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.
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| Part | Resolution (bits) | Dynamic Range (dB) | THD+N (dB) | Sample Rate (kHz) | Analog I/O | Power Supply (V) | Type | Comments |  Package |
|---|---|---|---|---|---|---|---|---|---|
| CS42L73(detail) | 24 | 91 ADC; 97 DAC |
-85 | 48 | Pseudo-differential | VA/VCP/VL = 1.66 to 1.94; VP = 3 to 5.25; VD = 0.85 to 1.40 |
Stereo | 2 ADCs, 4 DACs, Class-H HP, Class A/B speaker driver, 3x asynchronous serial ports | 64 WLCSP 65 FBGA |
| Part | Power (W) | Dynamic Range (dB) | THD+N (%) | Channels | Power Supply (V) | Comments | Package |
|---|---|---|---|---|---|---|---|
| CS35L00(detail) | 3 | 98 | 0.02 | 1 | = 2.5 to 5.5 | Hybrid Class-D architecture, <1mA quiescent current | 10 DFN |
| CS35L01(detail) | 3 | 98 | 0.02 | 1 | = 2.5 to 5.5 | Hybrid Class-D architecture, <1mA quiescent current | 9 WLCSP |
| CS35L03(detail) | 3 | 98 | 0.02 | 1 | = 2.5 to 5.5 | Hybrid Class-D architecture, <1mA quiescent current | 9 WLCSP |
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