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| 型号： | SX8725CWLTDT |
| 元件分类： | ADC |
| 英文描述： | 2-CH 16-BIT PROPRIETARY METHOD ADC, SERIAL/PARALLEL ACCESS, PDSO12 |
| 封装： | 4 X 4 MM, HALOGEN FREE AND ROHS COMPLIANT, MLPD-12 |
| 文件页数： | 21/68页 |
| 文件大小： | 1718K |
| 代理商： | SX8725CWLTDT |
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Page 28
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8725C
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
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相关代理商/技术参数 |
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|---|---|
| SX8725E083TDT | 功能描述:IC DAS PRESS/TEMP SENS 12MLPD RoHS:是 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:ZoomingADC™ 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| SX8725E083TRT | 功能描述:IC DAS PRESSURE/TEMP SENS 12MLPD RoHS:是 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:ZoomingADC™ 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| SX8725S | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:ZoomingADC for sensing data acquisition ADVANCED COMMUNICATIONS & SENSING |
| SX8725SWLTDT | 制造商:Semtech Corporation 功能描述: 制造商:Semtech Corporation 功能描述:1 INPUTS ZOOMING ADC WITH SPI |
| SX8733 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Precision Diode Digital Temperature For Up To 3 External Sensors |
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