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参数资料
| 型号： | MAX262BCNG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 24/26页 |
| 文件大小： | 0K |
| 描述： | IC FILTER ACT MPU PROG 24-DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 15 |
| 滤波器类型： | 通用开关电容器 |
| 频率 - 截止或中心： | 140kHz |
| 滤波器数： | 2 |
| 滤波器阶数： | 2nd |
| 电源电压： | 4.74 V ~ 12.6 V，±2.37 V ~ 6.3 V |
| 安装类型： | 通孔 |
| 封装/外壳： | 24-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 24-PDIP |
| 包装： | 管件 |
MAX260/MAX261/MAX262
Microprocessor Programmable
Universal Active Filters
_______________________________________________________________________________________
7
Introduction
Each MAX260/MAX261/MAX262 contains two second-
order switched-capacitor active filters. Figure 1 shows
the filter's state variable topology, employed with two
cascaded integrators and one summing amplifier. The
MAX261 and MAX262 also contain an uncommitted
amplifier. On-chip switches and capacitors provide
feedback to-control each filter section's f0 and Q.
Internal capacitor ratios are primarily responsible for
the accuracy of these parameters. Although these
switched-capacitor networks (SCN) are in fact sampled
systems, their behavior very closely matches that of
continuous filters, such as RC active filters. The ratio of
the clock frequency to the filter center frequency
(fCLK/f0) is kept large so that ideal second-order state-
variable response is maintained.
The MAX262 uses a lower range of sampling (fCLK/f0)
ratios than the MAX260 or MAX261 to allow higher
operating f0 frequencies and signal bandwidths. These
reduced sample rates result in somewhat more devia-
tion from ideal continuous filter parameters than with
the MAX260/MAX261. However, these differences can
be compensated using Figure 20 (see Application
Hints) or Maxim's filter design software.
The MAX260 employs auto-zero circuitry not included
in the MAX261 or MAX262. This provides improved DC
characteristics, and improved low-frequency perform-
ance at the expense of high-end f0 and signal band-
width. The N/HP/AP outputs of the MAX260 are internal-
ly sample-and-held as a result of its auto-zero
operation. Signal swing at this output is somewhat
reduced as a result (MAX260 only). See Table 1 for
bandwidth comparisons of the three filters.
Maxim also provides design programs that aid in con-
verting filter response specifications into the f0 and Q
program codes used by the MAX260 series devices.
This software also precompensates f0 and Q when low
sample rates are used.
It is important to note that, in all MAX260 series filters,
the filter's internal sample rate is one half the input
clock rate (CLKA or CLKB) due to an internal division
by two. All clock-related data, tables, and other dis-
cussions in this data sheet refer to the frequency at the
CLKA or CLKB input, i.e., twice the internal sample rate,
unless specifically stated otherwise.
Quick Look Design Procedure
The MAX260, MAX261, and MAX262, with Maxim's filter
design software, greatly simplify the design procedures
for many active filters. Most designs can be realized
using a three-step process described in this section. If
the design software is not used, or if the filter complexi-
ty is beyond the scope of this section, refer to the
remainder of this data sheet for more detailed applica-
tions and design information.
M1
M0
S2
SCN
IN
S3
S1
MODE
SELECT
SCN
Q0–Q6
(TABLE 3)
F0–F5
(TABLE 2)
S1
SAMPLE-HOLD
MAX260 ONLY
N/HP/AP
BP
LP
S2
S3
+
-
SCN = SWITCH-CAPACITOR NETWORK
+
-
∫
SCN
Σ
S-H
Figure 1. Filter Block Diagram (One Second-Order Section)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX262BCNG+ | 功能描述:有源滤波器 MPU Programmable Universal 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 |
| MAX262BCWG | 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 |
| MAX262BCWG+ | 功能描述:有源滤波器 MPU Programmable Universal 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 |
| MAX262BCWG+T | 功能描述:有源滤波器 MPU Programmable Universal 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 |
| MAX262BCWG-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 |
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