參數(shù)資料
型號(hào)： T8538B
元件分類： Codec
英文描述： T8538B Quad Programmable Codec
中文描述： T8538B四可編程編解碼器
文件頁數(shù)： 25/44頁
文件大?。?/td> 847K
代理商： T8538B
Agere Systems Inc.
25
Preliminary Data Sheet
August 2001
T8538B Quad Programmable Codec
Electrical Characteristics
(continued)
Analog Interface
The following specifications pertain to the analog SLIC interface for each channel.
Table 7. Analog Interface
Table 8. Power Dissipation
Power measurements are made at BCLK = 2.048 MHz, DCLK = 2.048 MHz, no inputs from serial interface, inter-
face latches set as outputs, outputs unloaded.
Parameter
Symbol
R
VF
X
I
V
VF
X
I
Test Conditions
0.25 < V
IN
< (V
DDX
0.25) V
Relative to ground.
Signal should be capacitively
coupled to VF
X
I.
Min
100
1.4
Typ
—
1.5
Max
300
1.6
Unit
k
V
Input Resistance
dc Input Voltage
Load Resistance at VF
R
OP
and
VF
R
O
N
(differential)
R
L
5-8881F
7.5
—
—
k
Output Resistance
R
O
Digital input code correspond-
ing to idle PCM code (
μ
-law).
Digital input code correspond-
ing to idle PCM code (
μ
-law).
R
L
= 100 k
—
2
10
Output Offset Voltage Between VF
R
OP
and
VF
R
O
N
Output Offset Voltage Between
VF
R
OP
and
VF
R
O
N, Standby Mode
Common-mode Output Voltage, Active
Mode
V
OS
100
0
100
mV
V
OSS
20
0
20
mV
V
OCM
Digital input code correspond-
ing to alternating ± zero
μ
-law
PCM code.
—
1.4
1.5
1.6
V
Common-mode Output Voltage, Standby
Mode
V
OCMS
1.4
1.5
1.6
V
Parameter
Symbol
I
DDS
I
DD1
I
DD1
Test Conditions
—
—
—
Min
—
—
—
Typ
10
100
50
Max
—
—
—
Unit
mW
mW
mW
All Channels in Standby, Dissipation for One Channel
One Channel Active, Dissipation for Active Channel
Four Channels Active, Dissipation for One Channel
R
L
R
L
R
L
R
L
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