max98088 Maxim Integrated Products, Inc., max98088 Datasheet - Page 119

• Manufacturer Part Number: max98088
• Description: Stereo Audio Codec With Flexsound Technology
• Manufacturer: Maxim Integrated Products, Inc.

Table 39. Unused Pins
The value of the flying capacitor (connected between
C1N and C1P) affects the output resistance of the
charge pump. A value that is too small degrades the
device’s ability to provide sufficient current drive, which
leads to a loss of output voltage. Increasing the value
of the flying capacitor reduces the charge-pump output
resistance to an extent. Above 1FF, the on-resistance
of the internal switches and the ESR of external charge-
pump capacitors dominate.
RECN/RXINN
RECP/RXINP
SPKRGND
SPKLGND
SPKRVDD
SDOUTS1
SPKLVDD
JACKSNS
LRCLKS1
DVDDS1
BCLKS1
HPGND
SDINS1
HPVDD
SPKRN
HPSNS
SPKRP
SPKLN
HPVSS
SPKLP
NAME
INB2
C1P
C1N
HPL
HPR
Charge-Pump Flying Capacitor
Always connected
Always connect
Always connect
Always connect
CONNECTION
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
AGND
AGND
AGND
DVDD
with FLEXSOUND Technology
The holding capacitor (bypassing HPVSS) value and
ESR directly affect the ripple at HPVSS. Increasing
the capacitor’s value reduces output ripple. Likewise,
decreasing the ESR reduces both ripple and output
resistance. Lower capacitance values can be used in
systems with low maximum output power levels. See the
Output Power vs. Load Resistance graph in the Typical
Operating Characteristics section for more information
Table 39 shows how to connect the IC's pins when
unused.
MIC1P/DIGMICDATA
MIC1N/DIGMICCLK
INA2/MICEXTN
INA1/MICEXTP
Stereo Audio Codec
SDOUTS2
LRCLKS2
DVDDS2
MICBIAS
BCLKS2
SDINS2
MIC2N
MIC2P
NAME
DGND
AGND
MCLK
DVDD
AVDD
PVDD
INB1
SDA
REG
SCL
IRQ
REF
Charge-Pump Holding Capacitor
Always connect
Always connect
Always connect
Always connect
Always connect
Always connect
Always connect
Always connect
Always connect
Always connect
CONNECTION
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
Unconnected
AGND
DVDD
Unused Pins
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