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參數(shù)資料
| 型號： | HC5523IM |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | LSSGR/TR57 CO/Loop Carrier SLIC with Low Power Standby |
| 中文描述： | TELECOM-SLIC, PQCC28 |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 176K |
| 代理商： | HC5523IM |
70
r = -20
log (2V
M
/V
S
)
where: Z
D
= The desired impedance; e.g., the characteristic
impedance of the line, nominally 600
.
(Reference Figure 6).
12. OverloadLevel(4-Wireport) -
The overload level is specified
at the 4-wire transmit port (V
TXO
) with the signal source (E
G
) at
the 2-wire port, I
DCMET
= 23mA, Z
L
= 20k
, R
SG
= 4k
(Refer-
ence Figure 7). Increase the amplitude of E
G
until 1% THD is
measured at V
TXO
. Note that the gain from the 2-wire port to
the 4-wire port is equal to 1.
13. OutputOffsetVoltage -
The output offset voltage is specified
with the following conditions: E
G
= 0, I
DCMET
= 23mA, Z
L
=
∞
and is measured at V
TX
. E
G
, I
DCMET
, V
TX
and Z
L
are defined
in Figure 7. Note: I
DCMET
is established with a series 600
resistor between tip and ring.
14. Two-Wire to Four-Wire (Metallic to V
TX
) Voltage Gain -
The
2-wire to 4-wire (metallic to V
TX
) voltage gain is computed
using the following equation.
G
2-4
= (V
TX
/V
TR
), E
G
= 0dBm0, V
TX
, V
TR
, and E
G
are defined
in Figure 7.
15. CurrentGainRSNtoMetallic -
The current gain RSN to
Metallic is computed using the following equation:
K = I
M
[(R
DC1
+ R
DC2
)/(V
RDC
- V
RSN
)] K, I
M
, R
DC1
, R
DC2
, V
RDC
and V
RSN
are defined in Figure 8.
16. Two-WiretoFour-WireFrequencyResponse -
The 2-wire to
4-wire frequency response is measured with respect to
E
G
= 0dBm at 1.0kHz, E
RX
= 0V, I
DCMET
= 23mA. The fre-
quency response is computed using the following equation:
F
2-4
= 20
log (V
TX
/V
TR
), vary frequency from 300Hz to
3.4kHz and compare to 1kHz reading.
V
TX
, V
TR
, and E
G
are defined in Figure 9.
17. Four-WiretoTwo-WireFrequencyResponse -
The 4-wire to
2-wire frequency response is measured with respect to E
RX
=
0dBm at 1.0kHz, E
G
= 0V, I
DCMET
= 23mA. The frequency
response is computed using the following equation:
F
4-2
= 20
log (V
TR
/E
RX
), vary frequency from 300Hz to
3.4kHz and compare to 1kHz reading.
V
TR
and E
RX
are defined in Figure 9.
18. Four-WiretoFour-WireFrequencyResponse -
The
to 4-wire frequency response is measured with respect to E
RX
= 0dBm at 1.0kHz, E
G
= 0V, I
DCMET
= 23mA. The frequency
response is computed using the following equation:
F
4-4
= 20
log (V
TX
/E
RX
), vary frequency from 300Hz to
3.4kHz and compare to 1kHz reading.
V
TX
and E
RX
are defined in Figure 9.
19. Two-WiretoFour-WireInsertionLoss -
The 2-wire to 4-wire
insertion loss is measured with respect to E
G
= 0dBm at 1.0kHz
input signal, E
RX
= 0, I
DCMET
= 23mA and is computed using
the following equation:
L
2-4
= 20
log (V
TX
/V
TR
)
where: V
TX
, V
TR
, and E
G
are defined in Figure 9. (Note: The
fuse resistors, R
F
, impact the insertion loss. The specified
insertion loss is for R
F
= 0).
4-wire
20. Four-WiretoTwo-WireInsertionLoss -
The 4-wire to 2-wire
insertion loss is measured based upon E
RX
= 0dBm, 1.0kHz
input signal, E
G
= 0, I
DCMET
= 23mA and is computed using
the following equation:
L
4-2
= 20
log (V
TR
/E
RX
)
where: V
TR
and E
RX
are defined in Figure 9.
21. Two-WiretoFour-WireGainTracking -
The 2-wire to 4-wire
gain tracking is referenced to measurements taken for E
G
=
-10dBm, 1.0kHz signal, E
RX
= 0, I
DCMET
= 23mA and is com-
puted using the following equation.
G
2-4
= 20
log (V
TX
/V
TR
) vary amplitude -40dBm to +3dBm, or
-55dBm to -40dBm and compare to -10dBm reading.
V
TX
and V
TR
are defined in Figure 9.
22. Four-WiretoTwo-WireGainTracking -
The 4-wire to 2-wire
gain tracking is referenced to measurements taken for E
RX
=
-10dBm, 1.0kHz signal, E
G
= 0, I
DCMET
= 23mA and is com-
puted using the following equation:
G
4-2
= 20
log (V
TR
/E
RX
) vary amplitude -40dBm to +3dBm,
or -55dBm to -40dBm and compare to -10dBm reading.
V
TR
and E
RX
are defined in Figure 9. The level is specified at the
4-wire receive port and referenced to a 600
impedance level.
23. Two-WireIdleChannelNoise -
The 2-wire idle channel noise
at V
TR
is specified with the 2-wire port terminated in 600
(R
L
)
and with the 4-wire receive port grounded (Reference Figure
10).
24. Four-WireIdleChannelNoise -
The 4-wire idle channel noise
at V
TX
is specified with the 2-wire port terminated in 600
(R
L
).
The noise specification is with respect to a 600
impedance
level at V
TX
. The 4-wire receive port is grounded (Reference
Figure 10).
25. HarmonicDistortion(2-Wireto4-Wire) -
The harmonic dis-
tortion is measured with the following conditions. E
G
= 0dBm at
1kHz, I
DCMET
= 23mA. Measurement taken at V
TX
. (Reference
Figure 7).
26. HarmonicDistortion(4-Wireto2-Wire) -
The harmonic dis-
tortion is measured with the following conditions. E
RX
= 0dBm0.
Vary frequency between 300Hz and 3.4kHz, I
DCMET
= 23mA.
Measurement taken at V
TR
. (Reference Figure 9).
27. ConstantLoopCurrent -
The constant loop current is calcu-
lated using the following equation:
I
L
= 2500 / (R
DC1
+ R
DC2
)
28. StandbyStateLoopCurrent -
The standby state loop current
is calculated using the following equation:
I
L
= [|V
BAT
| - 3] / [R
L
+1800], T
A
= 25
o
C
29. GroundKeyDetector -
(TRIGGER) Increase the input current
to 8mA and verify that DET goes low.
(RESET) Decrease the input current from 17mA to 3mA and verify
that DET goes high.
(Hysteresis) Compare difference between trigger and reset.
30. PowerSupplyRejectionRatio -
Inject a 100mV
RMS
signal
(50Hz to 4kHz) on V
BAT
, V
CC
and V
EE
supplies. PSRR is com-
puted using the following equation:
PSRR = 20
log (V
TX
/V
IN
). V
TX
and V
IN
are defined in Figure 12.
HC5523
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