Smartphone Solutions

System Features

• Three independent serial ports with integrated asynch SRCs
• Native (no PLL required) support for 6/12/24 MHz, 13/26 MHz, and 19.2/38l4 MHz master
• High-speed I²C control port (400 kHz)

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Cirrus Logic Smartphone Solutions: CS42L73 and CS35L00/01/03

With a focus on lowering system power, improving battery life and reducing board space, Cirrus Logic has introduced two new ICs for smartphones and mobile applications: the CS42L73 smart audio CODEC and the CS35L0X family of hybrid Class D amplifiers.

The CS42L73 gives smartphone designers a better option for handing all audio-related tasks — reducing the burden of the system’s applications processor, lowering power consumption and subsequently improving battery life.

To meet the multiple challenges of delivering high-quality audio in a mobile handset application while keeping noise and power consumption low, the CS35L0X family of hybrid Class D audio amplifiers consume only 0.9mA of quiescent current, which is 40 percent less than the nearest competitor delivers, in an amazingly small 1.2 mm space. The amplifier family combines Class D efficiency and output power with low idle current consumption and minimal EMI found typically only in class AB amplifiers.