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| 型号： | MAX7491EEE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/18页 |
| 文件大小： | 0K |
| 描述： | IC FILTER SW CAP DUAL 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 滤波器类型： | 通用开关电容器 |
| 频率 - 截止或中心： | 40kHz |
| 滤波器数： | 2 |
| 滤波器阶数： | 2nd |
| 电源电压： | 2.7 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
| 产品目录页面： | 1424 (CN2011-ZH PDF) |
MAX7490/MAX7491
Dual Universal Switched-Capacitor Filters
10
______________________________________________________________________________________
Table 1. Filter Operating Modes
MODE
LP
HP
BP
N
LP-N*
HP-N*
COMMENTS
1
fCLK/fO ratio is the nominal value. Good for bandpass filters
with identical sections cascaded, higher order Butterworth filters,
high-Q bandpass, low-Q notches.
1B
Same as Mode 1 with fCLK/fO ratios greater than the nominal
value.
2
Combination of Mode 1 and Mode 3; fCLK/fO ratios always
less than the nominal value. Less sensitivity to resistor tolerances
than Mode 3.
2N
Extension of Mode 2 that allows higher frequencies. Highpass
and lowpass outputs are summed with external op amp and
two resistors. Good for lowpass elliptic filters.
3
Adjustable fO above and below the nominal frequency.
Commonly used for multiple-pole Chebyshev filters, all-pole
higher order bandpass, lowpass, and highpass filters.
3A
Extension of Mode 3 that needs an external op amp and
two additional resistors. Commonly used for lowpass or higher
elliptic or Cauer filters.
*
LP-N = lowpass notch, HP-N = highpass notch. Both require an external op amp. See Definition of Terms (Table 2).
Table 2. Definition of Terms
TERM
DEFINITION
fCLK
The clock frequency applied to the switched-capacitor filter.
fO
The center frequency of the 2nd-order complex pole pair, fO, is determined by measuring the peak response
frequency at the bandpass output.
fNOTCH
The frequency of minimum amplitude response at the notch output.
Q
Quality factor, or Q, is the ratio of fO to the -3dB bandwidth of the 2nd-order bandpass filter. Q also determines
the amount of amplitude peaking at the lowpass and highpass outputs, but is not measured at these outputs.
HOBP
The gain in V/V of the bandpass output at f = fO.
HOLP
The gain in V/V of the lowpass output at f
→0Hz.
HOHP
The gain in V/V of the highpass output at f
→fCLK/2.
HON1
The notch output gain as f
→0Hz.
HON2
The notch output gain at f = fCLK/2.
LP-N
A notch output with HON1 > HON2.
HP-N
A notch output with HON1 < HON2.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX7490EEE+ | IC FILTER SW CAP DUAL 16-QSOP |
| MAX292CSA+ | IC FILTER LOWPASS 8-SOIC |
| MAX291CPA+ | IC FILTER LOWPASS 8-DIP |
| MAX295CSA+ | IC FILTER LOWPASS 8-SOIC |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7491EEE+ | 功能描述:有源滤波器 Dual Universal Switched-Cap RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX7491EEE+T | 功能描述:有源滤波器 Dual Universal Switched-Cap RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX7491EEE-T | 功能描述:有源滤波器 RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX749C/D | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX749CPA | 功能描述:显示驱动器和控制器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
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