参数资料
型号: MICRF010BM
厂商: Micrel Inc
文件页数: 10/14页
文件大小: 0K
描述: IC RCVR UHF 300-440MHZ 8-SOIC
标准包装: 95
频率: 300MHz ~ 440MHz
灵敏度: -104dBm
数据传输率 - 最大: 2 kbps
调制或协议: ASK,OOK
应用: RKE
电流 - 接收: 2.9mA
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
Micrel
DO Pin
The output stage for the digital output (DO) is shown in
Figure 4. The output is a 45μA push and 45μA pull
switched-current stage. This output stage is capable of
SHUT Pin
VDD
MICRF010
driving
CMOS
loads.
An external buffer-driver
is
recommended for driving high capacitance loads.
Q1
Q2
Compa-
rator
VDD
45 u A
VSS
SHUT
Q3
to Interna
Circuits
DO
45 u A
VSS
Figure 4. DO Pin
REFOSC Pin
The REFOSC input circuit is shown in Figure 5. Input
impedance is quite high (290k ? ). This is a Colpitts
oscillator, with internal 10pF capacitors.
VSS
Figure 6. SHUT Pin
Control input circuitry is shown in Figure 6. The standard
input is a logic inverter constructed with minimum geometry
MOSFETs (Q2, Q3). P-Channel MOSFET Q1 is a large
channel length device, which functions essentially as a
“weak” pull-up to VDDBB. Typical pull-up current is 5μA,
leading to an impedance to the VDD supply of typically
1M ? .
Externally
applied
signals
should
be AC-coupled,
amplitude limited to approximately 0.5V PP . The nominal
DC bias voltage on this pin is 1.4V
Active
Bias
VDD
REFOSC
10pF
10pF
VSS
200k
250
30uA
VSS
Figure 5. REFOSC Pin
June 2005
10
M9999-063005
(408) 955-1690
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