Telecomunicaciones

Rapid Electronics Ltd MK484 RADIO IC
Description

DATA SHEET

The MK484 is a monolithic integrated circuit designed in a TO92 package for use as a one chip radio solution, high sensitivity andhigh 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.Features
§ § § § Stable operation with 1.1V Low Drain Current Small and light weight (TO92 Package) Wide AGC Ranging

MK 484

1 2 3

Maximum Ratings
Item Operating Temperature StorageTemperature 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
ItemSupply Voltage Output Voltage Drain Current Cover Range Input Resistance Total Harmonic Distortion AGC Range Power Gain

Symbol
VCC VOUT ICC ƒR ZIN AGC GP

Min
1.1 0.8 150 30 -

Typ
1.4 0.3 4 470

Max
1.8 1.5 3,000 -

Unit
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 providesa 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 isextremely 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 willrun 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 enclosedinformation 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...