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主要特征
应用/用途
Parametric specs for Active Filters
| Filter Type | Lowpass |
| Filter Sections | 1 |
| Order Per Filter Section | 8 |
| Highest Cutoff (kHz) (min) | 10 |
| Lowest Cutoff (Hz) (max) | 1 |
| Filter Class | Switched Cap |
| Filter Characteristic | Elliptic |
| Program Method | Clock |
| Oper. Temp. (°C) | -40 to +85 0 to +70 |
| Package/Pins | PDIP/8 SOIC (N)/8 |
| Budgetary Price (See Notes) | $3.09 @1k |
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简化框图
技术文档
| 数据资料 | 八阶、低通、椭圆函数、开关电容滤波器 | Jun 01, 1999 | |
| 设计指南 | Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface | ||
| 设计指南 | 集成方案简化模拟滤波器设计 | ||
| 设计指南 | 滤波器基础：抗混叠 | ||
| 设计指南 | A Filter Primer |
参量
Parametric specs for Active Filters
| Filter Type | Lowpass |
| Filter Sections | 1 |
| Order Per Filter Section | 8 |
| Highest Cutoff (kHz) (min) | 10 |
| Lowest Cutoff (Hz) (max) | 1 |
| Filter Class | Switched Cap |
| Filter Characteristic | Elliptic |
| Program Method | Clock |
| Oper. Temp. (°C) | -40 to +85 0 to +70 |
| Package/Pins | PDIP/8 SOIC (N)/8 |
| Budgetary Price (See Notes) | $3.09 @1k |
主要特征
- 8th-Order Lowpass Elliptic Filter
- Low Noise and Distortion -82dB THD + Noise (MAX7400)
- Clock-Tunable Corner Frequency (1Hz to 10kHz)
- 100:1 Clock-to-Corner Ratio
- Single-Supply Operation
- +5V (MAX7400/MAX7403)
- +3V (MAX7404/MAX7407)
- Low Power
- 2mA (Operating Mode)
- 0.2µA (Shutdown Mode)
- Available in 8-Pin SO and DIP Packages
- Low Output Offset: ±5mV
应用/用途
- ADC抗混叠
- 气囊电子装置
- CT2基站
- DAC后置滤波
- 语音处理
描述
The MAX7400/MAX7403/MAX7404/MAX7407 8th-order, lowpass, elliptic, switched-capacitor filters (SCFs) operate from a single +5V (MAX7400/MAX7403) or +3V (MAX7404/MAX7407) supply. These devices draw 2mA of supply current and allow corner frequencies from 1Hz to 10kHz, making them ideal for low-power anti-aliasing and post-DAC filtering applications. They feature a shutdown mode that 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 cutoff-frequency control. In addition, an offset adjustment pin (OS) allows for the adjustment of the DC output level.
The MAX7400/MAX7404 provide 82dB of stopband rejection and a sharp rolloff with a transition ratio of 1.5. The MAX7403/MAX7407 provide a sharper rolloff with a transition ratio of 1.2, while still delivering 60dB of stopband rejection. The fixed response of these devices simplifies the design task to corner-frequency selection by setting a clock frequency. The MAX7400/MAX7403/MAX7404/MAX7407 are available in 8-pin SO and DIP packages.
Two clocking options are available: self-clocking (through the use of an external capacitor) or external clocking for tighter cutoff-frequency control. In addition, an offset adjustment pin (OS) allows for the adjustment of the DC output level.
The MAX7400/MAX7404 provide 82dB of stopband rejection and a sharp rolloff with a transition ratio of 1.5. The MAX7403/MAX7407 provide a sharper rolloff with a transition ratio of 1.2, while still delivering 60dB of stopband rejection. The fixed response of these devices simplifies the design task to corner-frequency selection by setting a clock frequency. The MAX7400/MAX7403/MAX7404/MAX7407 are available in 8-pin SO and DIP packages.
技术文档
| 数据资料 | 八阶、低通、椭圆函数、开关电容滤波器 | Jun 01, 1999 | |
| 设计指南 | Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface | ||
| 设计指南 | 集成方案简化模拟滤波器设计 | ||
| 设计指南 | 滤波器基础：抗混叠 | ||
| 设计指南 | A Filter Primer |
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