WM8988 Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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Компоненты Описание

производитель

WM8988

Stereo CODEC for Portable Audio Applications

Wolfson Microelectronics plc 

WM8988

Production Data

Test Conditions

DCVDD = 1.5V, DBVDD = 2.4V, AVDD = HPVDD =2.4V , TA = +25oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio

data unless otherwise stated.

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

HPVDD=3.3V, RL=32Ω,

PO=20mW

HPCOM=LCOM=0

0.010

-82

DACMIXBIAS=0

HPVDD=3.3V, RL=16Ω,

PO=20mW

HPCOM=LCOM=0

0.010

-80

DACMIXBIAS=0

Total Harmonic Distortion +

THD+N

HPVDD=1.8V, RL=32Ω

-80

dB

Noise

PO=5mW

HPCOM=LCOM=0

DACMIXBIAS=1

HPVDD=1.8V, RL=16Ω

-78

PO=5mW

HPCOM=LCOM=0

DACMIXBIAS=1

HPVDD=2.4V, RL=32Ω,

-79

PO=5mW

HPCOM=LCOM=1

DACMIXBIAS=1

HPVDD=2.4V, RL=16Ω,

PO=5mW

HPCOM=LCOM=1

-77

-65

DACMIXBIAS=1

HPVDD=3.3V, RL=32Ω,

-80

PO=20mW

HPCOM=LCOM=0

DACMIXBIAS=0

HPVDD=3.3V, RL=16Ω,

-78

PO=20mW

HPCOM=LCOM=0

DACMIXBIAS=0

Signal to Noise Ratio

SNR

HPVDD = 3.3V

100

dB

(A-weighted)

HPCOM=LCOM=0

DACMIXBIAS=1

HPVDD = 2.4V

90

96

HPCOM=LCOM=1

DACMIXBIAS=1

HPVDD = 1.8V

96

HPCOM=LCOM=0

DACMIXBIAS=0

Headphone Output Ground

10mV, 20kHz noise on HPCOM,

40

dB

noise rejection

HPCOM enabled

Line Output Ground Noise

10mV, 20kHz noise on LCOM,

40

dB

Rejection

LCOM enabled

Analogue Reference Levels

Midrail Reference Voltage

VMID

–3% AVDD/2

+3%

V

Buffered Reference Voltage

VREF

–3% AVDD/2

+3%

V

Digital Input / Output

Input HIGH Level

VIH

0.7×DB

V

VDD

Input LOW Level

VIL

0.3×DBVDD

V

w

PD, Rev 4.0, October 2008

8

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