WM8985_07 WOLFSON [Wolfson Microelectronics plc], WM8985_07 Datasheet - Page 9

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

Pre-Production
w
Test Conditions
DCVDD=1.8V, AVDD1=AVDD2=DBVDD=3.3V, T
PARAMETER
Auxiliary Analogue Inputs (AUXL, AUXR)
Full-scale Input Signal Level
Input Resistance
Input Capacitance
Gain range from AUXL and AUXR
input to left and right input PGA
mixers
AUXLBOOSTVOL and
AUXRBOOSTVOL step size
L2, R2 Line Input Programmable Gain
Gain range from L2/R2 input to left
and right input PGA mixers
L2/R2_2BOOSTVOL step size
L2/R2_2BOOSTVOL mute
attenuation
OUT4 to left or right input boost record path
Gain range into left and right input
PGA mixers
OUT4_2ADCVOL gain step size
OUT4_2ADCVOL mute attenuation
Analogue to Digital Converter (ADC) - Input from LIN/P and RIN/P in differential configuration to input PGA
INPPGAVOLL, INPPGAVOLR, PGABOOSTL, PGABOOSTR, ADCLVOL and ADCRVOL = 0dB
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion + Noise
Channel Separation
Analogue to Digital Converter (ADC) - Input from L2, R2 into left and right PGA mixer. INPPGAVOLL, INPPGAVOLR,
6
3
4
2
5
SYMBOL
THD+N
SNR
THD
A
= +25
1kHz full scale input signal
Left Input boost and mixer
Left Input boost and mixer
Left Input boost and mixer
AUXL2BOOSTVOL and
Right Input boost, mixer
Right Input boost, mixer
Right Input boost, mixer
enabled, at -12dB gain
enabled, at -12dB gain
AVDD1=AVDD2=3.3V
AVDD1=AVDD2=2.5V
AVDD1=AVDD2=3.3V
AVDD1=AVDD2=2.5V
AVDD1=AVDD2=3.3V
AVDD1=AVDD2=2.5V
AVDD1=AVDD2=3.3V
AVDD1=AVDD2=2.5V
enabled, at +6dB gain
L2_2BOOSTVOL and
enabled, at 0dB gain
enabled, at 0dB gain
o
TEST CONDITIONS
AUXR2BOOSTVOL
All analogue Inputs
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
R2_2BOOSTVOL
OUT4_2ADCVOL
Gain adjusted by
enabled, at +6dB
Gain adjusted by
Gain adjusted by
22Hz to 20kHz
22Hz to 20kHz
-7dBV Input
-7dBV Input
-7dBV Input
-7dBV Input
A-weighted
A-weighted
MIN
-12
-12
-6
AVDD/3.3
92.5
91.5
TYP
100
100
100
-75
-75
-72
-72
90
90
11
22
60
11
22
60
10
3
3
3
PP, Rev 3.5, January 2007
MAX
+12
-70
-68
+6
+6
WM8985
UNIT
V
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
rms
9