NsOrder=2, fRC=2MHz, Fin=0, LpOrder=2
參數(shù)資料
型號: XE8805AMI028LF
廠商: Semtech
文件頁數(shù): 33/156頁
文件大?。?/td> 0K
描述: IC DAS 16BIT FLASH 8K MTP 64LQFP
標(biāo)準(zhǔn)包裝: 160
系列: XE880x
應(yīng)用: 感測機
核心處理器: Coolrisc816?
程序存儲器類型: 閃存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
輸入/輸出數(shù): 24
電源電壓: 2.4 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
包裝: 托盤
供應(yīng)商設(shè)備封裝: 64-LQFP(10x10)
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
Semtech 2006
www.semtech.com
18-7
XE8805/05A
NsOrder=2, fRC=2MHz, Fin=0, LpOrder=2
Resolution
PWM modulation m
(bit)
456
789
10
11
8
5638.4
3906.3
1953.1
976.6
488.3
244.1
122.1
61.0
9
3986.9
2762.1
1381.1
690.5
345.3
172.6
86.3
43.2
10
2819.2
1953.1
976.6
488.3
244.1
122.1
61.0
30.5
11
1993.5
1381.1
690.5
345.3
172.6
86.3
43.2
21.6
12
1409.6
976.6
488.3
244.1
122.1
61.0
30.5
15.3
13
996.7
690.5
345.3
172.6
86.3
43.2
21.6
10.8
14
704.8
488.3
244.1
122.1
61.0
30.5
15.3
7.6
15
498.4
345.3
172.6
86.3
43.2
21.6
10.8
5.4
16
352.4
244.1
122.1
61.0
30.5
15.3
7.6
3.8
Table 18-7. Low pass cut-off frequency as a function of the selected MPW modulation and required resolution for a
second order noise shaper.
The output range of the D/A is for code 0h0000 is VSS and for code 0hFFFF is (VBAT-VSS)(2
m-1)/2m.
18.5
Amplifier
The amplifier can be used to implement the low pass filter and/or a 4-20mA loop. The amplifier is enabled using the
bit Enable(1)=1. The amplifier has two different modes selected by the bit BW: a low frequency mode (BW=0) that
allows driving a high capacitive load and a high frequency mode (BW=1).
The first mode is particularly adapted when a voltage output is used. The second mode is more adapted for a 4-
20mA loop since loads are small and higher bandwidth is required to reject current consumption changes in the
loop.
Table 18-8 shows the specification of the amplifier.
Note that the amplifier can not be used to generate signals that are larger than the supply voltages VBAT and VSS
since the amplifier inputs and outputs are clamped to these voltages. The amplifier inputs and outputs should stay
within the input and output ranges specified below.
Not
Recommended
for
New
Designs
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