Production Data

WM8711BL

w

PD, Rev 4.1, April 2007

7

Test Conditions

unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Stereo Headphone Output

0dB Full scale output voltage

AVDD/3.3

Vrms

AVDD=HPVDD=3.3V,

Ω

20

AVDD=HPVDD=1.8V,

Ω

9

Max Output Power

AVDD=HPVDD=1.8V,

Ω

18

mW

AVDD=HPVDD=3.3V

96

Signal to Noise Ratio

A-weighted (Note 1,2)

SNR

AVDD=HPVDD=1.8V

80

86

dB

AVDD=HPVDD=3.3V,

Ω

0.07

-63

Total Harmonic Distortion

THD

AVDD=HPVDD=1.8V,

Ω

0.05

-66

0.18

-55

%

dB

1kHz 100mVpp

50

Power Supply Rejection Ratio

PSRR

20Hz to 20kHz

100mVpp

45

dB

Programmable Gain

1kHz

-73

6

6

dB

Programmable Gain Step Size

1kHz

1

dB

Mute attenuation

1kHz, 0dB

80

dB

TERMINOLOGY

1.

Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full scale output and the output

with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).

2.

Dynamic range (dB) - DR is a measure of the difference between the highest and lowest portions of a signal. Normally

a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB to it. (e.g.

THD+N @ -60dB= -32dB, DR= 92dB).

3.

THD+N (dB) - THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.

4.

Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside audio band).

5.

Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from

the other. Normally measured by sending a full scale signal down one channel and measuring the other.

6.

Pass-Band Ripple - Any variation of the frequency response in the pass-band region.