SL20T0081 View Datasheet(PDF) - System Logic Semiconductor
Part Name
Description
MFG CO.
'SL20T0081' PDF : 56 Pages View PDF
SLS System Logic Semiconductor
SL20T0081
In Case of Using Internal Resistors, Ra and Rb (INTRS = “H”)
When INTRS pin is “H”, resistor Ra is connected internally between VR pin and VSS, and Rb is connected between
V0 and VR. We determine V0 by two instructions, “Regulator Resistor Select” and “Set Reference Voltage”.
Table 11. Internal Rb/Ra ratio depending on 3-bit data (R2 R1 R0)
R2 R1 R0
000
001
010
011
100
1 + ( Rb/Ra )
3.0
3.5
4.0
4.5
5.0
101
5.5
110
6.0
111
6.4
The following figure shows V0 voltage measured by adjusting internal regulator resistor ratio (Rb/Ra) and 6-bit
electronic volume registers for each temperature coefficient at Ta = 25oC.
Figure 11. Electronic Volume Level
V0[V]
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
0
8
16
24
32
40
48
56
Electronic Volume level
R2 R1 R0
(1 1 1)
(1 1 0)
(1 0 1)
(1 0 0)
(0 1 1)
(0 1 0)
(0 0 1)
(0 0 0)
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