AD7762 Analog Devices, AD7762 Datasheet - Page 11

• Manufacturer Part Number: AD7762
• Description: Parallel Interface, 625 kSPS, 24-Bit Sigma-Delta A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7762

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: 40MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: (1.6Vref) p-p,4 V p-p,6.5 V p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: QFP

Figure 11. Normal Mode FFT, 100 kHz, −0.5 dB Input Tone, 32× Decimation
Figure 12. Normal Mode FFT, 100 kHz, −6 dB Input Tone, 32× Decimation
Figure 13. Normal Mode SNR vs. Decimation Rate, 1 kHz Input Tone
–100
–125
–150
–175
–200
–100
–125
–150
–175
–200
–25
–50
–75
–25
–50
–75
120
118
116
114
112
110
108
106
0
0
0
0
0
60000
60000
64
DECIMATION RATE (x)
120000
120000
FREQUENCY (Hz)
FREQUENCY (Hz)
128
180000
180000
240000
240000
192
–60dB
–6dB
–0.5dB
300000
300000
256
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Figure 14. Low Power FFT, 100 kHz, −0.5 dB Input Tone, 32× Decimation
Figure 15. Low Power FFT, 100 kHz, −6 dB Input Tone, 32× Decimation
Figure 16. Low Power SNR vs. Decimation Rate, 1 kHz Input Tone
–100
–125
–150
–175
–200
–100
–125
–150
–175
–200
–25
–50
–75
–25
–50
–75
116
112
108
104
0
0
0
0
0
60000
60000
64
DECIMATION RATE (x)
120000
120000
FREQUENCY (Hz)
FREQUENCY (Hz)
128
180000
180000
240000
240000
192
–60dB
–6dB
–0.5dB
AD7762
300000
300000
256