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參數資料
| 型號： | MICRF102YM TR |
| 廠商： | Micrel Inc |
| 文件頁數： | 9/12頁 |
| 文件大?。?/td> | 335K |
| 描述： | IC TRANSMITTER ASK UHF 8-SOIC |
| 標準包裝： | 2,500 |
| 頻率： | 300MHz ~ 470MHz |
| 應用： | RKE |
| 調制或協議： | ASK，OOK |
| 數據傳輸率 - 最大： | 20 kbps |
| 功率 - 輸出： | -4dBm |
| 電流 - 傳輸： | 4.7mA |
| 數據接口： | PCB，表面貼裝 |
| 天線連接器： | PCB，表面貼裝 |
| 電源電壓： | 4.75 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | MICRF102YMTR MICRF102YMTR-ND |
December 2006
9
MICRF102
MICRF102
Micrel
Design Examples
Complete reference designs including gerber les can be
downloaded from Micrels website at: www.micrel.com/prod-
uct-info/qwikradio.shtml.
Antenna Characteristics
In this design, the desired loop inductance value is determined
according to the table below.
Freq.
R
XL
Ind
Q
K
(MHz) (&)
(&)
(nH)
(XL/R)
300
1.7
84.5
44.8
39.72
0.83
315
2.34 89.3
45.1
39.65
0.85
390
3.2
161
47.4
52.00
0.90
434
2.1
136
50.0
78.33
0.96
The reference design, shown in Figure 7, has an antenna
meeting this requirement.
Figure 7. Demo Board PCB.
Loop antennas are often considered highly directional. In
fact small loop antennas can achieve transmit patterns close
in performance to a Dipole antenna. The radiation pattern
below is the theoretical radiation pattern for the antenna, as
shown in Figure 8.
E-total, phi = 0?/DIV>
E-total, phi = 90?/DIV>
(180-phi) direction
phi direction
30.0
180.0
60.0
120.0
150.0
150.0
120.0
60.0
30.0
0.0
Figure 8. 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 the plane
perpendicular to the PCB. Micrels evaluation of the perfor-
mance of the board in Figure 8 indicates an even more uniform
radiation pattern that the theoretical plot shown here.
Supply Bypassing
Supply bypassing consists of three capacitors; C3 = 4.7礔,
C4 = 0.1礔and C5 = 100pF
C4
0.1礔
16V
C5
100pF
50V
C3
4.7礔
16V
+5VTX
VDD
V
SS
MICRF102
2
3
PC
1
ASK 8
ANTP 7
ANTM 6
SB 5
REFOSC
4
Figure 9. Supply Bypassing
Example to Calculate C
S
and C
P
Antenna Inductance
Calculation
Length_mils = 2815
dmils = 70
k = 0.85
Length
Length_mils 25.4
1000
Length 71.501
=
?/DIV>
(
)
=
d
dmils
d
=
?/DIV>
(
)
=
25 4
1000
1 778
.
.
L 0.2 Length ln
Length
d
1.6 10
k
L 44 10
9
9
=
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
= ?/DIV>
Where Length and d are in mm and L is in H;
Where k is a constant dependent on PCB material, copper
thickness, etc.
MICRF102 Series Capacitor Calculation:
f = 315 ?10
6
L = 46 ?10
-9
C
VAR
= 5 ?10
-12
C
P
= 12 ?10
-12
C
f L
C
T
T
=
?nbsp ?nbsp ?/DIV>
=
?/DIV>
1
4
2 587 10
2
2
12
??/DIV>
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.
C
C
C
C
SERIES
T
V AR
SERIES
=
=
?/DIV>
1
1
1
8 2 10
12
.
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
=
?nbsp ?nbsp ?/DIV>
=
?/DIV>
1
4
2 587 10
2
2
12
??/DIV>
.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MICRF103 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:QwikRadio UHF ASK Transmitter |
| MICRF103BM | 功能描述:IC ASK TRANSMITTER UHF 8SOIC RoHS:否 類別:RF/IF 和 RFID >> RF 發射器 系列:- 標準包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應用:- 調制或協議:UHF，ASK 數據傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數據接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲容量:- 特點:- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| MICRF103BM TR | 功能描述:IC TRANSMITTER ASK UHF 8-SOIC RoHS:否 類別:RF/IF 和 RFID >> RF 發射器 系列:- 標準包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應用:- 調制或協議:UHF，ASK 數據傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數據接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲容量:- 特點:- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| MICRF103YM | 功能描述:IC ASK TRANSMITTER UHF 8SOIC RoHS:是 類別:RF/IF 和 RFID >> RF 發射器 系列:- 標準包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應用:- 調制或協議:UHF，ASK 數據傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數據接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲容量:- 特點:- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| MICRF103YM TR | 功能描述:IC TRANSMITTER ASK UHF 8-SOIC RoHS:是 類別:RF/IF 和 RFID >> RF 發射器 系列:- 標準包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應用:- 調制或協議:UHF，ASK 數據傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數據接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲容量:- 特點:- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
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