CS4222-KS Cirrus Logic Inc, CS4222-KS Datasheet - Page 9

• Manufacturer Part Number: CS4222-KS
• Description: Audio CODECs IC 20-Bit Stereo Codec w/Vol Cntrl
• Manufacturer: Cirrus Logic Inc

Specifications of CS4222-KS

• Number Of Adc Inputs: 2
• Number Of Dac Outputs: 2
• Conversion Rate: 48 KSPs
• Interface Type: Serial (I2C, SPI)
• Resolution: 20 bit
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Minimum Operating Temperature: - 10 C
• Number Of Channels: 2 ADC, 2 DAC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FUNCTIONAL DESCRIPTION
Overview
The CS4222 has 2 channels of 20-bit analog-to-
digital conversion and 2 channels of 20-bit
digital-to-analog conversion. All ADCs and
DACs are delta-sigma converters. The DAC out-
puts have adjustable output attenuation
implemented in 0.5 dB step resolution. The de-
vice also includes a soft mute function and
digital de-emphasis for 32, 44.1, and 48 kHz.
Digital audio data for the DACs and from the
ADCs is communicated over separate serial
ports. This allows concurrent writing to and
reading from the device. Control for the func-
tions available on the CS4222 are communicated
over a serial microcontroller interface. Figure 1
shows the recommended connection diagram for
the CS4222.
The device can be operated with or without the
control port interface. Additional functions are
available when the control port interface is used
as outlined in Table 1.
DS236PP3
Figure 2. Optional Line Input Buffer
Analog Inputs
Line Level Inputs
AINR-, AINR+, AINL-, and AINL+ are the dif-
ferential line level input pins (See Figure 1).
Figure 2 shows an AC coupled optional input
buffer which combines level shifting with single-
ended to differential conversion. Analog inputs
must be DC coupled into the CS4222 with a
2.3V common mode input voltage. Any DC off-
Enable zero crossing detect
Disable mute on zero input
Individual ADC/DAC power
Adjustable Mute ramp rate
High pass enable/disable
16, 18, 20 bit Interface
ADC Input Peak Level
Mute DAC outputs
Cal on command
Volume control
Table 1. Control Port vs. Stand-alone
Control Port
De-emphasis
Detect
down
Fixed Mute ramp rate
Codec power down
20 bit I
High pass enabled
Mute DAC outputs
Cal on power-up
De-emphasis
Stand-alone
Disabled
Enabled
2
S Interface
CS4222
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