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參數(shù)資料
| 型號： | T8531 |
| 元件分類： | Codec |
| 英文描述： | T8502 and T8503 Dual PCM Codecs with Filters |
| 中文描述： | T8502和T8503雙的PCM編解碼器與濾波器 |
| 文件頁數(shù)： | 25/48頁 |
| 文件大?。?/td> | 999K |
| 代理商： | T8531 |
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Lucent Technologies Inc.
25
Preliminary Data Sheet
November 2000
Codec Chip Set
T8531/T8532 Multichannel Programmable
Electrical Characteristics
(continued)
dc Characteristics
(continued)
Table 10. T8532 Power Dissipation
Table 11. T8531 Power Dissipation
* Powerup current exhibits a negative temperature coefficient.
Transmission Characteristics
Table 12. Gain and Dynamic Range
Parameter
Powerdown Current
Powerup Current
Symbol
IDD0
IDD1
Test Conditions
Min
—
—
Typ
9
61
Max
12
88
Unit
mA
mA
OSCK and OSFS present, 8 channels powered down
OSCK and OSFS present, 8 channels powered up,
normal operation
Parameter
Powerdown Current
Symbol
IDD0
Test Conditions
Min
—
Typ
50
Max
60
Unit
mA
SCK and SFS present, 16 channels powered down
and inactive
SCK and SFS present, 16 channels powered up and
active
Powerup Current
IDD1
—
85*
100
mA
Parameter
Absolute
Levels
Symbol
GAL
Test Conditions
Min
Typ
Max
Unit
Maximum 0 dBm0 levels (1.02 kHz):
VTX (encoder milliwatt)
(T8532 TX gain = 0 dB; T8531 gain = –1.65 dB)
VRP—VRN (decoder milliwatt)
(T8532 RX gain = 6.02 dB; T8531 gain = 0.21 dB)
Termination impedance off
Minimum 0 dBm0 levels (1.02 kHz):
VTX
(T8532 TX gain =12.04 dB; T8531 gain = –1.65 dB)
VRP—VRN
(T8532 RX gain = –12.04 dB; T8531 gain = 0.21 dB)
Termination impedance off
Transmit gain programmed for maximum
0 dBm0 test level, measured deviation of digital code
from ideal 0 dBm0 level at OSDX[1:0] digital outputs,
with transmit gain set to 0 dB:
0
°
C to 85
°
C
–40
°
C to +85
°
C
Measured transmit gain over the range from maxi-
mum to minimum, calculated deviation from the pro-
grammed gain relative to GXA at 0 dB:
V
DD
= 5 V
—
—
2.23
4.38
—
—
Vp-p
Vp-p
—
—
557.0
548.0
—
—
mVp-p
mVp-p
Transmit Gain
Absolute
Accuracy
GXA
–0.25
–0.30
—
—
0.25
0.30
dB
dB
Transmit Gain
Variation with
Programmed
Gain
GXAG
–0.1
—
0.1
dB
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