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SLG46721 Datasheet(PDF) 76 Page - Dialog Semiconductor

Part # SLG46721
Description  Logic & Mixed Signal Circuits
PDF  101 Pages
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Manufacturer  DIALOG [Dialog Semiconductor]
Direct Link  http://www.dialog-semiconductor.com/
Logo DIALOG - Dialog Semiconductor

SLG46721 Datasheet(HTML) 76 Page - Dialog Semiconductor

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SLG46721
17.0 Voltage Reference (VREF)
17.1 Voltage Reference Overview
The SLG46721 has a Voltage Reference Macrocell to provide references to the four analog comparators. This macrocell can
supply a user selection of fixed voltage references, /3 and /4 reference off of the VDD power supply to the device, and externally
supplied voltage references from pins 7,12 and 14. The macrocell also has the option to output reference voltages on pins 18
and 19. See table below for the available selections for each analog comparator. Also see Figure 39 below, which shows the
reference output structure.
17.2 VREF Selection Table
Table 66. VREF Selection Table.
SEL<4:0>
CMP0_VREF
CMP1_VREF
CMP2_VREF
CMP3_VREF
11011
vref_ext_acmp0
vref_ext_acmp1
vref_ext_acmp2
vref_ext_acmp2
11010
vref_ext_acmp1
vref_ext_acmp1
vref_ext_acmp1
vref_ext_acmp1
11001
VDD / 4
VDD / 4
VDD / 4
VDD / 4
11000
VDD / 3
VDD / 3
VDD / 3
VDD / 3
10111
1.20
1.20
1.20
1.20
10110
1.151.151.151.15
10101
1.10
1.10
1.10
1.10
10100
1.05
1.05
1.05
1.05
10011
1.001.001.001.00
10010
0.95
0.95
0.95
0.95
10001
0.90
0.90
0.90
0.90
10000
0.85
0.85
0.85
0.85
01111
0.80
0.80
0.80
0.80
01110
0.750.750.750.75
01101
0.70
0.70
0.70
0.70
01100
0.65
0.65
0.65
0.65
01011
0.600.600.600.60
01010
0.55
0.55
0.55
0.55
01001
0.50
0.50
0.50
0.50
01000
0.45
0.45
0.45
0.45
00111
0.40
0.40
0.40
0.40
00110
0.350.350.350.35
00101
0.30
0.30
0.30
0.30
00100
0.25
0.25
0.25
0.25
00011
0.200.200.200.20
00010
0.15
0.15
0.15
0.15
00001
0.10
0.10
0.10
0.10
00000
0.05
0.05
0.05
0.05
VDD
Practial VREF Range
Note
2.0 V - 5.5 V
50 mV ~1.2 V
1.7 V - 2.0V
50 mV ~1.1 V
Higher than 1.1 V negative input, the comparator may show wrong result



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