WM8985_07 WOLFSON [Wolfson Microelectronics plc], WM8985_07 Datasheet - Page 12

• Manufacturer Part Number: WM8985_07
• Description: Multimedia CODEC With Class D Headphone and Line Out
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8985
w
Test Conditions
DCVDD=1.8V, AVDD1=AVDD2=DBVDD=3.3V, T
PARAMETER
DAC to left and right mixer into headphone 16Ω load on LOUT2 and ROUT2, Class AB mode
LOUT2VOL, ROUT2VOL, DACLVOL and DACRVOL = 0dB
Full-scale output
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion + Noise
Channel Separation
DAC to left and right mixer into headphone 16Ω load on LOUT2 and ROUT2, Class D mode, L
LOUT2VOL, ROUT2VOL, DACLVOL and DACRVOL = 0Db
Full-scale output
Signal to Noise Ratio
Total Harmonic Distortion
Channel Separation
PWM Rise Time
PWM Fall Time
PWM Switching Frequency
Efficiency
Power Supply Rejection
Idle Current
Bypass paths to left and right output mixers. BYPL2LMIX = 1 and BYPR2RMIX = 1
PGA gain range into mixer
BYPLMIXVOL and BYPRMIXVOL
gain step into mixer
Mute attenuation
Analogue outputs (LOUT1, ROUT1, LOUT2, ROUT2)
Programmable Gain range
Programmable Gain step size
Mute attenuation
6
6
3
3
4
4
5
SYMBOL
THD+N
PSRR
SNR
THD
SNR
THD
A
= +25
No analogue output signal
R
P
100mV
O
L
AVDD1=AVDD2=3.3V
AVDD1=AVDD2=3.3V
AVDD1=AVDD2=3.3V
Po = 20mW, RL=16Ω
1kHz, full scale signal
P
P
o
TEST CONDITIONS
L/ROUT1MUTE = 1
L/ROUT2MUTE = 1
= 16Ω, t
injected on AVDD2
= 20mW
BYPLMIXVOL and
L/ROUT1VOL and
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
o
o
DCLKDIV = 1000
on either channel
Gain adjusted by
BYPR2RMIX = 0
Gain adjusted by
BYPL2LMIX = 0
= 20mW, RL=16Ω
= 20mW, RL=16Ω
22Hz to 20kHz
BYPRMIXVOL
L/ROUT2VOL
1kHz signal
1kHz signal
A-weighted
A-weighted
Monotonic
pp
ripple @217Hz
PW
= 20ns,
MIN
-15
-57
80
AVDD1/3.3
AVDD1/3.3
95.5
TYP
100
100
100
-79
-75
-79
1.5
1.5
1.4
0.5
97
90
72
70
85
0
3
0
1
filter
= 33nH C
PP, Rev 3.5, March 2007
MAX
-70
+6
+6
filter
Pre-Production
= 220nf
UNIT
MHz
V
V
mA
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
ns
ns
%
rms
rms
12