CDB43L22 Ver la hoja de datos (PDF) - Cirrus Logic

Número de pieza

componentes Descripción

Fabricante

CDB43L22

Low Power, Stereo DAC w/Headphone & Speaker Amps

Cirrus Logic 

Confidential Draft

3/4/10

CS43L22

System Features

 12, 24, and 27 MHz Master Clock Support in

Addition to Typical Audio Clock Rates

 High Performance 24-bit Converters

– 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

– 1.6 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

– DAC, Passthrough Amplifier, Headphone

Amplifier, Speaker Amplifier

 Flexible Clocking Options

– Master or Slave Operation

– Quarter-Speed Mode - (i.e. allows 8 kHz Fs

while maintaining a flat noise floor up to 16 kHz)

– 4 kHz to 96 kHz Sample Rates

 I²CTM Control Port Operation

 Headphone/Speaker Detection Input

 Pop and Click Suppression

 Pin-Compatible w/CS42L52

Applications

 PDA’s

 Personal Media Players

 Portable Game Consoles

General Description

The CS43L22 is a highly integrated, low power stereo DAC

with headphone and Class D speaker amplifiers. The

CS43L22 offers many features suitable for low power, porta-

ble system applications.

The DAC output path includes a digital signal processing en-

gine with various fixed function controls. Tone Control

provides bass and treble adjustment of four selectable corner

frequencies. Digital Volume controls may be configured to

change on soft ramp transitions while the analog controls can

be configured to occur on every zero crossing. The DAC also

includes de-emphasis, limiting functions and a BEEP genera-

tor delivering tones selectable across a range of two full

octaves.

The stereo headphone amplifier is powered from a separate

positive supply and the integrated charge pump provides a

negative supply. This allows a ground-centered analog output

with a wide signal swing and eliminates the need for external

DC-blocking capacitors.

The Class D stereo speaker amplifier does not require an

external filter and provides the high efficiency amplification re-

quired by power sensitive portable applications. The speaker

amplifier may be powered directly from a battery while the in-

ternal DC supply monitoring and compensation provides a

constant gain level as the battery’s voltage decays.

The CS43L22 accommodates analog routing of the analog in-

put signal directly to the headphone amplifier. This feature is

useful in applications that utilize an FM tuner where audio re-

covered over-the-air must be transmitted to the headphone

amplifier directly.

In addition to its many features, 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.

The CS43L22 is available in a 40-pin QFN package in Com-

mercial (-40 to +85 °C) grade. The CS43L22 Customer

Demonstration board is also available for device evaluation

and implementation suggestions. Please refer to “Ordering In-

formation” on page 66 for complete ordering information.

2

DS792F2

Share Link: