Datasheet

AD7912/AD7922
Rev. 0 | Page 14 of 32
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
0 512 1024 1536 2048 2560 3072 3584 4096
04351-0-045
INL ERROR (LSB)
CODE
V
DD
= 2.7V
F
SAMP
= 1MSPS
TEMPERATURE = 25
° C
Figure 14. AD7922 INL Performance
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
0 512 1024 1536 2048 2560 3072 3584 4096
04351-0-046
DNL ERROR (LSB)
CODE
V
DD
= 2.7V
F
SAMP
= 1MSPS
TEMPERATURE = 25
° C
Figure 15. AD7922 DNL Performance
–20
–30
–40
–50
–60
–70
–80
–90
10 100 1000
04351-0-047
THD (dB)
FREQUENCY (kHz)
R
IN
= 500Ω
R
IN
= 1kΩ
R
IN
= 100Ω
R
IN
= 10Ω
R
IN
= 50Ω
R
IN
= 0Ω
V
DD
= 3.6V
Figure 16. THD vs. Analog Input Frequency for Various Source Impedances
–68
–70
–72
–74
–76
–78
–80
–88
–82
–84
–86
10 100 1000
04351-0-048
THD (dB)
FREQUENCY (kHz)
V
DD
= 2.35V
V
DD
= 2.7V
V
DD
= 4.75V
V
DD
= 3.6V
V
DD
= 5.25V
Figure 17. THD vs. Analog Input Frequency for Various Supply Voltages
180
160
140
120
100
80
60
40
20
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
04351-0-049
SHUTDOWN CURRENT (nA)
SUPPLY VOLTAGE (V)
TEMP = –40°C
TEMP = +85°C
TEMP = +25°C
Figure 18. Shutdown Current vs. Supply Voltage