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An adjustment-free FM radio function can be included with absolutely no external components.
Since an ultraminiature 5.0 × 5.0 × 0.8 mm
3
package is used, this device is extremely useful for including an FM radio function in
cell phones, PDAs, memory audio players, and other portable electronic equipment.
1716
System-on-chip FM Radio ICs
for Miniature Cell Phones
The LV24000 family devices are FM radio ICs that require absolutely no external components.*
These devices include not only the FM radio function, but source selector, master volume control, tone controls,
headphone amplifier, and other functions in the same tiny 5.0 × 5.0 × 0.8 mm
3
VQLP package.
These ICs are superb for adding new FM radio functionality in the small limited space available in existing products,
such as cell phones and other portable electronic equipment.
Featuring
LV24002
LINE-IN L
LINE-IN R
CLK
DATA
NR_W
HEADPHONE L
HEADPHONE R
LINE-OUT L
LINE-OUT R
Quadrature
Oscillator
Quadrature
Mixer
Selectivity
Demodulator
Stabilisator
Power
Switch
Stereo
Decoder
Deemphasis
Source
Selector
Beep
Generator
Headphone
Amplifier
Volume
& Tone
Control
Tuning
System
Digital
Interface
FM Ant.
LV24002
Cellular
Phone
Head Amp
Cell phone (1)
LV24000: FM radio function
Cell phone (2)
LV24002: FM radio + source selector
+ headphone amplifier functions
LV24000
Source
Selector
Source
Selector
Volume
Volume
Head Amp
FM
FM
Cellular
Phone
(Basic)
Earlier products
No external
components
requried
SANYO Easy Radio IC
TM
LV24000
Including All the Functions
● FM function (LV24020)
● FM+AM function (LV24100)
● FM+RDS function (LV24010)
● FM+amplifier function (LV24003)
Not only reducing the device prices
but also reducing the various costs during development
● Absolutely no external components required
● Absolutely no adjustments required
● Low IF frequency (110 kHz) adopted for improved
selectivity
● No FM detection discriminator required
● Built-in adjacent channel interference function (114 and
190 kHz)
● New tuning technique
● Ultrahigh sensitivity reception achieved by low-noise
mixer input circuit
● Low-current standby mode obviates the need for a power
supply switch
● RDS composite output
● Three-wire bus interface adopted (clock, data, and NR-W)
● Digital AFC function
● Soft muting and high-blend stereo (3-stage
programmable)
● Supports manual search, automatic search, and auto-
preset functions
● Supports reception in all regions worldwide (all Japanese,
European, and US bands can be received by changing
just the software)
● Master volume control
● FM: 76 to 108 MHz
● Source selector function (LV24001)
● Headphone amplifier (LV24002)
FM Radio IC
New
product
Easy Radio IC
TM
LV24000 Series
Application Example
LV24002 Block diagram
■ Comparison with earlier products
*: A separate coil is required for applications that include an AM radio
An FM radio can be easily included in a limited space in a small product