AD7760 Analog Devices, AD7760 Datasheet - Page 15

• Manufacturer Part Number: AD7760
• Description: 2.5 MSPS, 24-Bit, 100 dB Sigma-Delta ADC with On-Chip Buffer
• Manufacturer: Analog Devices

Specifications of AD7760

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

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