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AFE4490 Datasheet(PDF) 29 Page - Texas Instruments

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Part # AFE4490
Description  Integrated Analog Front-End for Pulse Oximeters
PDF  70 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AFE4490 Datasheet(HTML) 29 Page - Texas Instruments

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ADC Conversion
Pulse repetition period
T = 1/PRF
ADC Reset
ADC_RDY Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0%
25%
50%
75%
ADC Data
Average of
ADC data 1 to 3 are
written into
register 42.
Average of
ADC data 5 to 7
are written into
register 43.
Average of
ADC data 9 to 11 are
written into
register 44.
Average of
ADC data 13 to 15 are written
into register 45.
Register 42 and register 43
are written into register 46.
Register 44 and register 45
are written into register 47.
0%
17
18
19
20
0 T
1.0 T
AFE4490
www.ti.com
SBAS602B – DECEMBER 2012 – REVISED FEBRUARY 2013
NOTE: Example is with three averages. The value of the NUMAVG[7:0] register bits = 2.
Figure 39. ADC Data with Averaging Enabled
Copyright © 2012–2013, Texas Instruments Incorporated
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