Datasheet

AD7765
Rev. A | Page 13 of 32
0.00300
–0.00300
–0.00225
–0.00150
–0.00075
0
0.00075
0.00150
0.00225
6k 55k 59,53510k 15k 20k 25k 30k 35k 40k 45k 50k
INL (%)
16-BIT CODE SCALING
–40°C
+25°C
+85°C
06519-206
Figure 18. Normal Power Mode INL
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0 78,12460k40k20k
AMPLITUDE (dB)
FREQUENCY (Hz)
06519-209
Figure 19. Normal Power Mode; IMD, f
IN
A = 49.7 kHz, f
IN
B = 50.3 kHz,
50 kHz Center Frequency, 128× Decimation Rate
2.0
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
6k 55k 59,53510k 15k 20k 25k 30k 35k 40k 45k 50k
DNL (LSB)
CODE
06519-208
Figure 20. DNL Plot
6k 55k 59,53510k 15k 20k 25k 30k 35k 40k 45k 50k
INL (%)
16-BIT CODE SCALING
–40°C
+25°C
+85°C
06519-207
0.003225
0.003000
0.002250
0.001500
0.000075
0
–0.000120
Figure 21. Low Power Mode INL
06519-009
110
109
108
107
106
105
104
103
102
0 64 128 192 256
LOW SNR
SNR (dB)
DECIMATION RATE
NORMAL SNR
Figure 22. Normal and Low Power Mode; SNR vs. Decimation Rate,
1 kHz, −0.5 dB Input Tone