WM8912 Просмотр технического описания (PDF) - Cirrus Logic

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производитель

WM8912

Ultra Low Power DAC with Headphone Driver for Portable Audio Applications

Cirrus Logic 

Production Data

CHARGE PUMP

PARAMETER

TEST CONDITIONS

Start-up Time

CPCA

Normal mode

Low power mode

CPCB

Normal mode

Low power mode

External component requirements

To achieve specified headphone output power and performance

Flyback Capacitor

at 2V

(between CPCA and CPCB)

CPVOUTN Capacitor

at 2V

CPVOUTP Capacitor

at 2V

WM8912

MIN

TYP

260

CPVDD

CPVDD/2

-CPVDD

-CPVDD/2

MAX

UNIT

s

V

V

V

V

1

2.2

F

2

2.2

F

2

2.2

F

FLL

PARAMETER

Input Frequency

Lock time

Free-running mode start-up time

Free-running mode frequency accuracy

SYMBOL

FREF

TEST CONDITIONS

FLL_CLK_REF_DIV = 00

FLL_CLK_REF_DIV = 01

VMID enabled

Reference supplied

initially

No reference provided

MIN

0.032

0.064

TYP

2

100

+/-10

+/-30

MAX

13.5

27

UNIT

MHz

MHz

ms

s

%

%

OTHER PARAMETERS

VMID Reference

PARAMETER

TEST CONDITIONS

MIN

Midrail Reference Voltage (VMID pin)

-3%

Charge up time (from fully discharged

to +5% or -10% of VMID)

External capacitor

4.7F

TYP

AVDD/2

890

MAX

+3%

UNIT

V

s

Digital Inputs / Outputs

PARAMETER

Input HIGH Level

Input LOW Level

Output HIGH Level

Output LOW Level

SYMBOL

VIH

VIL

VOH

VOL

TEST CONDITIONS

IOH = +1mA

IOL = -1mA

MIN

0.7DBVDD

0.9DBVDD

TYP

MAX

0.3DBVDD

0.1DBVDD

UNIT

V

V

V

V

w

PD, Rev 4.1, February 2013

11

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