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

ELECTRICAL CHARACTERISTICS – WM8731

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.

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital Logic Levels (CMOS Levels)

Input LOW level

VIL

Input HIGH level

VIH

Output LOW

VOL

0.7 x DBVDD

0.3 x DBVDD

V

V

0.10 x

V

DBVDD

Output HIGH

VOH

0.9 x DBVDD

V

Power On Reset Threshold (DCVDD)

DCVDD Threshold On -> Off

Vth

Hysteresis

VIH

DCVDD Threshold Off -> On

VOL

Analogue Reference Levels

0.9

V

0.3

V

0.6

V

Reference voltage (VMID)

Potential divider resistance

Line Input to ADC

VVMID

RVMID

AVDD/2

V

50k

Ω

Input Signal Level (0dB)

VINLINE

1.0

AVDD/3.3

Vrms

Signal to Noise Ratio

SNR

A-weighted, 0dB gain

85

90

dB

(Note 1,3)

@ fs = 48kHz

A-weighted, 0dB gain

90

@ fs = 96kHz

A-weighted, 0dB gain

88

@ fs = 48kHz,

AVDD = 2.7V

Dynamic Range (Note 3)

DR

A-weighted, -60dB full

85

90

dB

scale input

Total Harmonic Distortion

THD

-1dB input, 0dB gain

-84

-74

dB

0.006

0.02

%

Power Supply Rejection Ratio

PSRR

1kHz, 100mVpp

50

dB

20Hz to 20kHz,

45

100mVpp

ADC channel separation

1kHz input

90

dB

Programmable Gain

1kHz input

-34.5

0

+12

dB

Rsource < 50Ω

Programmable Gain Step Size

Guaranteed Monotonic

1.5

dB

Mute attenuation

0dB, 1kHz input

80

dB

Input Resistance

RINLINE

0dB gain

20k

30k

Ω

12dB gain

10k

15k

Input Capacitance

CINLINE

10

pF

w

PD, Rev 4.9, October 2012

7

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