Specifications

Wireless CPU
®
Q24 Series
Interfaces
Electrical characteristics
MIC2 ris Electrical characte tics
Parameters Min Typ Max Unit
MIC2- 0.225 0.35 0.475 V
MIC2+ 2.025 2.15 2.275 V
Output
current
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WM_PGM_Q24NG_PTS_001-005 November 20, 2007
0.5 1 mA
Internal biasing
DC
characteristics
R2 900 1150 1400
Ω
AC
characteristics
100 Hz<F<5
kHz
Z2 1.2 1.5 1.8
KΩ
3.12.2 Speaker uts
Two speaker outputs are available: SPK1 and SPK2.
Both speaker outputs may be represented as follows:
Equi ircuit
3.12.2.1 Common Speaker Output Characteristics
tial or single-ended, but using a differential connection
Outp
valent c
The connection may be differen
to reject common mode noise and TDMA noise is strongly recommended. Moreover,
in single-ended mode, the power is , compare to the differential mode reduced by two
Caution:
When using a single-ended connection to have a good ground plane, a good
filtering as a g shie ng in o a e audio
path.
2 are push-pull amplifiers and may be loaded down to
150Ω and up to 1 nF
The impedance of the speaker amplifier outputs in differential mode is:
R ≤ 1 .
, ensure
well as ood ldi order t void any disturbance on th
Speaker outputs SPK1 and SPK
Ω +/-10 %
When speaker output is not used, the speake
+/-30% imp is k etw SP SP SPK2P.
hese outputs are differential and the output power may be adjusted by step of 2 dB.
The output may be directly connected to a speaker.
Q24 Series
r interface is in three states and a 20K
edance ept b een K1N and K1P as well as SPK2N and
T