Datasheet Maxim MAX9700A — 数据表

Click here for production status of specific part numbers. MAX9700 1.2W, Low-EMI, Filterless,
Class D Audio Amplifier General Description Features The MAX9700 offers two modulation schemes: a fixedfrequency (FFM) mode, and a spread-spectrum (SSM)
mode that reduces EMI-radiated emissions due to the
modulation frequency. Furthermore, the MAX9700 oscillator
can be synchronized to an external clock through the
SYNC input, allowing the switching frequency to be user
defined. The SYNC input also allows multiple MAX9700s
to be cascaded and frequency locked, minimizing
interference due to clock intermodulation. The device
utilizes a fully differential architecture, a full-bridged
output, and comprehensive click-and-pop suppression.
The gain of the MAX9700 is set internally (MAX9700A:
6dB, MAX9700B: 12dB, MAX9700C: 15.6dB, MAX9700D:
20dB), further reducing external component count. Ordering Information The MAX9700 mono class D audio power amplifier
provides class AB amplifier performance with class D
efficiency, conserving board space and extending battery
life. Using a class D architecture, the MAX9700
delivers 1.2W into an 8Ω load while offering efficiencies
above 90%. A low-EMI modulation scheme renders the
traditional class D output filter unnecessary. The MAX9700 features high 72dB PSRR, a low 0.01%
THD+N, and SNR in excess of 90dB. Short-circuit and
thermal-overload protection prevent the device from
damage during a fault condition. The MAX9700 is available …