CXA1884N View Datasheet(PDF) - Sony Semiconductor
Part Name
Description
Manufacturer
CXA1884N Datasheet PDF : 16 Pages
| |||
7) OP AMP, NRZ OUT
This IC has 2 built-in operation amplifiers.
One of these operation amplifiers is connected inside the IC to NRZ comparator.
14
13
12
11
CXA1884N
0.2V
10
Fig. 4
Making use of these operation amplifiers an LPF or the sort is made up to eliminate noise during signal
demodulation and input to the following NRZ comparator.
NRZ comparator molds the waveform of input signals to output them as square waves. NRZ comparator output
is an open collector.
Accordingly as CPU is a CMOS, in case the supply voltage differs, by following the method indicated in Fig. 5
direct interfacing becomes possible.
VCC 1.5V
VCC 4
VCC for CMOS IC
14
NRZ
OUT
CMOS IC
Fig. 5
8) VB SENSE, VB OUT
This controls the base bias of the external transistor. Pin 16 VB OUT can be used as the previous amplifier 1st
mixer bias.
9) LVA OUT
When supply voltage turns low this pin turns to High (Open). Output is an open collector, and similarly as NRX
OUT, can directly drive CMOS.
This LVA setting voltage is at 1.05V ± 50mV with hysterisis versus supply voltage.
Hysterisis width is at 50mV ± 10mV.
– 12 –
Share Link: 