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AD7262BSTZ 数据表(PDF) 13 Page - Analog Devices

部件名 AD7262BSTZ
功能描述  1 MSPS, 12-Bit, Simultaneous Sampling SAR ADC
PDF  33 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7262BSTZ 数据表(HTML) 13 Page - Analog Devices

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AD7262
Data Sheet
Rev. B | Page 12 of 32
–90
–88
–86
–84
–82
–78
–76
–74
–72
–80
–70
1
2
3
4
6
8
12 16 24 32 48 64 96 128
GAIN
AVCC = 5V
VDRIVE = 5V
fS = 1MSPS
INTERNAL REFERENCE
fRIPPLE = 50kHz
Figure 17. Common-Mode Rejection vs. Gain
–80
–79
–78
–77
–76
–75
–74
–73
–72
–71
–70
0
20
40
60
80
100
120
140
160
180
200
RIPPLE FREQUENCY (kHz)
AVCC = 5V
VDRIVE = 5V
fS = 1MSPS
VRIPPLE = 700mV p-p
GAIN = 2
INTERNAL REFERENCE
Figure 18. Common-Mode Rejection vs. Common-Mode Ripple Frequency
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
1.31.5 1.71.92.1 2.32.52.72.93.1 3.33.53.7
VCM RANGE (V)
AVCC = 5V
VDRIVE = 5V
fS = 1MSPS
INTERNAL REFERENCE
fIN = 100kHz
GAIN 1
GAIN 2
GAIN 3
GAIN 4
GAIN 12
GAIN 24
GAIN 6
GAIN ≥ 32
GAIN 8
GAIN 16
Figure 19. THD vs. Common-Mode Range for Various PGA Gain Settings
OVERDRIVE VOLTAGE (mV)
0
1
2
3
4
5
6
7
8
9
10
0
10
2030
4050
60708090
100
L TO H, CA_CBVCC = 4.5V
L TO H, CA_CBVCC = 5V
H TO L, CA_CBVCC = 3.6V
H TO L, CA_CBVCC = 4.5V
H TO L, CA_CBVCC = 5V
H TO L, CA_CBVCC = 2.7V
L TO H, CA_CBVCC = 3.6V
L TO H, CA_CBVCC = 2.7V
AVCC = 5V
VDRIVE = 3.3V
TA = 25°C
Figure 20. Propagation Delay for Comparator A and Comparator B vs.
Overdrive Voltage for Various Supply Voltages
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
OVERDRIVE VOLTAGE (mV)
0
10
20
304050
60708090
100
H TO L, CC_CDVCC = 4.5V
H TO L, CC_CDVCC = 5V
L TO H, CC_CDVCC = 3.6V
L TO H, CC_CDVCC = 4.5V
L TO H, CC_CDVCC = 5V
L TO H, CC_CDVCC = 2.7V
H TO L, CC_CDVCC = 3.6V
H TO L, CC_CDVCC = 2.7V
AVCC = 5V
VDRIVE = 3.3V
TA = 25°C
Figure 21. Propagation Delay for Comparator C and Comparator D vs.
Overdrive Voltage for Various Supply Voltages
SUPPLY RIPPLE FREQUENCY (kHz)
–120
–115
–110
–105
–100
–95
–90
–85
–80
–75
0
200
400
600
800
1000
–70
VDRIVE = 5V
GAIN = 2
TA = 25°C
INTERNAL REFERENCE
100mV p-p SINE WAVE ON AVCC
AVCC DECOUPLED WITH
10µF AND 100nF CAPACITORS
Figure 22. Power Supply Rejection Ratio vs. Supply Ripple Frequency?



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