WM8971L(2005) 查看數據表（PDF） - Wolfson Microelectronics plc

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WM8971L
(Rev.:2005)

Stereo CODEC for Portable Audio Applications

Wolfson Microelectronics plc 

WM8971L

Production Data

Test Conditions

DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio

data unless otherwise stated.

PARAMETER

SYMBOL TEST CONDITIONS

MIN

Speaker Output (LOUT2/ROUT2 with 8Ω bridge tied load, ROUT2INV=1)

Output Power at 1% THD

PO

THD = 1%

Abs. Max Power Output

POmax

Total Harmonic Distortion

THD

Po=200mW, RL=8Ω,

HPVDD=3.3V

TYP

330

500

-63

0.07

MAX

UNIT

mW (rms)

mW (rms)

dB

%

Signal to Noise Ratio

(A-weighted)

Analogue Reference Levels

Midrail Reference Voltage

Buffered Reference Voltage

Microphone Bias

Bias Voltage

Bias Current Source

Output Noise Voltage

Digital Input / Output

Input HIGH Level

Input LOW Level

Output HIGH Level

Output LOW Level

HPDETECT (pin 23)

Input HIGH Level

Input LOW Level

SNR

HPVDD=3.3V, RL=8Ω

95

dB

VMID

VREF

VMICBIAS

IMICBIAS

Vn

VIH

VIL

VOH

VOL

VIH

VIL

–3%

AVDD/2

+3%

V

–3%

AVDD/2

+3%

V

3mA load current

1K to 20kHz

–5%

0.9×AVDD

15

+ 5%

3

V

mA

nV/√Hz

IOH = +1mA

IOL = -1mA

0.7×DBVDD

0.9×DBVDD

V

0.3×DBVDD

V

V

0.1×DBVDD

V

0.7×AVDD

V

0.3×AVDD

V

w

PD Rev 4.1 August 2005

8

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