WM9710

Production Data

w

PD Rev 4.0 December 2003

8

Test Characteristics:

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Mixer Inputs to Line-out (10k

Ω

Ω

Ω

Ω load)

Maximum input voltage

AGND

0.7

AVDD

Vrms

Maximum output voltage

on LINEOUT

0.7

Vrms

CD inputs

90

92

Signal to Noise Ratio

A-weighted (Note 2)

SNR

Other inputs

82

93

dB

CD and LINE inputs

-87

0.0044

-77

0.014

PHONE input

-82

0.008

-71

0.028

MIC1 input

-82

0.008

-71

0.028

MIC2 input

-90

0.003

-71

0.028

Total Harmonic Distortion +

Noise

-1dBfs input

THD+N

PCBEEP input

-78

0.013

-67

0.045

dB

%

Input impedance (CD inputs)

At any gain

15

k

Ω

At max gain

10

20

k

Ω

Input impedance (other mixer

inputs)

At 0db gain

50

100

k

Ω

At max gain

10

20

k

Ω

Input impedance MIC inputs

At 0db gain

55

100

k

Ω

Power Supply Rejection Ratio

PSRR

20 to 20kHz, without

supply decoupling

-40

dB

Headphone Buffer (pins HPOUTL, HPOUR and MONOOUT)

Maximum output voltage

0.7

Vrms

RL = 32

Ω

30

mW

Max Output Power (Note 1)

RL = 16

Ω

40

mW

SNR (Note 2)

A-weighted

85

92

dB

10mW rms

-80

0.01

dB

%

20mW rms

-77

0.014

dB

%

10mW rms

-76dB

0.016

dB

%

Total Harmonic Distortion +

Noise

THD+N

20mW rms

-75dB

0.018

dB

%

Power Supply Rejection Ratio

PSRR

20 to 20kHz, without

supply decoupling

-40

dB

Clocks

Crystal clock

24.576

MHz

BITCLK frequency

12.288

MHz

SYNC frequency

48.0

KHz

Note:

1.

Harmonic distortion on the headphone output decreases with output power – see Figure 3.

2.

SNR is the ratio of 0dB signal amplitude to noise floor with no signal present (all 0s input code to DACs).

3.

ADC sampling capacitance allows the user to calculate the minimum external capacitance required for a stable ADC value.