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Parametric specs for Active Filters
Filter Type | Lowpass |
Filter Sections | 1 |
Order Per Filter Section | 5 |
Highest Cutoff (kHz) (min) | 45 |
Lowest Cutoff (Hz) (max) | 1 |
Filter Class | Switched Cap |
Filter Characteristic | Butterworth |
Program Method | Clock |
Oper. Temp. (°C) | -40 to +85 0 to +70 |
Package/Pins | UMAX/8 |
Budgetary Price (See Notes) | $3.07 @1k |
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技术文档
数据资料 | 五阶、低通、开关电容滤波器 | Nov 01, 2000 |
参量
Parametric specs for Active Filters
Filter Type | Lowpass |
Filter Sections | 1 |
Order Per Filter Section | 5 |
Highest Cutoff (kHz) (min) | 45 |
Lowest Cutoff (Hz) (max) | 1 |
Filter Class | Switched Cap |
Filter Characteristic | Butterworth |
Program Method | Clock |
Oper. Temp. (°C) | -40 to +85 0 to +70 |
Package/Pins | UMAX/8 |
Budgetary Price (See Notes) | $3.07 @1k |
主要特征
- 5th-Order, Lowpass Filters
- Elliptic Response (MAX7418/MAX7421/MAX7422/MAX7425)
- Bessel Response (MAX7419/MAX7423)
- Butterworth Response (MAX7420/MAX7424)
- Clock-Turnable Corner Frequency (1Hz to 45kHz)
- Single-Supply Operation
- +5V (MAX7418–MAX7421)
- +3V (MAX7422–MAX7425)
- Low Power
- 3mA (Operating Mode)
- 0.2µA (Shutdown Mode)
- Available in 8-Pin µMAX® Package
- Low Output Offset: ±4mV
应用/用途
- ADC抗混叠
- CT2基站
- DAC后置滤波
- 语音处理
描述
The MAX7418–MAX7425 5th-order, low-pass, switched-capacitor filters (SCFs) operate from a single +5V (MAX7418–MAX7421) or +3V (MAX7422–MAX7425) supply. These devices draw only 3mA of supply current and allow corner frequencies from 1Hz to 45kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They feature a shutdown mode that reduces 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 MAX7418/MAX7422 deliver 53dB of stopband rejection and a sharp rolloff with a 1.6 transition ratio. The MAX7421/MAX7425 achieve a sharper rolloff with a 1.25 transition ratio while still providing 37dB of stopband rejection. The MAX7419/MAX7423 Bessel filters provide low overshoot and fast settling, and the MAX7420/MAX7424 Butterworth filters provide a maximally flat passband response. Their fixed response simplifies the design task of selecting a clock frequency.
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 MAX7418/MAX7422 deliver 53dB of stopband rejection and a sharp rolloff with a 1.6 transition ratio. The MAX7421/MAX7425 achieve a sharper rolloff with a 1.25 transition ratio while still providing 37dB of stopband rejection. The MAX7419/MAX7423 Bessel filters provide low overshoot and fast settling, and the MAX7420/MAX7424 Butterworth filters provide a maximally flat passband response. Their fixed response simplifies the design task of selecting a clock frequency.
技术文档
数据资料 | 五阶、低通、开关电容滤波器 | Nov 01, 2000 |