Production Data

WM8711 / WM8711L

w

PD Rev 4.4 April 2007

10

Test Conditions

unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DAC channel separation

1kHz, 0dB signal

100

dB

Analogue Line Input to Line Output (Load = 10k

Ω. 50pF, No Gain on Input ) Bypass Mode

0dB Full scale output voltage

1.0 x

AVDD/3.3

Vrms

Signal to Noise Ratio

(Note 1,2)

SNR

90

101

dB

Total Harmonic Distortion

THD

1kHz, 0dB

-93

-85

dB

Stereo Headphone Output

0dB Full scale output voltage

1.0 x

AVDD/3.3

Vrms

RL = 32

Ω

9

Max Output Power

RL = 16

Ω

18

mW

Signal to Noise Ratio

(Note 1,2)

SNR

A-weighted

80

86

dB

Total Harmonic Distortion

THD

5mW rms

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.