參數(shù)資料
型號: AD8271ARMZ
廠商: Analog Devices Inc
文件頁數(shù): 8/20頁
文件大小: 0K
描述: IC AMP PGA 15MHZ LDIST 10MSOP
設計資源: High Speed Instrumentation Amplifier Using AD8271 and ADA4627-1 (CN0122)
標準包裝: 50
放大器類型: 可編程增益
電路數(shù): 1
輸出類型: 滿擺幅
轉換速率: 30 V/µs
增益帶寬積: 15MHz
電流 - 輸入偏壓: 500nA
電壓 - 輸入偏移: 300µV
電流 - 電源: 2.3mA
電流 - 輸出 / 通道: 100mA
電壓 - 電源,單路/雙路(±): 5 V ~ 36 V,±2.5 V ~ 18 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
AD8271
Rev. 0 | Page 16 of 20
APPLICATIONS INFORMATION
The resistors and connections provided on the AD8271 offer
abundant versatility through the variety of configurations that
are possible.
DIFFERENCE AMPLIFIER CONFIGURATIONS
The AD8271 can be placed in difference amplifier configurations
with gains of , 1, and 2. Figure 45 through Figure 47 show
sample difference amplifier configurations referenced to ground.
=
07
36
3-
0
53
1
7
10k
AD8271
10k
10k
10k
20k
20k
10k
P4
P3
P2
P1
+IN
GND
OUT
N1
N2
N3
10
9
8
2
3
4
–IN
+IN
5k
5k
10k
10k
GND
Figure 45. Gain = Difference Amplifier, Referenced to Ground
=
–IN
+IN
10k
10k
10k
10k
GND
07
36
3-
0
54
1
7
10k
AD8271
10k
10k
10k
20k
20k
10k
P4
P3
P2
P1
+IN
NC
GND
OUT
N1
N2
N3
10
9
8
2
3
4
–IN
Figure 46. Gain = 1 Difference Amplifier, Referenced to Ground
=
–IN
+IN
10k
5k
5k
10k
GND
07
36
3-
05
5
1
7
10k
AD8271
10k
10k
10k
20k
20k
10k
P4
P3
P2
P1
OUT
N1
N2
N3
10
9
8
2
3
4
–IN
GND
+IN
OUT
Figure 47. Gain = 2 Difference Amplifier, Referenced to Ground
The AD8271 can also be referred to a combination of reference
voltages. For example, the reference can be set at 2.5 V, using
just 5 V and GND. Some of the possible configurations are
shown in Figure 48 through Figure 50. Note that the output
is not internally tied to a feedback path, so any of the 10 kΩ
resistors on the inverting input can be used in the feedback
network. This flexibility allows for more efficient board lay-
out options.
+VS + –VS
2
–IN
=
+IN
5k
5k
10k
10k
07
36
3-
0
56
1
7
10k
AD8271
10k
10k
10k
20k
20k
10k
P4
P3
P2
P1
+IN
–VS
+VS
OUT
N1
N2
N3
10
9
8
2
3
4
–IN
Figure 48. Gain = Difference Amplifier, Referenced to Midsupply
=
–IN
+IN
10k
10k
10k
10k
+VS + –VS
2
07
36
3-
0
57
1
7
10k
AD8271
10k
10k
10k
20k
20k
10k
P4
P3
P2
P1
+IN
NC
OUT
N1
N2
N3
10
9
8
2
3
4
–IN
–VS
+VS
Figure 49. Gain = 1 Difference Amplifier, Referenced to Midsupply
=
–IN
+IN
10k
5k
5k
10k
+VS + –VS
2
07
36
3-
0
58
1
7
10k
AD8271
10k
10k
10k
20k
20k
10k
P4
P3
P2
P1
+IN
–VS
+VS
OUT
N1
N2
N3
10
9
8
2
3
4
+IN
Figure 50. Gain = 2 Difference Amplifier, Referenced to Midsupply
Table 8. Pin Connections for Difference Amplifier Configurations
Configuration
Gain and Reference
Pin 1
(P1)
Pin 2
(P2)
Pin 3
(P3)
Pin 4
(P4)
Pin 8
(N1)
Pin 9
(N2)
Pin 10
(N3)
Gain of , Referenced to Ground
+IN
GND
OUT
IN
Gain of , Referenced to Midsupply
+IN
VS
+VS
OUT
IN
Gain of 1, Referenced to Ground
+IN
NC
GND
OUT
NC
IN
Gain of 1, Referenced to Midsupply
+IN
NC
VS
+VS
OUT
NC
IN
Gain of 2, Referenced to Ground
+IN
GND
OUT
IN
Gain of 2, Referenced to Midsupply
+IN
VS
+VS
OUT
IN
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