MICRF002YM Datasheet MICRF002YM, MICRF022YM-FS12, MICRF022YM-FS48-TR | P1-P3

MICRF002/RF022

300-440MHz QwikRadio

ASK Receiver

QwikRadio is a registered trademark of Micrel, Inc. The QwikRadio ICs were developed under a partnership agreement with AIT of Orlando, FL.

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

408

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

July 2008

M9999-070808

General Description

The MICRF002 is a single chip ASK/OOK (ON-OFF

Keyed) RF receiver IC. This device is a true “antenna-in to

data-out” monolithic device. All RF and IF tuning is

accomplished automatically within the IC which eliminates

manual tuning and reduces production costs. The result is

a highly reliable yet low cost solution.

The MICRF002 is a fully featured part in 16-pin packaging,

the MICRF022 is the same part packaged in 8-pin

packaging with a reduced feature set (see “Ordering

Information” for more information).

The MICRF002 is an enhanced version of the MICRF001

and MICRF011. The MICRF002 provides two additional

functions over the MICRF001/011, (1) a Shutdown pin,

which may be used to turn the device off for duty-cycled

operation, and (2) a “Wake-up” output, which provides an

output flag indicating when an RF signal is present. These

features make the MICRF002 ideal for low and ultra-low

power applications, such as RKE and remote controls.

All IF filtering and post-detection (demodulator) data

filtering is provided within the MICRF002, so no external

filters are necessary. One of four demodulator filter

bandwidths may be selected externally by the user.

The MICRF002 offer two modes of operation; fixed-mode

(FIX) and sweep-mode (SWP). In fixed-mode the

MICRF002 functions as a conventional superhet receiver.

In sweep-mode the MICRF002 employs a patented

sweeping function to sweep a wider RF spectrum. Fixed-

mode provides better selectivity and sensitivity

performance and sweep-mode enables the MICRF002 to

be used with low cost, imprecise transmitters.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

QwikRadio

Features

• 300MHz to 440MHz frequency range

• Data-rate up to 10kbps (fixed-mode)

• Low Power Consumption

• 2.2mA fully operational (315MHz)

• 0.9µA in shutdown

• 220µA in polled operation (10:1 duty-cycle)

• Wake-up output flag to enable decoders and

microprocessors

• Very low RF re-radiation at the antenna

• Highly integrated with extremely low external part count

Applications

• Automotive remote keyless entry (RKE)

• Remote controls

• Remote fan and light control

• Garage door and gate openers

_________________________________________________________________________________________________________

Ordering Information

Part Number

Demodulator

Bandwidth

Operating Mode Shutdown

WAKEB

Output Flag

Package Lead Finish

MICRF002YM User Programmable Fixed or Sweep Yes Yes 16-Pin SOIC Pb-Free

MICRF022YM-SW48 5000Hz Sweep No Yes 8-Pin SOIC Pb-Free

MICRF022YM-FS12 1250Hz Fixed Yes No 8-Pin SOIC Pb-Free

MICRF022YM-FS24 2500Hz Fixed Yes No 8-Pin SOIC Pb-Free

MICRF022YM-FS48 5000Hz Fixed Yes No 8-Pin SOIC Pb-Free

Micrel, Inc. MICRF002/RF022

July 2008

M9999-070808

Typical Application

SEL0SEL0 SWEN

VSSRF REFOSC

VSSRF SEL1

ANT CAGC

VDDRF

WAKEB

VDDBB

SHUT

CTH DO

NC VSSBB

0.047µF

4.8970MHz

Data

Output

MICRF002

4.7µF

+5V

15nH

10pF

68nH

1/4 Wave Monopole

315MHz 800bps On-Off Keyed Receiver

Pin Configuration

1SEL0

VSSRF

ANT

VDDRF

VDDBB

CTH

16 SWEN

REFOSC

SEL1

CAGC

WAKEB

SHUT

VSSBB

1VSSRF

ANT

VDDRF

CTH

8 REFOSC

CAGC

SHUT/WAKEB

16-Pin SOIC (M) 8-Pin SOIC (M)

8-Pin Options

The standard 16-pin package allows complete control of

all configurable features. Some reduced function 8-pin

versions are also available, see “Ordering Information”

on page 1.

For high-volume applications additional customized 8-pin

devices can be produced. SWEN, SEL0 and SEL1 pins

are internally bonded to reduce the pin count; pin 6 may

be configured as either SHUT or WAKEB

Demodulator Bandwidth

SEL0 SEL1

Sweep-Mode Fixed-Mode

1 1 5000Hz 10000Hz

0 1 2500Hz 5000Hz

1 0 1250Hz 2500Hz

0 0 625Hz 1250Hz

Table 1. Nominal Demodulator Filter Bandwidth vs.

SEL0, SEL1 and Operating Mode

Micrel, Inc. MICRF002/RF022

July 2008

M9999-070808

Pin Description

Pin Number

SOIC-16

Pin Number

SOIC-8

Pin Name Pin Name

1 – SEL0

Bandwidth Selection Bit 0 (Digital Input): Used in conjunction with SEL1 to set

the desired demodulator filter bandwidth. See Table 1. Internally pulled-up to

VDDRF.

2, 3 1 VSSRF RF Power Supply: Ground return to the RF section power supply.

4 2 ANT

Antenna (Analog Input): For optimal performance the ANT pin should be

impedance matched to the antenna. See “Applications Information” for

information on input impedance and matching techniques.

5 3 VDDRF RF Power Supply: Positive supply input for the RF section of the IC.

6 – VDDBB

Base-Band Power Supply: Positive supply input for the baseband section

(digital section) of the IC.

7 4 CTH

Data Slicing Threshold Capacitor (Analog I/O): Capacitor connected to this

pin extracts the dc average value from the demodulated waveform which

becomes the reference for the internal data slicing comparator.

8 – NC Not internally connected

9 – VSSBB

Base-Band Power Supply: Ground return to the baseband section power

supply.

10 5 DO Data Output (Digital Output)

11 6 SHUT

Shutdown (Digital Input): Shutdown-mode logic-level control input. Pull low to

enable the receiver. Internally pulled-up to VDDRF.

12 – WAKEB

Wakeup (Digital Output): Active-low output that indicates detection of an

incoming RF signal.

13 7 CAGC

Automatic Gain Control (Analog I/O): Connect an external capacitor to set the

attack/decay rate of the on-chip automatic gain control.

14 – SEL1

Bandwidth Selection Bit 1 (Digital Input): Used in conjunction with SEL0 to set

the desired demodulator filter bandwidth. See Table 1. Internally pulled-up to

VDDRF.

15 8 REFOSC Reference Oscillator: Timing reference, sets the RF receive frequency.

16 – SWEN

Sweep-Mode Enable (Digital Input): Sweep- or Fixed-mode operation control

input. SWEN high= sweep mode; SWEN low = conventional superheterodyne

receiver. Internally pulled-up to VDDRF.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P17

MICRF002YM

Mfr. #:

Buy MICRF002YM

Manufacturer:

Microchip Technology / Micrel

Description:

RF Receiver (Not Recommended for New Designs)300-440MHz RF Receiver With Shutdown

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

MICRF002YM

MICRF002YM

Products related to this Datasheet