WM8731SEFL Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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производитель

WM8731SEFL

Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates

Wolfson Microelectronics plc 

WM8731 / WM8731L

Production Data

ELECTRICAL CHARACTERISTICS – WM8731L

Test Conditions

AVDD, HPVDD, DBVDD = 1.8V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25oC, Slave Mode, fs = 48kHz, XTI/MCLK =

256fs unless otherwise stated.

PARAMETER

SYMBOL

TEST

MIN

TYP

MAX

UNIT

CONDITIONS

Digital Logic Levels (CMOS Levels)

Input LOW level

VIL

0.3 x DBVDD

V

Input HIGH level

VIH

0.7 x DBVDD

V

Output LOW

VOL

0.10 x

V

DBVDD

Output HIGH

VOH

0.9 x DBVDD

V

Power On Reset Threshold (DCVDD)

DCVDD Threshold On -> Off

Vth

0.9

V

Hysteresis

VIH

0.3

V

DCVDD Threshold Off -> On

VOL

0.6

V

Analogue Reference Levels

Reference voltage (VMID)

Potential divider resistance

VVMID

RVMID

AVDD/2

V

50k

Ω

Line Input to ADC

Input Signal Level (0dB)

VINLINE

1.0

AVDD/3.3

Vrms

Signal to Noise Ratio

SNR

A-weighted, 0dB gain

75

85

dB

(Note 1,3)

@ fs = 48kHz

A-weighted, 0dB gain

85

@ fs = 96kHz

Dynamic Range (Note 3)

DR

A-weighted, -60dB full

80

88

dB

scale input

Total Harmonic Distortion

THD

-1dB input, 0dB gain

-76

-60

dB

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

Rsource < 50Ω

+12

dB

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 4.3 August 2006

11

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