AD6644AST-40 Analog Devices Inc, AD6644AST-40 Datasheet - Page 11

• Manufacturer Part Number: AD6644AST-40
• Description: IC ADC 14BIT 40MSPS 52-LQFP
• Manufacturer: Analog Devices Inc

Specifications of AD6644AST-40

• Rohs Status: RoHS non-compliant
• Number Of Bits: 14
• Sampling Rate (per Second): 40M
• Data Interface: Parallel
• Number Of Converters: 4
• Power Dissipation (max): 1.3W
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -25°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 52-LQFP

–100
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ENCODE = 65MSPS
AIN = 15.5MHz
NO DITHER
–80
ENCODE = 65MSPS
AIN = 15.5MHz @ –29.5dBFS
NO DITHER
5
Figure 16. 1M FFT Without Dither
ANALOG INPUT POWER LEVEL (dBFS)
–70
Figure 17. SFDR Without Dither
–60
10
FREQUENCY (MHz)
–50
15
–40
SFDR = 90dB
REFERENCE LINE
20
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–10
30
0
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Figure 18. SNR, Worst Spurious vs. Clamped Encode Power (See Figure 27)
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0
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0
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ENCODE = 65MSPS
AIN = 15.5MHz
DITHER = –19dBm
WORST SPUR
ENCODE = 65MSPS
AIN = 15.5MHz @ –29.5dBFS
DITHER @ –19dBm
–80
–10
30.5MHz
5
ANALOG INPUT POWER LEVEL (dBFS)
–70
Figure 19. 1M FFT with Dither
Figure 20. SFDR with Dither
ENCODE INPUT POWER (dBm)
2.2MHz
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–5
10
SFDR = 90dB
REFERENCE LINE
FREQUENCY (MHz)
–50
30.5MHz
2.2MHz
15
0
–40
20
SNR
SFDR = 100dB
REFERENCE LINE
ENCODE = 65MSPS
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AD6644
30
15
0