XE8805AMI028LF Semtech, XE8805AMI028LF Datasheet - Page 101
XE8805AMI028LF
Manufacturer Part Number
XE8805AMI028LF
Description
IC DAS 16BIT FLASH 8K MTP 64LQFP
Manufacturer
Semtech
Datasheet
1.XE8805AMI028LF.pdf
(156 pages)
Specifications of XE8805AMI028LF
Applications
Sensing Machine
Core Processor
RISC
Program Memory Type
FLASH (22 kB)
Controller Series
XE8000
Ram Size
512 x 8
Interface
UART, USRT
Number Of I /o
24
Voltage - Supply
2.4 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
64-LQFP
Supply Voltage Range
2.4V To 5.5V
Operating Temperature Range
-40°C To +85°C
Digital Ic Case Style
LQFP
No. Of Pins
64
For Use With
XE8000MP - PROG BOARD AND PROSTART2 CARD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
XE8805AMI028LF
Manufacturer:
SEMTECH/美国升特
Quantity:
20 000
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As already mentioned, N
16.7.5
The theoretical resolution of the ADC, without considering thermal noise, is given by:
Using look-up Table 16-22 or the graph plotted in Figure 16-6, resolution can be set between 6 and 16 bits. Notice
that, because of 16-bit register use for the ADC output, practical resolution is limited to 16 bits, i.e. n ≤ 16. Even
if the resolution is truncated to 16 bit by the output register size, it may make sense to set OSR and N
higher values in order to reduce the influence of the thermal noise in the PGA (see section 16.8.4).
© Semtech 2006
n
=
Resolution
2
⋅
log
2
(
OSR
Table 16-22. Resolution vs. SET_OSR[2:0] and SET_NELC[1:0] settings
)
+
ELCONV
log
Figure 16-6. Resolution vs. SET_OSR[2:0] and SET_NELC[2:0]
2
(
SET_OSR
N
[2:0]
Table 16-21. Number of elementary conversion settings
must be equal or greater than 2 to reduce internal amplifier offsets.
ELCONV
000
001
010
011
100
101
110
111
(RegAcCfg0[6:5])
SET_NELC[1:0]
)
due to output register size RegAcOut[15:0])
(shaded area: resolution truncated to 16 bits
(Bits)
00
01
10
11
17
15
13
11
9
7
5
000
00
10
12
14
16
16
16
6
8
SET_NELC=
001
010
01
11
13
15
16
16
16
7
9
SET_NELC
11
10
01
00
16-15
SET_OSR
011
# of Elementary
Conversions
N
10
10
12
14
16
16
16
16
ELCONV
100
8
1
2
4
8
101
(-)
11
11
13
15
16
16
16
16
110
9
(Eq. 15)
111
XE8805/05A
www.semtech.com
ELCONV
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