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EVAL-AD7791EBZ Datasheet(PDF) 10 Page - Analog Devices

Part # EVAL-AD7791EBZ
Description  Low Power, Buffered 24-Bit Sigma-Delta ADC
PDF  21 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

EVAL-AD7791EBZ Datasheet(HTML) 10 Page - Analog Devices

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Data Sheet
AD7791
Rev. A | Page 9 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
04227-0-012
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
40
80
20
60
100
120
140
160
0
FREQUENCY (Hz)
Figure 6. Frequency Response with 16.6 Hz Update Rate
04227-0-010
0
20
8388591
8388619
40
60
80
100
CODE
VDD = 3V
VREF = 2.048V
9.5Hz UPDATE RATE
TA = 25°C
RMS NOISE = 1
µV
Figure 7. Noise Distribution Histogram
(CDIV1 = CDIV0 = 0)
04227-0-011
8388591
0
200
400
600
800
1000
8388619
READ NO.
VDD = 3V, VREF = 2.048V, 9.5Hz UPDATE RATE
TA = 25°C, RMS NOISE = 1µV
Figure 8. Typical Noise Plot with 16.6 Hz Update Rate
(CDIV1 = CDIV0 = 0)
04227-0-014
0
1
2
3
4
5
6
7
8
8388592
8388616
9
CODE
VDD = 3V
VREF = 2.048V
1.1875Hz UPDATE RATE
TA = 25°C
RMS NOISE = 1.25
µF
Figure 9. Noise Histogram for Clock Divide by 8 Mode
(CDIV0 = CDIV1 = 1)
04227-0-013
8388592
0
20
40
60
80
100
8388616
READ NO.
VDD = 3V, VREF = 2.048V
1.1875Hz UPDATE RATE
TA = 25°C, RMS NOISE = 1.25µF
Figure 10. Noise Plot in Clock Divide by 8 Mode
(CDIV0 = CDIV1 = 1)
04227-0-015
0
0.5
1.0
1.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
3.0
2.5
2.0
VREF (V)
VDD = 5V
UPDATE RATE = 16.6Hz
TA = 25°C
Figure 11. RMS Noise vs. Reference Voltage



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