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參數(shù)資料
| 型號： | SX8723CWLTDT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 21/67頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS ADC 16BIT I2C/SRL |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | ZoomingADC™ |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS） |
| 輸入類型： | 差分 |
| 輸出類型： | 數(shù)字 |
| 接口： | I²C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 12-WFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 12-MLPD-EP（4x4） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | SX8723CWLTDTDKR |
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Page 28
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8723C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
7.7 Analog-to-Digital Converter (ADC)
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.
fs :Over-sampling frequency
OSR :Over-Sampling Ratio
NELCONV :
Number of Elementary Conversions
7.7.1 Conversion Sequence
A conversion is started each time the bit Start or the Def bit is set. As depicted in Figure 14, 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) over-sampling periods Ts=1/fs, i.e.:
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.
Equation 13
Figure 14. Analog-to-Digital Conversion Sequence
Note
The internal bandgap reference state may be forced High or Low, or may be set
to toggle during conversion at either the same rate or half the rate of the
Elementary Conversion. This may be useful to help eliminate bandgap related
internal offset voltage and 1/fs noise.
]
[
/
)
1
(
s
f
OSR
T
S
ELCONV
+
=
Init
Elementary
Conversion
Elementary
Conversion
Elementary
Conversion
Elementary
Conversion
End
Conversion index
Offset
12
N
ELCONV-1
N
ELCONV
Conversion
Result
+-
+
-
T
CONV
Not
Recommended
New
Designs
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| SX8723E083TDT | 功能描述:IC DAS PRESS/TEMP SENS 12MLPD RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:ZoomingADC™ 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 |
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| SX8723S | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:ZoomingADC for sensing data acquisition |
| SX8723SWLTDT | 制造商:Semtech Corporation 功能描述:2 INPUTS ZOOMING ADC WITH SPI |
| SX8724 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:ZoomingADC? for Pressure and Temperature Sensing |
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