WM8523 datasheet(9/51 Pages) WOLFSON

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Production Data

WM8523

PD, Rev 4.1, August 2011

ELECTRICAL CHARACTERISTICS

Test Conditions

LINEVDD=AVDD=3.3V, LINEGND=AGND=0V, TA=+25

°C, Slave Mode, fs=48kHz, MCLK=256fs, 24-bit data, unless otherwise

stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Analogue Output Levels

Output Level

0dBFS

1.89

2.1

2.31

Vrms

Load Impedance

kΩ

Load Capacitance

No external RC filter

300

With filter shown in

Error! Reference

source not found.

μF

DAC Performance

Signal to Noise Ratio

SNR

RL = 10kΩ

A-weighted

100

106

RL = 10kΩ

Un-weighted

104

Dynamic Range

DNR

RL = 10kΩ

A-weighted

104

Total Harmonic Distortion

THD

RL = 10kΩ

-1dBFS

-89

RL = 10kΩ

0dBFS

-86

AVDD + LINEVDD

Power Supply Rejection Ratio

PSRR

100Hz

1kHz

20kHz

Channel Separation

1kHz

100

20Hz to 20kHz

System Absolute Phase

degrees

Channel Level Matching

0.1

Mute Attenuation

-120

DC Offset at LINEVOUTL and

LINEVOUTR

-1

Digital Logic Levels

Input HIGH Level

VIH

0.7

LINEVDD

Input LOW Level

VIL

0.3

LINEVDD

Output HIGH Level

VOH

IOL = 1mA

0.9

LINEVDD

Output LOW Level

VOL

IOH = -1mA

0.1

LINEVDD

Input Capacitance

Input Leakage

-0.9

0.9

μA

TERMINOLOGY

Signal-to-Noise Ratio (dB) – SNR is a measure of the difference in level between the maximum theoretical full scale output signal

and the output with no input signal applied.

Total Harmonic Distortion (dB) – THD is the level of the rms value of the sum of harmonic distortion products relative to the

amplitude of the measured output signal.

All performance measurements carried out with 20kHz low pass filter, and where noted an A-weighted filter. Failure to use such a

filter will result in higher THD and lower SNR readings than are found in the Electrical Characteristics. The low pass filter removes

out of band noise; although it is not audible it may affect dynamic specification values.

Mute Attenuation – This is a measure of the difference in level between the full scale output signal and the output with mute

applied.

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