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CS43L22

Portable Audio DAC with Integrated Class D Speaker Driver

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.

Specifications Table

View Table

Documentation

CS43L22 Product Data Sheet
3/2010, DS792F2 : 672 Kb
CDB43L22 Evaluation Board Data Sheet
10/2007, DS792DB1 : 3992 Kb

Stereo DAC

High Performance Stereo DAC
- 98 dB Dynamic Range (A-wtd)
- -88 dB THD+N
- 4 kHz to 96 kHz Sample Rates
Digital Signal Processing Engine
- 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
- 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
- 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
- Battery Level Monitoring & Compensation
82% at 800 mW
Phase-Aligned PWM Output Reduces Idle Channel Current
Low Quiescent Current

Stereo Headphone Amplifier / Line Output

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

System Features

12, 24, and 27 MHz Master Clock Support in Addition to Typical Audio Clock Rates
High Performance 24-bit Converter
- Multi-bit Delta Sigma Architecture
- Very Low 64Fs Oversampling Clock Reduces Power Consumption
Low Power Operation
- Stereo Analog Passthrough: 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
- Master or Slave 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
Pop and Click Suppression