Datasheet AD9281 (Analog Devices) - 7

AD9281–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) 1 55 50 –0.5dB 45 –6dB LSB 0 40 SNR – dB 35 30 –20dB –1 25 0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 1.0E+05 1.0E+06 1.0E+07 1.0E+08 CODE OFFSET INPUT FREQUENCY – Hz
Figure 3. Typical INL Figure 6. SNR vs. Input Frequency
1 55 50 –0.5dB 45 –6dB LSB 0 40 SNR – dB 35 30 –20dB –1 25 0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 1.0E+05 1.0E+06 1.0E+07 1.0E+08 CODE OFFSET INPUT FREQUENCY – Hz
Figure 4. Typical DNL Figure 7. SINAD vs. Input Frequency
1.00 –30 0.80 –35 0.60 –40 –20dB 0.40 0.20 –45 – nA 0.00 –50 I B –0.20 THD – dB –55 –6dB –0.40 –60 –0.60 –0.80 –65 –0.5dB –1.00 –70 –1.0 –0.5 0 0.5 1.0 1.5 2.0 1.0E+05 1.0E+06 1.0E+07 1.0E+08 INPUT VOLTAGE – Volts INPUT FREQUENCY – Hz
Figure 5. Input Bias Current vs. Input Voltage Figure 8. THD vs. Input Frequency –6– REV. F