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参数资料
| 型号： | MICRF610TR |
| 厂商： | MICREL INC |
| 元件分类： | 通信及网络 |
| 英文描述： | 868-870 MHz ISM Band Transceiver Module |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, QMA16 |
| 封装： | 11.50 X 14.10 MM, MODULE-16 |
| 文件页数： | 8/20页 |
| 文件大小： | 698K |
| 代理商： | MICRF610TR |
Micrel, Inc.
MICRF610/MICRF610Z
July 2006
16
M9999-120205
The FEE can operate in three different modes; counting
only UP-pulses, only DN-pulses or counting UP+DN
pulses. The no. of received symbols to be counted is either
8, 16, 32 or 64. This is set by the FEEC_0…FEEC_3
control bit, as follows:
RSSI
33kohm, 1nF, 15kbps, BW=200kHz, Vdd=2.5V
0,5
0,75
1
1,25
1,5
1,75
2
2,25
-120
-110
-100
-90
-80
-70
-60
-50
Input power [dBm]
R
S
SI
vol
ta
g
e
[
V
]
FEEC_1
FEEC_0
FEE Mode
0
Off
0
1
Counting UP pulses
1
0
Counting DN pulses
1
Counting UP and DN pulses. UP
increments the counter, DN
decrements it.
FEEC_3
FEEC_2
No. of symbols used for the
measurement
0
8
0
1
16
1
0
32
1
65
Figure 10. RSSI Voltage
A Typical plot of the RSSI voltage as function of input
power is shown in Figure 10. The RSSI has a dynamic
range of about 50dB from about -110dBm to -60dBm input
power.
The RSSI can be used as a signal presence indicator.
When a RF signal is received, the RSSI output increases.
This could be used to wake up circuitry that is normally in
a sleep mode configuration to conserve battery life.
Table 8. FEEC Control Bit
The result of the measurement is the FEE value, this can
be read from register with address 0010110b. Negative
values are stored as a binary no between 0000000 and
1111111. To calculate the negative value, a two’s
complement of this value must be performed. Only FEE
modes where DN-pulses are counted (10 and 11) will give
a negative value.
Another application for which the RSSI could be used is to
determine if transmit power can be reduced in a system. If
the RSSI detects a strong signal, it could tell the
transmitter to reduce the transmit power to reduce current
consumption.
FEE
A6..A0
D7
D6
D5
D4
D3
D2
D1
D0
0010101
-
FEEC_3
FEEC_2
FEEC_1
FEEC_0
0010110
FEE_7
FEE_6
FEE_5
FEE_4
FEE_3
FEE_2
FEE_1
FEE_0
When the FEE value has been read, the frequency offset
can be calculated as follows:
Mode UP:
Foffset = R/(2P)x(FEE-Fp)
The Frequency Error Estimator (FEE) uses information
from the demodulator to calculate the frequency offset
between the receive frequency and the transmitter
frequency. The output of the FEE can be used to tune the
XCO frequency, both for production calibration and for
compensation for crystal temperature drift and aging.
Mode DN:
Foffset = R/(2P)x(FEE+Fp)
Mode UP+DN: Foffset = R/(4P)x(FEE)
where FEE is the value stored in the FEE register, (Fp is
the single sided frequency deviation, P is the no. of
symbols/data bit counted and R is the symbol/data rate. A
positive Foffset means that the received signal has a
higher frequency than the receiver frequency. To
compensate for this, the receivers XCO frequency should
be increased.
The input to the FEE circuit are the up and down pulses
from the demodulator. Every time a ‘1’ is updated, an UP-
pulse is coming out of the demodulator and the same with
the DN-pulse every time the ‘0’ is updated. The expected
no. of pulses for every received symbol is 2 times the
modulation index ().
It is recommended to use Mode UP+DN for two reasons,
you do not need to know the actual frequency deviation
and this mode gives the best accuracy.
Bit Synchronizer
A6..A0
D7
D6
D5
D4
D3
D2
D1
D0
0000110
-
‘0’
BitSync_clkS2 BitSync_clkS1 BitSync_clkS0 BitRate_clkS2
0000111 BitRate_clkS1 BitRate_clkS0 RefClk_K5 RefClk_K4
RefClk_K3
RefClk_K2
RefClk_K1
RefClk_K0
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相关代理商/技术参数 |
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| MICRF610Z | 功能描述:IC RF MOD 868-870MHZ 11.5X14.1MM RoHS:是 类别:RF/IF 和 RFID >> RF 收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘 包装:管件 |
| MICRF610Z TR | 功能描述:IC RF MOD 868-870MHZ 11.5X14.1MM RoHS:是 类别:RF/IF 和 RFID >> RF 收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘 包装:管件 |
| MICRF620 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:434MHz ISM Band Transceiver Module |
| MICRF620_0608 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:434MHz ISM Band Transceiver Module |
| MICRF620DEV1 | 制造商:Micrel Inc 功能描述:DEVELOPMENT KIT TRANSCEIVER 433MHZ |
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