The LA1225MC is a Low-voltage operation (1.8V or higher) FM IF detector IC for the electronic tuning system.
Features
•
Low-voltage operation (1.8V or higher)
•
Supports electronic tuning systems (provides built-in SD output and IF count output functions)
•
FM detector circuit accepts an even wider input frequency range. (Supports the use of an external phase capacitor.)
•
Miniature package: SOIC10
Functions
•
IF amplifier
•
Quadrature detector
•
Signal meter
•
SD
•
IF buffer
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Ta
≤
85°C
Conditions
Ratings
9.0
100
-20 to +85
-55 to +150
Unit
V
mW
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Operating Conditions
at Ta = 25°C
Parameter
Recommended supply voltage
Operating supply voltage range
Symbol
VCC
VCC op
Conditions
Ratings
3.0
1.8 to 8.0
Unit
V
V
Semiconductor Components Industries, LLC, 2013
May, 2013
41812 SY 20120411-S00004 No.A2052-1/8
LA1225MC
Operating Characteristics
at Ta
=
25°C, VCC = 3.0V, fC
=
10.7MHz
Ratings
Parameter
Current drain
Demodulator output
Total harmonic distortion
Signal-to-noise ratio
3dB sensitivity
SD sensitivity
IF counter buffer output
Symbol
ICCO
VO
THD
S/N
-3dBL.S
SDON
VIFBuff
No input
100dBμV, 100% mod., fm = 1kHz
100dBμV, 100% mod., fm = 1kHz
100dBμV, 100% mod., fm = 1kHz
100dBμV, 100% mod.,
fm = 1kHz output reference, when the input is -3dB
1. Introduction
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