CS43L21 datasheet(2/63 Pages) CIRRUS

2 / 63 page

DS723A1

CS43L21

APPLICATIONS

Portable Audio Players

MD Players

PDAs

Personal Media Players

Portable Game Consoles

Smart Phones

Wireless Headsets

GENERAL DESCRIPTION

The CS43L21 is a highly integrated, 24-bit, 96 kHz, low

power stereo DAC. Based on multi-bit, delta-sigma

modulation, it allows infinite sample rate adjustment be-

tween 4 kHz and 96 kHz. The DAC offers many features

suitable for low power, portable system applications.

The DAC output path includes a digital signal process-

ing engine. Tone Control provides bass and treble

adjustment of four selectable corner frequencies. The

Mixer allows independent volume control for PCM mix,

as well as a master digital volume control for the analog

output. All volume level changes may be configured to

occur on soft ramp and zero cross transitions. The DAC

also includes de-emphasis, limiting functions and a

beep generator delivering tones selectable across a

range of two full octaves.

The stereo headphone amplifier is powered from a sep-

arate positive supply and the integrated charge pump

provides a negative supply. This allows a ground-cen-

tered analog output with a wide signal swing and

eliminates external DC-blocking capacitors.

In addition to its many features, the CS43L21 operates

from a low-voltage analog and digital core, making this

DAC ideal for portable systems that require extremely

low power consumption in a minimal amount of space.

The CS43L21 is available in a 32-pin QFN package in

both Commercial (-10 to +70° C) and Automotive

grades (-40 to +85° C). The CS43L21 Customer Dem-

onstration board is also available for device evaluation

and implementation suggestions. Please see “Ordering

Information” on page 63 for complete details.

CS43L21 数据表(PDF) 2 Page - Cirrus Logic

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