WM8750 datasheet(7/60 Pages) WOLFSON

7 / 60 page

Production Data

WM8750BL

PD, Rev 4.1, August 2012

Test Conditions

DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, TA = +25

oC, 1kHz signal, fs = 48kHz, ADCOSR=1, DACOSR=1,

PGA gain = 0dB, 24-bit audio data unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Speaker Output (LOUT2/ROUT2 with 8

 bridge tied load, ROUT2INV=1)

Output Power at 1% THD

THD = 1%

330

mW (rms)

Maximum Achievable Output

Power

POmax

AVDD=HPVDD=3.3V,

RL=8

400

mW (rms)

Total Harmonic Distortion

THD

Po=200mW, RL=8,

HPVDD=3.3V

-60

0.1

Signal to Noise Ratio

(A-weighted)

SNR

HPVDD=3.3V, RL=8

Analogue Reference Levels

Midrail Reference Voltage

VMID

–3%

AVDD/2

+3%

Buffered Reference Voltage

VREF

–3%

AVDD/2

+3%

Microphone Bias

Bias Voltage

VMICBIAS

3mA load current

–5%

0.9

AVDD

+ 5%

Bias Current Source

IMICBIAS

Output Noise Voltage

1K to 20kHz

nV/

Hz

Digital Input / Output

Input HIGH Level

VIH

0.7

DBVDD

Input LOW Level

VIL

0.3

DBVDD

Output HIGH Level

VOH

IOH = +1mA

0.9

DBVDD

Output LOW Level

VOL

IOL = -1mA

0.1

DBVDD

HPDETECT (pin 23)

Input HIGH Level

VIH

0.7

AVDD

Input LOW Level

VIL

0.3

AVDD

WM8750 Datasheet(PDF) 7 Page - Wolfson Microelectronics plc

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