Download Rapid Electronics Ltd DATA SHEET MK484 RADIO IC

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Electrical ballast wikipedia , lookup

Power inverter wikipedia , lookup

History of electric power transmission wikipedia , lookup

Tube sound wikipedia , lookup

Fault tolerance wikipedia , lookup

Variable-frequency drive wikipedia , lookup

Telecommunications engineering wikipedia , lookup

Printed circuit board wikipedia , lookup

Islanding wikipedia , lookup

Electrical substation wikipedia , lookup

Ohm's law wikipedia , lookup

Current source wikipedia , lookup

Stray voltage wikipedia , lookup

Two-port network wikipedia , lookup

Triode wikipedia , lookup

Voltage regulator wikipedia , lookup

Surface-mount technology wikipedia , lookup

Immunity-aware programming wikipedia , lookup

Power MOSFET wikipedia , lookup

Voltage optimisation wikipedia , lookup

Surge protector wikipedia , lookup

Rectifier wikipedia , lookup

Regenerative circuit wikipedia , lookup

Earthing system wikipedia , lookup

Schmitt trigger wikipedia , lookup

Alternating current wikipedia , lookup

Buck converter wikipedia , lookup

Resistive opto-isolator wikipedia , lookup

Current mirror wikipedia , lookup

Mains electricity wikipedia , lookup

Network analysis (electrical circuits) wikipedia , lookup

Switched-mode power supply wikipedia , lookup

Opto-isolator wikipedia , lookup

Transcript
Rapid Electronics Ltd
DATA SHEET
MK484 RADIO IC
Description
The MK484 is a monolithic integrated circuit designed in a TO92 package for use as a one chip radio solution, high
sensitivity and high quality AM radio is possible with very few external components.
Special features of the circuit include low supply voltage operation, the
device is particularly suited to small hand-held radios.
MK
484
Features
§
§
§
§
Stable operation with 1.1V
Low Drain Current
Small and light weight (TO92 Package)
Wide AGC Ranging
1 2 3
Maximum Ratings
Item
Operating Temperature
Storage Temperature
Supply Voltage
Symbol
Topr
Tstg
Vcc
Rating
-30 to +80
-40 to +125
1.5
Unit
ºC
ºC
V
Pin No.
Symbol
Description
1
2
3
Vss
I/P
O/P
Gnd
Input
Output
Electrical Characteristics
Item
Symbol
Min
Typ
Max
Unit
Supply Voltage
Output Voltage
Drain Current
Cover Range
Input Resistance
Total Harmonic Distortion
AGC Range
Power Gain
VCC
VOUT
ICC
ƒR
ZIN
AGC
GP
1.1
0.8
150
30
-
1.4
0.3
4
4
70
1.8
1.5
3,000
-
V
mV
mA
KHz
MΩ
%
dB
dB
VCC = 1.4V, RAGC = 1.5KΩ, = 1,000KHz
Modulation 1,000Hz 40%, Vin = 1mV (RMS)
(1) RAGC = 100 – 1.5KΩ
Example Circuit
This circuit provides a complete RF amplifier, Detection and AGC circuit, which requires only a
few external components to give a high quality AM Tuner. Good audio quality can be achieved,
and current consumption is extremely low. No setting up or alignment is required and the circuit
is completely stable in use.
The MK484 has an input impedance of 4MΩ and operates over a frequency range of 150KHz to
3MHz. The IC will run off a DC supply of between 1.1V and 1.8V. A current drain of 0.3mA
makes it suitable for battery operation. The IC provides an output of 40 to 60 mV.
MK484 RADIO IC
82-1026
The enclosed information is believed to be correct, Information may change ‘without notice’ due to
product improvement. Users should ensure that the product is suitable for their use. E. & O. E.
Revision B
15/02/2001
Page 1 of 2
Rapid Electronics Ltd, Severalls Lane, Colchester, Essex, England, CO4 5JS
Telephone 01206 751166
Fax 01206 751188
e-mail [email protected]
Cont’d..
126pF
The coil needs approximately 55 turns of 0.315mm diameter enamelled copper wire on a 100mm
long ferrite rod. A process of trial and error will help you achieve the optimum number of windings
on the ferrite rod.
In general the thicker the wire or larger the ferrite rod diameter the fewer the number of turns
required.
PCB Layout for the above circuit