WM3100 datasheet(5/13 Pages) WOLFSON

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Preliminary Technical Data

WM3100

PTD, October 2010, Rev 2.0

ELECTRICAL CHARACTERISTICS

Test Conditions

VDD=3.3V, GND=0V, TA = +25

oC, 1VRMS 1kHz sinusoidal input signal unless otherwise stated

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Analogue Inputs

Maximum full-scale input signal

level. (This changes in proportion

to VDD.)

VRMS

Input resistance

RIN

kΩ

Analogue Outputs

Full-scale output signal level. (This

changes in proportion to VDD.)

Full scale input signal, RL = 10kΩ

2.1

VRMS

DC offset

±3

Minimum load resistance

2.5

kΩ

Maximum load capacitance

Without external RC filter

220

With recommended external RC filter

μF

Audio Performance

Signal to Noise ratio

SNR

A-weighted, 20Hz to 20kHz

108

unweighted, 20Hz to 20kHz

104

Total Harmonic Distortion + Noise

(2.1VRMS output, 10kΩ load)

THD+N

Single-ended inverting input

-91

Single-ended non-inverting input

-95

Differential input

-92

Dynamic range

DNR

A-weighted, -60dBV input

108

Channel separation (L/R)

1kHz

20Hz to 20kHz

Channel level matching

1kHz

0.1

Channel phase deviation

1kHz

0.1

degree

Gain

6.2

6.4

6.6

Power Supply Rejection Ratio

(VDD)

PSRR

100mV pk-pk, 1kHz

100mV pk-pk, 20Hz to 20kHz

Mute attenuation

MUTE

¯¯¯¯¯ = 0

Output impedance

(high impedance mute state)

OUTMODE = 1

kΩ

Internal low-pass filter 3dB cut-off

300

kHz

Start-up time (from OFF)

200

μs

Start-up time (from MUTE)

100

μs

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