WM1811A datasheet(27/328 Pages) WOLFSON

27 / 328 page

Production Data

WM1811A

PD, November 2013, Rev 4.1

MISCELLANEOUS CHARACTERISTICS

Test Conditions

AVDD1=3.0V (powered from LDO1), DCVDD=1.05V (powered from LDO2),

AVDD2=DBVDD1=DBVDD2=DBVDD3=CPVDD=1.8V, LDO1VDD=SPKVDD1=SPKVDD2=5V,

DGND=AGND=CPGND=SPKGND1=SPKGND2=HP2GND=0V,

TA = +25

oC, 1kHz sinusoidal 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

VMID_SEL = 01,

4.7

F capacitor on VMIDC

-3%

AVDD1/2

+3%

VMID Start-Up time

VMID_SEL = 01,

VMID_RAMP = 11,

4.7

F capacitor on VMIDC

External Accessory Detection

Load impedance detection range

(MICDET)

2.2kΩ (2%) MICBIAS2 resistor.

Note these characteristics assume no

other component is connected to

MICDET. See “Applications Information”

for recommended external components

when a typical microphone is present.

for MICD_LVL[0] = 1

Ω

for MICD_LVL[1] = 1

13.33

15.27

for MICD_LVL[2] = 1

27.16

30.96

for MICD_LVL[3] = 1

42.48

49.47

for MICD_LVL[4] = 1

for MICD_LVL[5] = 1

114

155.24

for MICD_LVL[6] = 1

191

329.87

for MICD_LVL[7] = 1

475

30000

Jack Detection input threshold voltage

(JACKDET)

Jack insertion

0.5 x

AVDD2

Jack removal

0.85 x

AVDD2

Frequency Locked Loops (FLLs)

H29

Lock time

FREF=32kHz,

FOUT=12.288MHz

2.5

FREF=12MHz,

FOUT=12.288MHz

300

s

H30

Free-running mode start-up time

100

s

H31

Free-running mode frequency accuracy

Reference supplied initially

+/-10

No reference provided

+/-30

WM1811A Datasheet(PDF) 27 Page - Wolfson Microelectronics plc

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