參數(shù)資料
型號(hào)： LT1991AIDD
廠商： Linear Integrated Systems
英文描述： Precision, 100UA Gain Selectable Amplifier
中文描述： 精密，100uA的可選增益放大器
文件頁(yè)數(shù)： 16/24頁(yè)
文件大?。?/td> 311K
代理商： LT1991AIDD
LT1991
16
1991fb
Figure 10. Difference Amplifier Using the LT1991. Gain Is Set
Simply by Connecting the Correct Resistors or Combinations
of Resistors. Gain of 3 Is Shown, with Dashed Lines Modifying
It to Gain of 1.5. Noise Gain Is Optimal
Difference Amplifiers
The resistors in the LT1991 allow it to easily make differ-
ence amplifiers also. Figure 10 shows the basic 4-resistor
difference amplifier and the LT1991. A difference gain of
3 is shown, but notice the effect of the additional dashed
connections. By connecting the 450k resistors in parallel,
the gain is reduced by a factor of 2. Of course, with so
many resistors, there are many possible gains. Table 4
shows the difference gains and how they are achieved.
Note that, as for inverting amplifiers, the noise gain is 1
more than the signal gain.
Table 4. Connections Giving Difference Gains for the LT1991
Gain
V
IN+
0.077
P1
0.1
P1
0.25
P1
0.273
P3
0.3
P3
0.4
P1, P3
M1, M3
1
P1
1.5
P3
1.8
P9
2.25
P9
2.5
P1, P9
M1, M9
3
P3
4
P1, P3
M1, M3
4.5
P9
6
P3, P9
M3, M9
9
P9
10
P1, P9
M1, M9
12
P3, P9
M3, M9
13
P1, P3, P9
M1, M3, M9
V
IN–
M1
M1
M1
M3
M3
Output
M3, M9
M9
M3
M1, M9
M9
M9
GND (REF)
P3, P9
P9
P3
P1, P9
P9
P9
M1
M3
M9
M9
M1
P1
M1, M3
M3
M3
P1, P3
P3
P3
M3
M9
M1
M1
P1
P1
M9
APPLICATIOU
W
U
U
–
+
R
F
R
G
R
G
V
IN
+
V
IN
+
V
IN
–
V
IN
–
V
OUT
V
OUT
V
= GAIN (V
IN
GAIN = R
F
/R
G
+
– V
IN
–
)
–
+
1991 F10
50k
150k
450k
50k
150k
450k
450k
450k
8
6
5
9
10
1
2
3
LT1991
CLASSICAL DIFFERENCE AMPLIFIER USING THE LT1991
CLASSICAL DIFFERENCE AMPLIFIER IMPLEMENTED
WITH LT1991. R
F
= 450k, R
G
= 150k, GAIN = 3.
ADDING THE DASHED CONNECTIONS CONNECTS THE
TWO 450k RESISTORS IN PARALLEL, SO R
F
IS REDUCED
TO 225k. GAIN BECOMES 225k/150k = 1.5.
R
F
PARALLEL
TO CHANGE
R
F
, R
G
M9
M3
M1
P1
P3
P9
4pF
4pF
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1991AIDD#PBF 功能描述:IC AMP PREC GAIN SELECT 10-DFN RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)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(yīng)商設(shè)備封裝:SOT-6 包裝:Digi-Reel® 其它名稱:MAX4475AUT#TG16DKR
LT1991AIDD#TRPBF 功能描述:IC AMP PREC GAIN SELECT 10-DFN RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)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(yīng)商設(shè)備封裝:SOT-6 包裝:Digi-Reel® 其它名稱:MAX4475AUT#TG16DKR
LT1991AIDD-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Precision, 100μA Gain Selectable Amplifi er
LT1991AIDD-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Precision, 100μA Gain Selectable Amplifi er
LT1991AIMS 功能描述:IC AMP PREC GAIN SELECT 10MSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁(yè)面:865 (CN2011-ZH PDF) 其它名稱:296-1834296-1834-5
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