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参数资料
| 型号： | LMP8277MAX/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 4/13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 |
VS = 4.75 to 5.5V
OUT
LMP8277
+
-
A1
GND
+IN
-IN
A2
GAIN = 2
A1
A2
100 k:
GAIN = 7
C1
VDC
VDC + IRS1
PROPRIETARY
LEVEL-SHIFT
CIRCUITRY
VDC
L
O
AD
1
RS1
I
VDC
L
O
AD
1
VS = 4.75 to 5.5V
OUT
LMP8277
+
-
A1
GND
+IN
-IN
A2
GAIN = 2
A1
A2
100 k:
GAIN = 7
C1
RS1
VDC
VDC - IRS1
I
PROPRIETARY
LEVEL-SHIFT
CIRCUITRY
OBSOLETE
SNOSAK3G – DECEMBER 2004 – REVISED MARCH 2007
Figure 26. High Side Current Sensing
LOW SIDE CURRENT SENSING
Low side current measurements can cause a problem for operational amplifiers by exceeding the negative
common mode voltage limit of the device. In Figure 27, the load current is returning to the power source through
a common connection that has a parasitic resistance. The voltage drop across the parasitic resistances can
cause the ground connection of the circuits being at a positive voltage with respect to the common side of the
sense resistor. This will result in one or both of the inputs to be negative with respect to the measurement
circuit’s ground. The LMP8272 has a wide common mode voltage range of
2V to 16V and will function in this
condition.
Figure 27. Low Side Current Sensing
12
Copyright 2004–2007, Texas Instruments Incorporated
Product Folder Links: LMP8277
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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