WM9705SEFT/V 데이터 시트보기 (PDF) - Wolfson Microelectronics plc
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WM9705SEFT/V
Wolfson Microelectronics plc
WM9705SEFT/V Datasheet PDF : 55 Pages
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WM9705
Production Data
Electrical characteristics
Test Characteristics:
AVDD = 3.3V, DVDD = 3.3V, 48kHz audio sampling, TA = 25oC, unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (DVDD = 3.3V)
Input LOW level
Input HIGH level
Output LOW
VIL
DGND - 0.3
VIH
2.2
VOL
I Load = 2mA
0.8
V
DVDD + 0.3
V
0.10 x DVDD
V
Output HIGH
VOH
I Load = -2mA 0.90 x DVDD
V
Analogue Audio I/O Levels (Input Signals on any audio inputs, Outputs on LINEOUT L, R and MONO and HPOUT L,R)
Input level
Output level to LINEOUT L,R
Minimum input
AGND
AVDD
V
impedance = 10k
-100mV
+100mV
Into 10kΩ load
AGND Near rail to AVDD
V
+300mV
rail
-300mV
Output level to HPOUT L,
HPOUTR and MONOOUT
Into 16Ω load
AGND Near rail to AVDD
V
+300mV
rail
-300mV
Reference Levels
Reference input/output
CAP2
0.47 AVDD 0.50 AVDD 0.53 AVDD
V
CAP2 impedance
75
kΩ
Mixer reference
VREF
Buffered
V
CAP2
MIC reference
VREFOUT
Buffered
V
CAP2
MIDBUFF current source
(pins VREF and VREFOUT)
AVDD = 3.3V
5
10
mA
MIDBUFF current sink
(pins VREF and VREFOUT)
AVDD = 3.3V
-5
-10
mA
AUDIO DAC to Line-out (10kΩ load)
SNR A-weighted (Note 2)
85
91
dB
Full scale output voltage
VREF = 1.65V
0.7
Vrms
Total Harmonic Distortion +
Noise
THD+N
-3dBfs input
-84
-74
dB
0.006
0.02
%
PSRR
20 to 20kHz, without
-40
dB
supply decoupling
AUDIO ADC
ADC input for full scale output
VREF = 1.65V
0.7
Vrms
Signal to Noise Ratio
A-weighted (Note 2)
SNR
80
86
dBfs
Total Harmonic Distortion+Noise THD+N
-6dBfs input
-79
-72
dB
Power Supply Rejection Ratio
PSRR
20 to 20kHz, without
supply decoupling
-40
dB
Digital Filter Characteristics
Frequency response
20
19,200
Hz
Transition band
19,200
28,800
Hz
Stop band
28,800
Hz
Stop band attenuation
ADC
-74
dB
DAC
-40
w
PD Rev 4.4 August 2006
8
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