AD9281 Analog Devices, AD9281 Datasheet - Page 6

• Manufacturer Part Number: AD9281
• Description: Dual Channel 8-Bit Resolution CMOS ADC
• Manufacturer: Analog Devices

Specifications of AD9281

• Resolution (bits): 8bit
• # Chan: 2
• Sample Rate: 28MSPS
• Interface: Par
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (Vref) p-p,1 V p-p,2 V p-p,Uni (Vref),Uni 1.0V,Uni 2.0V
• Adc Architecture: Pipelined
• Pkg Type: SOP

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