The LA72914V is a FM modulation and demodulation IC for audio signals. And it is possible to use that for the data
pulse or the control pulse, etc.
Functions
•
Alignment-free FM modulator and demodulator of 4.5MHz.
•
Alignment-free FM modulator and demodulator of 6.5MHz.
•
ALC/ FMAGC, Emphasis/ De-emphasis
•
Carrier frequency adjustment function, Standby switch
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
≤
70°C *
Conditions
Ratings
7.0
300
-20 to +70
-40 to +150
Unit
V
mW
°C
°C
When mounted on a 114.3mm
×
76.1mm
×
1.6mm, glass epoxy.
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.
Recommended Operating Conditions
at Ta = 25°C
Parameter
Recommended supply voltage
Allowable operating voltage range
Symbol
VCC
VCC op
Ta=25°C
Ta = -20 to +70°C
Conditions
Ratings
5.0
4.7 to 5.5
Unit
V
V
Semiconductor Components Industries, LLC, 2013
July, 2013
D0110 SY 20101118-S00005/N0410 SY/O2710 SY 20101008-S00006 No.A1859-1/9
LA72914V
Electrical Characteristics
at Ta
=
25°C, VCC = 5V
DC Characteristic
Parameter
2.4V regulator
Current dissipation
Symbol
VREG
ICC1
ICC2
Control pin (6 pin)
Low level
Control pin (6 pin)
Middle level
Control pin (6 pin)
High level
AGC stop at pin 11
control voltage
TX OFF mode at pin 16
control voltage
CNT16L
Voltage of input pin (pin 16) in TX off mode
0
0.4
V
AGCS
Voltage of input pin (pin 11) in AGC stop
4.5
5.0
V
CNT6H
High level of input pin (6pin) in 6.5MHz TX mode.
4.5
5.0
V
CNT6M
Middle level of input pin (6pin) in stand-by mode.
2.0
3.0
V
CNT6L
Conditions
min
Measure the DC voltage at pin 2
Measure the current into pin 4 in normal mode.
Measure the current into pin 4 in stand-by mode.
Low level of input pin (6pin) in 4.5MHz TX mode.
2.2
26.0
2.0
0
Ratings
typ
2.4
33.0
2.5
max
2.6
40.0
3.0
0.4
V
mA
mA
V
Unit
Sound FM Modulation Block (TX)
Parameter
FM carrier
output frequency
FM carrier output level
Symbol
FFM1
FFM2
VOFM1
VOFM2
FM carrier output
second harmonics
distortion
2HD1
2HD2
VFMT
DEV
FEMP
Conditions
Output frequency of T1B in no signals. T6=0.6V, T14:open
Output frequency of T1B in no signals. T6=4.2V, T14:open
Output level of T1B in no signals.
Load impedance = 1kΩ T1-GND. T6=0.6V
Output level of T1B in no signals.
Load impedance = 1kΩ T1-GND. T6=4.2V
2
nd
harmonics distortion of T1B in no signals.
Load impedance = 1kΩ T1-GND. T6=0.6V
2
nd
harmonics distortion of T1B in no signals.
Load impedance = 1kΩ T1-GND. T6=4.2V
FM carrier output mute
level
FM deviation
Emphasis
Characteristic
ALC characteristic
Output level of T1B in TX off mode. T6=0.6V (4.2V)
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
