8.6 Input Multiplexer
T | = 25°C, AV | = 3.3 V, DV = 3.3 V, f | S | = 48 kHz, |
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A | DD | DD |
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| TEST CONDITIONS | MIN TYP MAX | UNIT |
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Input impedance |
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| 20 | kΩ | |
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Crosstalk |
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| 85 | dB | |
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| 1.7 | VPP | |||
8.7 DAC Interpolation Filter
TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, fS = 48 kHz,
All terms characterized by frequency are scaled with the normal mode sampling frequency, fS. See Figure 8−5 and Figure 8−6 for performance curves of the DAC digital filter.
PARAMETER | TEST CONDITIONS | MIN TYP | MAX | UNIT |
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Pass band |
| 0.0 | 20.0 | kHz |
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| ±0.005 |
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Stop band |
| 24.1 |
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28.8 kHz to 3 MHz | 75 |
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Group delay |
| 700 |
| ∝s |
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Amplitude − dB
0
R
−20
−40
−60
−80
−100
0 | fs/2 | 1 fs | 2 fs | 3 fs | 4 fs | 5 fs |
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| f − Frequency − Hz |
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Figure 8−5. DAC Filter Overall Frequency Characteristics
| 0.1 |
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− dB | 0.05 |
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Amplitude | 0 |
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−0.05 |
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| −0.1 |
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| 0 | 0.1 fs | 0.2 fs | 0.3 fs | 0.4 fs | 0.5 fs |
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| f − Frequency − Hz |
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Figure 8−6. DAC Digital Filter
8−4
