wm8976gefl-v Wolfson Microelectronics plc, wm8976gefl-v Datasheet - Page 7

• Manufacturer Part Number: wm8976gefl-v
• Description: Stereo Codec With Speaker Driver
• Manufacturer: Wolfson Microelectronics plc

Production Data
ELECTRICAL CHARACTERISTICS
w
Test Conditions
DCVDD=1.8V, AVDD=DBVDD=SPKVDD= 3.3V, T
PARAMETER
Microphone Preamp Inputs (LIP, LIN)
Full-scale Input Signal Level –
note this changes in proportion
to AVDD (Note 1)
Mic PGA equivalent input noise
Input resistance
MIC Programmable Gain Amplifier (PGA)
Maximum Programmable Gain
Minimum Programmable Gain
Programmable Gain Step Size
Mute Attenuation
Selectable Input Gain Boost (0/+20dB)
Gain Boost on PGA input
Maximum Gain from AUXL or L2
input to boost/mixer
Minimum Gain from AUXL or L2
input to boost/mixer
Gain step size to boost/mixer
Auxiliary Analogue Inputs (AUXL, AUXR)
Full-scale Input Signal Level
(0dB) – note this changes in
proportion to AVDD
Input Capacitance
Automatic Level Control (ALC)
Target Record Level
Programmable gain
Gain Hold Time (Note 3,5)
Gain Ramp-Up (Decay) Time
(Note 4,5)
Gain Ramp-Down (Attack) Time
(Note 4,5)
Mute Attenuation
Analogue to Digital Converter (ADC)
Signal to Noise Ratio (Note 6)
Total Harmonic Distortion
(Note 7)
At 35.25dB
SYMBOL
R
C
R
R
R
C
V
V
SNR
t
THD
gain
t
HOLD
t
MICIN
MICIN
MICIN
MICIP
MICIN
MICIN
DCY
ATK
INFS
INFS
A
Guaranteed monotonic
Guaranteed monotonic
ALCMODE=1 (limiter),
ALCMODE=1 (limiter),
A-weighted, 0dB gain
ALCMODE=0 (ALC),
ALCMODE=0 (ALC),
MCLK = 12.288MHz
TEST CONDITIONS
Gain set to 35.25dB
= +25
INPPGAVOL = 0dB
PGABOOST = 0dB
MCLK=12.288MHz
MCLK=12.288MHz
MCLK=12.288MHz
MCLK=12.288MHz
Gain set to -12dB
LIP2INPPGA = 1
Gain set to 0dB
Boost disabled
Boost enabled
-3dBFS input
0 to 20kHz
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
-22.5
MIN
-12
0, 2.67, 5.33, 10.67, … , 43691
85
(time doubles with each step)
(time doubles with each step)
(time doubles with each step)
(time doubles with each step)
(time doubles with each step)
0.73, 1.45, 2.91, … , 744
0.83, 1.66, 3.33, … , 852
0.18, 0.36, 0.73, … , 186
3.3, 6.6, 13.1, … , 3360
AVDD/3.3
35.25
0.75
TYP
150
120
1.0
1.6
-12
120
-12
-84
47
75
94
10
20
+6
10
95
0
0
3
0
35.25
MAX
-1.5
-74
PD Rev 4.4 July 2009
WM8976
Vrms
Vrms
UNIT
dBV
dBV
kΩ
kΩ
kΩ
kΩ
ms
ms
ms
uV
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
pF
dB
dB
dB
dB
dB
7