WM8956GEFL(2007) Ver la hoja de datos (PDF) - Wolfson Microelectronics plc

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componentes Descripción

Fabricante

WM8956GEFL
(Rev.:2007)

Hi-Fi DAC with 1W Stereo Class D Speaker Drivers and Headphone Drivers

Wolfson Microelectronics plc 

WM8956

Preliminary Technical Data

Test Conditions

DCVDD = 1.8V, DBVDD = 3.3V, AVDD = SPKVDD1 = SPKVDD2 = 3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, PGA gain =

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

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

Headphone Outputs (HP_L, HP_R)

0dB Full scale output voltage

AVDD/3.3

Vrms

Mute attenuation

1kHz, full scale signal

86

dB

Channel Separation

L/RINPUT3 to headphone

110

dB

outputs via bypass

DAC to Line-Out (HP_L, HP_R, OUT3 with 10kΩ / 50pF load)

Signal to Noise Ratio

SNR

AVDD=3.3V

99

dB

(A-weighted)

AVDD=2.7V

98

Total Harmonic Distortion Plus

Noise

THD+N

AVDD=3.3V

AVDD=2.7V

-85

dB

-90

Total Harmonic Distortion

THD

AVDD=3.3V

-87

dB

AVDD=2.7V

-92

Channel Separation

1kHz full scale signal

110

dB

Headphone Output (HP_L, HP_R, using capacitors unless otherwise specified)

Output Power per channel

Total Harmonic Distortion +

Noise

PO

THD+N

Output power is very closely correlated with THD; see below.

AVDD=2.7V, RL=32Ω

-78

dB

PO=5mW

0.013

%

AVDD=2.7V, RL=16Ω

PO=5mW

-75

0.018

AVDD=3.3V, RL=32Ω,

PO=20mW

-72

0.025

AVDD=3.3V, RL=16Ω,

PO=20mW

-70

0.032

Signal to Noise Ratio

SNR

AVDD = 3.3V

92

99

dB

(A-weighted)

AVDD = 2.7V

98

Speaker Outputs (SPK_LP, SPK_LN, SPK_RP, SPK_RN with 8Ω bridge tied load)

Output Power

PO

Output power is very closely correlated with THD; see below

Total Harmonic Distortion + Noise THD+N PO =200mW, RL = 8Ω,

-78

dB

(DAC to speaker outputs)

SPKVDD1=SPKVDD2

0.013

%

=3.3V; AVDD=3.3V

PO =320mW, RL = 8Ω,

-72

dB

SPKVDD1=SPKVDD2

0.025

%

=3.3V; AVDD=3.3V

PO =500mW, RL = 8Ω,

-75

dB

SPKVDD1=SPKVDD2

0.018

%

=5V; AVDD=3.3V

PO =1W, RL = 8Ω,

-70

dB

SPKVDD1=SPKVDD2

0.032

%

=5V; AVDD=3.3V

Total Harmonic Distortion + Noise THD+N PO =200mW, RL = 8Ω,

-78

dB

(LINPUT3 and RINPUT3 to

SPKVDD1=SPKVDD2

0.013

%

speaker outputs)

=3.3V; AVDD=3.3V

PO =320mW, RL = 8Ω,

-72

dB

SPKVDD1=SPKVDD2

0.025

%

=3.3V; AVDD=3.3V

PO =500mW, RL = 8Ω,

-75

dB

SPKVDD1=SPKVDD2

0.018

%

=5V; AVDD=3.3V

PO =1W, RL = 8Ω,

-70

dB

SPKVDD1=SPKVDD2

0.032

%

=5V; AVDD=3.3V

w

PTD, July 2007, Rev 2.1

8

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