WM8985GEFL Wolfson Microelectronics, WM8985GEFL Datasheet - Page 12

• Manufacturer Part Number: WM8985GEFL
• Description: Audio CODECs Multimedia CODEC with Class D HP
• Manufacturer: Wolfson Microelectronics

Specifications of WM8985GEFL

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
Maximum PGA gain into mixer
Minimum PGA gain into mixer
BYPLMIXVOL and BYPRMIXVOL
gain step into mixer
Mute attenuation
Analogue outputs (LOUT1, ROUT1, LOUT2, ROUT2)
Maximum Programmable Gain
Minimum Programmable Gain
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
Guaranteed monotonic
Guaranteed monotonic
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
BYPLMIXVOL and
L/ROUT1VOL 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
Gain adjusted by
BYPR2RMIX = 0
Gain adjusted by
Gain adjusted by
BYPL2LMIX = 0
= 20mW, RL=16Ω
= 20mW, RL=16Ω
22Hz to 20kHz
BYPRMIXVOL
BYPRMIXVOL
L/ROUT2VOL
L/ROUT2VOL
1kHz signal
1kHz signal
A-weighted
A-weighted
pp
ripple @217Hz
PW
= 20ns,
MIN
90
90
AVDD1/3.3
AVDD1/3.3
95.5
TYP
100
100
100
-80
-77
-79
1.5
1.5
1.4
0.5
-15
-57
97
97
72
70
+6
+6
85
3
1
filter
= 33uH C
PD, Rev 4.6, July 2009
MAX
-75
-70
-75
Production Data
filter
= 220nf
UNIT
MHz
V
V
mA
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
ns
ns
%
rms
rms
12