參數(shù)資料
型號(hào)： XE8801AMI027LF
廠商： Semtech
文件頁數(shù)： 133/135頁
文件大小： 0K
描述： IC DAS 16BIT FLASH 8K MTP 44LQFP
標(biāo)準(zhǔn)包裝： 800
系列： XE880x
應(yīng)用： 感測機(jī)
核心處理器： Coolrisc816?
程序存儲(chǔ)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： 44-VFQFN 裸露焊盤
包裝： 托盤
供應(yīng)商設(shè)備封裝： 44-MLPQ（7x7）
產(chǎn)品目錄頁面： 585 (CN2011-ZH PDF)
配用： XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
Semtech 2005
www.semtech.com
16-12
XE8801A – SX8801R
16.7
ADC Characteristics
The main performance characteristics of the ADC (resolution, conversion time, etc.) are determined by three
programmable parameters. The setting of these parameters and the resulting performances are described later.
sampling frequency fS,
over-sampling ratio OSR, and
number of elementary conversions NELCONV.
16.7.1
Conversion Sequence
A conversion is started each time the bit START or the bit DEF is set. As depicted in Figure 16-5, a complete analog-
to-digital conversion sequence is made of a set of NELCONV elementary incremental conversions and a final
quantization step. Each elementary conversion is made of (OSR+1) sampling periods TS=1/fS, i.e.:
S
ELCONV
f
OSR
T
/
)
1
(
+
=
(s)
(Eq. 12)
The result is the mean of the elementary conversion results. An important feature is that the elementary conversions
are alternatively performed with the offset of the internal amplifiers contributing in one direction and the other to the
output code. Thus, converter internal offset is eliminated if at least two elementary sequences are performed (i.e. if
NELCONV ≥ 2). A few additional clock cycles are also required to initiate and end the conversion properly.
Conversion index
Offset
T
ELCONV= (OSR+1)/f S
Elementary
Conversion
1
+
Elementary
Conversion
2
-
Elementary
Conversion
N
ELCONV- 1
+
Elementary
Conversion
N
ELCONV
-
Init
End
T
CONV
Conversion
Result
Figure 16-5 Analog-to-digital conversion sequence
16.7.2
Sampling Frequency
The word FIN[1:0] is used to select the sampling frequency fS (Table 16-19). Three sub-multiples of the internal
RC-based frequency fRCEXT can be chosen. For FIN = "11", sampling frequency is about 8kHz. Additional information
on oscillators and their control can be found in the clock block documentation.
Sampling Frequency fS (Hz)
FIN[1:0]
XE8801A, SX8801
and XE8805A
XE8802
00
1/4
f
RC
1/8
f
RCEXT
01
1/8
f
RC
1/16
f
RCEXT
10
1/32
f
RC
1/64
f
RCEXT
11
8kHz
4kHz
Table 16-19 Sampling frequency settings (fRC or fRCEXT is the RC oscillator frequency)
Not
Recommended
for
New
Designs
相關(guān)PDF資料
PDF描述
X28HC256JIZ-15T1 IC EEPROM 256KBIT 150NS 32PLCC
MR25H10CDCR IC MRAM 1MBIT 40MHZ 8DFN
X28HC256JZ-15T1 IC EEPROM 256KBIT 150NS 32PLCC
MR256A08BCMA35R IC MRAM 256KB 35NS 48BGA
MR256A08BYS35R IC MRAM 256KB 35NS 44TSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XE8802 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Sensing Machine Data Acquisition MCU
XE8802MI000 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Sensing Machine Data Acquisition MCU
XE8802MI035LF 功能描述:IC DAS 16BIT FLASH 8K 100-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器 - 特定應(yīng)用 系列:XE880x 產(chǎn)品變化通告:Product Discontinuation 26/Aug/2009 標(biāo)準(zhǔn)包裝:250 系列:- 應(yīng)用:網(wǎng)絡(luò)處理器 核心處理器:4Kc 程序存儲(chǔ)器類型:- 控制器系列:- RAM 容量:16K x 8 接口:以太網(wǎng)，UART，USB 輸入/輸出數(shù):- 電源電壓:1.8V, 3.3V 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:208-LQFP 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:PG-LQFP-208 其它名稱:SP000314382
XE8805 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Data Acquisition MCU
XE8805AMI000 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Data Acquisition MCU
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*