參數(shù)資料
型號： AD1821
廠商： Analog Devices, Inc.
元件分類： Codec
英文描述： MODIO(Modem over Audio) SoundComm Host Signal Processing Codec(音頻調(diào)制SoundComm型主信號處理編解碼器)
中文描述： MODIO（調(diào)制解調(diào)器多音頻）SoundComm主機信號處理編解碼器（音頻調(diào)制SoundComm型主信號處理編解碼器）
文件頁數(shù)： 10/44頁
文件大?。?/td> 284K
代理商： AD1821
AD1821
–10–
REV. 0
PIN FUNCT ION DE SCRIPT IONS
Analog Signals
Pin Name
PQFP
I/O
Description
MIC
44
I
Microphone Input. T he MIC input may be either line-level or –20 dB from line-level (the
difference being made up through a software controlled 20 dB gain block). T he mono MIC
input may be sent to the left and right channel of the ADC for conversion, or gained/
attenuated from +12 dB to –34.5 dB in 1.5 dB steps and then summed with left and right
line OUT before the Master Volume stage.
Left Line-Level Input. T he left line-level input may be: sent to the left channel of the
ADC; gained/attenuated from +12 dB to –34.5 dB in 1.5 dB steps and then summed with
left line OUT .
Right Line-Level Input. T he right line-level input may be: sent to the right channel of the
ADC; gained/attenuated from +12 dB to –34.5 dB in 1.5 dB steps and then summed with
right line OUT .
Left Synthesizer Input. T he left MIDI upgrade line-level input may be: sent to the left
channel of the ADC; gained/attenuated from +12 dB to –34.5 dB in 1.5 dB steps and then
summed with left line OUT .
Right Synthesizer Input. T he right MIDI upgrade line-level input may be: sent to the right
channel of the ADC; gained/attenuated from +12 dB to –34.5 dB in 1.5 dB steps and then
summed with right line OUT .
Left CD Line-Level Input. T he left CD line-level input may be: sent to the left channel of
the ADC; gained/attenuated from +12 dB to –34.5 dB in 1.5 dB steps and then summed
with left line OUT .
Right CD Line-Level Input. T he right CD line-level input may be: sent to the right chan-
nel of the ADC; gained/attenuated from +12 dB to –34.5 dB in 1.5 dB steps and then
summed with right line OUT .
Left Video Input. T he left audio track for a video line-level input may be: sent to the left
channel of the ADC; gained/attenuated from +12 dB to –34.5 dB in 1.5 dB steps and then
summed with left line OUT .
Right Video Input. T he right audio track for a video line-level input may be: sent to the
right channel of the ADC; gained/attenuated from +12 dB to –34.5 dB in 1.5 dB steps and
then summed with right line OUT .
Left Output. Left channel line-level post-mixed output. T he final stage passes through the
Master Volume block and may be attenuated 0 dB to –45 dB in 1.5 dB steps.
Modem Output/Right Output. Right channel line-level post-mixed output. T he final stage
passes through the Master Volume block and may be attenuated 0 dB to –45 dB in 1.5 dB
steps.
Modem Input/Phone Input. Line-level input from a DAA/modem chipset.
L_LINE
42
I
R_LINE
41
I
L_SYNT H
46
I
R_SYNT H
45
I
L_CD
48
I
R_CD
47
I
L_VID
32
I
R_VID
31
I
L_OUT
30
O
MDM_OUT /
R_OUT
29
O
MDM_IN/
PHONE_IN
PHONE_OUT
RX 3D
CX 3D
43
I
28
26
27
O
O
I
Phone Output. Line-level output from a DAA/modem chipset.
Phat * Stereo Phase Expander filter network, resistor pin.
Phat * Stereo Phase Expander filter network, capacitor pin.
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