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參數(shù)資料
| 型號： | AD8327ARU-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 20/20頁 |
| 文件大小： | 0K |
| 描述： | IC LN DVR CATV COARS-STP 20TSSOP |
| 產(chǎn)品變化通告： | AD8327 Discontinuation 28/Feb/2012 |
| 標準包裝： | 1 |
| 類型： | 線路驅動器，發(fā)射器 |
| 應用： | 調制解調器，機頂盒 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 20-TSSOP |
| 包裝： | 標準包裝 |
| 其它名稱： | AD8327ARU-REELDKR |
REV. 0
AD8327
–9–
Single-Ended Inverting Input
When operating the AD8327 in a single-ended input mode VIN+
and VIN– should be terminated as illustrated in Figure 5. On the
AD8327 evaluation boards, this termination method requires
the removal of R13–R16 and R20, as well as the addition of a 0
jumper at R17. Table II shows the correct values for R11 and R12
for some common input configurations. Other input imped-
ance configurations may be accommodated using the equations
in Figure 5. The inverting and noninverting inputs of the AD8327
must be balanced for all input configurations
+
–
R11
R12
ZIN
800
– ZIN
R12 =
AD8327
ZIN
R12
R12 + ZIN
R11 =
Figure 5. Single-Ended Inverting Input
Differential Input from Single-Ended Source
The default configuration of the evaluation board implements a
differential signal drive from a single-ended signal source. A
TOKO 1:1 transformer is included on the board for this purpose
(T3). Enabling the evaluation board for single to differential input
conversion requires R11–R12 and R16–R17 to be removed, and
0
jumpers must be installed on the placeholders for R14, R15,
and R20. Table II provides typical R13 values for common
input configurations. Other input impedances may be calculated
using the equation in Figure 6. Refer to Figure 10 for evaluation
board schematic. To utilize the transformer for converting a single-
ended source into a differential signal, the input signal must
be applied to VIN+.
VIN+
R13
AD8327
R13 =
ZIN
1600
– ZIN
ZIN
Figure 6. Single to Differential Input
Differential Signal Source
The AD8327 evaluation board is also capable of accepting a
differential input signal. Remove R11–R12, R14–R15, and R20,
and place 0
jumpers for R16–R17. See Table II for common
values of R13, or calculate other input configurations using the
equation in Figure 7.
VIN+
AD8327
VIN–
R13
ZIN
R13 =
ZIN
1600
– ZIN
Figure 7. Differential Input
Output Bias, Impedance, and Termination
The output of the AD8327 has a dc bias level of approximately
VCC/2; therefore, it should be ac-coupled before being applied to
the load. The output impedance of the AD8327 is internally
maintained at 75
, regardless of whether the amplifier is in
transmit enable or transmit disable mode. This eliminates the
need for external back termination resistors. If the output signal
is being evaluated using standard 50
test equipment, a mini-
mum loss 75
to 50 pad must be used to provide the test
circuit with the proper impedance match.
SDATA
CLK
GND
VCC
TXEN
VCC
CXR
GND
VOUT
SLEEP
VIN–
VIN+
BYP
VCC
GND
VCC
ENB
AD8327
10 F
TO DIPLEXER ZIN = 75
TXEN
SDATA
CLK
SLEEP
ENB
0.1 F
165
VIN–
VIN+
ZIN = 150
VCC
0.1 F
100pF
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
0.1 F
Figure 4. Typical Application Circuit
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD8327ARUZ | 制造商:Analog Devices 功能描述:SP Amp Line Driver Amp Single 5.25V 20-Pin TSSOP Tube 制造商:Rochester Electronics LLC 功能描述:TSSOP COARSE STEP CATV LINE DRIVER - Bulk |
| AD8327ARUZ-REEL | 制造商:Analog Devices 功能描述:SP Amp Line Driver Amp Single 5.25V 20-Pin TSSOP T/R |
| AD8327-EVAL | 制造商:Analog Devices 功能描述:Evaluation Kit For 5 V CATV Line Driver Coarse Step Output Power Control |
| AD8328 | 制造商:AD 制造商全稱:Analog Devices 功能描述:5 V Upstream Cable Line Driver |
| AD8328_05 | 制造商:AD 制造商全稱:Analog Devices 功能描述:5 V Upstream Cable Line Driver |
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