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參數(shù)資料
| 型號(hào)： | AD8392 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Power, High Output Current, Quad Op Amp, Dual-Channel ADSL/ADSL2+ Line Driver |
| 中文描述： | 低功耗，高輸出電流，四路運(yùn)算放大器，雙通道ADSL/ADSL2線路驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大小： | 529K |
| 代理商： | AD8392 |
AD8392
THEORY OF OPERATION
The AD8392 is a current feedback amplifier with high (400 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, dV
O
/dI
IN
or T
Z
.
Rev. 0 | Page 11 of 16
The open-loop transimpedance is analogous to the open-loop
voltage gain of a voltage feedback amplifier. Figure 33 shows a
simplified model of a current feedback amplifier. Since R
IN
is
proportional to 1/g
m
, the equivalent voltage gain is just T
Z
× g
m
,
where g
m
is the transconductance of the input stage. Basic
analysis of the follower with gain circuit yields
( )
×
( )
F
IN
Z
Z
IN
O
R
R
G
T
T
G
V
V
+
+
×
=
where:
G
F
R
R
G
+
=
1
Ω
50
1
≈
=
m
IN
g
R
Since G × R
IN
<< R
F
for low gains, a current feedback amplifier
has relatively constant bandwidth versus gain, the 3 dB point
being set when |T
Z
| = R
F
.
Of course, for a real amplifier there are additional poles that
contribute excess phase, and there is a value for R
F
below which
the amplifier is unstable. Tolerance for peaking and desired
flatness determines the optimum R
F
in each application.
0
R
F
V
OUT
R
G
R
N
V
IN
R
IN
I
IN
T
Z
Figure 33. Simplified Block Diagram
The AD8392 is capable of delivering 400 mA of output current
while swinging to within 2 V of either power supply rail. The
AD8392 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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PDF描述 |
|---|---|
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8392A | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power, High Output Current, Quad Op Amp, Dual-Channel ADSL/ADSL2+ Line Driver |
| AD8392AACPZ-R2 | 制造商:Analog Devices 功能描述:ADSL Driver Quad 32-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:ADSL DRVR QUAD 32LFCSP EP - Tape and Reel |
| AD8392AACPZ-R7 | 功能描述:IC LINE DRVR ADSL/ADSL 32-LFCSP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:121 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):1/1 規(guī)程:RS422，RS485 電源電壓:3 V ~ 3.6 V 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-DFN（3x3） 包裝:管件 |
| AD8392AACPZ-RL | 功能描述:IC LINE DRVR ADSL/ADSL 32-LFCSP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:121 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):1/1 規(guī)程:RS422，RS485 電源電壓:3 V ~ 3.6 V 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-DFN（3x3） 包裝:管件 |
| AD8392AAREZ | 功能描述:IC ADSL/ADSL2 LINE DRVR 28-TSSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
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