CDB5345 데이터 시트보기 (PDF) - Cirrus Logic

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CDB5345

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

Cirrus Logic 

CS5345

AIN1A

AIN1B

AGND

VA

AFILTA

AFILTB

VQ

TSTO

FILT+

TSTO

AIN4A/MICIN1

AIN4B/MICIN2

AIN5A

AIN5B

MICBIAS

AIN6A

AIN6B

PGAOUTA

PGAOUTB

VA

AGND

NC

TSTO

VLS

TSTI

NC

SDOUT

SCLK

LRCK

MCLK

DGND

VD

INT

OVFL

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

12 specification table.

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

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

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

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

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

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

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

20 Test Pin - This pin must be left unconnected.

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

22 Analog Characteristics specification table.

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

24 specification table.

25

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

teristics are specified in the DC Electrical Characteristics specification table.

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

27 specification table.

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 33.

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

31

32

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

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

34 potential coupling effects.

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

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.

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

38,

39,

40

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

potential coupling effects.

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

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

43

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

serial audio data line.

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

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

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

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

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

6

DS658F2

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