WM8955BL Wolfson Microelectronics, WM8955BL Datasheet - Page 6

• Manufacturer Part Number: WM8955BL
• Description: Stereo DAC
• Manufacturer: Wolfson Microelectronics

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WM8955BL
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, AVDD = HPVDD = 3.3V, T
PARAMETER
DAC to Line-Out (10kΩ / 50pF load)
Signal to Noise Ratio
(A-weighted)
Total Harmonic Distortion
Channel Separation
Analogue Mixer Inputs (LINEINL/R to L/ROUT1 with 10kΩ / 50pF load)
Full-scale Input Signal Level
Signal to Noise Ratio
Line-in to Line-Out
(A-weighted)
Total Harmonic Distortion
Input Resistance
(signal enters one mixer only)
Input Resistance
(signal enters two mixers)
MONOIN+/- input resistance
Mute Attenuation
Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT)
0dB Full scale output voltage
Mute attenuation
Headphone Output (LOUT1/2, ROUT1/2 with 16 or 32Ω load)
Output Power per channel
Total Harmonic Distortion
Signal to Noise Ratio
(A-weighted)
SYMBOL
R
R
THD
THD
SNR
SNR
V
SNR
THD
MONOIN
LINEIN
P
INFS
O
A
= +25
(L/ROUT1 and L/ROUT2)
(L/ROUT1 and L/ROUT2)
HPVDD=3.3V, R
HPVDD=3.3V, R
HPVDD=1.8V, R
HPVDD=1.8V, R
1kHz, full scale signal
TEST CONDITIONS
o
PGA gain = +6dB
PGA gain = +6dB
PGA gain = +6dB
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
PGA gain = 0dB
PGA gain = 0dB
PGA gain = 0dB
(L/ROUT2 only)
(L/ROUT2 only)
(L/ROUT2 only)
HPVDD = 3.3V
HPVDD = 1.8V
AVDD = other
AVDD = other
AVDD = 3.3V
AVDD = 1.8V
AVDD = 3.3V
AVDD = 1.8V
AVDD = 3.3V
AVDD = 3.3V
AVDD = 1.8V
AVDD = 3.3V
AVDD = 1.8V
AVDD = 3.3V
1kHz signal
P
P
P
P
O
O
O
O
=20mW
=20mW
Output power is very closely correlated with THD; see below.
=5mW
=5mW
L
L
L
L
=32Ω,
=16Ω,
=32Ω
=16Ω
0.95
MIN
90
89
18
18
18
92
89
6
AVDD/3.3
AVDD/3.3
10.25
0.018
0.025
0.013
0.011
20.5
10.5
5.25
TYP
100
-86
-82
1.0
-94
-90
-75
-72
-78
-79
1
98
95
98
95
20
20
91
94
96
95
PD Rev 4.1 February 2007
MAX
1.05
0.03
-75
-60
-70
Production Data
V rms
Vrms
UNIT
kΩ
kΩ
dB
dB
dB
dB
dB
dB
dB
dB
dB
%
6