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参数资料
| 型号： | M7705 |
| 厂商： | OKI SEMICONDUCTOR CO., LTD. |
| 元件分类： | Codec |
| 英文描述： | 4ch Single Rail CODEC |
| 中文描述： | 4路单铁编解码器 |
| 文件页数： | 4/20页 |
| 文件大小： | 144K |
| 代理商： | M7705 |
Semiconductor
MSM7705-01/02/03
4/20
PIN AND FUNCTIONAL DESCRIPTIONS
AIN1, AIN2, AIN3, AIN4, GSX1, GSX2, GSX3, GSX4
AIN1, AIN2, AIN3, and AIN4 are the transmit analog inputs for channels 1, 2, 3 and 4
respectively.
GSX1, GSX2, GSX3, and GSX4 are the transmit level adjustments for channels 1, 2, 3 and 4
respectively.
AIN1, AIN2, AIN3, and AIN4 are connected to the inverting inputs for the op-amps. GSX1, GSX2,
GSX3, and GSX4 are connected to the outputs for the op-amps. They are used to adjust levels as
shown below, and are connected to the outputs of the op-amps.
During power saving mode and power down mode, the GSX1, GSX2, GSX3, and GSX4 outputs
are at 0 V.
When these pins are not used, connect AIN1 to GSX1, AIN2 to GSX2, AIN3 to GSX3, and AIN4
to GSX4.
CHn
Analog Input
+
–
AINn
C1n
R1n
R2n
GSXn
CHn Gain
Gain = R2n/R1n
￡
10
R1n: Variable
R2n
>
20 k
W
C1n
>
1/(2
￥
3.14
￥
30
￥
R1n) (F)
AOUT1, AOUT2, AOUT3, AOUT4
AOUT1, AOUT2, AOUT3, and AOUT4 are the receive filter outputs for channels 1, 2, 3, and 4
respectively.
When the digital signal of +3 dBm0 is input to DIN1, DIN2, DIN3, and DIN4, the output signal
has an amplitude of 3.4 V
PP
above and below the signal ground voltage (SG : 1/2 V
DD
). The
output can drive a load of 600
W
or more.
During power saving or power down mode, these outputs are at the voltage level of SG with a
high impedance.
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