WM8976GEFL/V Ver la hoja de datos (PDF) - Wolfson Microelectronics plc

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WM8976GEFL/V

Stereo CODEC With Speaker Driver

Wolfson Microelectronics plc 

WM8976

Pre-Production

Test Conditions

DCVDD=1.8V, AVDD=DBVDD=SPKVDD= 3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise

stated.

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital to Analogue Converter (DAC) to Line-Out (LOUT1, ROUT1 with 10kΩ / 50pF load)

Full-scale output

PGA gains set to 0dB,

OUT34BOOST=0

AVDD/3.3

Vrms

PGA gains set to 0dB,

1.5x

OUT34BOOST=1

(AVDD/3.3)

Signal to Noise Ratio (Note 6)

SNR

A-weighted

98

dB

Total Harmonic Distortion

THD

RL = 10kΩ

-84

dB

(Note 7)

full-scale signal

Channel Separation (Note 9)

1kHz signal

110

dB

Output Mixers (LMX1, RMX1)

PGA gain range into mixer

-15

0

+6

dB

PGA gain step into mixer

3

dB

Analogue Outputs (LOUT1, ROUT1, LOUT2, ROUT2)

Programmable Gain range

-57

0

+6

dB

Programmable Gain step size

Monotonic

1

dB

Mute attenuation

1kHz, full scale signal

85

dB

Headphone Output (LOUT1, ROUT1 with 32Ω load)

0dB full scale output voltage

AVDD/3.3

Vrms

Signal to Noise Ratio

SNR

A-weighted

102

dB

Total Harmonic Distortion

THD

RL = 16Ω, Po=20mW

0.003

%

AVDD=3.3V

-92

dB

RL = 32 Ω, Po=20mW

0.008

%

AVDD=3.3V

- 82

dB

Speaker Output (LOUT2, ROUT2 with 8Ω bridge tied load, INVROUT2=1)

Full scale output voltage, 0dB

gain. (Note 9)

SPKBOOST=0

SPKBOOST=1

SPKVDD/3.3

(SPKVDD/3.3)*1.5

Vrms

Output Power

Total Harmonic Distortion

PO

THD

Output power is very closely correlated with THD; see below

PO =200mW, RL = 8Ω,

0.04

%

SPKVDD=3.3V

-68

dB

PO =320mW, RL = 8Ω,

1.0

%

SPKVDD=3.3V

-40

dB

PO =500mW, RL = 8Ω,

0.02

%

SPKVDD=5V

-74

dB

PO =860mW, RL = 8Ω,

1.0

%

SPKVDD=5V

-40

dB

Signal to Noise Ratio

SNR

SPKVDD=3.3V,

90

dB

RL = 8Ω

SPKVDD=5V,

90

dB

RL = 8Ω

Power Supply Rejection Ratio

PSRR

RL = 8Ω BTL

80

dB

(50Hz-22kHz)

RL = 8Ω BTL

69

dB

SPKVDD=5V (boost)

OUT3/OUT4 outputs (with 10kΩ / 50pF load)

Full-scale output voltage, 0dB

gain (Note 9)

OUT3BOOST=0/

OUT4BOOST=0

SPKVDD/3.3

Vrms

OUT3BOOST=1

(SPKVDD/3.3)*1.5

Vrms

OUT4BOOST=1

Signal to Noise Ratio (Note 6)

SNR

A-weighted

98

dB

Total Harmonic Distortion

THD

RL = 10 kΩ

-84

dB

(Note 7)

full-scale signal

Channel Separation (Note 8)

1kHz signal

100

dB

w

PP Rev 3.0 April 2006

8

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