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参数资料
| 型号： | RI-RFM-006A-00 |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | TIRIS RF-Module IC for Automotive |
| 中文描述： | 提里斯射频集成电路模块汽车 |
| 文件页数： | 14/20页 |
| 文件大小： | 148K |
| 代理商： | RI-RFM-006A-00 |
Rev. 3.5
RI-RFM-006A
TIRIS
RF-Module IC for Automotive
Page 13 of 19
!
Applied Circuit Configuration - Example
Shown below is an example of applied circuit configuration for constructing a
TIRIS
Transmit-Receive
RF-module using the RI-RFM-006A. This example illustrates a simplified amplifier circuit for received
signals by eliminating a frequency band rejection filter which effectively eliminates external noises and
signals out of the frequency band of the response signals from the remote
TIRIS
transponder. In this
configuration, therefore, it is assumed that the available data communication distance of the system could
be easily affected by environmental conditions.
Note that this is only one of various possible applications. For more information of applied circuit
configurations, refer to the Application Handbook issued by our
TIRIS
Operation Dept.
* When configuring an applied circuit, take the following into account:
Choose the capacity of a resonance capacitor for clock generator oscillator in accordance with the
oscillator characteristics.
Define the frequency accuracy and variation of the clock generator oscillator by conversion based on
the specifications for the
TIRIS
transponder to be used together so that it can be within the range of
17.17248 MHz to 17.18272 MHz (standard frequency: 17.1776 MHz).
Select the values at resonance points around 134.2 kHz for L and C of the antenna circuit,
respectively. (In the example illustrated above, the following combination is used: antenna: 48
μ
H;
capacitor: 0.03
μ
F = 0.01
μ
F x 3 units)
It is desirable to use a MOSFET having a low on-state resistance for antenna driver
TMS57780NS
9
10
11
12
13
14
15
16
5
1
2
3
4
6
7
8
ANTENNA
(L=48uH)
VCC
GND
TXCT
RXDT
RXCK
NC
1M
1200pF
68pF
68pF
68pF
0.01uF 0.01uF 0.01uF
120pF
120pF
1M
10K
100
1S1588
1S1588
120
100uF
0.1uF
17.1776MHz
(*)
(*)
2SJ182
2SK974
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