WM8581(2005) 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8581
(Rev.:2005)

Multichannel CODEC with S/PDIF Transceiver

Wolfson Microelectronics plc 

WM8581

Production Data

Test Conditions

AVDD, PVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, PGND, DGND = 0V, TA = +25oC, 1kHz Signal, fs = 48kHz,

24-Bit Data, Slave Mode, MCLK, ADCMCLK = 256fs, 1Vrms Input Signal Level unless otherwise stated.

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

Potential divider resistance

RVMID

VREFP to VMID and

14

kΩ

VMID to VREFN

VMIDSEL = 1

VREFP to VMID and

44

kΩ

VMID to VREFN

VMIDSEL = 0

S/PDIF Transceiver Performance

Jitter on recovered clock

50

ps

S/PDIF Input Levels CMOS MODE

Input LOW level

VIL

Input HIGH level

VIH

Input capacitance

0.3 X DVDD

V

0.7 X DVDD

V

1.25

pF

Input Frequency

36

MHz

S/PDIF Input Levels Comparator MODE

Input capacitance

Input resistance

10

pF

23

kΩ

Input frequency

25

MHz

Input Amplitude

200

0.5 X DVDD

mV

PLL

Period Jitter

80

ps(rms)

XTAL

Input XTI LOW level

Input XTI HIGH level

Input XTI capacitance

Input XTI leakage

Output XTO LOW

Output XTO HIGH

Supply Current

VXIL

VXIH

CXJ

IXleak

VXOL

VXOH

15pF load capacitors

15pF load capacitors

0

853

3.32

28.92

86

1.458

557

mV

mV

4.491

pF

38.96

mA

278

mV

1.942

V

Analogue supply current

AVDD, VREFP = 5V

45

mA

Analogue supply current

AVDD, VREFP = 3.3V

30

mA

Digital supply current

Power Down

DVDD = 3.3V

25

mA

500

µA

Table 5 Electrical Characteristics

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.

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. VMID decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).

4. PSSR measured with VMID set to high impedance

w

PD Rev 4.0 April 2007

14

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