HMP9701 Intersil Corporation, HMP9701 Datasheet - Page 20

• Manufacturer Part Number: HMP9701
• Description: AC97 Audio Codec
• Manufacturer: Intersil Corporation

Typical Application Schematic Notes
1. A note about the capacitors used for coupling externally
2. The crystal should be a parallel resonant type, frequency is
3. It is recommended to decouple each analog and digital
4. Locate all decoupling capacitors CLOSE to their associat-
5. Please note that all analog inputs and outputs of the
6. Keep all analog input and output traces as short as possi-
7. For optimum performance, it is preferred to layout sepa-
8. When using an external clock source, please feed that sig-
input audio or for outputting audio externally:
The capacitance value and the associated circuit imped-
ances will determine the lower frequency cutoff of the au-
dio signal. The designer must determine what the circuit
impedances are and select the coupling capacitor value
accordingly. Ceramic types (over electrolytic) are highly
recommended.
24.756MHz, initial room temperature tolerance of 50ppm,
and a load cap of about 16-20pF.
power supply pin with a combination of a small value and
large value bypass capacitor. The large value capacitor
should be either a tantalum or aluminum electrolytic type.
ed pins on the codec.
HMP9701 codec are at the DC level of V
AC coupling to zero biased signal sources and destina-
tions.
ble, prevent any coupling from adjacent digital lines.
rate analog and digital ground planes, joining them togeth-
er at a point directly adjacent to the codec (i.e., directly
under it). This case is true even if the designer is using a
single supply for the codec; the single supply would have
adequate decoupling/isolation between the digital and an-
alog sections.
nal into XTL_OUT (not XTL_IN) and leave XTL_IN uncon-
nected. Also, do not use any capacitors between XTL_IN
and GND or XTL_OUT and GND in that mode.
REF
and require
HMP9701
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