SX8801IRXXMLTRT View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SX8801IRXXMLTRT' PDF : 135 Pages View PDF
XE8801A – SX8801R
SET_NELC[1:0]
(RegAcCfg0[6:5])
00
01
10
11
# of Elementary
Conversions
NELCONV (-)
1
2
4
8
Table 16-21 Number of elementary conversion settings
As already mentioned, NELCONV must be equal or greater than 2 to reduce internal amplifier offsets.
16.7.5 Resolution
The theoretical resolution of the ADC, without considering thermal noise, is given by:
n = 2 ⋅ log2 (OSR) + log2 (N ELCONV ) (Bits)
(Eq. 15)
17
15
SET_NELC= 11
13
10
01
11
00
9
7
5
000 001 010 011 100 101 110 111
SET_OSR
Figure 16-6 Resolution vs. SET_OSR[2:0] and SET_NELC[2:0]
SET_OS
R
[2:0]
000
001
010
011
100
101
110
111
SET_NELC
00
01
10
11
6
7
8
9
8
9
10
11
10
11
12
13
12
13
14
15
14
15
16
16
16
16
16
16
16
16
16
16
16
16
16
16
(shaded area: resolution truncated to 16 bits
due to output register size RegAcOut[15:0])
Table 16-22 Resolution vs. SET_OSR[2:0] and SET_NELC[1:0] settings
© Semtech 2005
16-14
www.semtech.com
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