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WM8721 Datasheet(PDF) 6 Page - Wolfson Microelectronics plc

No. de pieza WM8721
Descripción Electrónicos  Internet Audio DAC with Integrated Headphone Driver
PDF  37 Pages
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Fabricante Electrónico  WOLFSON [Wolfson Microelectronics plc]
Página de inicio  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8721 Datasheet(HTML) 6 Page - Wolfson Microelectronics plc

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WM8721 / WM8721L
Production Data
w
PD Rev 4.0 November 2004
6
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25
oC, Slave Mode, fs = 48kHz, MCLK =
256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
0.3 x DBVDD
V
Input HIGH level
VIH
0.7 x DBVDD
V
Output LOW
VOL
IOL = 1mA
0.1 x DBVDD
V
Output HIGH
VOH
IOH= -1mA
0.9 x DBVDD
V
Power On Reset Threshold (DCVDD)
DCVDD Threshold On -> Off
Vth
0.9
V
Hysteresis
VIH
0.3
V
DCVDD Threshold Off -> On
VOL
0.6
V
Analogue Reference Levels
Reference voltage (VMID)
VVMID
AVDD/2
V
Potential divider resistance
RVMID
50k
Ω
Line Output for DAC Playback Only (Load = 10k
Ω
Ω
Ω
Ω. 50pF)
0dBfs Full scale output voltage
At LINE outputs
1.0 x
AVDD/3.3
Vrms
A-weighted,
@ fs = 48kHz
95
100
dB
A-weighted
@ fs = 96kHz
100
dB
Signal to Noise Ratio
(Note 1,2)
SNR
A-weighted,
@ fs = 48kHz,
AVDD = 2.7V
98
dB
Dynamic Range (Note 2)
DR
A-weighted, -60dB
full scale input
85
100
dB
1kHz, 0dBfs
-86
-80
dB
Total Harmonic Distortion
THD
1kHz, -3dBfs
-90
dB
1kHz 100mVpp
50
dB
Power Supply Rejection Ratio
PSRR
20Hz to 20kHz
100mVpp
45
dB
DAC channel separation
1kHz, 0dB
100
dB
Stereo Headphone Output
0dB Full scale output voltage
1.0 x
AVDD/3.3
Vrms
RL = 32
Ω
30
Max Output Power
PO
RL = 16
Ω
55
mW
Signal to Noise Ratio
(Note 1,2)
SNR
A-weighted
90
98
dB
1kHz, RL = 32
Ω @ PO
= 10mW rms (-5dB)
0.056
-65
0.1
-60
Total Harmonic Distortion
THD
1kHz, RL = 32
Ω @ PO
= 20mW rms (-2dB)
0.56
-45
1.0
-40
%
dB
1kHz 100mVpp
50
dB
Power Supply Rejection Ratio
PSRR
20Hz to 20kHz
100mVpp
45
dB
Programmable Gain
1kHz
-73
6
6
dB
Programmable Gain Step Size
1kHz
1
dB
Mute attenuation
1kHz, 0dB
80
dB



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