CXA1994

Manufacturer Part NumberCXA1994
DescriptionM-ary FSK Demodulating Comparator
ManufacturerSONY [Sony Corporation]
CXA1994 datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
Page 1/8

Download datasheet (123Kb)Embed
Next
M-ary FSK Demodulating Comparator
For the availability of this product, please contact the sales office.
Description
The CXA1994AM/BM is a comparator which allows
the M-ary (4-level) FSK data to be demodulated in
combination with an FM IF amplifier for pagers.
Features
• Low power consumption
70µA (at V
= 1.4V, including the current on
CC
battery saving control pin)
• Low voltage operation
V
= 1.0 to 4.0V
CC
Applications
M-ary FSK pagers
Function
• Window comparator for MSB detection
• Battery saving control pin
• Threshold level adjustment pin
Block Diagram
8
7
1
2
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.
CXA1994AM/BM
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
• Operating temperature
• Storage temperature
Operating Conditions
• Supply voltage
6
5
3
4
– 1 –
8 pin SOP (Plastic)
V
7.0
CC
Topr
–20 to +75
Tstg
–65 to +150
V
1.0 to 4.0
CC
E96428A8Y
V
°C
°C
V

CXA1994 Summary of contents

  • Page 1

    ... M-ary FSK Demodulating Comparator For the availability of this product, please contact the sales office. Description The CXA1994AM/ comparator which allows the M-ary (4-level) FSK data to be demodulated in combination with amplifier for pagers. Features • Low power consumption 70µA ( 1.4V, including the current on ...

  • Page 2

    ... Equivalent circuit GND GND GND – 2 – CXA1994AM/BM Description Vcc. Adjusts the threshold level for comparator Signal input. Connected to the COMP IN pin of the CXA1484A. GND Reference input. Connected to the SENSE pin of the CXA1484A. Comparator output. Ground. ...

  • Page 3

    ... Battery saving control pin. Battery saving state for low; normal operation for high. Symbol Condition CCS reference COMPH REF reference COMPL REF Vsat V THH V THL – 3 – CXA1994AM/ 1.4V 25°C) CC Min. Typ. Max. Unit 70 100 µA 6 µ –50 mV 0.4 V 0.9 V 0.35 V ...

  • Page 4

    ... Electrical Characteristics Measurement Circuit The comparator level can be set lower by inserting a resistor between Pin 1 (V B.S. control CXA1994AM/ 0.01µ 5.1k 1µ DATA IN [from DATA (DC 0.2V IC] – 4 – CXA1994AM/BM DATA OUT REF [from REF (0.2V IC] ) and Pin 2. CC ...

  • Page 5

    ... CXA1994AM/BM ...

  • Page 6

    ... The MSB comparator output is made comparing to the optional level setting between MSB and LSB levels as reference. For the 2-level FSK demodulation, it corresponds to a conventional NRZ comparator output. Take care that the polarity of NRZ output is inverted in CXA1484A. +4.8kHz +1.6kHz –1.6kHz –4.8kHz – 6 – CXA1994AM/ ...

  • Page 7

    ... H threshold level L H threshold level H L threshold level 10 20 Resistance between Pins 1 and Threshold level temperature characteristics H L threshold level L H threshold level L H threshold level H L threshold level – Temperature [°C] – 7 – CXA1994AM ...

  • Page 8

    ... M PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT SOP-8P-L01 LEAD MATERIAL SOP008-P-0300-A PACKAGE WEIGHT – 8 – + 0.4 1.25 – 0.15 0.10 + 0.15 0.1 – 0.1 0° to 10° DETAILA EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 0.1g + 0.4 1.85 – 0.15 0.15 + 0.2 0.1 – 0.05 + 0.1 – 0.05 EPOXY RESIN SOLDER PLATING COPPER / 42 ALLOY 0.1g CXA1994AM/BM ...