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AD7760 Datasheet(PDF) 16 Page - Analog Devices

Part # AD7760
Description  Sigma-Delta ADC with On-Chip Buffer
PDF  37 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7760 Datasheet(HTML) 16 Page - Analog Devices

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AD7760
Rev. A | Page 15 of 36
0
–160
995
1005
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
997
999
1001
1003
TONE A: 999.75kHz
TONE B: 1.00025MHz
THIRD-ORDER
IMD: –89.15dB
Figure 23. Normal Mode IMD, 1 MHz Center Frequency, 8× Decimation
100.5
96.5
0
40
MCLK FREQUENCY (MHz)
100.0
99.5
99.0
98.5
98.0
97.5
97.0
10
20
30
LOW POWER MODE
NORMAL MODE
Figure 24. SNR vs. MCLK Frequency, 8× Decimation, −6 dB, 1 kHz Input Tone
120
95
0
256
DECIMATION RATE
115
110
105
100
64
128
192
–0.5dB
–6dB
–60dB
Figure 25. Normal Mode SNR vs. Decimation Rate, 1 kHz Input Tone
0
–160
995
1005
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
997
999
1001
1003
TONE A: 999.75kHz
TONE B: 1.00025MHz
THIRD-ORDER
IMD: –87.67dB
Figure 26. Normal Mode IMD, 1 MHz Center Frequency, 8× Decimation
–105
–117
0
40
MCLK FREQUENCY (MHz)
–107
–109
–111
–113
–115
10
20
30
NORMAL MODE
LOW POWER MODE
Figure 27. THD vs. MCLK Frequency, 8× Decimation, −6 dB, 1 kHz Input Tone
116
96
0
256
DECIMATION RATE
112
108
104
100
64
128
192
–0.5dB
–6dB
–60dB
Figure 28. Low Power SNR vs. Decimation Rate, 1 kHz Input Tone



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