AD7763 Analog Devices, AD7763 Datasheet - Page 12

• Manufacturer Part Number: AD7763
• Description: 24-Bit, 625 kSPS, 109 dB Sigma-Delta ADC with On-Chip Buffers, Serial Interface
• Manufacturer: Analog Devices

Specifications of AD7763

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: 40MSPS
• Interface: I2S,Ser
• Analog Input Type: Diff-Bip
• Ain Range: 4 V p-p,6.5 V p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: QFP

AD7763
Figure 12. Normal Mode FFT, 100 kHz, −0.5 dB Input Tone, 32× Decimation
Figure 13. Normal Mode FFT, 100 kHz, −6 dB Input Tone, 32× Decimation
Figure 14. Normal Mode SNR vs. Decimation Rate, 1 kHz Input Tone
–100
–150
–200
–250
–100
–150
–200
–250
–50
–50
120
118
116
114
112
110
108
106
0
0
0
0
0
50000
50000
64
100000
100000
DECIMATION RATE (×)
FREQUENCY (Hz)
FREQUENCY (Hz)
150000
150000
128
200000
200000
192
250000
250000
–0.5dB
–60dB
–6dB
300000
300000
256
Rev. A | Page 12 of 32
Figure 15. Low Power FFT, 100 kHz, −0.5 dB Input Tone, 32× Decimation
Figure 16. Low Power FFT, 100 kHz, −6 dB Input Tone, 32× Decimation
Figure 17. Low Power SNR vs. Decimation Rate, 1 kHz Input Tone
–100
–150
–200
–250
–100
–150
–200
–250
–50
–50
116
114
112
110
108
106
104
0
0
0
0
0
50000
50000
64
100000
100000
DECIMATION RATE (×)
FREQUENCY (Hz)
FREQUENCY (Hz)
150000
150000
128
200000
200000
192
250000
250000
–0.5dB
–60dB
–6dB
300000
300000
256