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AS39513 Datasheet(PDF) 33 Page - ams AG

Part # AS39513
Description  NFC Sensor Tag and Data Logger IC
PDF  108 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS39513 Datasheet(HTML) 33 Page - ams AG

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ams Datasheet
Page 33
[v1-10] 2018-Apr-25
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AS39513 − Detailed Description
Analog to Digital Conversion
This section describes how to compute the ADC output code
that will result from a sensor input. A block diagram of the
sensor interface and ADC is shown in Figure 20.
Figure 20:
Sensor Interface and ADC Block Diagram
Figure 21:
ADC Input-Output Characteristic
MUX
Temp Sensor
Battery Voltage
Ext. Sensor Input
Gain & Offset
DC Offset: V
MUXO
A
MUX
10bit
ADC
V
ADCin= VMUXO+ AMUX.VMUXSIG
V
MUXSIG
Digital
offset
10bit offset
TSMOFF – offset for temp & battery
EXMOFF – offset for ext. sensor
V1
V2
Dual slope
ADC
Sensor inputs selected for data
logging are determined by bits
TSMEAS, EXMEAS & BVMEAS
ADC ref voltages
V
RNG V
LOW
Code
0
1024
V2
ADC Range:
V2-V1
2xV2-V1
Vin



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