PAM8902H

Document number: DSxxxxx Rev. 1 - 0

7 of 12

www.diodes.com

December 2012

© Diodes Incorporated

PAM8902H

A Product Line of

Diodes Incorporated

Application Information

Select Boost Convertor Output Voltage

Configuration

Min

Max

PVCC Voltage

Audio Amplifier Maximum

Output Voltage

Connect to AVDD

AVDD – 0.5V

AVDD

17.5V

Floating

1V

AVDD – 1V

12V

Connect to GND

GND

0.5V

8V

36.5k

Ω

122.6k

Ω

59k

Ω

100k

Ω

82k

Ω

77.4k

Ω

in fully differential amplifiers. The balance of the output on the reference voltage depends on matched ratios of the resistors. CMRR, PSRR, and

cancellation of the second harmonic distortion diminish if resistor mismatch occurs. Therefore, it is recommended to use 1% tolerance resistors

or better to keep the performance optimized. Matching is more important than overall tolerance. Resistor arrays with 1% matching can be used

with a tolerance greater than 1%.

Place the input resistors very close to the PAM8902H to limit noise injection on the high-impedance nodes. For optimal performance the gain

should be set to lower. Lower gain allows the PAM8902H to operate at its best, and keeps a high voltage at the input making the inputs less

equation:

C

R

2

1

f

I

I

C

π

=

the specification calls for a flat bass response are down to 150Hz. Equation is reconfigured as followed:

IFC

I

R

2

1

C

π

=

voltage at the input to the amplifier that reduces useful headroom, especially in high gain applications. For this reason, a low-leakage tantalum or

ceramic capacitor is the best choice. When polarized capacitors are used, the positive side of the capacitor should face the amplifier input in

capacitor polarity in the application.