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参数资料
| 型号： | LMP8277MAX/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 2/13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： | LMP8277MAX |
14 RG
GAIN (NEW) =
RG - 100 k:
VS = 4.75V to 5.5V
OUT
LMP8277
+
-
A1
GND
+IN
-IN
A2
GAIN = 2
A1
A2
100 k:
GAIN = 7
PROPRIETARY
LEVEL - SHIFT
CIRCUITRY
RG
RG = (100 k:)
GAIN (NEW)
14 - GAIN (NEW)
14 RG
RG + 100 k:
GAIN (NEW) =
VS = 4.75V to 5.5V
OUT
LMP8277
+
-
A1
GND
+IN
-IN
A2
GAIN = 2
A1 A2
100 k:
GAIN = 7
PROPRIETARY
LEVEL - SHIFT
CIRCUITRY
RG
OBSOLETE
SNOSAK3G – DECEMBER 2004 – REVISED MARCH 2007
for the LMP8277, 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.
GAINS OTHER THAN 14
The LMP8277 has an internal gain of +14; however this gain can be modified. The signal path between the tow
amplifiers is available as external pins.
GAINS LESS THAN 14
shows the configuration used to reduce the LMP8277 gain.
Figure 23. Gains Less than 14
Where:
(7)
and
(8)
GAINS GREATER THAN 14
A higher gain can be achieved by using positive feedback on the second stage amplifier, A2, of the LMP8277.
Figure 24 shows the configuration:
Figure 24. Gains Greater Than 14
The total gain is given by:
(9)
Which can be rearranged to calculate RG:
10
Copyright 2004–2007, Texas Instruments Incorporated
Product Folder Links: LMP8277
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相关代理商/技术参数 |
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|---|---|
| LMP8278MMEVAL/NOPB | 制造商:Texas Instruments 功能描述:HIGH COMMON MODE, 14 X GAIN, PRECISION C - Boxed Product (Development Kits) 制造商:Texas Instruments 功能描述:BOARD EVAL FOR LMP8278 制造商:Texas Instruments 功能描述:High Common Mode, 14 x Gain, Precision C |
| LMP8278Q | 制造商:TI 制造商全称:Texas Instruments 功能描述:High Common Mode, 14 x Gain, Precision Current Sensing Amplifier |
| LMP8278QMM/NOPB | 功能描述:电流灵敏放大器 Hi Common Md Prec Current Sensing Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| LMP8278QMME/NOPB | 功能描述:电流灵敏放大器 Hi Common Md Prec Current Sensing Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| LMP8278QMMX/NOPB | 功能描述:电流灵敏放大器 Hi Common Md Prec Current Sensing Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
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