XWM8721EDS Просмотр технического описания (PDF) - Wolfson Microelectronics plc
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XWM8721EDS Datasheet PDF : 37 Pages
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WM8721 / WM8721L
Production Data
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25oC, 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. 50pF)
0dBfs Full scale output voltage
At LINE outputs
1.0 x
Vrms
AVDD/3.3
Signal to Noise Ratio
SNR
A-weighted,
95
100
dB
(Note 1,2)
@ fs = 48kHz
A-weighted
100
dB
@ fs = 96kHz
A-weighted,
98
dB
@ fs = 48kHz,
AVDD = 2.7V
Dynamic Range (Note 2)
DR
A-weighted, -60dB
85
100
dB
full scale input
Total Harmonic Distortion
THD
1kHz, 0dBfs
-86
-80
dB
1kHz, -3dBfs
-90
dB
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
50
dB
20Hz to 20kHz
45
dB
100mVpp
DAC channel separation
1kHz, 0dB
100
dB
Stereo Headphone Output
0dB Full scale output voltage
1.0 x
Vrms
AVDD/3.3
Max Output Power
PO
RL = 32Ω
RL = 16Ω
30
mW
55
Signal to Noise Ratio
SNR
A-weighted
90
98
dB
(Note 1,2)
Total Harmonic Distortion
THD
1kHz, RL = 32 Ω @ PO
= 10mW rms (-5dB)
0.056
0.1
%
-65
-60
dB
1kHz, RL = 32 Ω @ PO
= 20mW rms (-2dB)
0.56
1.0
-45
-40
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
50
dB
20Hz to 20kHz
45
dB
100mVpp
Programmable Gain
1kHz
-73
6
6
dB
Programmable Gain Step Size
1kHz
1
dB
Mute attenuation
1kHz, 0dB
80
dB
w
PD Rev 4.0 November 2004
6
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