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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： | 53/68页 |
| 文件大小： | 1718K |
| 代理商： | SX8725CWLTDT |
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Page 57
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
SX8725C
ZoomingADC for sensing data acquisition
Revision 1.01
January 2011
Semtech
11.5 Gain Error and Offset Error
Gain error is defined as the amount of deviation between the ideal transfer function (theoretical Equation 19, page
33) and the measured transfer function (with the offset error removed).
The actual gain of the different stages can vary depending on the fabrication tolerances of the different elements.
Although these tolerances are specified to a maximum of ±3%, they will be most of the time around ±0.5%. Moreover,
the tolerances between the different stages are not correlated and the probability to get the maximal error in the same
direction in all stages is very low. Finally, these gain errors can be calibrated by the software at the same time with the
gain errors of the sensor for instance.
Figure 49 shows gain error drift vs. temperature for different PGA gains. The curves are expressed in % of Full-Scale
Range (FSR) normalized to 25°C.
Offset error is defined as the output code error for a zero volt input (ideally, output code = 0). The offset of the ADC and
the PGA1 stage are completely suppressed if NELCONV > 1.
The measured offset drift vs. temperature curves for different PGA gains are depicted in Figure 50. The output offset
error, expressed in LSB for 16-bit setting, is normalized to 25°C. Notice that if the ADC is used alone, the output offset
error is below +/-1 LSB and has no drift.
Figure 49. Gain Error vs. Temperature for Different Gains
Figure 50. Offset Error vs. Temperature for Different Gains
NORMALIZED TO 25°C
-0.4
-0.3
-0.2
-0.1
0.0
0.1
0.2
-50
-25
0
25
50
75
100
Temperature [°C]
Ga
in
Er
ro
r
[%
o
fF
S
R
]
1
5
20
100
NORMALIZED TO 25°C
-40
-20
0
20
40
60
80
100
-50
-25
0
25
50
75
100
Temperature [°C]
O
ut
pu
tO
ffs
et
E
rr
or
[L
S
B
]
1
5
20
100
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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