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參數資料
| 型號： | W6612 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 編解碼器 |
| 英文描述： | Dual PCM Codec(雙通道PCM編解碼器) |
| 中文描述： | A/MU-LAW, PCM CODEC, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數： | 12/21頁 |
| 文件大小： | 161K |
| 代理商： | W6612 |
W6612
- 12 -
6.5. I/O Level
Digital I/O for the device can be programmed in either Mu-law or A-law for Log-PCM mode. Full scale
and zero words for these two Log-PCM forms are shown in Table 6-2. For analog signal processing,
the maximum transmit level is 3.17 dBm0 for Mu-Law or 3.14 dBm0 for A-Law. These values meet
the CCITT G.711specifications.
MU-LAW
Segment Bits
000
111
111
000
A-LAW
Level
Sign
1
1
0
0
Step Bits
0000
1111
1111
0000
Sign
1
1
0
0
Segment Bits
010
101
101
010
Step Bits
1010
0101
0101
1010
+ max. scale
+Zero
- Zero
- max. scale
Table 6-2 Full Scale and Zero Word for Mu/A-Law
7. ELECTRICAL CHARACTERISTICS
7.1. Absolute Maximum Ratings
(Voltage Referenced to GNDA1, GNDA2, and GNDD pin)
PARAMETER
SYMBOL
VAA1, VAA2, V
DD
---
---
T
OP
T
STG
RATING
-0.3 to 6.0
UNIT
V
V
V
°
C
°
C
Power Supply Voltage
Analog Input/Output Voltage
Digital Input/Output Voltage
Operating Temperature
Storage Temperature
-0.3 to VAA1(VAA2) + 0.3
-0.3 to V
DD
+0.3
-40 to +85
-85 to +85
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.
7.2. DC Characteristics
(GNDA1 = GNDA2 = GNDD = 0 volt ; T
OP
= -40 to +85
°
C)
PARAMETER
SYM.
CONDITION
MIN.
TYP.
MAX.
UNI
T
V
mA
Operating Voltage
Operating Current
VDD, VAA1, VAA2
----
MCLK = 2.048 MHz, no
load (VAA1 = VAA2 = 5V)
MCLK/PDI Off, no load
4.75
---
5.0
19
5.25
--
Iop
Power Down Current
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Input High Current
Input Low Current
I
PWDN
V
IH
V
IL
V
OH
V
OL
I
IL
I
IH
---
---
---
----
----
---
---
---
0.3
-----
0.5
-----
0.4
+10
+10
mA
V
V
V
V
μ
A
μ
A
All digital input pins
All digital input pins
DT1, DT2
DT1, DT2
GNDD
≤
Vin
≤
V
DD
GNDD
≤
Vin
≤
V
DD
V
DD -0.5
0
V
DD -0.5
0
-10
-10
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