Portable Audio DAC with Integrated Class D Speaker Driver
The CS43L22 is low power stereo digital/analog converter (DAC) with integrated headphone and Class D speaker amplifiers that operates from a low voltage analog and digital core. The DAC output path includes a digital signal processing engine with various fixed-function controls, such as tone and volume control, and 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 to eliminate the need for DC blocking capacitors. The Class D stereo speaker does not require an external filter and can be powered directly from a battery.
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Technology
Features
- Digital signal processing engine
- Bass, treble tone control
- Soft ramp, zero-cross transitions
- Programmable peak detect and limiter
- Beep generator with full tone control
- No external filter required
- Direct battery powered operation
- Battery level monitoring, compensation
- 82% at 800 mW
- Phase aligned PWM output reduces idle channel current
- Low quiescent current
- Ground-centered outputs
- Integrated charge pump
- No DC blocking capacitor required
- High power output at -75 dB THD+N
- 2 x 23 mW Into 16 Ω @ 1.8 V
- 2 x 44 mW Into 16 Ω @ 2.5 V
- 12, 24, and 27 MHz main clock support in addition to typical audio clock rates
- Low power operation
- Stereo analog pass through: 10 mW @ 1.8 V
- Stereo playback: 14 mW @ 1.8 V
- Variable power supplies
- 1.8 V to 2.5 V digital, analog
- 2.5 V to 5 V Class D amplifier
- 1.8 V to 2.5 V headphone amplifier
- 1.8 V to 3.3 V interface logic
- Power down management
- Flexible clocking options
- Main or secondary operation
- High impedance digital output option
- Quarter-speed mode (i.e. allows 8 kHz Fs while maintaining a flat noise floor up to 16 kHz)
- I²C control port operation
- Headphone/speaker detection input
Parametric Specifications
| Discontinued Product |
| Recommended Replacement: WM8962B |