AD7468 Analog Devices, AD7468 Datasheet - Page 14

• Manufacturer Part Number: AD7468
• Description: 1.6 V Micro-Power 8-Bit ADC
• Manufacturer: Analog Devices

Specifications of AD7468

• Resolution (bits): 8bit
• # Chan: 1
• Sample Rate: 200kSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: SOP,SOT

AD7466/AD7467/AD7468
–68.0
–68.5
–69.0
–69.5
–70.0
–70.5
–71.0
–71.5
–72.0
–72.5
–73.0
–15
–25
–35
–45
–55
–65
–75
–85
–95
–65
–66
–67
–68
–69
–70
–71
–72
–73
–5
5
10
10
0
Figure 8. AD7468 Dynamic Performance at 100 kSPS
Figure 9. AD7466 SINAD vs. Analog Input Frequency
Figure 10. AD7466 SNR vs. Analog Input Frequency
5
at 100 kSPS for Various Supply Voltages
at 100 kSPS for Various Supply Voltages
V
V
V
10
V
DD
DD
DD
DD
= 1.8V V
= 1.8V
= 3.6V
= 3.6V
15
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
FREQUENCY (kHz)
V
20
DD
DD
V
V
DD
DD
= 1.6V V
= 1.6V
= 3V
= 3V
25
V
V
30
V
DD
DD
DD
DD
= 2.2V
= 2.2V
= 2.7V
= 2.7V
8192 POINT FFT
V
f
f
SINAD = 49.83dB
THD = –79.37dB
SFDR = –70.46dB
35
SAMPLE
IN
DD
= 30kHz
TEMP = 25°C
TEMP = 25 ° C
= 1.8V
40
= 100kSPS
45
100
100
50
Rev. C | Page 14 of 28
–0.2
–0.4
–0.6
–0.8
–1.0
–65
–67
–69
–71
–73
–75
–77
–79
–81
–83
–85
–76
–77
–78
–79
–80
–81
–82
–83
–84
1.0
0.8
0.6
0.4
0.2
0
10
10
0
Figure 11. AD7466 THD vs. Analog Input Frequency
Figure 12. AD7466 THD vs. Analog Input Frequency
V
TEMP = 25°C
f
f
V
IN
SAMPLE
DD
DD
R
R
= 50Hz
IN
IN
= 1.8V
512
at 100 kSPS for Various Supply Voltages
= 1.6V
= 510Ω
= 10Ω
Figure 13. AD7466 INL Performance
= 100kSPS
for Various Source Impedances
1024
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
R
1536
IN
= 100Ω
CODE
2048
V
V
DD
DD
= 3V
V
= 3.6V
2560
DD
= 2.2V
V
DD
3072
R
= 1.8V
TEMP = 25°C
V
TEMP = 25°C
IN
DD
= 1kΩ
= 2.7V
V
3584
DD
R
IN
= 2.7V
= 0Ω
4096
100
100