Product Preview
WM8955L
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, AVDD = HPVDD = 3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
dB
DAC to Line-Out (LOUT1/2, ROUT1/2, MONOOUT with 10kΩ / 50pF load)
Signal to Noise Ratio
(A-weighted)
SNR
THD
AVDD = 3.3V
AVDD = 1.8V
AVDD = 3.3V
AVDD = 1.8V
1kHz signal
98
95
Total Harmonic Distortion
-95
-90
90
dB
Channel Separation
dB
Analogue Mixer Inputs (LINEINL, LINEINR, MONOIN)
Full-scale Input Signal Level
VINFS
AVDD = 3.3V
AVDD = 1.8V
AVDD = 3.3V
AVDD = 1.8V
1.0
0.516
95
V rms
dB
Signal to Noise Ratio
Line-in to Line-Out
(A-weighted)
SNR
90
Total Harmonic Distortion
THD
AVDD = 3.3V
AVDD = 1.8V
-92
-92
20
10
10
5
dB
dB
kΩ
Input Resistance
RLINEIN
PGA gain = 0dB
PGA gain = +6dB
PGA gain = 0dB
PGA gain = +6dB
anygain
(signal enters one mixer only)
Input Resistance
(signal enters two mixers)
MONOIN- input resistance
Programmable Gain
RMONOIN-
20
k Ω
dB
dB
dB
-15
+6
+6
Programmable Gain Step Size
Mute Attenuation
Monotonic
3
TBD
Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT)
0dB Full scale output voltage
AVDD/3.3
Vrms
dB
Programmable Gain
Programmable Gain Steps
Mute attenuation
1kHz signal
-67
80
Monotonic
80
85
90
steps
dB
1kHz, full scale signal
Channel Separation
dB
Headphone Output (LOUT1/2, ROUT1/2 with 16 or 32 Ohm load)
Output Power per channel
Total Harmonic Distortion
PO
Output power is verycloselycorrelated with THD; see below.
THD
HPVDD=1.8V, RL=32Ω
0.013
-78
%
PO=5mW
HPVDD=1.8V, RL=16Ω
PO=5mW
dB
0.013
-78
HPVDD=3.3V, RL=32Ω,
0.01
-80
PO=20mW
HPVDD=3.3V, RL=16Ω,
0.01
-80
PO=20mW
Signal to Noise Ratio
(A-weighted)
SNR
HPVDD = 3.3V
HPVDD = 1.8V
90
dB
dB
90
Product Preview Rev 0.4 May2003
w
5
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
