WM8727

Production Data

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PD Rev 4.1 April 2004

5

ELECTRICAL CHARACTERISTICS

Test Conditions

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital Logic Levels (TTL Levels)

Input LOW level

0.8

V

Input HIGH level

2

V

Output LOW

0.10 x VDD

V

Output HIGH

0.9 x VDD

V

DAC Output (Load = 10k

Ω

Ω

Ω

Ω 50pF)

0dBFs Full scale output voltage

At DAC outputs

1.2 x

VDD/5

SNR (Note 1,2)

A-weighted,

@ fs = 48kHz

98

dB

SNR (Note 1,2)

A-weighted

@ fs = 96kHz

95

dB

SNR (Note 1,2)

A-weighted

@ fs = 192kHz

92

dB

SNR (Note 1,2)

A-weighted,

@ fs = 48kHz

VDD = 3.3V

95

dB

SNR (Note 1,2)

A-weighted

@ fs = 96kHz

VDD = 3.3V

95

dB

SNR (Note 1,2)

Non ‘A’ weighted @ fs

= 48kHz

92

dB

THD

1kHz, 0dBFs

-84

dB

Dynamic range (Note 2)

1kHz, THD+N @

-60dBFs

98

dB

Analogue Output Levels

Load = 10k

Ω, 0dBFS

1.2

Output level

Load = 10k

Ω, 0dBFS,

(VDD = 3.3V)

0.79

Gain mismatch

channel-to-channel

±1

%FSR

To midrail or a.c.

coupled

1

k

Ω

Minimum resistance load

To midrail or a.c.

coupled

(VDD = 3.3V)

1

k

Ω

Maximum capacitance load

5V or 3.3V

100

pF

Output d.c. level

VDD/2

V

Power On Reset (POR)

POR threshold

1.8

V

Notes:

1.

Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’ weighted

over a 20Hz to 20kHz bandwidth.

2.

All performance measurements done with 20kHz low pass filter, and where noted an A-weight filter. Failure to use such a

filter will result in higher THD+N and lower SNR and Dynamic Range readings than are found in the Electrical

Characteristics. The low pass filter removes out of band noise; although it is not audible it may affect dynamic specification

values.

3.

Power down occurs 1.5

µs after MCLK stops.