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參數(shù)資料
| 型號(hào)： | L7585G |
| 英文描述： | Full-Feature,Low-Power SLIC and Switch |
| 中文描述： | 全功能，低功耗SLIC和開關(guān) |
| 文件頁數(shù)： | 13/22頁 |
| 文件大?。?/td> | 446K |
| 代理商： | L7585G |
Agere Communications Inc.
13
Data Sheet
September 2001
L7585G Full-Feature, Low-Power SLIC and Switch
Electrical Characteristics
(continued)
Transmit direction is tip/ring to VTX. Receive direction is RCVP(N) to tip/ring.
Table 8. Transmission Characteristics
1. Set by external components in conjunction with the T7531A/T7536 codecs. Any complex impedance R1 + R2 || C between 200
and
1200
can be synthesized.
2. Return loss and transhybrid loss are functions of device gain accuracies and the external hybrid circuit. Guaranteed performance assumes
1% tolerance external resistors and capacitors.
3. This parameter is not tested in production; it is guaranteed by design and device characterization.
4. VTX gain depends on the resistor RGX1 from pin VITR to pin ITR. This gain assumes an ideal 8250
, the recommended value. Positive cur-
rent is defined as the differential current flowing from PT to PR. The transmit signal at VTX is measured with respect to pin VRTX.
Parameter
Min
200
Typ
—
Max
1200
Unit
ac Termination Impedance
1
Return Loss
2
:
200 Hz—500 Hz
500 Hz—3400 Hz
Total Harmonic Distortion (200 Hz—4 kHz)
3
:
Off-hook
On-hook
Transmit Gain (f = 1 kHz)
4
:
PT/PR Current to (VTX—VRTX)
Receive Gain (f = 1 kHz):
(RCVP—RCVN) to (PT—PR)
Gain vs. Frequency (transmit and receive)
3
(600
termination; 1 kHz 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; 0 dBV reference)
3
:
–50 dB to +3 dB
Transhybrid Loss
2
:
200 Hz—500 Hz
500 Hz—3400 Hz
Idle-channel Noise (tip/ring; 600
termination):
Psophometric
C-message
3 kHz Flat
Idle-channel Noise ((VTX—VRTX); 600
termination):
Psophometric
C-message
3 kHz Flat
EMC, per EN 300 386-2 and EN61000-4-6 (3 Vrms, 80% mod-
ulation, 105 kHz—80 MHz, 150
source impedance)
3
25
29
—
—
—
—
dB
dB
—
—
—
—
0.3
1
%
%
–291
–300
–309
V/A
1.94
2
2.06
—
–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
25
29
—
—
—
—
dB
dB
—
—
—
—
—
—
–77
13
20
dBmp
dBrnC
dBrn
—
—
—
—
—
—
—
—
–77
13
20
–40
dBmp0
dBrnC0
dBrn0
dBm, 600
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