AD9643 Analog Devices, AD9643 Datasheet - Page 17

• 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

Data Sheet
Figure 12. AD9643-170 Two-Tone SFDR/IMD3 vs. Input Amplitude (A
Figure 14. AD9643-170 Two-Tone FFT with f
Figure 13. AD9643-170 Two-Tone FFT with f
–100
–120
–100
–120
–140
–100
–120
–140
–20
–40
–60
–80
–20
–40
–60
–80
–20
–40
–60
–80
–90.0
0
0
0
0
0
170MSPS
89.12MHz @ –7dBFS
92.12MHz @ –7dBFS
SFDR = 89dBc (96dBFS)
f
IN1
–78.5
10
10
= 184.12, f
IMD3 (dBc)
20
20
–67.0
INPUT AMPLITUDE (dBFS)
IN2
SFDR (dBFS)
IMD3 (dBFS)
f
30
f
SFDR (dBc)
30
FREQUENCY (MHz)
FREQUENCY (MHz)
= 187.12 MHz, f
S
S
= 170 MSPS
= 170 MSPS
–55.5
40
40
–44.0
170MSPS
184.12MHz @ –7dBFS
187.12MHz @ –7dBFS
SFDR = 84dBc (91dBFS)
50
50
IN1
IN1
S
= 184.12, f
= 170 MSPS
= 89.12, f
–32.5
60
60
–21.0
IN2
70
IN2
70
= 92.12 MHz,
= 187.12 MHz,
80
80
–7.0
IN
) with
Rev. B | Page 17 of 36
Figure 15. AD9643-170 Single-Tone SNR/SFDR vs. Sample Rate (f
100
–100
–120
–140
6000
5000
4000
3000
2000
1000
95
90
85
80
75
70
–20
–40
–60
–80
Figure 17. AD9643-210 Single-Tone FFT with f
40
0
0
0
N – 5
Figure 16. AD9643-170 Grounded Input Histogram
50
210MSPS
90.1MHz @ –1dBFS
SNR = 70.6dB (71.6dBFS)
SFDR = 88dBc
10
N – 4
60
SECOND HARMONIC
20
70
N – 3
80
30
N – 2
with f
SAMPLE RATE (MSPS)
90
FREQUENCY (Hz)
THIRD HARMONIC
40
N – 1
OUTPUT CODE
IN
100
= 90.1 MHz
50
110
N
N + 1
60
120
SFDR, CHANNEL B
SNR, CHANNEL B
SFDR, CHANNEL A
SNR, CHANNEL A
130 140 150 160
N + 2 N + 3 N + 4 N + 5
70
1.34LSB rms
16,379 TOTAL HITS
IN
80
= 90.1 MHz
90
AD9643
100
170
S
)