WM9712CLGEFLSLASHRV datasheet(7/78 Pages) WOLFSON

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Production Data

WM9712L

PD, Rev 4.6, November 2011

ELECTRICAL CHARACTERISTICS

AUDIO OUTPUTS

Test Conditions

DBVDD=3.3V, DCVDD = 3.3V, AVDD=HPVDD=SPKVDD =3.3V, TA = +25

oC, 1kHz signal, fs = 48kHz, 18-bit audio data unless

otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DAC to Line-Out (HPOUTL/R or MONOOUT with 10k

 / 50pF load)

Full-scale output

AVDD = 3.3V, PGA gains

set to 0dB

V rms

Signal to Noise Ratio

(A-weighted)

SNR

Total Harmonic Distortion

THD

-3dB output

-87

-80

Power Supply Rejection

PSRR

100mV, 20Hz to 20kHz

signal on AVDD

Speaker Output (LOUT2/ROUT2 with 8

 bridge tied load, INV=1)

Output Power

Output power is very closely correlated with THD; see below.

Output Power at 1% THD

400

Abs. Max Output Power

POmax

500

Total Harmonic Distortion

THD

PO=200mW

-66

0.05

Signal to Noise Ratio

(A-weighted)

SNR

100

Headphone Output (HPOUTL/R, OUT3 or LOUT2/ROUT2 with 16

 or 32 load)

Output Power per channel

Output power is very closely correlated with THD; see below.

Total Harmonic Distortion

THD

PO=10mW, RL=16

-76

PO=10mW, RL=32

-73

PO=20mW, RL=16

-75

-70

PO=20mW, RL=32

-78

Signal to Noise Ratio

(A-weighted)

SNR

Note:

All THD values are valid for the output power level quoted above – for example, at HPVDD=3.3V and RL=16, THD is

–76dB when output power is 10mW. Higher output power is possible, but will result in a deterioration in THD.

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