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| 型号： | MAX7411CUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC FILTER LOWPASS 5TH 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 滤波器类型： | 椭圆，低通开关电容器 |
| 频率 - 截止或中心： | 15kHz |
| 滤波器数： | 1 |
| 滤波器阶数： | 5th |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
| 配用： | MAXFILTERBRD+-ND - BOARD EVAL MAX7408/7415/418-7425 |
MAX7408/MAX7411/MAX7412/MAX7415
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
8
_______________________________________________________________________________________
Detailed Description
The MAX7408/MAX7411/MAX7412/MAX7415 family of
5th-order, elliptic, lowpass filters provides sharp rolloff
with good stopband rejection. All parts operate with a
100:1 clock-to-corner frequency ratio and a 15kHz
maximum corner frequency.
Most switched-capacitor filters (SCFs) are designed
with biquadratic sections. Each section implements two
pole-zero pairs, and the sections can be cascaded to
produce higher order filters. The advantage to this
approach is ease of design. However, this type of
design is highly sensitive to component variations
if any section’s Q is high. The MAX7408/MAX7411/
MAX7412/MAX7415 use an alternative approach, which
is to emulate a passive network using switched-capaci-
tor integrators with summing and scaling. The passive
network may be synthesized using CAD programs, or
may be found in many filter books. Figure 1 shows a
basic 5th-order ladder elliptic filter structure.
A switched-capacitor filter that emulates a passive lad-
der filter retains many of the same advantages. The
component sensitivity of a passive ladder filter is low
when compared to a cascaded biquadratic design,
because each component affects the entire filter shape
rather than a single pole-zero pair. In other words, a
mismatched component in a biquadratic design has a
concentrated error on its respective poles, while the
same mismatch in a ladder filter design spreads its
error over all poles.
Elliptic Characteristics
Lowpass elliptic filters such as the MAX7408/MAX7411/
MAX7412/MAX7415 provide the steepest possible
rolloff with frequency of the four most common filter
types (Butterworth, Bessel, Chebyshev, and elliptic).
The high Q value of the poles near the passband edge
combined with the stopband zeros allows for the sharp
attenuation characteristic of elliptic filters, making these
devices ideal for anti-aliasing and post-DAC filtering in
single-supply systems (see the
Anti-Aliasing and Post-
DAC Filtering section).
In the frequency domain, the first transmission zero
causes the filter’s amplitude to drop to a minimum level.
Beyond this zero, the response rises as the frequency
increases until the next transmission zero. The stop-
band begins at the stopband frequency, fS. At frequen-
cies above fS, the filter’s gain does not exceed the gain
at fS. The corner frequency, fC, is defined as the point
where the filter output attenuation falls just below the
passband ripple. The transition ratio (r) is defined as
the ratio of the stopband frequency to the corner fre-
quency:
r = fS / fC
The MAX7408/MAX7412 have a translation ratio of 1.6
and typically 53dB of stopband rejection. The
MAX7411/MAX7415 have a transition ratio of 1.25 (pro-
viding a steeper rolloff) and typically 37dB of stopband
rejection.
C4
C2
L4
C5
C3
C1
VIN
+
-
RL
L2
RS
Figure 1. 5th-Order Ladder Elliptic Filter Network
NAME
FUNCTION
1
COM
Common Input Pin. Biased internally at mid-supply. Bypass externally to GND with 0.1F capacitor. To
override internal biasing, drive with an external supply.
2
IN
Filter Input
PIN
3
GND
Ground
4
VDD
Positive Supply Input, +5V for MAX7408/MAX7411 or +3V for MAX7412/MAX7415
8
CLK
Clock Input. Connect an external capacitor (COSC) from CLK to GND to set the internal oscillator
frequency. To override the internal oscillator, connect to an external clock.
7
SHDN
Shutdown Input. Drive low to enable shutdown mode; drive high or connect to VDD for normal operation.
6
OS
Offset Adjust Input. To adjust output offset, bias OS with a resistive voltage-divider between an external
supply and ground. Connect OS to COM if no offset adjustment is needed.
5
OUT
Filter Output
Pin Description
相关PDF资料 |
PDF描述 |
|---|---|
| VE-B5P-IY-F2 | CONVERTER MOD DC/DC 13.8V 50W |
| MAX7414CUA+T | IC FILTER LOWPASS 5TH 8UMAX |
| VE-B5N-IY-F4 | CONVERTER MOD DC/DC 18.5V 50W |
| MAX7413CUA+T | IC FILTER LOWPASS 5TH 8UMAX |
| VE-20N-IY-F4 | CONVERTER MOD DC/DC 18.5V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7411EPA | 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 |
| MAX7411EPA+ | 功能描述:有源滤波器 5th-Order Lowpass Elliptic Filter 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 |
| MAX7411EUA | 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 |
| MAX7411EUA+ | 功能描述:有源滤波器 5th-Order Lowpass Elliptic Filter 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 |
| MAX7411EUA+T | 功能描述:有源滤波器 5th-Order Lowpass Elliptic Filter 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 |
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