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參數(shù)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(shù)： | 4/21頁 |
| 文件大小： | 161K |
| 代理商： | W6612 |
W6612
- 4 -
4.1. Power Control Interface, continued
PIN NAME
PIN NO.
I/O
FUNCTION
VAA2
5
I
This pin is the second analog power supply at 5 volt. This pin
should be decoupled to GNDA2 with a 0.1
μ
F capacitor.
This pin connects the first analog ground and is typically connected
to 0 volt.
GNDA1
1
I
GNDA2
10
I
This pin connects the second analog ground and is typically
connected to 0 volt.
VAG
6
O
This is the analog signal reference ground output pin which
supplies a 2.5 volt reference voltage for all analog signal
processing. This pin should be decoupled to GNDA1 with 0.1
μ
F
capacitor. This pin becomes high impedance when the chip enters
an analog power down mode.
4.2. Analog Interface
PIN NAME
PIN NO.
I/O
FUNCTION
TG1
2
O
This pin is the analog output of the first transmit input amplifier. It
can be used to set the gain by external resistors. When the chip is
in analog power down mode, this pin is high impedance.
T1-
3
I
This pin is the inverting input of the first transmit input amplifier.
T1+
4
I
The non-inverting input of the first transmit input amplifier. Note
this pin may be connected to the VAG pin for an inverting
configuration if the input signal is referenced to the VAG pin.
TG2
9
O
This pin is the analog output of the second transmit input amplifier.
It can be used to set the gain by external resistors. When the chip
is in analog power down mode, this pin is high impedance.
T2-
8
I
This pin is the inverting input of the second transmit input amplifier.
T2+
7
I
The non-inverting input of the second transmit input amplifier. Note
this pin may be connected to the VAG pin for an inverting
configuration if the input signal is referenced to the VAG pin.
RO1
44
O
This pin is the first non-inverting analog output of the receive
smoothing filter. This pin can typically drive a 2K
load to 1.579
volt peak referenced to the analog ground level.
This pin is the first inverting input to the PO1- power amplifier. It is
dc referenced to the VAG pin. This pin and PO1- are used to set
the gain by using external resistors.
This pin is the first inverting power amplifier output. This pin can
drive the a 300
load to 1.579 volt peak referenced to the VAG
pin.
PI1
43
I
PO1-
42
O
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