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參數資料
| 型號： | LMP8270MA/NOPB |
| 廠商： | National Semiconductor |
| 文件頁數： | 4/17頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP PREC DIFF 8-SOIC |
| 標準包裝： | 95 |
| 系列： | LMP® |
| 放大器類型： | 差分 |
| 電路數： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉換速率： | 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） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 其它名稱： | *LMP8270MA *LMP8270MA/NOPB LMP8270MA |
VIN
R2
R3
C2
C1
R4
R1
+
-
2
1
3
IN
-
IN
+
VO
VF
Vs = 4.75 to 5.5V
OUT
LMP8270
+
-
A1
GND
+IN
-IN
A2
GAIN = 2
A1
A2
100 k:
GAIN = 10
C1
VDC
VDC + IRS1
PROPRIETARY
LEVEL-SHIFT
CIRCUITRY
VDC
L
O
A
D
1
RS1
I
OBSOLETE
SNOSAK1K – DECEMBER 2004 – REVISED APRIL 2013
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 measurement circuits to be at a positive voltage with respect to the common
side of the sense resistor. This will result in one or both of the inputs being negative with respect to the circuit’s
ground. The LMP8270 has a wide input common mode voltage range of
2V to 16V and will function in this
condition.
Figure 27. Low Side Current Sensing
SECOND ORDER LOW-PASS FILTER
The LMP8270 can be used to build a second order Sallen-Key low pass filter. The general filter is shown in
Figure 28. Second Order Low-Pass Filter
12
Copyright 2004–2013, Texas Instruments Incorporated
Product Folder Links: LMP8270
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LMP8270MAX/E7001108 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LMP8270MAX/NOPB | 功能描述:IC AMP PREC VOLT DIFF 8-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:LMP® 其它有關文件:Automotive Product Guide 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:通用 電路數:1 輸出類型:滿擺幅 轉換速率:3 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:70µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:Digi-Reel® 其它名稱:MAX4475AUT#TG16DKR |
| LMP8271 | 制造商:NSC 制造商全稱: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: |
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