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ADS1285 Datasheet(PDF) 13 Page - Texas Instruments

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Part # ADS1285
Description  ADS1285 32-Bit, Delta-Sigma ADC for Seismic Applications
PDF  67 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS1285 Datasheet(HTML) 13 Page - Texas Instruments

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6.9 Typical Characteristics
at TA = 25°C, AVDD1 = 5 V, AVSS = 0 V, AVDD2 = 2.5 V, IOVDD = 1.8 V, fCLK = 8.192 MHz (4.096 MHz low-power mode),
VREFP = 4.096 V, VREFN = 0 V, PGA gain = 1, VCM = 2.5 V, fDATA = 500 SPS (unless otherwise noted)
Frequency (Hz)
0
25
50
75
100 125 150 175 200 225 250
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Shorted input, PGA gain = 1
Figure 6-9. High-Power Mode FFT Spectrum
Frequency (Hz)
0
25
50
75
100 125 150 175 200 225 250
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Shorted input, PGA gain = 8
Figure 6-10. High-Power Mode FFT Spectrum
Frequency (Hz)
0
25
50
75
100 125 150 175 200 225 250
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Shorted input, PGA gain = 1, VREF = 2.5 V, AVDD1 = 3.3 V
Figure 6-11. High-Power Mode FFT Spectrum
Frequency (Hz)
0
5
10
15
20
25
30
35
40
45
50
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Buffer operation
PGA gain = 1 operation
RS = 1 kΩ
Figure 6-12. High-Power Mode FFT Spectrum
Frequency (Hz)
0
25
50
75
100 125 150 175 200 225 250
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
fIN = 31.25 Hz, VIN = –0.5 dBFS, PGA gain = 1
Figure 6-13. High-Power Mode FFT Spectrum
Frequency (Hz)
0
25
50
75
100 125 150 175 200 225 250
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
fIN = 31.25 Hz, VIN = –20 dBFS, PGA gain = 1
Figure 6-14. High-Power Mode FFT Spectrum
www.ti.com
ADS1285
SBAS559A – MAY 2022 – REVISED DECEMBER 2022
Copyright © 2022 Texas Instruments Incorporated
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Product Folder Links: ADS1285



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