MH88620IN データシートの表示（PDF） - Mitel Networks
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MH88620IN Datasheet PDF : 14 Pages
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MH88620IN
Preliminary Information
MH88620IN
N1
R Internal
9000 Ω
N2
10 x
NETBAL
RP
N1
CP
Notes:
1) The 10xZin network must be set to 10 x the desired input Zin (impedance).
2) The 10 x NETBAL network must be set to10x the desired network balance.
3) Make connection between N1 and component as short as possible.
RS
[ ZNETBAL = 0.1 x RS + 1
]
1/RP + (SxCP)
where S = j x w
and w = 2 x π x f
Example:
If RS =0Ω, RP = 800Ω, CP=.5nF
Then the network balance is 800Ω in
parallel with 50nF.
Figure 4 - External Network Balance Setting
Loop Current
20
25
30
35
40
45
50
55
60
65
70
LCA Pin Connection
Connect 10kΩ from LCA to +5V.
Connect 16kΩ from LCA to +5V.
Connect 36kΩ from LCA to +5V.
Leave LCA open circuit.
Connect 24kΩ from LCA to -5V.
Connect 10kΩ from LCA to -5V.
Connect 5.6kΩ from LCA to -5V.
Connect 2.4kΩ from LCA to -5V.
Connect 1.3kΩ from LCA to -5V.
Connect 680kΩ from LCA to -5V.
Connect from LCA to -5V.
Table 5 - Loop Current Setting
Reference Fig#
5a
5a
5a
5c
5b
5b
5b
5b
5b
5b
5d
+5V
LCA
5a
2-168
R
LCA
-5V
5b
LCA
5c
Figure 5 - Loop Current Setting
LCA
-5V
5d
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