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參數(shù)資料
| 型號(hào)： | LMP8277MAX/NOPB |
| 廠商： | National Semiconductor |
| 文件頁(yè)數(shù)： | 4/13頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP PREC VOLT DIFF 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | LMP® |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 0.7 V/µs |
| 增益帶寬積： | 80kHz |
| 電流 - 輸入偏壓： | 20pA |
| 電壓 - 輸入偏移： | 250µV |
| 電流 - 電源： | 1mA |
| 電壓 - 電源，單路/雙路(±)： | 4.75 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | LMP8277MAX |
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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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| 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 制造商全稱:Texas Instruments 功能描述:High Common Mode, 14 x Gain, Precision Current Sensing Amplifier |
| LMP8278QMM/NOPB | 功能描述:電流靈敏放大器 Hi Common Md Prec Current Sensing Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| LMP8278QMME/NOPB | 功能描述:電流靈敏放大器 Hi Common Md Prec Current Sensing Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| LMP8278QMMX/NOPB | 功能描述:電流靈敏放大器 Hi Common Md Prec Current Sensing Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
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