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| 型号： | MICRF007BM |
| 厂商： | Micrel Inc |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC RECEIVER UHF LOW POWER 8SOIC |
| 标准包装： | 95 |
| 频率： | 300MHz ~ 440MHz |
| 灵敏度： | -96dBm |
| 数据传输率 - 最大： | 2.1 kbps |
| 调制或协议： | ASK，OOK |
| 应用： | RKE |
| 电流 - 接收： | 3mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 特点： | 自动调谐 |
| 电源电压： | 4.75 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
MICRF007
Micrel
? V = droop voltage
For example, if user desires ? t = 10ms and chooses a 4.7μF
C AGC , then the allowable droop is about 144mV. Using the
same equation with 200nA, the worst case pin leakage, and
assuming 1μA of capacitor leakage in the same direction,
the maximum allowable ? t (shutdown time) is about 0.56s
for droop recovery in 10ms.
The ratio of decay-to-attack time-constant is ?xed at 1:10
(that is, the attack time constant is 10 times of the delay time
constant). Generally, the design value of 1:10 is adequate for
the vast majority of applications. If adjustment is required,
adding a resistor in parallel of the C AGC capacitor may vary
the ratio. The value of the resistor must be determined on a
case by case basis.
Additional Applications Information
In addition to the basic operation of the MICRF007, the fol-
lowing enhancements can be made. In particular, it is strongly
recommended that the antenna impedance is matched to
the input of the IC.
Antenna Impedance Matching
As shown in Figure 2 and Table 3, the antenna pin input
impedance is frequency dependent.
The ANT pin can be matched to 50Ω with a high pass circuit
as shown in Figure 3. That is, a shunt inductor from the
antenna input to ground and a capacitor in series from the
antenna input to the ANT pin.
F r e q u e n c y
( M H z )
3 0 0
3 0 5
3 1 0
3 1 5
3 2 0
3 2 5
3 3 0
3 3 5
3 4 0
3 4 5
3 5 0
3 5 5
3 6 0
3 6 5
3 7 0
3 7 5
3 8 0
3 8 5
3 9 0
3 9 5
Z I N ( Ω )
Z 1 1
1 2 – j 1 6 6
1 2 – j 1 6 5
1 2 – j 1 6 3
1 3 – j 1 6 2
1 2 – j 1 6 0
1 2 – j 1 5 7
1 2 - j 1 5 5
1 2 – j 1 5 2
1 1 - j 1 5 0
1 1 – j 1 4 8
1 1 – j 1 4 5
1 1 – j 1 4 3
1 1 – j 1 4 1
1 1 – j 1 3 9
10 – j1 3 7
1 0 – j 1 3 5
1 0 – j 1 3 3
1 0 – j 1 3 1
1 0 – j 1 3 0
1 0 – j 1 2 8
S 1 1
0 . 8 0 3 – j 0 . 5 2 9
0 . 8 0 0 – j 0 . 5 3 0
0 . 7 9 6 – j 0 . 5 3 6
0 . 7 9 1 – j 0 . 5 3 6
0 . 7 8 9 – j 0 . 5 4 3
0 . 7 8 2 – j 0 . 5 5 0
0 . 7 7 8 – j 0 . 5 5 6
0 . 7 7 0 – j 0 . 5 6 4
0 . 7 6 7 – j 0 . 5 7 2
0 . 7 6 2 – j 0 . 5 7 8
0 . 7 5 3 – j 0 . 5 8 6
0 . 7 4 8 – j 0 . 5 9 2
0 . 7 4 2 – j 0 . 5 9 7
0 . 7 3 5 – j 0 . 6 0 3
0 . 7 3 2 – j 0 . 6 1
0 . 7 2 5 – j 0 . 6 1 9
0 . 7 1 8 – j 0 . 6 2 5
0 . 7 1 1 – j 0 . 6 3 1
0 . 7 0 7 – j 0 . 6 3 4
0 . 7 0 0 – j 0 . 6 4 1
C SERIES (pF)
1.5
1.4
1.6
1.5
1.4
1.7
1.5
1.4
1.6
1.5
1.4
1.6
1.5
1.4
1.3
1.6
1.4
1.3
1.2
1.5
L SHUNT (nH)
62
62
56
56
56
51
51
51
47
47
47
43
43
43
43
39
39
39
39
36
j25
j100
4 0 0
4 0 5
4 1 0
4 1 5
1 0 – j 1 2 6
1 0 – j 1 2 4
1 0 – j 1 2 2
1 0 – j 1 2 0
0 . 6 9 2 – j 0 . 6 4 7
0 . 6 8 4 – j 0 . 6 5 3
0 . 6 7 5 – j 0 . 6 6 0
0 . 6 6 7 – j 0 . 6 6 7
1.4
1.2
1.5
1.4
36
36
33
33
0
50
?
4 2 0
4 2 5
1 0 – j 1 1 8
1 0 – j 1 1 7
0 . 6 5 8 – j 0 . 6 7 3
0 . 6 5 3 – j 0 . 6 7 7
1.3
1.6
33
30
4 3 0
4 3 5
4 4 0
1 0 – j 1 1 5
1 0 – j 1 1 4
8 – j 1 1 2
0 . 6 4 3 – j 0 . 6 8 4
0 . 6 3 8 – j 0 . 6 8 7
0 . 6 3 5 – j 0 . 7 0 4
1.5
1.4
1.2
30
30
30
–j25
–j100
Table 4. Input Impedance vs. Frequency
Figure 2. Impedance Looking into Antenna Pin
C SERIES
ANT Pin
L SHUNT
Figure 3. Antenna Impedance Matching Network
M9999-021705
8
February 17, 2005
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相关代理商/技术参数 |
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| MICRF007BM TR | 功能描述:IC RECEIVER UHF 300MHZ 8-SOIC RoHS:否 类别:RF/IF 和 RFID >> RF 接收器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 09/Jan/2012 标准包装:50 系列:* 频率:850MHz ~ 2.175GHz 灵敏度:- 数据传输率 - 最大:- 调制或协议:- 应用:* 电流 - 接收:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 特点:- 电源电压:4.75 V ~ 5.25 V 工作温度:0°C ~ 85°C 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| MICRF007YM | 功能描述:射频接收器 300-440MHz Receiver, 1.2kbps, 1.7mA With Shutdown( Lead Free) RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel |
| MICRF007YM TR | 功能描述:射频接收器 300-440MHz Receiver, 1.2kbps, 1.7mA With Shutdown( Lead Free) RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel |
| MICRF008 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:QwikRadio Sweep-Mode Receiver |
| MICRF008_11 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:QwikRadio Sweep-Mode Receiver |
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