Cirrus Logic CS43L21 - Manual (Page 2)

2 DS723F1
CS43L21
GENERAL DESCRIPTION
The CS43L21 is a highly integrated, 24-bit, 96 kHz, low power stereo DAC. Based on multi-bit, delta-sigma modu-
lation, it allows infinite sample rate adjustment between 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 processing 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 mas-
ter 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 separate positive supply and the integrated charge pump pro-
vides a negative supply. This allows a ground-centered 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 Demonstration board is also available for device evaluation and implemen-
tation suggestions. Please see
“Ordering Information” on page 64 for complete details.