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| 型号： | AD8392AAREZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC LINE DRVR ADSL/ADSL 28-TSSOP |
| 标准包装： | 1,000 |
| 类型： | 驱动器 |
| 驱动器/接收器数： | 2/0 |
| 规程： | xDSL |
| 电源电压： | 5 V ~ 24 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-HTSSOP |
| 包装： | 带卷 (TR) |
AD8392A
Rev. 0 | Page 7 of 12
THEORY OF OPERATION
The AD8392A is a current feedback amplifier with high
(500 mA) output current capability. With a current feedback
amplifier, the current into the inverting input is the feedback
signal, and the open-loop behavior is that of a transimpedance,
dVO/dIIN or TZ.
The open-loop transimpedance is analogous to the open-loop
voltage gain of a voltage feedback amplifier. Figure 16 shows a
simplified model of a current feedback amplifier. Because RIN is
proportional to 1/gm, the equivalent voltage gain is TZ × gm,
where gm is the transconductance of the input stage. Basic
analysis of the follower with gain circuit yields
()
F
IN
Z
IN
O
R
G
S
T
S
T
G
V
+
×
+
×
=
where:
G
F
R
G
+
=1
Ω
50
1 ≈
=
m
IN
g
R
Because G × RIN << RF for low gains, a current feedback
amplifier has relatively constant bandwidth vs. gain, the 3 dB
point being set when |TZ| = RF.
Of course, for a real amplifier there are additional poles that
contribute excess phase, and there is a value for RF below which
the amplifier is unstable. Tolerance for peaking and desired
flatness determines the optimum RF in each application.
0
64
77-
022
RF
VOUT
RG
RN
VIN
RIN
IIN
TZ
Figure 16. Simplified Block Diagram
The AD8392A is capable of delivering 500 mA of output
current while swinging to within 2 V of either power supply
rail. The AD8392A also has a power management system
included on-chip. It features four user-programmable power
levels (three active power modes as well as the provision for
complete shutdown).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8392AAREZ-RL | 功能描述:IC LINE DRVR ADSL/ADSL 28-TSSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:121 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS422，RS485 电源电压:3 V ~ 3.6 V 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-DFN（3x3） 包装:管件 |
| AD8392ACP-R2 | 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| AD8392ACP-REEL | 制造商:Analog Devices 功能描述: |
| AD8392ACP-REEL7 | 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| AD8392ACPZ-RL | 制造商:Analog Devices 功能描述:ADSL Driver Quad 40MHz 32-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:Dual Port ADSL/ADSL+Line Driver |
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