX296 are easy-to-use, 8th-order, lowpass, switched-capacitor filters that can be set up with corner frequencies from 0.1Hz to 25kHz (MAX291/MAX292) or 0.1Hz to 50kHz (MAX295/MAX296). The MAX291/MAX295 Butterworth filters provide maximally flat passband response, and the MAX292/MAX296 Bessel filters provide low overshoot and fast settling. All four filters have fixed responses, so the design task is limited to selecting the clock frequency that controls the filter's corner frequency. An external capacitor is used to generate a clock using the internal oscillator, or an external clock signal can be used. An uncommitted operational amplifier (noninverting input grounded) is provided for building a continuous time lowpass filter for post-filtering or anti-aliasing. Produced in an 8-pin DIP/SO and a 16-pin wide SO package, and requiring a minimum of external components, the MAX291 series delivers very aggressive performance from a tiny area.

Key Features

8th-Order Lowpass Filters:
- Butterworth (MAX291/MAX295)
- Bessel (MAX292/MAX296)
Clock-Tunable Corner-Frequency Range:
- 0.1Hz to 25kHz (MAX291/MAX292)
- 0.1Hz to 50kHz (MAX295/MAX296)
No External Resistors or Capacitors Required
Internal or External Clock
Clock to Corner Frequency Ratio:
- 100:1 (MAX291/MAX292)
- 50:1 (MAX295/MAX296)
Low Noise: -70dB THD + Noise (Typ)
Operate with a Single +5V Supply or Dual ±5V Supplies
Uncommitted Op Amp for Anti-Aliasing or Clock-Noise Filtering
8-Pin DIP and SO Packages

MAX291, MAX292, MAX295, MAX296: Typical Operating Circuit

Applications/Uses

50Hz/60Hz Line-Noise Filtering
ADC Anti-Aliasing Filter
DAC Post-Filtering
Noise Analysis

DataSheet

title	Download file
MAX291-MAX296 Data Sheet	MAX291-MAX296.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 (Dual) (±V)	V_SUPPLY (V)	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	Dual	V_SUPPLY (V)	Oper. Temp. (°C)	Package/Pins	See Notes
MAX291	1	8	Switched Cap	Lowpass	Butterworth	Clock	0.1	25	5	5	-55 to +125 -40 to +85 0 to +70	CDIP(N)/8 PDIP(N)/8 SOIC(N)/8 SOIC(W)/16	$4.88 @1k
MAX292					Bessel			25				CDIP(N)/8 PDIP(N)/8 SOIC(N)/8 SOIC(W)/16	$4.20 @1k
MAX295					Butterworth			50				CDIP(N)/8 PDIP(N)/8 SOIC(N)/8 SOIC(W)/16	$3.92 @1k
MAX296					Bessel			50				CDIP(N)/8 PDIP(N)/8 SOIC(N)/8 SOIC(W)/16	$3.74 @1k

Quality and Environmental Data

MAX295.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX295C/D	NRND	MAX295ESA+	DICE SALES,;NA pin;DICE S;	0°C to +70°C	See data sheet
MAX295CPA	No Longer Available	MAX295CPA+	PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	No
MAX295CPA+	Active		PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	Lead Free
MAX295CSA	No Longer Available	MAX295CSA+	SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
MAX295CSA+	Active		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	Lead Free
MAX295CSA+T	Active		N.SO;8 pin	0°C to +70°C	See data sheet
MAX295CSA-T	No Longer Available	MAX295CSA+T	N.SO;8 pin	0°C to +70°C	See data sheet
MAX295CWE	No Longer Available	MAX295CWE+	SOIC(W),;16 pin;111.8 mm²	0°C to +70°C	No
MAX295CWE+	Active		SOIC(W),;16 pin;111.8 mm²	0°C to +70°C	Lead Free
MAX295CWE+T	Active		SOIC(W),;16 pin;111.8 mm²	0°C to +70°C	Lead Free
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX295CWE-T	No Longer Available	MAX295CWE+T	W.SO;16 pin	0°C to +70°C	See data sheet
MAX295EPA	No Longer Available	MAX295EPA+	PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	No
MAX295EPA+	Active		PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	Lead Free
MAX295ESA	No Longer Available	MAX295ESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX295ESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX295ESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX295ESA-T	No Longer Available	MAX295ESA+T	N.SO;8 pin	-40°C to +85°C	See data sheet
MAX295EWE	No Longer Available	MAX295EWE+	SOIC(W),;16 pin;111.8 mm²	-40°C to +85°C	No
MAX295EWE+	Active		SOIC(W),;16 pin;111.8 mm²	-40°C to +85°C	Lead Free
MAX295EWE+T	Active		SOIC(W),;16 pin;111.8 mm²	-40°C to +85°C	Lead Free
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX295EWE-T	No Longer Available	MAX295EWE+T	W.SO;16 pin	-40°C to +85°C	See data sheet
MAX295EWE/GH9	No Longer Available	MAX295EWE+	SOIC(W),;16 pin;111.8 mm²	-40°C to +85°C	No
MAX295EWE/GH9-T	No Longer Available	MAX295EWE+	SOIC(W),;16 pin;111.8 mm²	-40°C to +85°C	No
MAX295MJA	Active		CDIP(N),;8 pin;82.6 mm²	-55°C to +125°C	No