WM8777(2005) 데이터 시트보기 (PDF) - Wolfson Microelectronics plc
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WM8777 Datasheet PDF : 103 Pages
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Pre-Production
WM8777
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDDDAC = 5V, AVDDADC=5V, DVDD = 3.3V, AGNDDAC = 0V, AGNDADC = 0, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK
= 256fs, ADC/DAC in Slave Mode unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels ( CMOS Levels)
Input LOW level
VIL
Input HIGH level
VIH
Input Leakage Current
0.3 X DVDD
V
0.7 X DVDD
V
±0.2
µA
Input Capacitance
5
pF
Output LOW
VOL
Output HIGH
VOH
Analogue Reference Levels
IOL=1mA
IOH-1mA
0.9 x DVDD
0.1 x DVDD
V
V
Reference voltage
VVMID (DAC)
VREFP/2
V
VVMID (ADC)
AVDDADC/2
V
Potential divider resistance
RVMID (DAC) VREFP to VMID and
50k
Ω
VMID to VREFN
RVMID (ADC) AVDDADC to VMID
50k
Ω
and VMID to
AGNDADC
DAC Performance (Load = 10k Ω, 50pF) to pins L/RSUMOP, CNTSOP, LFESOP, L/RSUROP, L/RAUXSOP
0dBFs Full scale output voltage
1.0 x
Vrms
VREFP/5
SNR (Note 1,2)
A-weighted,
100
108
dB
@ fs = 48kHz
SNR (Note 1,2)
A-weighted
108
dB
@ fs = 96kHz
Dynamic Range (Note 2)
DNR
A-weighted, -60dB
100
108
dB
full scale input
Total Harmonic Distortion (THD)
1kHz, 0dBFs
-96
-90
dB
DAC channel separation
110
dB
DAC Mute attenuation
1kHz Input, 0dB gain
88
dB
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
50
dB
20Hz to 20kHz
45
dB
100mVpp
DAC Digital Volume
DAC Digital volume control
range
-127.5
0
dB
DAC Digital volume step size
0.5
dB
ADC Performance
Input Signal Level (0dB)
1.0 x
Vrms
AVDDADC/5
SNR (Note 1,2)
A-weighted, 0dB gain
96
102
dB
@ fs = 48kHz
SNR (Note 1,2)
A-weighted, 0dB gain
100
dB
@ fs = 96kHz
Dynamic Range (note 2)
A-weighted, -60dB
96
102
dB
full scale input
Total Harmonic Distortion (THD)
1kHz, 0dBFs
-89
dB
1kHz, -1dBFs
-94
-87
dB
ADC Channel Separation
1kHz Input
85
dB
Programmable Gain Step Size
0.5
dB
Programmable Gain Range
(Analogue)
1kHz Input
-21
+24
dB
Programmable Gain Range
(Digital)
1kHz Input
-103
-21.5
dB
Mute Attenuation
1kHz Input, 0dB gain
82
dB
w
PP Rev 3.0 January 2005
7
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