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参数资料
型号： AD8326ARP
厂商： ANALOG DEVICES INC
元件分类： 通用总线功能
英文描述： High Output Power Programmable CATV Line Driver
中文描述： LINE DRIVER, PDSO28
封装： HEAT SINK, POWER, SOIC-28
文件页数： 11/24页
文件大小： 475K
代理商： AD8326ARP
REV. 0
AD8326
–11–
Input Bias, Impedance, and T ermination
The V
IN
+ and V
IN
–
inputs have a dc bias level of approxi-
mately 1.47 V below V
CC
/2, therefore the input signal should
be ac-coupled using 0.1
μ
F capacitors as seen in the typical
application circuit (see Figure 5).
The differential input impedance of the AD8326 is approxi-
mately 1600
, while the single-ended input is 800
.
Single-E nded Inverting Input
When operating the AD8326 in a single-ended input mode V
IN
+
and V
IN
–
should be terminated as illustrated in Figure 6. On the
AD8326 evaluation boards, this termination method requires the
removal of R12, R13, R14, R16, R17, and R18. Install a 0
jumper at R15, an 82.5
resistor at R10 for a 75
system, and a
39.2
resistor at R11 to balance the inputs of the AD8326
evaluation board (Figure 11). Other input impedance configura-
tions may be calculated using the equations in Figure 6.
AD8326
+
R10
R11
–
Z
IN
= R10||800
R11 = Z
IN
||R10
V
IN
–
Figure 6. Single-Ended Input Impedance
The inverting and noninverting inputs of the AD8326 must be
balanced for all input configurations.
Differential Input from Single-E nded 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 R15
–
R17 to be removed, and 0
jumpers must be installed on the placeholders for R13, R14, and
R18. For a 75
input impedance, R12 should be 78.7
. Refer
to Figure 11 for evaluation board schematic. In this configuration,
the input signal must be applied to V
IN
–
. Other input imped-
ances may be calculated using the equation in Figure 7.
V
IN
–
AD8326
DESIRED IMPEDANCE = R12||1600
R12
Figure 7. Differential Signal from Single-Ended Source
Differential Signal Source
The AD8326 evaluation board is also capable of accepting a
differential input signal. This requires the installation of a 165
resistor in R12, the removal of R13
–
R14, R17
–
R18, and the
installation of 0
jumpers for R15
–
R16. This configuration
results in a differential input impedance of 150
. Other differ-
ential input impedance configurations may be calculated with
the equation in Figure 8.
V
IN
+
AD8326
V
IN
–
R12
DESIRED IMPEDANCE = R12||1600
Figure 8. Differential Input
DATEN
SDATA
CLK
GND1
V
CC
TXEN
SLEEP
GND
V
CC
V
CC
V
EE
GND
V
EE
V
OUT
–
GND
V
CC
V
IN
–
V
IN+
V
EE
V
CC
V
EE
BYP
V
CC
V
CC
V
EE
GND
V
EE
V
OUT+
AD8326
V
EE
TXEN
SLEEP
DATEN
SDATA
CLK
10 F
0.1 F
0.1 F
0.1 F
0.1 F
TOKO 617DB-A0070
TO DIPLEXER
Z
IN
= 75
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
165
V
IN
–
V
IN+
Z
IN
= 150
10 F
V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
Figure 5. Typical Applications Circuit
相关PDF资料
PDF描述
AD8326 High Output Power Programmable CATV Line Driver
AD8327ARU-REEL 5 V CATV Line Driver Coarse Step Output Power Control
AD8327 5 V CATV Line Driver Coarse Step Output Power Control
AD8327-EVAL 5 V CATV Line Driver Coarse Step Output Power Control
AD8327ARU 5 V CATV Line Driver Coarse Step Output Power Control
相关代理商/技术参数
参数描述
AD8326ARP-EVAL 制造商:Analog Devices 功能描述:AD8326 PSOP EVALUATION BOARD 制造商:Analog Devices 功能描述:AD8326 PSOP EVALUATION BOARD - Bulk
AD8326ARP-REEL 制造商:Analog Devices 功能描述:
AD8326ARPZ 制造商:Analog Devices 功能描述:SP AMP LINE DRVR AMP SGL 5.25V/12.6V 28PSOP-II - Rail/Tube
AD8327 制造商:AD 制造商全称:Analog Devices 功能描述:5 V CATV Line Driver Coarse Step Output Power Control
AD8327ARU 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
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