AD6645ASQ-80 Analog Devices Inc, AD6645ASQ-80 Datasheet - Page 12

• Manufacturer Part Number: AD6645ASQ-80
• Description: IC ADC 14BIT 80MSPS 52-LQFP-PQ4
• Manufacturer: Analog Devices Inc

Specifications of AD6645ASQ-80

• Rohs Status: RoHS non-compliant
• Design Resources: Low Jitter Sampling Clock Generator for High Performance ADCs Using AD9958/9858 and AD9515 (CN0109)
• Number Of Bits: 14
• Sampling Rate (per Second): 80M
• Data Interface: Parallel
• Number Of Converters: 4
• Power Dissipation (max): 1.75W
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 52-LQFP Exposed Pad, 52-eLQFP, 52-HLQFP
• For Use With: AD6645-80/PCBZ - BOARD EVAL ADC 80MSPS AD6645AD6645-MIL/PCB - BOARD EVAL AD6645-MIL/PCB

AD6645
–100
–110
–120
–130
–100
–110
–120
–130
–10
–20
–30
–40
–50
–60
–70
–80
–90
110
100
–10
–20
–30
–40
–50
–60
–70
–80
–90
90
80
70
60
50
40
30
20
10
0
0
0
90
0
Figure 24. Single Tone @ 69.1 MHz, Encode = 76.8 MSPS
0
ENCODE = 80.0MSPS
AIN = 30.5MHz @ –29.5dBFS
NO DITHER
ENCODE = 80.0MSPS
AIN = 30.5MHz
NO DITHER
80
Figure 22. 1 M Sample FFT Without Dither
5
5
5
Figure 23. SFDR Without Dither
70
10
10
ANALOG INPUT LEVEL (dBFS)
3
60
FREQUENCY (MHz)
FREQUENCY (MHz)
15
15
2
50
2
20
20
6
SFDR = 90dB
REFERENCE LINE
40
ENCODE = 76.8MSPS
AIN = 69.1MHz @ –1dBFS
SNR = 73.5dB
SFDR = 89.0dBc
3
25
25
30
30
30
20
6
4
35
35
10
4
5
40
40
0
Rev. D | Page 12 of 24
–100
–110
–120
–130
–100
–110
–120
–130
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
110
100
90
80
70
60
50
40
30
20
10
Figure 27. W-CDMA Tone @ 69.1 MHz, Encode = 76.8 MSPS
0
0
0
–90
0
0
ENCODE = 80.0MSPS
AIN = 30.5MHz @ –29.5dBFS
WITH DITHER @ –19.2 dBm
ENCODE = 80.0MSPS
AIN = 30.5MHz
WITH DITHER @ –19.2dBm
SFDR = 100dB
REFERENCE LINE
–80
5
5
Figure 25. 1 M Sample FFT with Dither
5
–70
10
10
Figure 26. SFDR with Dither
ANALOG INPUT LEVEL (dBFS)
3
–60
FREQUENCY (MHz)
FREQUENCY (MHz)
15
15
2
–50
2
20
20
–40
SFDR = 90dB
REFERENCE LINE
ENCODE = 76.8MSPS
AIN = W-CDMA @ 69.1MHz
6
3
25
25
–30
30
30
–20
6
4
35
35
–10
4
5
40
40
0