AD9643 Analog Devices, AD9643 Datasheet - Page 16

• 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
TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = 1.8 V, DRVDD = 1.8 V, sample rate = maximum sample rate per speed grade, DCS enabled, 1.75 V p-p differential input, VIN =
−1.0 dBFS, 32k sample,
T
A
= 25°C, unless otherwise noted.
–100
–120
–140
–100
–120
–140
–100
–120
–140
–20
–40
–60
–80
–20
–40
–60
–80
–20
–40
–60
–80
Figure 7. AD9643-170 Single-Tone FFT with f
Figure 8. AD9643-170 Single-Tone FFT with f
Figure 6. AD9643-170 Single-Tone FFT with f
0
0
0
0
0
0
SECOND HARMONIC
170MSPS
90.1MHz @ –1dBFS
SNR = 70.8dB (71.8dBFS)
SFDR = 88dBc
10
10
10
SECOND HARMONIC
20
20
20
30
30
30
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
40
40
40
THIRD HARMONIC
THIRD HARMONIC
170MSPS
185.1MHz @ –1dBFS
SNR = 69.8dB (70.8dBFS)
SFDR = 85dBc
170MSPS
305.1MHz @ –1dBFS
SNR = 68.3dB (69.3dBFS)
SFDR = 79dBc
50
50
50
THIRD HARMONIC
SECOND HARMONIC
60
60
60
IN
IN
IN
= 185.1 MHz
= 305.1 MHz
= 90.1 MHz
70
70
70
80
80
80
Rev. B | Page 16 of 36
Figure 11. AD9643-170 Two-Tone SFDR/IMD3 vs. Input Amplitude (A
Figure 9. AD9643-170 Single-Tone SNR/SFDR vs. Input Amplitude (A
Figure 10. AD9643-170 Single-Tone SNR/SFDR vs. Input Frequency (f
–100
–120
–20
–40
–60
–80
120
100
100
80
60
40
20
95
90
85
80
75
70
65
60
–90.0
–100
0
0
60
90
–90
f
–78.5
IN1
120
= 89.12, f
–80
IMD3 (dBc)
150
–67.0
–70
SFDR (dBc)
INPUT AMPLITUDE (dBFS)
INPUT AMPLITUDE (dBFS)
IN2
180
SFDR (dBFS)
f
FREQUENCY (MHz)
SFDR (dBFS)
IMD3 (dBFS)
SFDR (dBc)
SNR (dBFS)
IN
= 92.12 MHz, f
SNR (dBFS)
SFDR (dBc)
–60
–55.5
= 90.1 MHz
210
–50
240
–44.0
–40
270
S
= 170 MSPS
SNR (dBc)
–32.5
–30
300
Data Sheet
330 360 390
–20
–21.0
–10
–7.0
0
IN
IN
) with
) with
IN
)