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

Número de pieza

componentes Descripción

Fabricante

WM8956GEFL
(Rev.:2007)

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

Wolfson Microelectronics plc 

Preliminary Technical Data

WM8956

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

Signal to Noise Ratio

(A-weighted)

(DAC to speaker outputs)

Signal to Noise Ratio

(A-weighted)

(LINNPUT3 and RINPUT3 to

speaker outputs)

Speaker Supply Leakage current

Power Supply Rejection Ratio

(100mV ripple on

SPKVDD1/SPKVDD2 @217Hz)

Analogue Reference Levels

Midrail 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

Input capacitance

Input leakage

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

SNR

SPKVDD1=SPKVDD2

90

=3.3V; AVDD=3.3V;

RL = 8Ω, ref=2.0Vrms

SPKVDD1=SPKVDD2

92

=5V; AVDD=3.3V;

RL = 8Ω, ref=2.8Vrms

SNR

SPKVDD1=SPKVDD2

90

=3.3V; AVDD=3.3V;

RL = 8Ω, ref=2.0Vrms

SPKVDD1=SPKVDD2

92

=5V; AVDD=3.3V;

RL = 8Ω, ref=2.8Vrms

ISPKVDD

SPKVDD1=SPKVDD2

1

=5V;

All other supplies

disconnected

SPKVDD1=SPKVDD2

1

=5V;

All other supplies 0V

PSRR DAC to speaker playback

80

LINPUT3/RINPUT3 to

80

speaker playback

VMID

–3%

AVDD/2

+3%

VMICBIAS

IMICBIAS

Vn

3mA load current

MBSEL=1

3mA load current

MBSEL=0

1K to 20kHz

–5%

0.9×AVDD

+ 5%

–5% 0.65×AVDD + 5%

3

15

VIH

0.7×DBVDD

VIL

VOH

IOL=1mA

0.9×DBVDD

0.3×DBVDD

VOL

IOH-1mA

0.1×DBVDD

10

-0.9

0.9

UNIT

dB

dB

dB

dB

uA

uA

dB

dB

V

V

V

mA

nV/√Hz

V

V

V

V

pF

uA

w

PTD, July 2007, Rev 2.1

9

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