參數(shù)資料
型號: T8502
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): 5/16頁
文件大?。?/td> 440K
代理商: T8502
Lucent Technologies Inc.
5
Data Sheet
July 1998
T8502 and T8503 Dual PCM Codecs with Filters
Electrical Characteristics
(continued)
dc Characteristics
(continued)
Table 3. Power Dissipation
Power measurements are made at MCLK = 4.096 MHz with outputs unloaded and ASEL and GS[1:0] not
connected. Clock and frame sync levels are +5 V and 0 V.
Transmission Characteristics
Table 4. Analog Interface
Channels
Operational
0
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Standby Current
I
DDS
MCLK present;
FS
X
[1:0] = FS
R
[1:0] = 0 V
MCLK present;
FS pulses present for
one channel,
FS
X
= FS
R
= 0 V for other
channel
MCLK, FS pulses present
5
8
mA
1
Partial Standby Current
I
DDP
10
16
mA
2
Powerup Current
I
DD1
16
23
mA
Parameter
Symbol
R
VF
X
I
I
BVF
X
I
A
VOL
f
O
CL
X1
RL
X1
V
IX
RL
VF
R
O
CL
VF
R
O
RO
VF
R
O
Test Conditions
0.25 V < VF
X
I < 4.75 V
0.25 V < VF
X
I < 4.75 V
Relative to ground
0 dBm0, 1020 Hz PCM code
applied to D
R
Standby mode FS
X
= FS
R
= 0 V for
channel under test
Alternating
±
zero
μ
-law PCM
code applied to D
R
Standby mode FS
X
= FS
R
= 0 V for
channel under test, no load
RL = 2000
Min
1.0
5000
1
10
2.25 2.35
2000
Typ
60
0.04
3
Max
2.4
50
2.5
100
20
Unit
M
μ
A
MHz
pF
k
V
pF
Input Resistance, VF
X
IN
Input Leakage Current, VF
X
IN
dc Open-loop Voltage Gain, GS
X
Open-loop Unity Gain Bandwidth, GS
X
Load Capacitance, GS
X
Load Resistance, GS
X
Input Voltage, VF
X
IN
Load Resistance, VF
R
O
Load Capacitance, VF
R
O
Output Resistance, VF
R
O
3000
10000
Output Voltage, VF
R
O
V
OR
2.25 2.38
2.5
V
Output Voltage, VF
R
O, Standby
VO
RPD
2.0
2.35
2.65
V
Output Voltage Swing, VF
R
O
V
SWR
3.2
Vp-p
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