WM8985_07 WOLFSON [Wolfson Microelectronics plc], WM8985_07 Datasheet - Page 8

• Manufacturer Part Number: WM8985_07
• Description: Multimedia CODEC With Class D Headphone and Line Out
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8985
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ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD=1.8V, AVDD1=AVDD2=DBVDD=3.3V, T
PARAMETER
Microphone Input PGA Inputs (LIP, LIN, RIP, RIN, L2, R2)
INPPGAVOLL, INPPGAVOLR, PGABOOSTL and PGABOOSTR = 0dB
Full-scale Input Signal Level –
Single-ended input via LIN/RIN
Full-scale Input Signal Level –
Pseudo-differential input
Input PGA equivalent input noise
LIN, RIN input resistance
LIN, RIN input resistance
LIN, RIN input resistance
LIP, RIP input resistance
L2, R2 input resistance
L2, R2 input resistance
L2, R2 input resistance
L2, R2 input resistance
Input Capacitance
Input PGA Programmable Gain
Programmable Gain Step Size
Input PGA Mute Attenuation
Input Gain Boost
Input Gain Boost
1,2
1
SYMBOL
A
= +25
INPPGAVOLL/R = +35.25dB
INPPGAVOLR = +35.25dB
R2_2BOOSTVOL = -12dB
R2_2BOOSTVOL = +6dB
R2_2BOOSTVOL = 0dB
R2_2BOOSTVOL = 000
INPPGAVOLR = -12dB
All analogue input pins
Guaranteed monotonic
L2_2BOOSTVOL and
L2_2BOOSTVOL and
L2_2BOOSTVOL and
L2_2BOOSTVOL and
INPPGAVOLR = 0dB
INPPGAMUTEL and
INPPGAMUTER = 1
o
TEST CONDITIONS
INPPGAVOLL and
INPPGAVOLL and
INPPGAVOLL and
INPPGAVOLL and
PGABOOSTL and
PGABOOSTR = 0
PGABOOSTL and
PGABOOSTR = 1
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
L2_2INPPGA and
L2_2INPPGA and
L2_2INPPGA and
L2_2INPPGA and
R2_2INPPGA = 1
R2_2INPPGA = 0
R2_2INPPGA = 0
R2_2INPPGA = 0
Gain adjusted by
All gain settings
No input signal
INPPGAVOLL
0 to 20kHz
MIN
-12
AVDD*0.7/
AVDD/3.3
0.75
TYP
150
3.3
1.6
100
+20
46
71
90
90
11
22
60
10
0
PP, Rev 3.5, March 2007
+35.25
MAX
Pre-Production
UNIT
V
V
µV
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
pF
dB
dB
dB
dB
dB
rms
rms
8