WM8768

Production Data

w

PD Rev 4.1 March 2005

6

RECOMMENDED OPERATING CONDITIONS

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital supply range

DVDD

2.7

3.6

V

Analogue reference supply

VREFP

2.7

5.5

V

Analogue supply range

AVDD

2.7

5.5

V

Ground

AGND, VREFN, DGND

0

V

Difference DGND to AGND

-0.3

0

+0.3

V

Note: Digital supply DVDD must never be more than 0.3V greater than AVDD for normal operation of the device.

ELECTRICAL CHARACTERISTICS

Test Conditions

otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital Logic Levels (CMOS Levels)

Input LOW level

0.3 x DVDD

V

Input HIGH level

0.7 x DVDD

V

Output LOW

0.1 x DVDD

V

Output HIGH

0.9 x DVDD

V

Analogue Reference Levels

Reference voltage

VREFP/2

V

Potential divider resistance

VREFP to VMID and

VMID to VREFN

100

k

Ω

DAC Performance (Load = 10k

Ω

Ω

Ω

Ω, 50pF)

0dBFs Full scale output voltage

1.0 x

VREFP/5

Vrms

SNR (Note 1,2,4)

A-weighted,

@ fs = 48kHz

95

103

dB

SNR (Note 1,2,4)

A-weighted

@ fs = 96kHz

101

dB

SNR (Note 1,2,4)

A-weighted

@ fs = 192kHz

101

dB

SNR (Note 1,2,4)

A-weighted

@ fs = 48kHz, AVDD =

3.3V

101

dB

SNR (Note 1,2,4)

A-weighted

@ fs = 96kHz, AVDD =

3.3V

96

dB

Dynamic Range (Note 2,4)

DNR

A-weighted, -60dB full

scale input

95

103

dB

Total Harmonic Distortion (THD)

(Note 4)

1kHz, 0dBFs

-90

-83

dB

Mute Attenuation

1kHz Input, 0dB gain

100

dB

DAC channel separation

100

dB

1kHz 100mVpp

50

dB

Power Supply Rejection Ratio

PSRR

20Hz to 20kHz

100mVp-p

45

dB

Supply Current

Analogue supply current

AVDD = 5V

18.4

mA

Digital Supply Current

DVDD = 3.3V

14.6

mA