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Micrel QwikRadio MICRF102, Final Information

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Micrel QwikRadio MICRF102 Final Information Download Page 10

MICRF102

Micrel

MICRF102

10

September 2002

MICRF102 Series Capacitor Calculation

f = 433.92 

×

 10

6

L = 52 

×

 10

-9

C

VAR

 = 5 

×

 10

-12

C

P

 = 2.7 

×

 10

-12

C

f

L

C

T

T

=

×

× ×

=

×

−

1

4

2 587 10

2

2

12

ππ

.

C

C

C

C

C

SERIES

T

VAR

P

SERIES

=

−

+

=

×

−

1

1

1

3 9 10

12

.

L1 = 52 

×

 10

-9

f1 = 433.92 ¥ 10

6

C

f

L

C

T

T

1

2

2

1

12

1

4

1

2 587 10

=

×

× ×

=

×

−

ππ

.

Summary of Contents for QwikRadio MICRF102

Page 1: ...erformance super hetero dyne receivers The transmitter is designed to work with transmitter data rates from 100 to 20k bits per second The automatic tuning in conjunction with the external resistor in...

Page 2: ...mit frequency divided by 32 Connect a crystal mode dependent between this pin and VSS or drive the input with an AC coupled 0 5Vpp input clock See Refer ence Oscillator Section in this data sheet 5 ST...

Page 3: ...te 5 tbd dBm 433MHz Note 4 Note 5 tbd dBm Transmitted Power 315MHz tbd V m 433MHz tbd V m Harmonics Output Note 10 315MHz 2nd harm 46 dBc 3rd harm 45 433 MHz 2nd harm 50 dBc 3rd harm 41 Extinction Rat...

Page 4: ...tion VPC 350mV Increasing the voltage on the PC pin will increase transmit power and also increase MARK supply current Refer to the graphs Output Power Versus PC Pin Voltage and Mark Current Versus PC...

Page 5: ...102 Micrel Typical Characteristics 0 5 10 15 20 25 0 100 200 300 400 500 600 CURRENT mA VPC mV Mark Current vs PC Pin Voltage 35 30 25 20 15 10 5 0 5 0 100 200 300 400 500 600 OUTPUT POWER dBm VPC mV...

Page 6: ...rol unit senses the antenna signal and con trols the PA bias current to regulate the antenna signal to the transmit power Functional Diagram TX Bias Control Varactor Device Antenna Tuning Control Powe...

Page 7: ...citor values have been selected is the mean current with a 1kHz signal in the ASK pin Refer to the Electrical Characteristics for the current values Note 4 For much smaller antennas place a blocking c...

Page 8: ...Application Test Circuit For Specification Verification Transmit Power The transmit power specified in this datasheet is normalized to a 50Ohm load The antenna efficiency will determine the actual ra...

Page 9: ...180 0 60 0 120 0 150 0 150 0 120 0 60 0 30 0 0 0 Figure 7 Polar Elevation pattern at 315MHz The 0 degree plot is the radiation pattern in the plane of the transmitter PCB the 90 degree plot represents...

Page 10: ...r 2002 MICRF102 Series Capacitor Calculation f 433 92 106 L 52 10 9 CVAR 5 10 12 CP 2 7 10 12 C f L C T T 1 4 2 587 10 2 2 12 C C C C C SERIES T VAR P SERIES 1 1 1 3 9 10 12 L1 52 10 9 f1 433 92 106 C...

Page 11: ...2 Micrel Package Information 45 3 6 0 244 6 20 0 228 5 80 0 197 5 0 0 189 4 8 0 063 1 60 MAX SEATING PLANE 0 026 0 65 MAX 0 016 0 40 TYP 0 154 3 90 0 057 1 45 0 049 1 25 0 193 4 90 0 050 1 27 TYP PIN...

Page 12: ...ww micrel com This information is believed to be accurate and reliable however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties r...

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