WM8953ECSSLASHRV datasheet(11/100 Pages) WOLFSON

11 / 100 page

Production Data

WM8953

PD, January 2009, Rev 4.0

Test Conditions

DCVDD = 1.8V, DBVDD = 3.3V, AVDD = 3.3V, TA = +25

oC, 1kHz signal, fs = 48kHz,

PGA gain = 0dB, 24-bit audio data unless otherwise stated.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Analogue Reference Levels

VMID Midrail Reference Voltage

-3%

AVDD/2

+3%

Microphone Bias

3mA load current

MBSEL=0

-5%

0.9

×AVDD

+5%

Bias Voltage

3mA load current

MBSEL=1

-5%

0.65

×AVDD

+5%

Bias Current Source

Output Noise Density

1kHz to 20kHz

100

nV/

√Hz

AVDD PSRR (217Hz)

100mV pk-pk @217Hz

on AVDD

Digital Input / Output

Input HIGH Level

0.7

×DBVDD

Input LOW Level

0.3

×DBVDD

Note that digital input pins should not be left unconnected / floating.

Internal pull-up/pull-down resistors may be enabled on GPIO3, GPIO4 and GPIO5 if required.

Output HIGH Level

IOL=1mA

0.9

×DBVDD

Output LOW Level

IOH=-1mA

0.1

×DBVDD

Input capacitance

Input leakage

-0.9

0.9

PLL

PRESCALE = 0b

7.7

MHz

Input Frequency

PRESCALE = 1b

14.4

MHz

Lock time

200

GPIO

SYSCLK=MCLK;

OPCLKDIV=0000

SYSCLK=MCLK;

OPCLKDIV=1000

SYSCLK=PLL output;

OPCLKDIV=0000

Clock output duty cycle

(Integer OPCLKDIV)

SYSCLK=PLL output;

OPCLKDIV=1000

SYSCLK=MCLK;

OPCLKDIV=0100

Clock output duty cycle

(Non-integer OPCLKDIV)

SYSCLK=PLL output;

OPCLKDIV=0100

Input de-bounced

221 / fSYSCLK

222 / fSYSCLK

Input de-bounced

TOCLKSEL=1

219 / fSYSCLK

220 / fSYSCLK

Interrupt response time for accessory /

button detect

Input not de-bounced

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