Product Preview

WM8602

w

PP Rev 1.5 May 2004

7

Test Conditions

stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

PWM buffer drive strength

CMOS

25

4

mA

20pF load

25

4

mA

fs = 44.1kHz

352.8

kHz

PWM pulse repetition rate

fs = 48kHz

384

kHz

Notes:

1.

Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’

weighted over a 20Hz to 20kHz bandwidth.

2.

All performance measurements done with 20kHz AES17 low pass filter, except where noted an A-weight filter is used.

Failure to use such a filter will result in higher THD+N and lower SNR and Dynamic Range 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.

3.

The XIN input supports both a clock as well as a crystal input.

4.

Parameter guaranteed by design.

5.

Validated using the following filter

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Filter

Stopband

-3dB

1.00

kHz

Note: A third order differential RC filter has been used

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.

2.

Dynamic range (dB) - DNR 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.

POWER CONSUMPTION

MODE DESCRIPTION

TYPICAL SUPPLY CURRENTS

[mA]

TOTAL CURRENT

[mA]

TOTAL POWER

[mW]

AVDD, DVDD, BVDD = 3.3V

OFF

0

0

0

0

0

Standby

0.02

0.28

0

0.30

0.99

Mute

1.76

27.2

7.55

36.5

121

Stereo

1.76

27.7

7.55

37.0

122

2.1

Table 1 Supply Current Consumption

Notes:

1.

2.

All figures are kHz 1kHz input sine wave @ 0dB.