Datasheet
ADAU1761
Rev. C | Page 19 of 92
0 0.05 0.10 0.20 0.30 0.400.15 0.25 0.35 0.500.45
–0.05
–0.04
–0.03
–0.02
–0.01
0
0.01
0.02
0.03
0.04
0.05
FREQUENCY (NORMALIZED TO
f
S
)
MAGNITUDE (dBFS)
07680-017
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
FREQUENCY (NORMALIZED TO
f
S
)
MAGNITUDE (dBFS)
0.10 0.20.30.40.50.60.70.80.91.0
0
7680-016
Figure 20. DAC Interpolation Filter, 128× Oversampling, Normalized to f
S
Figure 23. DAC Interpolation Filter Pass-Band Ripple, 128× Oversampling,
Normalized to f
S
100
90
80
70
60
50
40
30
20
10
0
FREQUENCY (NORMALIZED TO
f
S
)
MAGNITUDE (dBFS)
0.10 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
07680-018
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
0.20
0 0.05 0.10 0.20 0.30 0.400.15 0.25 0.35
FREQUENCY (NORMALIZED TO
f
S
)
MAGNITUDE (dBFS)
07680-019
Figure 24. DAC Interpolation Filter Pass-Band Ripple, 128× Oversampling,
Double-Rate Mode, Normalized to f
S
Figure 21. DAC Interpolation Filter, 128× Oversampling, Double-Rate Mode,
Normalized to f
S
INSTRUCTIONS
CURRENT (mA)
0
1
2
3
4
5
6
7
8
9
10
11
12
0 100 200 300 400 500 600 700 800 900 1000 1100
0
7680-065
0
10
20
30
40
50
60
70
80
90
35.00
32.75
30.50
28.25
26.00
23.75
21.50
19.25
17.00
14.75
12.50
10.25
8.00
5.75
3.50
1.25
–1.00
–3.25
–5.50
–7.75
–10.00
–12.25
IMPEDANCE (k)
GAIN (dB)
0
7680-125
Figure 25. Input Impedance vs. Gain for Analog Inputs Figure 22. Typical DSP Current Draw