Sharp 1-BIT AMPLIFIER SM-SX1 Service Manual page 46

SM-SX1/SX1W
ICA1 RH-iX2815AFZZ: 7th Order Modulation Conversion LSI (IX2815AF)
Pin No. Port Name Input/Output
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
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— 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(–)
24
21 RESET
20 Rch IN
Rch Vref
19
18 Lch Vref
17
Lch IN Amplitude Doubling
16
GNDA
1
15 NFL2(–)
14
NFL1(+)
13
TEST
Figure 46 BLOCK DIAGRAM OF IC
Function
23 22 21 20 19
Lch 7th order
Modulation Circuit
Comparator
Amplitude Doubling
Converter
Converter
2 3 4 5 6
– 46 –
18 17 16 15 14
Rch 7th order
Modulation Circuit
Comparator
Oscillator
7 8 9 10 11
13
12