AD9281
–6–
–Typical Characteristic Curves
(AVDD = +3 V, DVDD = +3 V, FS = 28 MHz (50% duty cycle), 2 V input span from –0.5 V to +1.5 V, 2 V internal reference unless otherwise noted)
CODE OFFSET
1
–1
0
LSB 0
16 32 48 64 80 96 112 128 144 160 176 192 208 224 240
Figure 3. Typical INL
CODE OFFSET
1
–1
0
LSB 0
16 32 48 64 80 96 112 128 144 160 176 192 208 224 240
Figure 4. Typical DNL
INPUT VOLTAGE – Volts
1.00
–1.00
–1.0
2.0
–0.5
I B
–
nA
0
0.5
1.0
1.5
0.80
0.20
–0.40
–0.60
–0.80
0.60
0.40
0.00
–0.20
Figure 5. Input Bias Current vs. Input Voltage
INPUT FREQUENCY – Hz
55
1.0E+05
SNR
–
dB
50
45
40
35
30
25
1.0E+06
1.0E+07
1.0E+08
–0.5dB
–6dB
–20dB
Figure 6. SNR vs. Input Frequency
INPUT FREQUENCY – Hz
55
1.0E+05
SNR
–
dB
50
45
40
35
30
25
1.0E+06
1.0E+07
1.0E+08
–0.5dB
–6dB
–20dB
Figure 7. SINAD vs. Input Frequency
INPUT FREQUENCY – Hz
–30
1.0E+05
THD
–
dB
–35
–40
–45
–50
–55
–60
1.0E+06
1.0E+07
1.0E+08
–65
–70
–0.5dB
–6dB
–20dB
Figure 8. THD vs. Input Frequency
REV. F