AD9643 Analog Devices, AD9643 Datasheet - Page 20

• Manufacturer Part Number: AD9643
• Description: 14-Bit, 170/210/250 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
• Manufacturer: Analog Devices

Specifications of AD9643

• Resolution (bits): 14bit
• # Chan: 2
• Sample Rate: 250MSPS
• Interface: LVDS,Par
• Analog Input Type: Diff-Bip
• Ain Range: 1.75 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

AD9643
Figure 31. AD9643-250 Single-Tone SNR/SFDR vs. Input Amplitude (A
Figure 32. AD9643-250 Single-Tone SNR/SFDR vs. Input Frequency (f
–100
–120
–140
120
100
100
Figure 30. AD9643-250 Single-Tone FFT with f
–20
–40
–60
–80
80
60
40
20
95
90
85
80
75
70
65
60
–100
0
0
60
0
10
–90
80
20
100
–80
30
SFDR (dBc)
120
SFDR (dBc)
–70
INPUT AMPLITUDE (dBFS)
with f
40
FREQUENCY (MHz)
SFDR (dBFS)
140
FREQUENCY (MHz)
SNR (dBFS)
–60
IN
50
= 185.1 MHz
SNR (dBFS)
160
THIRD HARMONIC
60
–50
180
70
250MSPS
305.1MHz @ –1dBFS
SNR = 68.6dB (71.6dBFS)
SFDR = 83dBc
SNR (dBc)
–40
SECOND HARMONIC
80
200
–30
90 100 110 120
220
IN
= 305.1 MHz
–20
240
–10
260
0
IN
IN
Rev. B | Page 20 of 36
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Figure 35. AD9643-250 Two-Tone FFT with f
Figure 33. AD9643-250 Two-Tone SFDR/IMD3 vs. Input Amplitude (A
Figure 34. AD9643-250 Two-Tone SFDR/IMD3 vs. Input Amplitude (A
–100
–120
–100
–120
–100
–120
–140
–20
–40
–60
–80
–20
–40
–60
–80
–20
–40
–60
–80
–90.0
–90.0
0
0
0
0
with f
with f
250MSPS
89.12MHz @ –7dBFS
92.12MHz @ –7dBFS
SFDR = 87dBc (94dBFS)
10
–78.5
–78.5
IN1
IN1
20
= 184.12, f
= 89.12, f
IMD3 (dBc)
IMD3 (dBc)
30
–67.0
–67.0
INPUT AMPLITUDE (dBFS)
INPUT AMPLITUDE (dBFS)
40
SFDR (dBFS)
SFDR (dBFS)
IMD3 (dBFS)
IMD3 (dBFS)
f
IN2
IN2
FREQUENCY (MHz)
S
SFDR (dBc)
SFDR (dBc)
= 250 MSPS
–55.5
–55.5
50
= 92.12 MHz, f
= 187.12 MHz, f
60
–44.0
–44.0
70
IN1
80
S
= 89.12, f
–32.5
–32.5
= 250 MSPS
S
= 250 MSPS
90 100 110 120
Data Sheet
–21.0
–21.0
IN2
= 92.12 MHz,
–7.0
–7.0
IN
IN
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