WM8751L Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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производитель

WM8751L

Stereo DAC For Portable Audio Applications

Wolfson Microelectronics plc 

Production Data

WM8751L

Test Conditions

DCVDD = 1.5V, AVDD = HPVDD = 3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.

PARAMETER

Digital Input / Output

Input HIGH Level

Input LOW Level

Output HIGH Level

Output LOW Level

SYMBOL

VIH

VIL

VOH

VOL

TEST CONDITIONS

MIN

0.7×DBVDD

IOH = 1mA

IOL = -1mA

0.9×DBVDD

TYP

MAX

UNIT

V

0.3×DBVDD

V

V

0.1×DBVDD

V

TERMINOLOGY

1. Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full scale output and the output

with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).

2. Dynamic range (dB) - DR is a measure of the difference between the highest and lowest portions of a signal.

Normally a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB

to it. (e.g. THD+N @ -60dB= -32dB, DR= 92dB).

3. THD+N (dB) - THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.

4. Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from

the other. Normally measured by sending a full scale signal down one channel and measuring the other.

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PD Rev 4.2 August 2006

7

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