參數(shù)資料
型號: ADA4817-2ACPZ-RL
廠商: Analog Devices Inc
文件頁數(shù): 14/28頁
文件大?。?/td> 0K
描述: IC OPAMP VF 410MHZ DUAL 16LFCSP
標準包裝: 5,000
系列: FastFET™
放大器類型: 電壓反饋
電路數(shù): 2
轉換速率: 870 V/µs
增益帶寬積: 410MHz
-3db帶寬: 1.05GHz
電流 - 輸入偏壓: 2pA
電壓 - 輸入偏移: 400µV
電流 - 電源: 19mA
電流 - 輸出 / 通道: 40mA
電壓 - 電源,單路/雙路(±): 5 V ~ 10 V,±2.5 V ~ 5 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 16-VQFN 裸露焊盤,CSP
供應商設備封裝: 16-LFCSP-VQ EP(4x4)
包裝: 帶卷 (TR)
Data Sheet
ADA4817-1/ADA4817-2
Rev. B | Page 21 of 28
HIGH SPEED JFET INPUT INSTRUMENTATION
AMPLIFIER
Figure 53 shows an example of a high speed instrumentation
amplifier with a high input impedance using the ADA4817-1/
ADA4817-2. The dc transfer function is
(
)
+
=
G
F
P
N
OUT
R
V
2
1
(16)
For G = 1, it is recommended that the feedback resistors for the
two preamps be set to 0 and the gain resistor be open. The
system bandwidth for G = 1 is 400 MHz. For gains higher than 2,
the bandwidth is set by the preamp, and it can be approximated by
In-amp3dB = (fCR × RG)/(2 × RF)
Common-mode rejection of the in-amp is primarily determined by
the match of resistor ratios, R1:R2 to R3:R4. It can be estimated by
(
)
(
) 2
1
2
1
δ
+
δ
δ
=
CM
O
V
(17)
The summing junction impedance for the preamps is equal
to RF || 0.5(RG). Keep this value relatively low to improve the
bandwidth response like in the previous example.
VCC
VEE
10F
0.1F
10F
0.1F
RS1
VN
R2
350
VP
ADA4817-1
VO
RG
VCC
VEE
VCC
VEE
R4
350
RS2
10F
0.1F
10F
0.1F
R1
350
R3
350
RF = 500
10F
0.1F
10F
0.1F
07756-
050
ADA4817-2
U1
ADA4817-2
U2
Figure 53. High Speed Instrumentation Amplifier
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