WM8976 Wolfson Microelectronics Ltd., WM8976 Datasheet - Page 8

• Manufacturer Part Number: WM8976
• Description: The WM8976 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
• Manufacturer: Wolfson Microelectronics Ltd.

WM8976
w
Test Conditions
DCVDD=1.8V, AVDD=DBVDD=SPKVDD= 3.3V, T
stated.
PARAMETER
Digital to Analogue Converter (DAC) to Line-Out (LOUT1, ROUT1 with 10k
Full-scale output
Signal to Noise Ratio (Note 6)
Total Harmonic Distortion
(Note 7)
Channel Separation (Note 9)
Output Mixers (LMX1, RMX1)
PGA gain range into mixer
PGA gain step into mixer
Analogue Outputs (LOUT1, ROUT1, LOUT2, ROUT2)
Programmable Gain range
Programmable Gain step size
Mute attenuation
Headphone Output (LOUT1, ROUT1 with 32
0dB full scale output voltage
Signal to Noise Ratio
Total Harmonic Distortion
Speaker Output (LOUT2, ROUT2 with 8
Full scale output voltage, 0dB
gain. (Note 9)
Output Power
Total Harmonic Distortion
Signal to Noise Ratio
Power Supply Rejection Ratio
(50Hz-22kHz)
OUT3/OUT4 outputs (with 10k
Full-scale output voltage, 0dB
gain (Note 9)
Signal to Noise Ratio (Note 6)
Total Harmonic Distortion
(Note 7)
Channel Separation (Note 8)
/ 50pF load)
SYMBOL
PSRR
SNR
SNR
SNR
SNR
THD
THD
THD
THD
P
O
bridge tied load, INVROUT2=1)
load)
A
P
P
P
P
PGA gains set to 0dB,
PGA gains set to 0dB,
R
1kHz, full scale signal
R
SPKVDD=5V (boost)
TEST CONDITIONS
O
O
O
O
= +25
L
L
OUT34BOOST=0
OUT34BOOST=1
OUT3BOOST=0/
OUT4BOOST=0
OUT3BOOST=1
OUT4BOOST=1
= 32
=200mW, R
=320mW, R
=500mW, R
=860mW, R
SPKVDD=3.3V,
full-scale signal
full-scale signal
= 16 , Po=20mW
SPKVDD=3.3V
SPKVDD=3.3V
SPKBOOST=0
SPKBOOST=1
SPKVDD=5V,
SPKVDD=5V
SPKVDD=5V
R
R
AVDD=3.3V
AVDD=3.3V
1kHz signal
1kHz signal
A-weighted
A-weighted
A-weighted
R
R
Monotonic
L
L
R
R
L
o
L
= 8
= 8
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise
= 10 k
L
L
= 10k
Output power is very closely correlated with THD; see below
, Po=20mW
= 8
= 8
BTL
BTL
L
L
L
L
= 8 ,
= 8 ,
= 8 ,
= 8 ,
MIN
-15
-57
/ 50pF load)
(SPKVDD/3.3)*1.5
(SPKVDD/3.3)*1.5
SPKVDD/3.3
SPKVDD/3.3
(AVDD/3.3)
AVDD/3.3
AVDD/3.3
0.003
0.008
0.04
0.02
1.5x
TYP
110
102
- 82
100
-84
-92
-68
1.0
-40
-74
1.0
-40
-84
98
85
90
90
80
69
98
0
3
0
1
MAX
PP Rev 3.0 April 2006
+6
+6
Pre-Production
Vrms
Vrms
Vrms
Vrms
Vrms
UNIT
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
%
%
%
%
%
%
8