Rohm BA4116FV Fm if detector for cordless phone Datasheet

Communication ICs
FM IF detector for cordless phones
BA4116FV
The BA4116FV is an IC with mixing circuit, IF circuit, FM detector circuit, RSSI circuit, and noise detector circuit. As it
can operate at low voltages, it is ideal for use in cordless phones.
Applications
Cordless phones, amateur short wave radios, and other portable wireless equipment
Features
1) Input frequencies of 10MHz to 150MHz can be accommodated.
2) Low-voltage operation. (1.8 to 5.5V)
3) Excellent temperature characteristic.
Absolute maximum ratings (Ta = 25C)
Recommended operating conditions (Ta = 25C)
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4) High sensitivity; 12dB SINAD sensitivity = 8dBµVEMF
(50 Ω)
5) High intercept point. (–11dBm)
6) Small package used. (0.65mm pitch)
Communication ICs
BA4116FV
Block diagram
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Communication ICs
Pin descriptions
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BA4116FV
Communication ICs
BA4116FV
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Communication ICs
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BA4116FV
Communication ICs
BA4116FV
Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 2.0V, fIN (Mix) = 21.7MHz, fIN (IF) = 450kHz,
∆f = ±1.5kHzdev, fm = 1kHz, all AC levels open (EMF) display)
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Communication ICs
Measurement circuit
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BA4116FV
Communication ICs
BA4116FV
Application example
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Communication ICs
BA4116FV
FAttached components
FDetermining the filter amplifier constant (multi-layer recovery band pass filter)
f0: Center frequency
Q: Center frequency f0 / band width BW
A0: I / O gain
The reference resistance R0 is determined as C1 = C2 =
C0.
R0 = 1 / 2πf0 S C0
R1 = R0 S Q / A0
R2 = R0 / [2Q - (A0 / Q)]
R3 = 2R0 S Q
The Filter gain can be adjusted by varying R1, but with the
A0 > 1 design, please be aware that influence from the
open loop characteristic of the amplifier causes offset in
the center frequency f0.
FElectrical characteristic curves
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Communication ICs
BA4116FV
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Communication ICs
External dimensions (Units: mm)
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BA4116FV
Appendix
Notes
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The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
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exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
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About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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