CS43L22 Portable Audio DAC with Integrated Class D Speaker Driver
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- In detail
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The CS43L22 is a highly integrated, low-power stereo digital/analog converter (DAC) with headphone and Class D speaker amplifiers. The DAC output path includes a digital signal processing engine with various fixed-function controls, such as tone and volume control. The DAC also includes de-emphasis, limiting functions and beep generator that delivers tones selectable across a range of two octaves.
The stereo headphone amplifier is powered from a separate positive supply and the integrated charge pump provides a negative supply, allowing for a ground-centered analog output that eliminates the need for DC blocking capacitors. The Class D stereo speaker, which does not require an external filter, may be powered directly from a battery.
The CS43L22 accommodates analog routing of the input signal directly to the headphone amplifier — a useful feature for applications that utilize an FM tuner. The CS43L22 operates from a low-voltage analog and digital core, making it ideal for portable systems that require extremely low power consumption in a minimal amount of space.
Stereo DAC
- High Performance Stereo DAC
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- 98 dB Dynamic Range (A-wtd)
- -88 dB THD+N
- 4 kHz to 96 kHz Sample Rates
- Digital Signal Processing Engine
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- Bass & Treble Tone Control
- Soft-Ramp & Zero-Cross Transitions
- Programmable Peak-Detect and Limiter
- Beep Generator w/Full Tone Control
Class D Stereo/Mono Speaker Amplifier
- No External Filter Required
- High Stereo Output Power at 10% THD+N
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- 2 x 1.00 W into 8 Ω @ 5.0 V
- 2 x 550 mW into 8 Ω @ 3.7 V
- 2 x 230 mW into 8 Ω @ 2.5 V
- High Mono Output Power at 10% THD+N
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- 1 x 1.90 W into 4 Ω @ 5.0 V
- 1 x 1.00 W into 4 Ω @ 3.7 V
- 1 x 350 mW into 4 Ω @ 2.5 V
- Direct Battery Powered Operation
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- Battery Level Monitoring & Compensation
- 82% at 800 mW
- Phase-Aligned PWM Output Reduces Idle Channel Current
- Low Quiescent Current