參數(shù)資料
型號(hào): T8531A
元件分類(lèi): Codec
英文描述: T8531A/8532 Multichannel Programmable Codec Chip Set
中文描述: T8531A/8532多通道可編程解碼器芯片組
文件頁(yè)數(shù): 26/50頁(yè)
文件大?。?/td> 888K
代理商: T8531A
26
Agere Systems Inc.
Preliminary Data Sheet
September 2001
Codec Chip Set
T8531A/T8532 Multichannel Programmable
Electrical Characteristics
(continued)
dc Characteristics
(continued)
Table 10. T8532 Power Dissipation
Table 11. T8531A 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; T8531A gain = –1.65 dB)
VRP—VRN (decoder milliwatt)
(T8532 RX gain = 6.02 dB; T8531A gain = 0.21 dB)
Termination impedance off
Minimum 0 dBm0 levels (1.02 kHz):
VTX
(T8532 TX gain =12.04 dB; T8531A gain = –1.65 dB)
VRP—VRN
(T8532 RX gain = –12.04 dB; T8531A 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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