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參數資料
| 型號： | 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，四路運算放大器，雙通道ADSL/ADSL2線路驅動器 |
| 文件頁數： | 14/16頁 |
| 文件大?。?/td> | 529K |
| 代理商： | AD8392 |
AD8392
Additional definitions for calculating resistor values include:
Rev. 0 | Page 14 of 16
V
OA
k
A
V
β
α
Note: R1 must be calculated before
β
and
α
.
(
N
Voltage at the amplifier outputs
Matching resistance reduction factor
Gain from V
IN
to transformer primary
Negative feedback factor
Positive feedback factor
)
k
V
V
LINE
OA
+
=
1
L
m
R
R
k
2
=
IN
LINE
V
V
N
V
A
=
R2
R1
R1
+
2
β
=
(
)
k
=
1
β
α
With the above known quantities and definitions, the remaining
resistors can readily be calculated.
P
OA
P
V
V
R
V
R1
=
2
2
(
)
IN
P
IN
V
(
2
IN
2
V
V
R
R4
=
)
(
)
R2
R1
R
R
R2
R
R1
R
R1
R
R1
R4
A
R3
L
L
L
L
m
V
2
α
2α
α
+
+
=
(
)
R4
R3
R4
R4
R3
α
R
BIAS
+
=
α
After building the circuit with the closest 1% resistor values,
the actual gain, input resistance, and output resistance can be
verified with the following equations.
(
)
(
)
R3
R4
R
R4
R3
R4
k
N
GAIN
BIAS
LINE
to
V
IN
+
+
+
=
1
1
β
+
R
=
L
L
m
V
IN
R4
R
R
A
R4
R
2
β
1
2
(
)
+
+
+
R4
+
=
BIAS
BIAS
R
BIAS
BIAS
R
m
OUT
R
R4
R
R3
R2
R1
R4
R1
R
R4
N
R
2
1
2
2
MULTITONE POWER RATIO
The DMT signal used in ADSL/ADSL2+ systems carries data in
discrete tones or bins, which appear in the frequency domain in
evenly spaced 4.3125 kHz intervals. In applications using this
type of waveform, multitone power ratio (MTPR) is a com-
monly used measure of linearity. Generally, there are two types
of MTPR that designers are typically concerned with: in-band
and out-of-band MTPR. In-band MTPR is defined as the
measured difference from the peak of one tone that is loaded
with data to the peak of an adjacent tone that is intentionally
left empty. Out-of-band MTPR is more loosely defined as the
spurious emissions that occur in the receive band located
between 25.875 kHz and the first downstream tone at 138 kHz.
Figure 38 and Figure 39 show the AD8392 in-band MTPR for a
5.5 crest factor waveform for empty bins in the ADSL and
extended ADSL2+ bandwidths. Figure 40 shows the AD8392
out-of-band MTPR for the same waveform.
CENTER 647kHz
0
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
SPAN 10kHz
1kHz/
72.2dB
Figure 38. In-Band MTPR at 647 kHz
CENTER 1.75MHz
0
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
SPAN 10kHz
1kHz/
64.4dB
Figure 39. In-Band MTPR at 1.751 MHz
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 - 驅動器，接收器，收發器 系列:- 標準包裝:121 系列:- 類型:收發器 驅動器/接收器數:1/1 規程: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 供應商設備封裝: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 - 驅動器，接收器，收發器 系列:- 標準包裝:121 系列:- 類型:收發器 驅動器/接收器數:1/1 規程: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 供應商設備封裝: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 - 驅動器，接收器，收發器 系列:- 標準包裝:27 系列:- 類型:收發器 驅動器/接收器數:3/3 規程: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） 供應商設備封裝:28-SOIC 包裝:管件 |
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