wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 21

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

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Pre-Production
Test Conditions
DCVDD = 1.8V, HBVDD = MBVDD = I2CVDD = I2S1VDD = I2S2VDD = AVDD = HPVDD = 3.0V, SPKVDD = 5V,
T
Headset Voice Call:
Tx Voice and Rx Voice Separation
1kHz full scale differential input on
RXP/RXN via RXVOICE to LOMIX
and ROMIX, output to LOUT and
ROUT; Quiescent input on LIN12
or RIN12 (Gain=+12dB),
differential output to LOP/LON or
ROP/RON; Measure crosstalk at
LOP/LON or ROP/RON output
Stereo Line Record and Playback:
DAC/Headset to ADC Separation
-5dBFS input to DACs, playback
to LOUT and ROUT1; ADC record
from line input; Measure crosstalk
on ADC output
Test Conditions
DCVDD = 1.8V, HBVDD = MBVDD = I2CVDD = I2S1VDD = I2S2VDD = AVDD = HPVDD = 3.0V, SPKVDD = 5V,
T
PARAMETER
Analogue Reference Levels
VMID Midrail Reference Voltage
VREF Buffered Reference Voltage
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Density
AVDD PSRR (217Hz)
A
A
= +25
= +25
o
o
C, 1kHz signal, fs = 44.1kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated.
PARAMETER
C, 1kHz signal, fs = 44.1kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated.
100mV pk-pk @217Hz
TEST CONDITIONS
3mA load current
3mA load current
1kHz to 20kHz
TEST CONDITIONS
MBSEL=0
MBSEL=1
on AVDD
-3%
-3%
-5%
-5%
MIN
0.65×AVDD
0.9×AVDD
MIN
AVDD/2
AVDD/2
TYP
100
45
TYP
75
90
PP, April 2009, Rev 3.0
MAX
+3%
+3%
+5%
+5%
3
MAX
WM8400
nV/√Hz
UNIT
UNIT
mA
dB
dB
dB
V
V
V
V
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