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參數(shù)資料
| 型號： | T7502 |
| 元件分類： | Codec |
| 英文描述： | T7502 Dual PCM Codec with Filters |
| 中文描述： | T7502雙PCM編解碼器與濾波器 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大小： | 417K |
| 代理商： | T7502 |
8
Lucent Technologies Inc.
Data Sheet
February 1998
T7502 Dual PCM Codec with Filters
Transmission Characteristics
(continued)
ac Transmission Characteristics
(continued)
Table 9. Noise
Table 10. Receive Gain Relative to Gain at 1.02 kHz
Table 11. Transmit Gain Relative to Gain at 1.02 kHz
Parameter
Symbol
N
Xp
N
Rp
N
RS
Test Conditions
Input amplifier gain = 36 dB
PCM code is A-law positive one.
f = 0 kHz—100 kHz,
VF
X
IN = 0 Vrms, measurement at
VF
R
O, D
R
= D
X
V
DD
= 5.0 Vdc + 100 mVrms:
f = 0 kHz—4 kHz
f = 4 kHz—50 kHz
PCM code is positive one LSB.
V
DD
= 5.0 Vdc + 100 mVrms:
f = 0 kHz—4 kHz
f = 4 kHz—25 kHz
f = 25 kHz—50 kHz
0 dBm0, 300 Hz—3400 Hz input
PCM code applied:
4600 Hz—7600 Hz
7600 Hz—8400 Hz
8400 Hz—50 kHz
Min
—
—
—
Typ
–68.5
–82
—
Max
–68
–75
–53
Unit
dBm0p
dBm0p
dBm0
Transmit Noise, A-Law
Receive Noise, A-Law
Noise, Single Frequency
Power Supply Rejection Transmit
PSR
X
36
30
—
—
—
—
dB
dB
Power Supply Rejection Receive
PSR
X
36
40
30
—
—
—
—
—
—
dB
dB
dB
Spurious Out-of-Band Signals at
VF
R
O Relative to Input
SOS
—
—
—
—
—
—
–30
–40
–30
dB
dB
dB
Frequency (Hz)
Below 3000
3140
3380
3860
4600 and above
Min
–0.150
–0.570
–0.735
—
—
Typ
±
0.04
±
0.04
–0.50
–10.70
—
Max
0.150
0.150
0.010
–9.400
–28
Unit
dB
dB
dB
dB
dB
Frequency (Hz)
16.67
40
50
60
200
300 to 3000
3140
3380
3860
4600 and above
Min
—
—
—
—
–1.800
–0.150
–0.570
–0.735
—
—
Typ
–50
–34
–36
–50
–0.5
±
0.04
±
0.04
–0.50
–10.70
—
Max
–30
–26
–30
–30
0
0.150
0.150
0.010
–9.400
–32
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
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