WM9705
Production Data
ELECTRICAL CHARACTERISTICS
Test Characteristics:
AVDD = 3.3V, DVDD = 3.3V, 48kHz audio sampling, T
A
= 25
o
C, unless otherwise stated.
PARAMETER
Digital Logic Levels (DVDD = 3.3V)
Input LOW level
Input HIGH level
Output LOW
Output HIGH
Input level
Output level to LINEOUT L,R
Output level to HPOUT L,
HPOUTR and MONOOUT
Reference Levels
Reference input/output
CAP2 impedance
Mixer reference
MIC reference
MIDBUFF current source
(pins VREF and VREFOUT)
MIDBUFF current sink
(pins VREF and VREFOUT)
AUDIO DAC to Line-out (10kΩ load)
Ω
SNR A-weighted (Note 2)
Full scale output voltage
Total Harmonic Distortion +
Noise
PSRR
AUDIO ADC
ADC input for full scale output
Signal to Noise Ratio
A-weighted (Note 2)
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Digital Filter Characteristics
Frequency response
Transition band
Stop band
Stop band attenuation
ADC
DAC
20
19,200
28,800
-74
-40
19,200
28,800
Hz
Hz
Hz
dB
SNR
THD+N
PSRR
-6dBfs input
20 to 20kHz, without
supply decoupling
VREF = 1.65V
80
0.7
86
-79
-40
-72
Vrms
dBfs
dB
dB
THD+N
VREF = 1.65V
-3dBfs input
20 to 20kHz, without
supply decoupling
85
91
0.7
-84
0.006
-40
-74
0.02
dB
Vrms
dB
%
dB
VREF
VREFOUT
AVDD = 3.3V
AVDD = 3.3V
5
-5
CAP2
0.47 AVDD
0.50 AVDD
75
Buffered
CAP2
Buffered
CAP2
10
-10
0.53 AVDD
V
kΩ
V
V
mA
mA
V
IL
V
IH
V
OL
V
OH
I Load = 2mA
I Load = -2mA
Minimum input
impedance = 10k
Into 10kΩ load
Into 16Ω load
0.90 x DVDD
AGND
-100mV
AGND
+300mV
AGND
+300mV
AVDD
+100mV
AVDD
-300mV
AVDD
-300mV
DGND - 0.3
2.2
0.8
DVDD + 0.3
0.10 x DVDD
V
V
V
V
V
V
V
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analogue Audio I/O Levels (Input Signals on any audio inputs, Outputs on LINEOUT L, R and MONO and HPOUT L,R)
Near rail to
rail
Near rail to
rail
w
PD Rev 4.0 December 2003
8
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
