CS42L56-CNZ View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CS42L56-CNZ

Ultralow Power, Stereo Codec with Class H Headphone Amp

Cirrus Logic 

CS42L56

-VHPFILT

HPOUTA

HPOUTB

HPREF

TSTN

LINEOUTA

LINEOUTB

LINEREF

VA

AGND

FILT+

VQ

AFILTA

AFILTB

MICBIAS

AIN1A

AIN1B

AIN2A

AIN2B

AIN1REF/AIN3A

AIN2REF/AIN3B

HPDETECT

RESET

VLDO

VDFILT

VL

SDOUT

MCLK

SCLK

GND/

Thermal Pad

11

Inverting Charge Pump Filter Connection (Output) - Power supply from the inverting charge

pump that provides the negative rail for the headphone and line amplifiers.

12 Headphone Audio Output (Output) - The full-scale output level is specified in “HP Output Charac-

14 teristics” on page 19.

13

Pseudo Diff. Headphone Output Reference (Input) - Ground reference for the headphone amplifi-

ers

15 Test Input (Input) - This pin is an input used for test purposes only and should be tied to ground for

16 normal operation.

17 Line Audio Output (Output) - The full-scale output level is specified in “Line Output Characteristics”

19 on page 20.

18 Pseudo Diff. Line Output Reference (Input) - Ground reference for the line amplifiers.

20 Analog Power (Input) - Power supply for the internal analog section.

21 Analog Ground (Input) - Ground reference for the internal analog section.

22 Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits.

23 Quiescent Voltage (Output) - Filter connection for the internal quiescent voltage.

24

25

Antialias Filter Connection (Output) - Antialias filter connection for the ADC inputs.

26 Microphone Bias (Output) - Low noise bias supply for an external microphone. Electrical character-

istics are specified in the DC Electrical Characteristics table.

27

29 Analog Inputs 1 & 2 (Input) - The full-scale level is specified in “Analog Input Characteristics” on

30 page 14.

32

28

31

Pseudo Differential Analog Input Reference/Analog Input 3 (Input) - Configurable as the ground

reference for the programmable gain amplifiers (PGA) or as additional analog inputs. The full-scale

level is specified in “Analog Input Characteristics” on page 14.

Headphone Detect (Input) - The HPDETECT circuit can be set to control the power down of the left

and/or right channel of the line and/or headphone outputs as described in “Headphone Power Con-

33 trol” on page 59 and “Line Power Control” on page 60 and/or cause an interrupt. This pin is

debounced such that the signal must remain stable in the new state for approximately 10 ms before

a change is passed on to the internal HPDETECT circuit.

34 Reset (Input) - The device enters a low power mode when this pin is driven low.

35 Low Dropout Regulator (LDO) Power (Input) - Power supply for the LDO regulator.

36

Low Dropout Regulator (LDO) Filter Connection (Output) - Power supply from the LDO regulator

that provides the low voltage power to the digital section.

37

Digital Interface Power (Input) - Determines the required signal level for the serial audio interface

and I²C control port.

38 Serial Audio Data Output (Output) - Output for two’s complement serial audio data.

39 Master Clock (Input) - Clock source for the delta-sigma modulators.

40 Serial Clock (Input/Output) - Serial clock for the serial audio interface.

- Ground reference for the internal charge pump and digital section; thermal relief pad.

DS851F2

9

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