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參數(shù)資料
| 型號： | MAX7491EEE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 8/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC FILTER SW CAP DUAL 16-QSOP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 濾波器類型： | 通用開關電容器 |
| 頻率 - 截止或中心： | 40kHz |
| 濾波器數(shù)： | 2 |
| 濾波器階數(shù)： | 2nd |
| 電源電壓： | 2.7 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-QSOP |
| 包裝： | 帶卷 (TR) |
Wideband Noise
The wideband noise of the filter is the total RMS value
of the device’s noise spectral density and is used to
determine the operating SNR. Most of its frequency
contents lie within the filter’s passband and cannot be
reduced with postfiltering. The total noise depends
mainly on the Q of each filter section and the cascade
sequence. Therefore, in multistage filters, place the
section with the highest Q first for lower output noise.
Multiple Filter Stages
In some designs, such as very narrow band filters, or in
modes where fO cannot be tuned with resistors, several
2nd-order sections with identical fO may be cascaded
without multiple feedback. The total Q of the resultant
filter (QT) is:
Q is the Q of each individual filter section, and N is the
number of 2nd-order sections. In Table 5, the total Q and
total bandwidth (BW) are listed for up to five identical
2nd-order sections. B is the bandwidth of each section.
Chip Information
PROCESS: BiCMOS
Total Q
Q
T
N
/
//
=
()
21
11 2
MAX7490/MAX7491
Dual Universal Switched-Capacitor Filters
16
______________________________________________________________________________________
TOTAL SECTIONS
TOTAL BW
TOTAL Q
1
1.000 B
1.00 Q
2
0.644 B
1.55 Q
3
0.510 B
1.96 Q
4
0.435 B
2.30 Q
5
0.386 B
2.60 Q
Table 5. Cascading Identical Bandpass
Filter Sections
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX749C/D | 功能描述:顯示驅(qū)動器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| MAX749CPA | 功能描述:顯示驅(qū)動器和控制器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| MAX749CPA+ | 功能描述:顯示驅(qū)動器和控制器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| MAX749CPA+T | 制造商:Maxim Integrated Products 功能描述: |
| MAX749CSA | 功能描述:顯示驅(qū)動器和控制器 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
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