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| 型号： | LMP8270MAX/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 5/17页 |
| 文件大小： | 0K |
| 描述： | IC AMP PREC VOLT DIFF 8-SOIC |
| 标准包装： | 2,500 |
| 系列： | LMP® |
| 放大器类型： | 差分 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.7 V/µs |
| 增益带宽积： | 80kHz |
| 电流 - 输入偏压： | 20pA |
| 电压 - 输入偏移： | 250µV |
| 电流 - 电源： | 1mA |
| 电压 - 电源，单路/双路(±)： | 4.75 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 其它名称： | LMP8270MAX |
Z
o =
1
R1R2C1C2
fc =
1
2S
Q =
R1C1+R2C1+(1-K)R1C2
R1R2C1C2
VS = 4.75V to 5.5V
OUT
LMP8270
+
-
A1
GND
+IN
-IN
A2
GAIN = 2
A1
A2
R1 =
100 k:
GAIN = 10
PROPRIETARY
LEVEL - SHIFT
CIRCUITRY
C2
C1
R2
1
AVOL
+
R3
R3 + R4
=
1
K
M = s
2C
1C2R1R2 + s(R1C1+R1C2+C1R2) + 1
N = sC2R1
=
VO
VIN
K
M - KN
OBSOLETE
SNOSAK1K – DECEMBER 2004 – REVISED APRIL 2013
With the general transfer function:
where
and
(3)
K represents the sum of DC closed loop gain and the non-ideality behavior of the operational amplifier. Assuming
ideal behavior, the equation for K simply reduces to the DC gain, which is +2 for the LMP8270.
The LMP8270 can be used to realize this configuration as shown in Figure 29:
Figure 29. Low-Pass Filter With LMP8270
Using the filter parameters can be calculated as follows:
(4)
for the LMP8270, R1 = 100 k. Setting R1 = R2 and C1 = C2 results in a low-pass filter with Q = 1. Since the
values of resistors are predetermined, the corner frequency of this implementation of the filter depends on the
capacitor values.
Copyright 2004–2013, Texas Instruments Incorporated
13
Product Folder Links: LMP8270
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMP8271 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:High Common Mode, Gain of 20, Bidirectional Precision Voltage Difference Amplifiers |
| LMP8271A E0A WAF | 制造商:Texas Instruments 功能描述: |
| LMP8271A E0B WAF | 制造商:Texas Instruments 功能描述: |
| LMP8271MA | 制造商:Texas Instruments 功能描述:IC AMP DIFF SMD SOIC8 8271 |
| LMP8271MA/NOPB | 功能描述:IC AMP PREC DIFF 8-SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:LMP® 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
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