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IC-Innenschaltbilder und Beschreibung
IC 501 LC 7881 (16-Bit-D/A Converter)
TSTI
Test
Circuit
~
un
~ ~
Tstour
GND v0O
vOD GNO
(Symbol)
CHIOUT
VrefH
put Terminal! of CH-1.
Input Terminal of Reference Voltage "H"
+5V Power Supply Terminal.
r Input Terminal of Word-Clock2.
When IF isin "t", internal signal for latching
CH-1 data of digital signal is made by using
trailing edge WCLK2.
When IF isin "H", it needs WCLK2 to "L" .
Input Terminal of LR Clock.
Indicates CH-1 and CH-2 of input digital audio
data : indicate CH-1 when LRCK isin "H" .
indicate CH-2 when LRCK isin "L" .
input Terminal of Word-Clock1.
When IF is in "L", internal signal for latching
CH-2 data of digital signal is made by using
trailing edge of WCLK1.
When IF is in "H", internal signal for latching
CH-1 and CH-2 data of digital signal is made
by trailing edge of WCLK1.
Input Terminal of Digital Audio Data.
When IF is in "L?, digital audio data is input in
bit serial from LSB.
When IF is in "H", digital audio data is input in
bit serial from MSB.
Bit-Clock Terminal.
This clock is for reading digital audio data into
LS! in bit serial and is for PWMDAC.
D
+5V Power Supply
Terminal.
STOUT
| Output Terminal for Testing.
Ordinarily, leave this terminal open.
71
Input Terminal for Testing.
Ordinarily,
ground these terminals.
ST2
Input Terminal for Testing.
Ordinarily,
ground these terminals.
Interface Select Terminal.
When IF isin
"L", digital audio data is input
from LSB side.
When IF is in "H", digital audio data is input
from MSB side.
Ground Terminat
input Terminal of Reference Voltage
"L" .
vod
WCLK2
LRCK °
2 3
ie) 3
:
@
7 | WCLK1
DATA
< a iv]
fo)
re x
~
—
+ n
i
1.17 [GND [Ground Tremint
| 18 [NC
| NoConnection
| i9 [NC [| Noconnection
16
IC Block Diagram and Description
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