WM8734 Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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производитель

WM8734

Stereo Audio CODEC

Wolfson Microelectronics plc 

WM8734

Production Data

ELECTRICAL CHARACTERISTICS

Test Conditions

AVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 3.3V, DGND = 0V, TA = +25oC, Slave Mode, fs = 48kHz, MCLK = 256fs unless

otherwise stated.

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital Logic Levels (CMOS Levels)

Input LOW level

VIL

0.3 x DBVDD

V

Input HIGH level

VIH

0.7 x DBVDD

V

Output LOW

VOL

0.10 x

V

DBVDD

Output HIGH

VOH

0.9 x DBVDD

V

Power On Reset Threshold (DCVDD)

DCVDD Threshold On -> Off

Vth

0.9

V

Hysteresis

VIH

0.3

V

DCVDD Threshold Off -> On

VOL

0.6

V

Analogue Reference Levels

Reference voltage

VVMID

AVDD/2

V

Potential divider resistance

RVMID

50k

Ω

Line Input to ADC

Input Signal Level (0dB)

VINLINE

1.0

Vrms

AVDD/3.3

Signal to Noise Ratio

SNR

A-weighted, 0dB gain

85

90

dB

(Note 1,2,3)

@ fs = 48kHz

A-weighted, 0dB gain

90

@ fs = 96kHz

A-weighted, 0dB gain

88

@ fs = 48kHz,

AVDD = 2.7V

Dynamic Range (Note 3)

DNR

A-weighted, -60dB full

85

90

dB

scale input

Total Harmonic Distortion

THD

-1dB input, 0dB gain

-84

-74

dB

Power Supply Rejection Ratio

PSSR

1kHz 100mVpp

50

dB

20Hz to 20kHz

45

100mVpp

ADC channel separation

1kHz input

90

dB

Programmable Gain

1kHz input

-34.5

0

+12

dB

Rsource < 50Ω

Programmable Gain Step Size

Guaranteed Monotonic

1.5

dB

Mute attenuation

0dB, 1kHz input

80

dB

Input Resistance

RINLINE

0dB gain

20k

30k

Ω

12dB gain

10k

15k

Input Capacitance

CINLINE

10

pF

w

PD Rev 4.1 November 2006

8

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