µPC8126K
Supply Pin
Pin
Symbol Voltage Voltage (V)
No.
(V)
@3 V
Description
Equivalent Circuit
12
Qb
VCC/2
–
Input for Q signal.
This input impedance is 180 kΩ.
In case of that I/Q input signals are
single ended, VCC/2 biased DC
signal should be input.
In case of that I/Q input signals are
differential, amplitude of the signal is
250 mVP-P max.
Note
12
13
13
Q
VCC/2
–
Input for Q signal.
This input impedance is 180 kΩ.
In case of that I/Q input signals are
single ended, amplitude of the signal
is 500 mVP-P max.
Note
14
GND
0
(Modulator)
–
Ground pin for the modulator.
Connect to the ground with minimum
inductance.
Track length should be kept as short
as possible.
–––––––––––––
16
VCC3
2.7 to 3.6
–
Supply voltage pin for the output
buffer amplifier of modulator.
An internal regulator helps keep the
device stable against temperature or
VCC variation.
–––––––––––––
17 MODout
–
1.6
Output pin from the modulator.
This is emitter follower output.
So this output impedance is low.
17
19
GND
0
(Modulator)
20
VPS2
VPS
(Pre-Mix)
–
Ground pin for the modulator.
Connect to the ground with minimum
inductance.
Track length should be kept as short
as possible.
–
Power save control pin can control
the On/Sleep state with bias as
follows.
VPS (V)
State
2.2 to 3.6 ON (Active Mode)
0 to 0.5 OFF (Sleep Mode)
–––––––––––––
20
Note Relations between amplitude and VCC/2 bias of input signal are following.
Preliminary Data Sheet P13488EJ1V0DS00
9