AD9280 Analog Devices, AD9280 Datasheet - Page 17

• Manufacturer Part Number: AD9280
• Description: 8-Bit, Complete, 32 MSPS A/D Converter
• Manufacturer: Analog Devices

Specifications of AD9280

• Resolution (bits): 8bit
• # Chan: 1
• Sample Rate: 32MSPS
• Interface: Par
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: 1 V p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: SOP

REV. E
Figures 35–38 combine the dual-tone SFDR as well as single
tone SFDR and SNR performance at IF frequencies of 45 MHz,
70 MHz, 85 MHz and 135 MHz. Note, the SFDR vs. ampli-
tude data is referenced to dBFS while the single tone SNR data
70
60
50
40
30
20
10
70
60
50
40
30
20
10
0
0
–0.5
–0.5
Figure 35. SNR/SFDR for IF @ 45 MHz
Figure 36. SNR/SFDR for IF @ 70 MHz
CLK = 31.1MHz
SINGLE TONE = 70.5MHz
DUAL TONE F1 = 69.5MHz
F2 = 70.5MHz
CLK = 25.7MHz
SINGLE TONE = 45.5MHz
DUAL TONE F1 = 44.5MHz
F2 = 45.5MHz
–5
–5
–10
–10
INPUT POWER LEVEL – dBFS
INPUT POWER LEVEL – dBFS
–15
–15
SINGLE TONE SFDR
–20
–20
SINGLE TONE SFDR
–25
–25
DUAL TONE SFDR
SNR
SNR
DUAL TONE SFDR
–30
–30
–35
–35
–40
–40
–17–
is referenced to dBc. The AD9280 was operated in the differen-
tial mode (via transformer) with a 1 V span. The analog sup-
ply (AVDD) and the digital supply (DRVDD) were set to +5 V
and 3.3 V, respectively.
80
70
60
50
40
30
20
10
70
60
50
40
30
20
10
0
–0.5
0
–0.5
Figure 38. SNR/SFDR for IF @ 135 MHz
Figure 37. SNR/SFDR for IF @ 85 MHz
CLK = 30.9MHz
SINGLE TONE = 85.5MHz
DUAL TONE F1 = 84.5MHz
F2 = 85.5MHz
–5
FS = 32MHz
SINGLE TONE = 135.5MHz
F1 = 134.5MHz
F2 = 135.5MHz
–5
–10
–10
INPUT POWER LEVEL – dBFS
INPUT POWER LEVEL – dBFS
–15
–15
DUAL TONE SFDR
–20
–20
DUAL TONE SFDR
–25
–25
SNR
SINGLE TONE SFDR
SNR
SINGLE TONE SFDR
–30
–30
AD9280
–35
–35
–40
–40