wm8974gefl-v Wolfson Microelectronics plc, wm8974gefl-v Datasheet - Page 7

• Manufacturer Part Number: wm8974gefl-v
• Description: Mono Codec With Speaker Driver
• Manufacturer: Wolfson Microelectronics plc

Production Data
w
Test Conditions
DCVDD = 1.8V, AVDD = DBVDD = 3.3V, SPKVDD = 3.3V, T
otherwise stated.
PARAMETER
Digital to Analogue Converter (DAC) to MONO output (all data measured with 10kΩ / 50pF load)
Signal to Noise Ratio (Note 5)
Total Harmonic Distortion + Noise
(Note 6)
0dB Full Scale output voltage (Note 9)
Speaker Output PGA
Programmable Gain
Programmable Gain Step Size
BTL Speaker Output (SPKOUTP, SPKOUTN with 8Ω bridge tied load)
Output Power
Total Harmonic Distortion + Noise
(Note 6)
Signal to Noise Ratio
Power Supply Rejection Ratio
‘Headphone’ output (SPKOUTP, SPKOUTN with resistive load to ground)
Signal to Noise Ratio
Total Harmonic Distortion + Noise
(Note 6)
Microphone Bias
Bias Voltage (MBVSEL=0)
Bias Voltage (MBVSEL=1)
Bias Current Source
Output Noise Voltage
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
V
V
SYMBOL
THD+N
THD+N
THD+N
I
MICBIAS
SNR
SNR
SNR
MICBIAS
MICBIAS
V
V
V
P
Vn
V
OH
OL
IH
O
IL
Guaranteed monotonic
P
P
P
P
Po=20mW, R
Po=20mW, R
O
O
O
O
TEST CONDITIONS
MONOBOOST=0
MONOBOOST=1
=180mW, R
=400mW, R
=360mW, R
=800mW, R
SPKVDD=3.3V,
full-scale signal
SPKVDD=3.3V
SPKVDD=3.3V
SPKVDD=3.3V
SPKVDD=3.3V
SPKVDD=5V,
SPKVDD=5V
SPKVDD=5V
1K to 20kHz
A-weighted
R
I
I
R
R
L
OL
OH
= 10 kΩ
L
L
Output power is very closely correlated with THD; see below
=1mA
-1mA
= 8Ω
= 8Ω
A
= +25
L
L
= 16Ω,
= 32Ω,
L
L
L
L
= 8Ω,
= 8Ω,
= 8Ω,
= 8Ω,
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless
0.7×DVDD
0.9×DVDD
-57
90
90
MIN
(AVDD/3.3)
0.65*AVDD
0.9*AVDD
AVDD/3.3
0.017
0.03
0.02
0.06
0.02
1.5x
101
102
100
- 75
-84
-70
5.0
-26
-75
-65
-74
98
50
15
TYP
1
PD, Rev 4.5, September 2008
0.3×DVDD
0.1xDVDD
MAX
6
3
WM8974
nV/√Hz
V
mA
UNIT
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
%
%
%
%
%
%
RMS
V
V
V
V
V
V
7