SX8801IRXXMLTRT View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SX8801IRXXMLTRT' PDF : 135 Pages View PDF
XE8801A – SX8801R
16. Acquisition Chain
16.1
ZoomingADC™ Features .................................................................................................................... 16-2
16.2
Overview .............................................................................................................................................. 16-2
16.3
Register map ....................................................................................................................................... 16-3
16.4
16.4.1
16.4.2
16.4.3
ZoomingADC™ Description................................................................................................................ 16-4
Acquisition Chain .................................................................................................................................. 16-4
Peripheral Registers.............................................................................................................................. 16-6
Continuous-Time vs. On-Request ......................................................................................................... 16-7
16.5
Input Multiplexers ............................................................................................................................... 16-8
16.6
16.6.1
16.6.2
16.6.3
16.6.4
Programmable Gain Amplifiers.......................................................................................................... 16-9
PGA & ADC Enabling.......................................................................................................................... 16-10
PGA1 .................................................................................................................................................. 16-10
PGA2 .................................................................................................................................................. 16-11
PGA3 .................................................................................................................................................. 16-11
16.7
16.7.1
16.7.2
16.7.3
16.7.4
16.7.5
16.7.6
16.7.7
16.7.8
ADC Characteristics ......................................................................................................................... 16-12
Conversion Sequence......................................................................................................................... 16-12
Sampling Frequency ........................................................................................................................... 16-12
Over-Sampling Ratio........................................................................................................................... 16-13
Elementary Conversions ..................................................................................................................... 16-13
Resolution ........................................................................................................................................... 16-14
Conversion Time & Throughput .......................................................................................................... 16-15
Output Code Format ........................................................................................................................... 16-15
Power Saving Modes .......................................................................................................................... 16-17
16.8
16.8.1
16.8.2
16.8.3
16.8.3.1
16.8.3.2
16.8.4
16.8.5
16.8.6
16.8.7
Specifications and Measured Curves.............................................................................................. 16-17
Default Settings................................................................................................................................... 16-17
Specifications...................................................................................................................................... 16-18
Linearity .............................................................................................................................................. 16-20
Integral non-linearity............................................................................................................................ 16-20
Differential non-linearity ...................................................................................................................... 16-23
Noise................................................................................................................................................... 16-24
Gain Error and Offset Error ................................................................................................................. 16-25
Power Consumption............................................................................................................................ 16-26
Power Supply Rejection Ratio............................................................................................................. 16-28
16.9
16.9.1
16.9.2
16.9.3
16.9.4
16.9.5
Application Hints............................................................................................................................... 16-29
Input Impedance ................................................................................................................................. 16-29
PGA Settling or Input Channel Modifications....................................................................................... 16-29
PGA Gain & Offset, Linearity and Noise.............................................................................................. 16-29
Frequency Response .......................................................................................................................... 16-30
Power Reduction................................................................................................................................. 16-31
© Semtech 2005
16-1
www.semtech.com
Share Link: 
