AD7478A Analog Devices, AD7478A Datasheet - Page 13

• Manufacturer Part Number: AD7478A
• Description: 8-Bit, 1 MSPS, Low-Power A/D Converter in SC70 and MSOP Packages
• Manufacturer: Analog Devices

Specifications of AD7478A

• Resolution (bits): 8bit
• # Chan: 1
• Sample Rate: 1.2MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SC70,SOP

–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
512
512
Figure 12. AD7476A DNL Performance
Figure 11. AD7476A INL Performance
1024
1024
1536
1536
CODE
CODE
2048
2048
2560
2560
V
TEMP = 25°C
f
SAMPLE
DD
V
TEMP = 25°C
f
3072
SAMPLE
3072
DD
= 2.35V
= 2.35V
= 1MSPS
3584
= 1MSPS
3584
4096
4096
Rev. F | Page 13 of 28
Figure 13. THD vs. Analog Input Frequency for Various Source Impedances
Figure 14. THD vs. Analog Input Frequency for Various Supply Voltages
–10
–20
–30
–40
–50
–60
–70
–80
–90
–60
–65
–70
–75
–80
–85
–90
0
10
10
AD7476A/AD7477A/AD7478A
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
V
DD
= 4.75V
100
100
R
R
IN
IN
R
= 130Ω
V
V
IN
= 1kΩ
DD
DD
= 10kΩ
= 3.6V
= 2.7V
V
V
DD
DD
= 2.35V
= 5.25V
R
IN
V
R
DD
= 13Ω
IN
= 3.6V
= 0Ω
1000
1000