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WM_PRJ_Q2686_PTS_001-010
June 30, 2009
Q2686 Wireless CPU
®
Electrical Characteristics of SPK2
Parameters
Min
Typ Max Unit
Biasing
voltage
SPK2P and SPK2N
1.30
V
RL=8
Ω
: AT+VGR=-1000*; single
ended
- - 2 Vpp
RL=8
Ω
: AT+VGR=-1000*;
differential
- - 4 Vpp
RL=32
Ω
: AT+VGR=-1000*; single
ended
- - 2.5
Vpp
Output
swing
voltage
RL=32
Ω
: AT+VGR=-1000*;
differential
- - 5 Vpp
RL Load
resistance
6
8
-
Ω
IOUT
Output current; peak value; RL=8
Ω
- - 180
mA
POUT
RL=8
Ω
; AT+VGR=-1000*;
- - 250
mW
RPD
Output pull-down resistance at
power-down
28 40 52 k
Ω
VPD
Output DC voltage at power-down - - 100
mV
•
*The output voltage depends of the output speaker gain set by AT command. Please refer
to the document: AT command User Guide [7].This value is given in dB, but it’s possible to
toggle to index value.
If a singled ended solution is used with the speaker2 output, only one of the
both SPK2 has to be chosen. The result is a maximal output power divided by
4.
3.11.3
Pin description
Signal
Pin
number
I/O
I/O type
Description
MIC1P
40
I
Analog
Microphone 1 positive input
MIC1N
38
I
Analog
Microphone 1 negative input
MIC2P
36
I
Analog
Microphone 2 positive input
MIC2N
34
I
Analog
Microphone 2 negative input
SPK1P
35
O
Analog
Speaker 1 positive output
SPK1N
37
O
Analog
Speaker 1 negative output
SPK2P
39
O
Analog
Speaker 2 positive output
SPK2N
41
O
Analog
Speaker 2 negative output
