MAX291：八阶、低通、开关电容滤波器 _ BDTIC 中国领先电子元器件代理商

MAX291：八阶、低通、开关电容滤波器

请参考MAX7401/MAX7405 8阶、低功耗贝塞尔滤波器

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.

关键特性

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：典型工作电路

应用

50Hz/60Hz电源噪声滤波
ADC抗混叠滤波器
DAC后置滤波
噪声分析

数据手册DataSheet

语言	下载文件	备注
英文	MAX291-MAX296.pdf	Rev 5; 08/2010

关键参数

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

质量和环境数据

MAX291.pdf

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX291C/D	停止供货	MAX291ESA+	DICE SALES,；NA引脚；DICE；	0°C至+70°C	参考数据资料
MAX291CPA	停止供货	MAX291CPA+	PDIP(N),；8引脚；79.7mm²	0°C至+70°C	RoHS/无铅：否
MAX291CPA+	生产中		PDIP(N),；8引脚；79.7mm²	0°C至+70°C	RoHS/无铅：无铅
MAX291CSA	停止供货	MAX291CSA+	SOIC(N),；8引脚；30.9mm²	0°C至+70°C	RoHS/无铅：否
MAX291CSA+	生产中		SOIC(N),；8引脚；30.9mm²	0°C至+70°C	RoHS/无铅：无铅
MAX291CSA+T	生产中		SOIC(N),；8引脚；30.9mm²	0°C至+70°C	RoHS/无铅：无铅
MAX291CSA-T	停止供货	MAX291CSA+T	N.SO；8引脚	0°C至+70°C	参考数据资料
MAX291CWE	停止供货	MAX291CWE+	SOIC(W),；16引脚；111.8mm²	0°C至+70°C	RoHS/无铅：否
MAX291CWE+	生产中		SOIC(W),；16引脚；111.8mm²	0°C至+70°C	RoHS/无铅：无铅
MAX291CWE+T	生产中		SOIC(W),；16引脚；111.8mm²	0°C至+70°C	RoHS/无铅：无铅
型号	状况	推荐替代产品	封装：类型引脚占位面积封装图编码/变更 *	温度	RoHS/无铅？
MAX291CWE-T	停止供货	MAX291CWE+T	W.SO；16引脚	0°C至+70°C	参考数据资料
MAX291EPA	停止供货	MAX291EPA+	PDIP(N),；8引脚；79.7mm²	-40°C至+85°C	RoHS/无铅：否
MAX291EPA+	生产中		PDIP(N),；8引脚；79.7mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX291ESA	停止供货	MAX291ESA+	SOIC(N),；8引脚；30.9mm²	-40°C至+85°C	RoHS/无铅：否
MAX291ESA+	生产中		SOIC(N),；8引脚；30.9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX291ESA+T	生产中		SOIC(N),；8引脚；30.9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX291ESA-T	停止供货	MAX291ESA+T	N.SO；8引脚	-40°C至+85°C	参考数据资料
MAX291EWE	停止供货	MAX291EWE+	SOIC(W),；16引脚；111.8mm²	-40°C至+85°C	RoHS/无铅：否
MAX291EWE+	生产中		SOIC(W),；16引脚；111.8mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX291EWE+T	生产中		SOIC(W),；16引脚；111.8mm²	-40°C至+85°C	RoHS/无铅：无铅
型号	状况	推荐替代产品	封装：类型引脚占位面积封装图编码/变更 *	温度	RoHS/无铅？
MAX291EWE-T	停止供货	MAX291EWE+T	W.SO；16引脚	-40°C至+85°C	参考数据资料
MAX291MJA	生产中		CDIP(N),；8引脚；82.6mm²	-55°C至+125°C	RoHS/无铅：否