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參數(shù)資料
| 型號： | AM79M535 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Metering Subscriber Line Interface Circuit |
| 中文描述： | 計量用戶線接口電路 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 172K |
| 代理商： | AM79M535 |
12
Am79M535 Data Sheet
Table 2.
User-Programmable Components
Z
T
is connected between the VTX and RSN pins. The fuse
resistors are R
F
, and Z
2WIN
is the desired 2-wire AC input
impedance. When computing Z
T
, the internal current amplifier
pole and any external stray capacitance between VTX and
RSN must be taken into account.
Z
RX
is connected from V
RX
to the RSN pin, Z
T
is defined
above, and G
42L
is the desired receive gain.
R
DC1
, R
DC2
, and C
DC
form the network connected to the
RDC pin. R
DC1
and R
DC2
are approximately equal.
R
D
and C
D
form the network connected from RD to
–
5 V and
I
T
is the threshold current between on hook and off hook.
Z
M
is connected from V
MG
(metering source) to the RSN pin,
V
M2W
is the desired magnitude of the metering signal at the
2-wire output (usually 2.2 Vrms) and K
1
(
) is defined below.
where: CX = The values of the identical capacitors from
A and B to GND
metering frequency
ω
2
π
=
Z
T
510 Z
2WIN
2R
F
–
)
=
Z
RX
Z
G
42L
-----------
1000
510 Z
L
+
Z
T
2R
F
)
+
-------------------------------------------------
=
R
DCI
R
DC2
I
FEED
-------------
=
+
C
DC
1.5 ms
R
R
DC1
R
DC2
-------------------------------
=
R
D
I
T
--------
C
D
,
R
D
----------------
=
=
Z
M
V
V
M2W
--------------
K
ω
0.51
( )
2R
F
(
Z
T
K
1
ω
Z
L
+
)
+
------------------------------------------------------------------------
=
ω
K
1
ω
( )
CX 2
+
1
j
ω
11.5
(
10
9
–
)
36
(
Z
L
2R
F
+
+
)
+
-------------------------------------------------------------------------------------------------------------
=
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相關代理商/技術參數(shù) |
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| AM79M535-1JC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Metering Subscriber Line Interface Circuit |
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