- 您現在的位置：買賣IC網 > PDF目錄377720 > LT1991IDD (Linear Integrated Systems) nullPrecision, 100UA Gain Selectable Amplifier PDF資料下載
參數資料
| 型號： | LT1991IDD |
| 廠商： | Linear Integrated Systems |
| 英文描述： | nullPrecision, 100UA Gain Selectable Amplifier |
| 中文描述： | nullPrecision，100uA的可選增益放大器 |
| 文件頁數： | 18/24頁 |
| 文件大?。?/td> | 303K |
| 代理商： | LT1991IDD |
LT1991
18
1991fb
Figure 12. Another Method of Selecting Difference Gain Is “Cross-Coupling.”
The Additional Method Means the LT1991 Provides All Integer Gains from 1 to 13
Figure 13. Integer Gain Difference
Amplifiers Using Cross-Coupling
Difference Amplifier: Additional Integer Gains Using
Cross-Coupling
Figure 12 shows the basic difference amplifier as well as
the LT1991 in a difference gain of 3. But notice the effect
of the additional dashed connections. This is referred to as
“cross-coupling” and has the effect of reducing the differ-
ential gain from 3 to 2. Using this method, additional
integer gains are achievable, as shown in Table 5 below, so
that all integer gains from 1 to 13 are achieved with the
LT1991. Note that the equations can be written by inspec-
tion from the V
IN+
connections, and that the V
IN–
connec-
tions are simply the opposite (swap P for M and M for P).
Noise gain, bandwidth, and input impedance specifica-
tions for the various cases are also tabulated, as these are
not obvious. Schematics are provided in Figure 13.
Table 5. Connections Using Cross-Coupling. Note That Equations
Can Be Written by Inspection of the V
IN+
Column
Noise –3dB BW
R
IN+
Typ k
Typ k
281
97
122
121
248
242
R
IN–
Gain
2
5
6*
7
8
11 P9, P3, M1 M9, M3, P1 9 + 3 – 1
V
IN+
P3, M1
P9, M3, M1 M9, P3, P1 9 – 3 – 1
P9, M3
M9, P3
P9, P1, M3 M9, M1, P3 9 + 1 – 3
P9, M1
M9, P1
V
IN–
M3, P1
Equation Gain
3 – 1
kHz
70
32
35
32
38
32
5
141
49
49
44
50
37
14
13
14
11
14
9 – 3
9 – 1
*Gain of 6 is better implemented as shown previously, but is included here for completeness.
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
+
– V
IN
–
)
GAIN = R
F
/R
G
–
+
1991 F10
50k
150k
450k
50k
150k
450k
450k
450k
8
6
5
9
10
1
2
3
LT1991
CLASSICAL DIFFERENCE AMPLIFIER
CLASSICAL DIFFERENCE AMPLIFIER IMPLEMENTED
WITH LT1991. R
F
= 450k, R
G
= 150k, GAIN = 3.
GAIN CAN BE ADJUSTED BY "CROSS COUPLING." MAKING THE
DASHED CONNECTIONS REDUCE THE GAIN FROM 3 T0 2.
WHEN CROSS COUPLING, SEE WHAT IS CONNECTED TO THE
V
VOLTAGE. CONNECTING P3 AND M1 GIVES +3 –1 = 2.
CONNECTIONS TO V
IN
–
ARE SYMMETRIC: M3 AND P1.
R
F
CROSS-
COUPLING
M9
M3
M1
P1
P3
P9
4pF
4pF
1991 F13
V
S–
V
S
+
V
S–
V
S
+
V
S–
V
S
+
V
S–
V
S
+
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
GAIN = 2
GAIN = 5
GAIN = 7
GAIN = 8
GAIN = 11
V
IN
+
V
IN
–
V
IN
+
V
IN
–
V
IN
+
V
IN
–
V
IN
+
V
IN
–
V
S–
V
S
+
M9
M3
M1
P1
P3
P9
OUT
V
CC
V
OUT
V
EE
REF
LT1991
8
9
10
1
2
3
7
6
5
4
V
IN
+
V
IN
–
相關PDF資料 |
PDF描述 |
|---|---|
| LT1993 | 14-Bit, 125/105Msps Low Power 3V ADCs |
| LTC2254IUH | 14-Bit, 125/105Msps Low Power 3V ADCs |
| LTC2255CUH | 14-Bit, 125/105Msps Low Power 3V ADCs |
| LTC2252 | 14-Bit, 125/105Msps Low Power 3V ADCs |
| LTC1747 | 14-Bit, 125/105Msps Low Power 3V ADCs |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LT1991IDD#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:- 標準包裝:50 系列:- 放大器類型:通用 電路數:2 輸出類型:滿擺幅 轉換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:管件 |
| LT1991IDD#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:- 標準包裝:1 系列:- 放大器類型:通用 電路數:4 輸出類型:滿擺幅 轉換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:2pA 電壓 - 輸入偏移:1000µV 電流 - 電源:85µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOICN 包裝:剪切帶 (CT) 產品目錄頁面:680 (CN2011-ZH PDF) 其它名稱:MCP6L04T-E/SLCT |
| LT1991IDD-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Precision, 100μA Gain Selectable Amplifi er |
| LT1991IDD-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Precision, 100μA Gain Selectable Amplifi er |
| LT1991IMS | 功能描述:IC AMP PREC GAIN SELECT 10MSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1,000 系列:- 放大器類型:電壓反饋 電路數:4 輸出類型:滿擺幅 轉換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 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） 供應商設備封裝:14-SOIC 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復。