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參數(shù)資料
| 型號： | T7570 |
| 廠商： | Lineage Power |
| 元件分類： | Codec |
| 英文描述： | Programmable PCM Codec with Hybrid-Balance Filter(帶混合平衡濾波器的可編程PCM編解碼器) |
| 中文描述： | 可編程PCM編解碼器與混合平衡濾波器（帶混合平衡濾波器的可編程的PCM編解碼器） |
| 文件頁數(shù)： | 16/28頁 |
| 文件大?。?/td> | 489K |
| 代理商： | T7570 |
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16
Lucent Technologies Inc.
T7570 Programmable PCM Codec
with Hybrid-Balance Filter
Data Sheet
October 1996
Transmission Characteristics
(continued)
Table 14. Gain and Dynamic Range
(continued)
Parameter
Symbol
G
XAF
Test Conditions
Relative to 1020 Hz, minimum
gain < G
X
< maximum gain,
D
R
0 or D
R
1 = 0 dBm0 code:
f = 16.67 Hz
f = 50 Hz
f = 60 Hz
f = 200 Hz
f = 300 Hz to 3000 Hz
f = 3140 Hz
f = 3380 Hz
f = 3860 Hz
f
≥
4600 Hz (measured
response at alias frequency
from 0 kHz to 4 kHz)
Sinusoidal test method, refer-
ence level = 0 dBm0:
VF
X
I = –40 dBm0 to +3 dBm0
VF
X
I = –50 dBm0 to –40 dBm0
VF
X
I = –55 dBm0 to –50 dBm0
Receive gain programmed for
maximum 0 dBm0 test level,
applied 0 dBm0 PCM code to
D
R
0 or D
R
1, measured VF
R
O,
T
A
= 25
°
C, load = 10 k
Measured relative to G
RA
, V
DD
=
5 V, minimum gain < G
R
< maxi-
mum gain
Measured receive gain over the
range from maximum to mini-
mum setting, calculated the
deviation from the programmed
gain relative to G
RA
, i.e.,
G
RAG
= G
actual
– G
prog
– G
RA
,
T
A
= 25
°
C, V
DD
= 5 V
T
A
(
°
C)
Min
Typ
Max
Unit
Transmit Gain Variation
with Frequency
—
—
—
—
—
—
—
—
—
—
—
—
–1.8
–0.125
±
0.04
–0.57
–0.885
—
—
–35
–33
–40
–0.5
–30
–30
–30
0
0.125
0.125
0.012
–8.98
–32
dB
dB
dB
dB
dB
dB
dB
dB
dB
0.01
–0.6
–9.9
—
Transmit Gain Variation
with Signal Level
G
XAL
—
—
—
—
–0.2
–0.4
–1.2
–0.15
—
—
—
—
0.2
0.4
1.2
0.15
dB
dB
dB
dB
Receive Gain Absolute
Accuracy
G
RA
Receive Gain
Variation with
Temperature
Receive Gain Variation
with Programmed Gain
G
RAT
–40 to 0
0 to 85
–0.15
–0.1
—
—
0.15
0.1
dB
dB
G
RAG
—
–0.1
—
0.1
dB
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