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參數(shù)資料
| 型號(hào)： | AM79Q062JC |
| 廠(chǎng)商： | ADVANCED MICRO DEVICES INC |
| 元件分類(lèi)： | 編解碼器 |
| 英文描述： | A/MU-LAW, PCM CODEC, PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁(yè)數(shù)： | 4/95頁(yè) |
| 文件大?。?/td> | 1399K |
| 代理商： | AM79Q062JC |
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Am79Q06/061/062/063 Data Sheet
Power Supply for the Am79Q06X
AGND
Analog Ground
DGND
Digital Ground
VCCA
+5 V Analog Power Supply
VCCD
+5 V Digital Power Supply
Two separate power supply inputs allow for noise
isolation a nd prop er powe r supp ly decou pling
technique s; h oweve r, the t wo pins h ave a low
impedance connection inside the par t. For best
performance, connect all of the +5 V power supply pins
together at the connector of the printed circuit board,
and all of the grounds should be connected together at
the connector of the printed circuit board.
VIN1–VIN4
Inputs
Analog. The analog voice band signal is applied to the VIN input of the QSLAC device. The VIN
input is biased at VREF by a large internal resistor. The audio signal is sampled, digitally pro-
cessed and encoded, and then made available at the TTL-compatible PCM output (DXA or DXB)
or in the B1 and B2 of the GCI channel. If the digitizer saturates in the positive or negative direc-
tion, VIN is pulled by a reduced resistance toward AGND or VCCD, respectively. VIN1 is the input
for Channel 1, VIN2 is the input for Channel 2, VIN3 is the input for Channel 3, and VIN4 is the
input for Channel 4.
VOUT1–VOUT4 Outputs Analog. The received digital data at DRA/DRB or DD (GCI mode) is processed and converted to
an analog signal at the VOUT pin. VOUT1 is the output from Channel 1, VOUT2 is the output for
Channel 2, VOUT3 is the output from Channel 3, and VOUT4 is the output for Channel 4. The
VOUT voltages are referenced to VREF.
VREF
Output
Analog Voltage Reference. The VREF output is provided in order for an external 0.1 F capacitor
to be connected from VREF to ground, filtering noise present on the internal voltage reference.
VREF is buffered before it is used by internal circuitry. The voltage on VREF is nominally 2.1 V,
and the output resistance is 100 k
±30%. The leakage current in the capacitor must be less than
20 nA.
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