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Sharp SM-SX1 Service Manual page 46

1-bit amplifier
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SM-SX1/SX1W
ICA1 RH-iX2815AFZZ: 7th Order Modulation Conversion LSI (IX2815AF)
Pin No.
Port Name
1
VDDR
2
OUTL (+)
3
OUTL (–)
4
GNDD
5
OUTR (–)
6
OUTR (+)
7
VDDL
8
VDDX
9
XI
10
XO
11
GNDX
12*
MCK
13
TEST
14
NFL1 (+)
15
NFL2 (–)
16
GNDA
17
L-CH IN
18
L-CH Vref
19
R-CH Vref
20
R-CH IN
21
RESET
22
NFR2 (–)
23
NFR1 (+)
24
VDA
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
1
VDDR
2
OUTR(+)
3
OUTR(–)
4
GNDD
5
OUTL(–)
6
OUTL(+)
7
VDDL
VDDX
8
9
XI
10
XO
11
GNDX
12
MCK
Input/Output
R channel digital output section power terminal
Output
R channel forward output terminal
Output
R channel reverse output terminal
Digital output section ground terminal
Output
L channel reverse output terminal
Output
L channel forward output terminal
L channel digital output section power terminal
Oscillation section power terminal
Input
Quartz oscillator connection terminal. Clock necessary for the system is generated.
Output
Quartz oscillator connection terminal. Clock necessary for the system is generated.
Oscillation section ground terminal
Output
System clock output terminal
Input
Test terminal. As usual, it is used at "L".
Input
L channel forward signal feedback input terminal
Input
L channel reverse signal feedback input terminal
Analog ground terminal for AD converter
Input
L channel analog input terminal
Reference voltage terminal for L channel
Reference voltage terminal for R channel
Input
R channel analog input terminal
Input
Reset terminal. It is reset with "L".
Input
R channel reverse signal feedback input terminal
Input
R channel forward signal feedback input terminal
Analog current terminal for AD converter
24
VDDA
23
NFR1(+)
22
NFR2(–)
21
RESET
20
Rch IN
19
Rch Vref
18
Lch Vref
17
Lch IN
16
GNDA
15
NFL2(–)
14
NFL1(+)
13
TEST
Figure 46 BLOCK DIAGRAM OF IC
Function
24
23
22
21
20
Lch 7th order
Modulation Circuit
Comparator
Amplitude Doubling
Amplitude Doubling
Converter
Converter
1
2
3
4
5
– 46 –
19
18
17
16
15
Rch 7th order
Modulation Circuit
Comparator
Oscillator
6
7
8
9
10
14
13
11
12

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