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PDF CXA3099N Data sheet ( Hoja de datos )
| Número de pieza | CXA3099N | |
| Descripción | IF Amplifier for M-ary FSK Pagers | |
| Fabricantes | Sony Corporation | |
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CXA3099N
IF Amplifier for M-ary FSK Pagers
For the availability of this product, please contact the sales office.
Description
The CXA3099N is a low current consumption FM
IF amplifier which employs the newest bipolar
process. It is suitable for M-ary FSK pagers.
16 pin SSOP (Plastic)
Features
• Low current consumption: 590 µA
(typ. at VCC = 1.4 V)
• Low voltage operation: VCC = 1.1 to 4.0 V
• Small package 16-pin SSOP
• Needless of IF decoupling capacitor
• Reference power supply for operational amplifier
and comparator
• IF input, VCC standard
Applications
M-ary FSK pagers
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
• Supply voltage
VCC 7.0 V
• Operating temperature
Topr –20 to +75 °C
• Storage temperature
Tstg –65 to +150 °C
• Allowable power dissipation PD
312 mW
Operating Condition
Supply voltage
VCC1 1.1 to 4.0 V
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
—1—
E95Y24A8Z
1 page  
CXA3099N
Pin
Symbol
Pin voltage
No.
14 REG CONT
—
Equivalent circuit
VCC
14
72
GND
Description
Output for internal constant-
voltage source amplifier.
Connect the base of PNP
transistor.
(Current capacity: 100 µA)
VCC
15 REG OUT
1.0 V
16 VCC
78k
15
1k
22k
Constant-voltage source output.
Controlled to maintain 1.0 V.
GND
Power supply.
—5—
5 Page 
CXA3099N
4) Detector
The detector is of quadrature type. To perform phase shift, connect a ceramic discriminator to Pin 5.
The phase shifting capacitor for the quadrature detector is incorporated. The FM (FSK) signal with the
demodulated detector will be output to DET OUT (Pin 6) through the internal primary LPF.
DET OUT output impedance is 200 Ω or less. The DET OUT output is the anti-phase output to NRZ OUT.
The CDBM455C28 (MURATA MFG. CO., LTD.) ceramic discriminator is recommended for the CXA3099N.
45 6
DET OUTPUT
4.7k
Ceramic discriminator
CDBM455C28
VCC
Fig. 4
5) Filter Buffer, Level Comparator and NRZ Comparator
An operational amplifier for LPF is built in this IC.
It is connected internally to the NRZ comparator, level comparator and quick charge circuit.
12 11 10 9 8
L.C.
7
0.2V
4
Fig. 5
Using the operational amplifier of Pins 7 and 8 to construct an LPF, remove noise from the demodulated
signal and input the signal to the above three circuits.
The level comparator and the NRZ comparator shape waveform of this input signal and output it as a
square wave. The comparator output stage is for open collector.
Thus, if the CPU is of CMOS type and the supply voltage is different, a direct interface as illustrated in the
figure below can be implemented.
VCC 1.4V
VCC 16
CMOS power supply
(10)
12 CMOS IC
Comparator output
Fig. 6
6) REG CONT
Controls the base bias of the external transistors.
—11—
11 Page | ||
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