WM9713 查看數據表（PDF） - Wolfson Microelectronics plc

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WM9713

AC’97 Audio + Touchpanel CODEC

Wolfson Microelectronics plc 

WM9713L

Pre-Production

ELECTRICAL CHARACTERISTICS

AUDIO OUTPUTS

Test Conditions

DBVDD=3.3V, DCVDD = 3.3V, AVDD=HPVDD=SPKVDD =3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless

otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DAC to Line-Out (HPL/R, SPKL/R or MONO with 10kΩ / 50pF load)

Full-scale output (0dBFS)

AVDD = 3.3V, PGA gains

1

set to 0dB

V rms

Signal to Noise Ratio

(A-weighted)

SNR

85

94

dB

Total Harmonic Distortion

THD

-3dB output

-85

-74

dB

Power Supply Rejection

PSRR

100mV, 20Hz to 20kHz

50

dB

signal on AVDD

Speaker Output (SPKL/SPKR with 8Ω bridge tied load, INV=1)

Output Power at 1% THD

PO

THD = 1%

Abs. max output power

POmax

Total Harmonic Distortion

THD

PO = 200mW

400

mW (rms)

500

mW (rms)

-66

dB

0.05

%

Signal to Noise Ratio

(A-weighted)

SNR

90

dB

Stereo Speaker Output (SPKL/OUT4 and SPKR/OUT3 with 8Ω bridge tied load, INV=1)

Output Power at 1% THD

PO

THD = 1%

400

Abs. max output power

POmax

500

Total Harmonic Distortion

THD

PO = 200mW

-66

0.05

mW (rms)

mW (rms)

dB

%

Signal to Noise Ratio

(A-weighted)

SNR

90

dB

Headphone Output (HPL/R, OUT3/4 or SPKL/SPKR with 16Ω or 32Ω load)

Output Power per channel

PO

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

Total Harmonic Distortion

THD

PO=10mW, RL=16Ω

-80

dB

PO=10mW, RL=32Ω

-80

PO=20mW, RL=16Ω

-78

PO=20mW, RL=32Ω

-79

Signal to Noise Ratio

SNR

90

dB

(A-weighted)

Note:

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

–80dB when output power is 10mW. Higher output power is possible, but will result in deterioration in THD.

w

PP Rev 3.0 June 2006

8

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