CS42L55-CNZ Cirrus Logic Inc, CS42L55-CNZ Datasheet - Page 25

• Manufacturer Part Number: CS42L55-CNZ
• Description: IC CODEC STER H-HDPN AMP 36QFN
• Manufacturer: Cirrus Logic Inc
• Type: Stereo Audior

Specifications of CS42L55-CNZ

• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 1 / 1
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 95 / 99
• Voltage - Supply, Analog: 1.65 V ~ 2.71 V
• Voltage - Supply, Digital: 1.65 V ~ 2.71 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-QFN
• Audio Codec Type: Stereo
• No. Of Adcs: 2
• No. Of Dacs: 2
• No. Of Input Channels: 3
• No. Of Output Channels: 3
• Adc / Dac Resolution: 24bit
• Sampling Rate: 48kSPS
• Ic Interface Type: I2C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1506 - BOARD EVAL FOR CS42L55 CODEC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 598-1629

DS773F1
4.3
Analog In to Analog Out Passthrough
The CS42L55 accommodates analog routing of the analog input signal directly to the headphone and line
out amplifiers. This feature is useful in applications that utilize an FM tuner where audio recovered over-the-
air must be transmitted to the headphone amplifier without digital conversion in the ADC and DAC. This an-
alog passthrough path reduces power consumption and is immune to modulator switching noise that could
interfere with some tuners. This path is selected using the Line and/or HP mux bits and powering down the
ADC.
Referenced Control
PDN_ADCx .........................
HPxMUX..............................
LINExMUX...........................
Referenced Control
PGAxVOL[5:0] .....................
ADCxATT[7:0] ......................
MAX[2:0], MIN[2:0] ..............
below full scale
Input (before ALC)
below full scale
MIN[2:0]
MIN[2:0]
Response
(after ALC)
Output
ALC
Register Location
“Power Down ADC x” on page 42
“Headphone Input Select” on page 47
“Line Input Select” on page 47
Register Location
“PGAx Volume” on page 49
“ADCx Volume” on page 50
“ALC Threshold (Address 26h)” on page 64
PGA Gain and/or
Attenuator
Figure 11. ALC Operation
RRATE[5:0]
ARATE[5:0
]
MAX[2:0]
below full scale
MAX[2:0]
below full scale
CS42L55
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