WM8731SEDS/RV データシートの表示（PDF） - Cirrus Logic

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WM8731SEDS/RV

Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates

Cirrus Logic 

WM8731 / WM8731L

Production Data

Test Conditions

AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25oC, Slave Mode, fs = 48kHz, XTI/MCLK =

256fs unless otherwise stated.

Microphone Input to ADC @ 0dB Gain, fs = 48kHz (40kΩ Source Impedance. See Figure 12)

Input Signal Level (0dB)

VINMIC

1.0

AVDD/3.3

Vrms

Signal to Noise Ratio

SNR

A-weighted, 0dB gain

85

dB

(Note 1,3)

Dynamic Range (Note 3)

DR

A-weighted, -60dB full

85

dB

scale input

Total Harmonic Distortion

THD

0dB input, 0dB gain

-60

-55

dB

Power Supply Rejection Ratio

PSRR

1kHz 100mVpp

50

dB

20Hz to 20kHz

45

dB

100mVpp

Programmable Gain Boost

MICBOOST bit

1kHz input

34

dB

set

Rsource < 50Ω

Mic Path gain (MICBOOST gain

MICBOOST = 0

14

dB

is additional to this nominal

gain)

Rsource < 50Ω

Mute attenuation

0dB, 1kHz input

80

dB

Input Resistance

Input Capacitance

Microphone Bias

RINMIC

CINMIC

10k

Ω

10

pF

Bias Voltage

VMICBIAS

0.75*AVDD – 0.75*AVDD 0.75*AVDD +

V

100mV

100mV

Bias Current Source

Output Noise Voltage

IMICBIAS

Vn

1K to 20kHz

3

mA

25

nV/Hz

Line Output for DAC Playback Only (Load = 10kΩ. 50pF)

0dBfs Full scale output voltage

At LINE outputs

1.0 x

Vrms

AVDD/3.3

Signal to Noise Ratio

SNR

A-weighted,

95

100

dB

(Note 1,3)

@ fs = 48kHz

A-weighted

98

@ fs = 96kHz

A-weighted,

98

fs = 48kHz,

AVDD = 2.7V

Dynamic Range (Note 3)

DR

A-weighted, -60dB

85

95

dB

full scale input

Total Harmonic Distortion

THD

1kHz, 0dBfs

-88

-80

dB

1kHz, -3dBfs

-92

Power Supply Rejection Ratio

PSRR

1kHz 100mVpp

50

dB

20Hz to 20kHz

45

100mVpp

DAC channel separation

1kHz, 0dB

100

dB

Analogue Line Input to Line Output (Load = 10kΩ. 50pF, No Gain on Input ) Bypass Mode

0dB Full scale output voltage

1.0 x

Vrms

AVDD/3.3

Signal to Noise Ratio

SNR

90

95

dB

(Note 1,3)

Total Harmonic Distortion

THD

1kHz, 0dB

-86

-80

dB

1kHz, -3dB

-92

Power Supply Rejection Ratio

PSSR

1kHz 100mVpp

50

dB

20Hz to 20kHz

45

100mVpp

w

PD, Rev 4.9, October 2012

8

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