參數(shù)資料
型號(hào)： L9500A
英文描述： High-Voltage Ringing SLIC for VolP Applications
中文描述： 高壓振鈴用戶接口應(yīng)用的福爾普
文件頁(yè)數(shù)： 16/32頁(yè)
文件大?。?/td> 616K
代理商： L9500A
Preliminary Data Sheet
September 2001
High-Voltage Ringing SLIC for VoIP Applications
L9500A
16
Agere Systems Inc.
Electrical Characteristics
(continued)
Table 13. ac Feed Characteristics
1. Set externally either by discrete external components or a third- or fourth-generation codec. Any complex impedance R1 + R2 || C between
150
and 1400
can be synthesized.
2. This parameter is not tested in production. It is guaranteed by design and device characterization.
3. VITR transconductance depends on the resistor from ITR to VITR. This gain assumes an ideal 4750
, the recommended value. Positive cur-
rent is defined as the differential current flowing from PT to PR.
Parameter
Min
Typ
Max
Unit
ac Termination Impedance
1
Total Harmonic Distortion (200 Hz
—4 kHz)
2
:
Off-hook
On-hook
Transmit Gain (f = 1004 Hz, 1020 Hz)
3
:
PT/PR Current to VITR
Receive Gain, f = 1004 Hz, 1020 Hz Open Loop
RCVP or RCVN to PT—PR
Gain vs. Frequency (transmit and receive)
2
600
Termination,
1004 Hz, 1020 Hz reference:
200 Hz—300 Hz
300 Hz—3.4 kHz
3.4 kHz—20 kHz
20 kHz—266 kHz
Gain vs. Level (transmit and receive)
2
0 dBV Reference:
–55 dB to +3.0 dB
Idle-channel Noise (tip/ring) 600
Termination:
Psophometric
C-Message
3 kHz Flat
Idle-channel Noise (VTX) 600
Termination:
Psophometric
C-Message
3 kHz Flat
150
600
1400
—
—
—
—
0.3
1.0
%
%
300 – 3%
300
300 + 3%
V/A
7.76
8
8.24
—
–0.3
–0.05
–3.0
—
0
0
0
—
0.05
0.05
0.05
2.0
dB
dB
dB
dB
–0.05
0
0.05
dB
—
—
—
–82
8
—
–77
13
20
dBmp
dBrnC
dBrn
—
—
—
–82
8
—
–77
13
20
dBmp
dBrnC
dBrn
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