CDB5345(2004) View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CDB5345
(Rev.:2004)

105 dB, 24-Bit, 192 kHz Stereo Audio ADC

Cirrus Logic 

CS5345

AIN1A

AIN1B

11, Stereo Analog Input 1 (Input) - The full scale level is specified in the ADC Analog Characteristics

12 specification table.

AGND

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

VA

14 Analog Power (Input) - Positive power for the internal analog section.

AFILTA

15 Antialias Filter Connection (Output) - Antialias filter connection for the channel A ADC input.

AFILTB

16 Antialias Filter Connection (Output) - Antialias filter connection for the channel B ADC input.

VQ

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

TSTO

18 Test Pin (Output) - This pin must be left unconnected.

FILT+

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

TSTO

20 Test Pin - This pin must be left unconnected.

AIN4A/MICIN1 21, Stereo Analog Input 4 / Microphone Input 1 & 2 (Input) - The full scale level is specified in the ADC

AIN4B/MICIN2 22 Analog Characteristics specification table.

AIN5A

AIN5B

23, Stereo Analog Input 5 (Input) - The full scale level is specified in the ADC Analog Characteristics

24 specification table.

MICBIAS

25

Microphone Bias Supply (Output) - Low noise bias supply for external microphone. Electrical charac-

teristics are specified in the DC Electrical Characteristics specification table.

AIN6A

AIN6B

26, Stereo Analog Input 6 (Input) - The full scale level is specified in the ADC Analog Characteristics

27 specification table.

PGAOUTA

PGAOUTB

28, PGA Analog Audio Output (Output) - Either an analog output from the PGA block or high impedance.

29 See “PGAOut Source Select (Bit 6)” on page 31.

VA

30 Analog Power (Input) - Positive power for the internal analog section.

AGND

31,

32

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

NC

33, No Connect - These pins are not connected internally and should be tied to ground to minimize any

34 potential coupling effects.

TSTO

35 Test Pin (Output) - This pin must be left unconnected.

VLS

36 Serial Audio Interface Power (Input) - Determines the required signal level for the serial audio inter-

face. Refer to the Recommended Operating Conditions for appropriate voltages.

TSTI

37 Test Pin (Input) - This pin must be connected to ground.

38,

NC

39,

No Connect - These pins are not connected internally and should be tied to ground to minimize any

potential coupling effects.

40

SDOUT

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

SCLK

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

LRCK

43

Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on the

serial audio data line.

MCLK

44 Master Clock (Input/Output) -Clock source for the ADC’s delta-sigma modulators.

DGND

45 Digital Ground (Input) - Ground reference for the internal digital section.

VD

46 Digital Power (Input) - Positive power for the internal digital section.

INT

47 Interrupt (Output) - Indicates an interrupt condition has occurred.

OVFL

48 Overflow (Output) - Indicates an ADC overflow condition is present.

4

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