MICRF008BM TR Micrel Inc, MICRF008BM TR Datasheet

MICRF008BM TR

Manufacturer Part Number

MICRF008BM TR

Description

Manufacturer

Micrel Inc

Datasheet

1.MICRF008BM_TR.pdf (13 pages)

Specifications of MICRF008BM TR

Operating Band Frequency

300 to 440MHz

Operating Temperature (min)

-40C

Operating Temperature (max)

85C

Operating Temperature Classification

Industrial

Product Depth (mm)

3.94mm

Product Height (mm)

1.48mm

Operating Supply Voltage (min)

4.75V

Operating Supply Voltage (typ)

Operating Supply Voltage (max)

5.5V

Lead Free Status / Rohs Status

Not Compliant

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General Description

The MICRF008 QwikRadio

OOK (on-off keyed) receiver IC designed for remote

wireless applications. This device is a true single-chip,

“antenna-in, data-out” device, and it is easy to implement.

MICRF008 receiver requires very few peripheral passive

components. All tunings, RF and IF, are accomplished

within the IC. Ease of use and minimal parts count

translate to cost savings and shorter time to market.

MICRF008 receiver offers a robust and low-cost solution

for high volume wireless applications.

The MICRF008 sweeps the internal local oscillator at rates

greater than the baseband data rate. This effectively

broadens the RF bandwidth of the receiver to a value

equivalent to conventional superregenerative receivers.

This allows the MICRF008 to operate with less expensive

LC transmitters without additional components or tuning,

even though the receiver topology is still superheterodyne.

In this mode the reference crystal can be replaced with a

less expensive ±0.5% ceramic resonator.

Since all post-detection (demodulator) data filtering is

provided on the MICRF008, no external IF filters are

required. One of the two internal filter bandwidths must be

externally selected based on data rate and code

modulation format.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

_________________________________________________________________________________________________________

Typical Application

QwikRadio is a registered trademark of Micrel, Inc.

August 2008

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

1.8pF

33nH

ANT1

1/8 Monopole

80mm

UHF receiver is a single-chip

0.1µF

+5V

2.2µF

433.92MHz Receiver

SEL0

ANT

VDD

CTH

MICRF008YM

Features

Complete UHF receiver on a monolithic chip

300MHz to 440MHz frequency range

Up to 4.8kbps data rate.

Automatic tuning, no manual adjustment

Very low RF antenna reradiation

CMOS logic interface for standard ICs

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

408

REFOSC

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

CAGC

VSS

QwikRadio

MICRF008

4.7µF

Sweep-Mode Receiver

3.36MHz

M9999-080108

Related parts for MICRF008BM TR

MICRF008BM TR Summary of contents

Page 1

... C1 1.8pF L1 33nH QwikRadio is a registered trademark of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( August 2008 Features Complete UHF receiver on a monolithic chip 300MHz to 440MHz frequency range Up to 4.8kbps data rate. Automatic tuning, no manual adjustment ...

Page 2

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 ...

Page 3

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 ...

Page 4

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, ...

Page 5

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 ...

Page 6

Micrel, Inc. Functional Diagram RF ANT Amp VCC VSS SEL0 REFOSC Ceramic Resonator 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, ...

Page 7

Micrel, Inc. proportional to REFOSC frequency. The nominal value of RSC given in the “Electrical Characteristics ” Table is 220kΩ for a REFOSC frequency of 3.36MHz. Slicing level time constant value vary depending on data pattern, data rate and data ...

Page 8

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 ...

Page 9

Micrel, Inc. Test Circuit ANT1 Z = ± Test Circuit and Application Information The test circuit is based on the EVAL8 PCB Design. Gerbers, the bill of material and complete schematic are available at Micrel website: (http://www.micrel.com/product-info/qwikradio.shtml). ...

Page 10

Micrel, Inc. Input Connector/Antenna Starting at J2, a SMA connector to connect signal generator. Levels above –20dBm should be avoided. An antenna pad is also provided. Solder a piece of solid wire for the frequency of interest. ...

Page 11

Micrel, Inc. C Capacitor TH In order to calculate the right value for the C the data format needs to have a preamble that resembles the data pattern, that is it has the same period and duty cycle. (See “Application ...

Page 12

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 ...

Page 13

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. ...

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