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| 型號： | LMP8270MAX/NOPB |
| 廠商： | National Semiconductor |
| 文件頁數(shù)： | 7/17頁 |
| 文件大小： | 0K |
| 描述： | IC AMP PREC VOLT DIFF 8-SOIC |
| 標準包裝： | 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） |
| 供應商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | LMP8270MAX |
RG = (100 k:)
GAIN (NEW)
GAIN (NEW) - 20
20 RG
GAIN (NEW) =
RG - 100 k:
OBSOLETE
SNOSAK1K – DECEMBER 2004 – REVISED APRIL 2013
The total gain is given by:
(7)
which can be rearranged to calculate RG:
(8)
The inverting gain of the second amplifier is set at 2, giving a total system gain of 20. The non-inverting gain
which is achieved through positive feedback can be less than or equal to this gain without any issues. This
implies a total system gain of 40 or less is easily achievable. Once the positive gain surpasses the negative gain,
the system might oscillate.
As the value of gain resistor, RG, approaches that of the internal 100 k resistor, maintaining gain accuracy will
become more challenging. This is because Gain(new) is inversely proportional to (RG-100 k), see Equation 7 .
As RG → 100 k, the denominator of Equation 7 gets smaller. This smaller value will be comparable to the
tolerance of the 100 k
resistor and RG and hence the gain will be dominated by accuracy level of these
resistors and the gain tolerance will be determined by the tolerance of the external resistor used for RG and the
3% tolerance of the internal 100 k
resistor.
Copyright 2004–2013, Texas Instruments Incorporated
15
Product Folder Links: LMP8270
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| LMP8271MA/NOPB | 功能描述:IC AMP PREC DIFF 8-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:LMP® 標準包裝:50 系列:LinCMOS™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.05 V/µs 增益帶寬積:110kHz -3db帶寬:- 電流 - 輸入偏壓:0.7pA 電壓 - 輸入偏移:210µV 電流 - 電源:57µA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設(shè)備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁面:865 (CN2011-ZH PDF) 其它名稱:296-1834296-1834-5 |
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