wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 20

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

WM8400
w
Test Conditions
DCVDD = 1.8V, HBVDD = MBVDD = I2CVDD = I2S1VDD = I2S2VDD = AVDD = HPVDD = 3.0V, SPKVDD = 5V,
T
Multi-Path Channel Separation
Headset Voice Call:
DAC/Headset to Tx Voice
Separation
1kHz 0dBFS DAC playback 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
Headset Voice Call:
DAC/Speaker to Tx Voice
Separation
1kHz 0dBFS DAC playback to
speaker, 1W output; 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
PCM Voice Call:
Rx Voice to Tx Voice Separation
fs=8kHz for ADC and DAC,
DAC_SB_FILT=1; -5dBFS
differential mono output from
DACs to OUT3/OUT4; Quiescent
input on input PGA (Gain=+12dB)
to ADC via INMIXL or INMIXR;
Measure crosstalk at ADC output
Speakerphone PCM Voice Call:
DAC/Speaker to ADC Separation
fs=8kHz for ADC and DAC,
DAC_SB_FILT=1; 0dBFS DAC
output to speaker (1W output);
ADC record from input PGA
(Gain=+30dB); Measure crosstalk
on ADC output
Ear Speaker Voice Call:
Tx Voice and Rx Voice Separation
1kHz Full scale differential input
on RXP/RXN, output to
OUT3/OUT4; 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
A
= +25
o
C, 1kHz signal, fs = 44.1kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated.
PARAMETER
LIN1 or
LIN2 or
RIN1
RIN2
LIN4/RXN
RIN4/RXP
Full scale input
Quiescent input
-
+
+12dB
differential mode)
(Single-ended or
LIN12 or RIN12
TEST CONDITIONS
LOPMIX or
ROPMIX
OUT3MIX
OUT4MIX
+
+
0dB
0dB
0dB
0dB
OUT3
OUT4
LON or
LOP or
ROP
RON
LOAD
LOAD
MIN
TYP
100
85
90
85
70
PP, April 2009, Rev 3.0
MAX
Pre-Production
UNIT
dB
dB
dB
dB
dB
20