cs5331a Cirrus Logic, Inc., cs5331a Datasheet - Page 3

• Manufacturer Part Number: cs5331a
• Description: 8-pin, Stereo A/d Converter For Digital Audio
• Manufacturer: Cirrus Logic, Inc.

DS138F5
1. PIN DESCRIPTIONS
Pin Name
SDATA
SCLK
LRCK
MCLK
AINR
AGND
VA+
AINL
SERIAL DATA OUTPUT
SERIAL DATA CLOCK
LEFT/RIGHT CLOCK
#
1
2
3
4
5
6
7
8
MASTER CLOCK
Pin Description
Audio Serial Data Output (Output) - Two’s complement MSB-first serial data is output on this
pin. A 47 kΩ resistor on this pin will place the CS5330A/31A into Master Mode.
Serial Data Clock (Input/Output) - SCLK is an input clock at any frequency from 32x to 64x the
output word rate. SCLK can also be an output clock at 64x if in the Master Mode. Data is
clocked out on the falling edge of SCLK.
Left/Right Clock (Input/Output) - LRCK selects the left or right channel for output on SDATA.
The LRCK frequency must be at the output sample rate. LRCK is an output clock if in Master
Mode. Although the outputs of each channel are transmitted at different times, the two words in
an LRCK cycle represent simultaneously sampled analog inputs.
Master Clock Input (Input) - Source for the delta-sigma modulator sampling and digital filter
clock. Sample rates and digital filter characteristics scale to the MCLK frequency.
Analog Right Channel Input (Input) - Analog input for the right channel. Typically 4 Vpp for a
full-scale input signal.
Analog Ground (Input) - Analog ground reference.
Positive Analog Power (Input) - Positive analog supply (Nominally +5 V).
Analog Left Channel Input (Input) - Analog input for the left channel. Typically 4 Vpp for a full-
scale input signal.
SDATA
MCLK
LRCK
SCLK
1
2
3
4
8
7
6
5
AINL
VA+
AGND
AINR
LEFT ANALOG INPUT
ANALOG POWER
ANALOG GROUND
RIGHT ANALOG INPUT
CS5330A/31A
3