wm8982gefl-v Wolfson Microelectronics plc, wm8982gefl-v Datasheet - Page 7

• Manufacturer Part Number: wm8982gefl-v
• Description: Mono Codec With Speaker Driver And Video Buffer
• Manufacturer: Wolfson Microelectronics plc

Pre-Production
ELECTRICAL CHARACTERISTICS
w
Test Conditions
DCVDD=1.8V, AVDD=DBVDD=SPKVDD=VBVDD = 3.3V, T
otherwise stated.
PARAMETER
Microphone Preamp Inputs (MICN, MICP, LINEIN/JDET)
Full-scale Input Signal Level –
note this changes with AVDD
Full-scale Input Signal Level –
Pseudo-differential input
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 AUX1/2 or
LINEIN input to boost/mixer
Minimum Gain from AUX1/2 or
LINEIN input to boost/mixer
Gain step size to boost/mixer
Auxiliary Analogue Inputs (AUX1, AUX2)
Full-scale Input Signal Level
(0dB) – note this changes with
AVDD
Input Resistance
(Note 2)
Input Capacitance
Automatic Level Control (ALC)
Target Record Level
Programmable gain
Gain Hold Time (Note 2,4)
Gain Ramp-Up (Decay) Time
(Note 3,4)
Gain Ramp-Down (Attack) Time
(Note 3,4)
At 35.25dB
R
R
R
SYMBOL
AUXIN1MAX
AUXIN1TYP
AUXIN1MIN
C
C
R
R
R
R
V
V
V
t
gain
t
HOLD
t
MICIN
MICIN
MICIN
MICIP
MICIN
MICIN
DCY
ATK
INFS
INFS
INFS
Guaranteed monotonic
Guaranteed monotonic
ALCMODE=1 (limiter),
ALCMODE=0 (ALC),
ALCMODE=0 (ALC),
MCLK = 12.288MHz
Gain set to 35.25dB
TEST CONDITIONS
INPPGAVOL = 0dB
INPPGAVOL = 0dB
PGABOOST = 0dB
PGABOOST = 0dB
MICP2INPPGA = 1
MCLK=12.288MHz
MCLK=12.288MHz
MCLK=12.288MHz
Input boost and mixer
Input boost and mixer
Input boost and mixer
Gain set to -12dB
enabled, at max gain
enabled, at 0dB gain
enabled, at min gain
Gain set to 0dB
Boost disabled
Boost enabled
0 to 20kHz
(Note 3)
(Note 3)
(Note 3)
(Note 3)
A
= +25
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless
-22.5
MIN
-12
0, 2.67, 5.33, 10.67, … , 43691
(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
3.3, 6.6, 13.1, … , 3360
AVDD1*0.7/
AVDD/3.3
35.25
0.75
39.1
TYP
150
1.0
3.3
1.6
-12
120
-12
4.3
8.6
47
75
94
10
20
+6
10
0
0
3
0
PP, Rev 3.2, September 2008
35.25
MAX
-1.5
WM8982
Vrms
Vrms
Vrms
UNIT
dBV
dBV
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
ms
ms
ms
uV
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
pF
dB
7