AD7273 Analog Devices, AD7273 Datasheet - Page 12

• Manufacturer Part Number: AD7273
• Description: 3 MSPS 10-Bit ADC in TSOT and MSOP Packages
• Manufacturer: Analog Devices

Specifications of AD7273

• Resolution (bits): 10bit
• # Chan: 1
• Sample Rate: 3MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: (Vref) p-p,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: SOP,SOT

AD7273/AD7274
–100
–110
Figure 16. Power Supply Rejection Ratio (PSRR) vs. Supply Ripple
–70
–80
–90
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
0
0
0
100mV p-p SINE WAVE ON AV
NO DECOUPLING
500
500
500
Figure 18. AD7274 DNL Performance
Figure 17. AD7274 INL Performance
Frequency Without Decoupling
SUPPLY RIPPLE FREQUENCY (MHz)
1000
1000
1000
1500
1500
CODES
CODES
2000
2000
1500
DD
2500
2500
2000
3000
3000
2500
V
V
3500
3500
DD
DD
= 3V
= 3V
4000
4000
3000
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–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
3.60
3.40
3.20
3.00
2.80
2.60
2.40
2.20
2.00
1.80
1.60
1.40
1.20
1.00
0.80
0.60
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
Figure 20. Change in DNL vs. Reference Voltage, 3 V Supply
Figure 19. Change in INL vs. Reference Voltage, 3 V Supply
0
0
1.4
1.4
0
Figure 21. Maximum Current vs. Supply Voltage
1.6
1.6
1.8
1.8
POSITIVE DNL
POSITIVE INL
10
for Different SCLK Frequencies
2.0
2.0
NEGATIVE DNL
NEGATIVE INL
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
SCLK FREQUENCY (MHz)
V
DD
2.2
2.2
= 3.6V
20
2.4
2.4
V
V
DD
2.6
2.6
DD
= 2.5V
= 3V
30
2.8
2.8
3.0
3.0
40
3.2
3.2
3.4
3.4
3.6
3.6
50