WM8739 查看數據表（PDF） - Wolfson Microelectronics plc

零件编号

产品描述 (功能)

生产厂家

WM8739

Stereo Audio ADC

Wolfson Microelectronics plc 

WM8739 / WM8739L

Advanced Information

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

a zero signal applied. (No ‘Auto-zero’ or Automute function is employed in achieving these results).

2. Dynamic range (dB) - DNR 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 r.m.s. 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.

POWER CONSUMPTION

MODE

DESCRIPTION

TYP. SUPPLY CURRENTS

(MILLIAMPS)

IAVDD

IDBVDD IDCVDD

WM8739 (AVDD = 3.3V, DBVDD = 3.3V, DCVDD = 1.5V)

ADC Running

0

0

0

0

9.79

1.58

2.40

Standby

0

0

1

1 0.014 1.56 0.074

Power Down

1

0

X

X 0.001 1.57 0.074

Power Down,

Oscillator disabled

1

1

X

X 0.001 0.003 0.056

WM8739L (AVDD = 1.8V, DBVDD = 1.8V, DCVDD = 1.42V)

ADC Running

0

0

0

0

3.93 0.875 2.35

Standby

0

0

1

1 0.007 0.755 0.018

Power Down

1

0

X

X 0.001 0.755 0.018

Power Down,

Oscillator disabled

1

1

X

X 0.001 <1µA <1µA

Table 1 Powerdown Mode Current Consumption Examples

POWER

(mW)

41.12

5.31

5.30

0.097

11.99

1.397

1.386

0.002

Notes

1. TA = +25oC. Slave Mode, fs = 48kHz, XTI/MCLK = 256fs (12.288MHz).

2. All figures are quiescent, with no signal.

AI Rev 2.2 September 2001

6

Share Link: