WM9010ECSN/R Wolfson Microelectronics, WM9010ECSN/R Datasheet - Page 9

• Manufacturer Part Number: WM9010ECSN/R
• Description: Audio CODECs Analog-In class-G headphone amplifier
• Manufacturer: Wolfson Microelectronics

Specifications of WM9010ECSN/R

• Thd Plus Noise: 33 dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Preliminary Technical Data
CHARGE PUMP
The WM9010 incorporates a charge pump circuit, which generates the supply rails for the headphone
output drivers. The charge pump is powered from VDD, and generates split rails CPVOUTP and
CPVOUTN. The circuit is adaptive according to the audio signal conditions, supporting the Class G
operation and ensuring optimum circuit configuration at all times. The switching clock for the charge
pump is generated internally.
The external connections for the charge pump are illustrated in Figure 3. A fly-back capacitor is
connected between the CPCA and CPCB pins. De-coupling capacitors are required on CPVOUTP
and CPVOUTN. An input decoupling capacitor may also be required at VDD, depending upon the
system configuration.
Figure 2 External Connections for HPOUTL and HPOUTR
Figure 3 External Connections for Charge Pump
PTD, May 2010, Rev 2.0
WM9010
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