MICRF008YM Micrel Inc, MICRF008YM Datasheet
MICRF008YM
Specifications of MICRF008YM
MICRF008YM
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MICRF008YM Summary of contents
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... Low external part count Replaces superregenerative receivers design Manufacturability and same performance over the years Very small PCB area required Applications Garage door and gate openers Security systems Remote appliances control Toys Fan and light control U1 MICRF008YM 1 REFOSC SEL0 2 ANT CAGC +5V 3 VDD 4 ...
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... Micrel, Inc. Ordering Information Part Number Junction Temperature Range MICRF008YM Pin Configuration Pin Description Pin Number Pin Name SOIC-8 1 SEL0 2 ANT 3 VDD 4 CTH VSS 7 CAGC 8 REFOSC August 2008 Package –40°C to +85°C 8-Pin SOIC SEL0 1 ANT 2 VDD 3 CTH 4 8-Pin SOIC (M) Pin Name Bandwidth Selection Bit 0 (Digital Input): Sets the desired demodulator filter bandwidth ...
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Micrel, Inc. Absolute Maximum Ratings Supply Voltage ( )........................................+7V DDRF DDBB Reference Oscillator Input Voltage (V Input/Output Voltage (V ). ....................V I/O Junction Temperature (T ) ....................................... +150°C J Storage Temperature (T ) ........................... –65°C to 150°C s ...
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Micrel, Inc. Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive, use appropriate ESD precautions. Meets class 1 ESD test requirements, ...
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Micrel, Inc. C source impedance in Table 1 is represented by TH (symbolic) resistor RSC in the MICRF008 Simplified Block Diagram. The Programmable LPF (Low Pass Filter) is also illustrated in the MICRF008 Simplified Block Diagram. Typical Characteristics Supply Current ...
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... Reference and Control Functional Description The entire block diagram illustrates the basic structure of the MICRF008YM made of three sub-blocks, which are the UHF Downconverter, the OOK Demodulator, and the Reference and Control. Also shown in the figure are two capacitors (CTH, and CAGC) and the reference frequency device, usually a ceramic resonator ...
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... RSSI signal, which is useful for several different applications. Reference Oscillator All timing and tuning operations on the MICRF008YM are derived from the internal Colpitts reference oscillator. The reference frequency can be implemented in two ways, by using a resonator device (a ceramic resonator or crystal driving an external signal, which should not exceed 0 ...
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Micrel, Inc. VDDBB Compa- rator VSSBB Figure 4. DO Pin REFOSC Pin The REFOSC input circuit is shown in Figure 5. Input impedance is quite high (200kΩ). This is a Colpitts oscillator, with internal 30pF capacitors. This input is intended ...
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... Micrel website: (http://www.micrel.com/product-info/qwikradio.shtml). EVAL8 provides the means for a complete evaluation of the MICRF008YM not intended as a final receiver design. For final receiver applications, look for the RX8-x series of reference designs. The board is a FR4 material, 0.062 inch thick, in two layers strongly Figure 7a ...
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... One frequently used is to plot impedance values in the Smith Chart. However, one needs to know the antenna impedance and the antenna pin impedance in the MICRF008YM to perform the matching. Table 3 below shows the antenna pin input impedance versus frequency and the matching elements needed to match 50Ω ...
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... It requires a resonator of some kind connected to the REFOSC pin. Either a ceramic resonator or a crystal can be used. A resonator is chosen due to its lower cost and because the MICRF008YM is running in sweep mode, which does not require the precision of a crystal. Resonators found the market normally have a precision of 0 ...
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Micrel, Inc. SEL0 Pin – Setting the Demodulator Bandwidth The SEL0 pin sets the demodulator bandwidth. When the pin is connected to ground the demodulator bandwidth is set to its minimum. When the pin is left floating (internal pull-up) or ...
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Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...