MICRF002/RF022

300-440MHz QwikRadio

®

ASK Receiver

General Description

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

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

QwikRadio

®

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

accomplished automatically within the IC which eliminates

Features

manual tuning and reduces production costs. The result is

•

300MHz to 440MHz frequency range

a highly reliable yet low cost solution.

•

Data-rate up to 10kbps (fixed-mode)

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

the MICRF022 is the same part packaged in 8-pin

•

Low Power Consumption

packaging with a reduced feature set (see “Ordering

•

2.2mA fully operational (315MHz)

Information” for more information).

•

0.9µA in shutdown

The MICRF002 is an enhanced version of the MICRF001

•

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

and MICRF011. The MICRF002 provides two additional

•

Wake-up output flag to enable decoders and

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

microprocessors

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

•

Very low RF re-radiation at the antenna

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

output flag indicating when an RF signal is present. These

•

Highly integrated with extremely low external part count

features make the MICRF002 ideal for low and ultra-low

power applications, such as RKE and remote controls.

Applications

All IF filtering and post-detection (demodulator) data

filtering is provided within the MICRF002, so no external

•

Automotive remote keyless entry (RKE)

filters are necessary. One of four demodulator filter

•

Remote controls

bandwidths may be selected externally by the user.

•

Remote fan and light control

The MICRF002 offer two modes of operation; fixed-mode

•

Garage door and gate openers

(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.

_________________________________________________________________________________________________________

Ordering Information

Part Number

MICRF002YM

MICRF022YM-SW48

MICRF022YM-FS12

MICRF022YM-FS24

MICRF022YM-FS48

Demodulator

Bandwidth

User Programmable

5000Hz

1250Hz

2500Hz

5000Hz

Operating Mode

Fixed or Sweep

Sweep

Fixed

Shutdown

Yes

No

Yes

WAKEB

Output Flag

Yes

No

Package

16-Pin SOIC

8-Pin SOIC

Lead Finish

Pb-Free

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

Micrel, Inc.

MICRF002/RF022

Typical Application

1/4 Wave Monopole

MICRF002

10pF

68nH

+5V

SEL0

VSSRF

ANT

VDDRF

VDDBB

CTH

0.047µF

NC

SWEN

REFOSC

SEL1

CAGC

WAKEB 4.7µF

SHUT

DO

VSSBB

4.8970MHz

15nH

Data

Output

315MHz 800bps On-Off Keyed Receiver

Pin Configuration

SEL0 1

VSSRF 2

VSSRF 3

ANT 4

VDDRF 5

VDDBB 6

CTH 7

NC 8

16-Pin SOIC (M)

16 SWEN

15 REFOSC

14 SEL1

13 CAGC

12 WAKEB

11 SHUT

10 DO

9 VSSBB

VSSRF 1

ANT 2

VDDRF 3

CTH 4

8 REFOSC

7 CAGC

6 SHUT/WAKEB

5 DO

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

SEL0

1

0

1

0

SEL1

1

0

Demodulator Bandwidth

Sweep-Mode

5000Hz

2500Hz

1250Hz

625Hz

Fixed-Mode

10000Hz

5000Hz

2500Hz

1250Hz

Table 1. Nominal Demodulator Filter Bandwidth vs.

SEL0, SEL1 and Operating Mode

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MICRF002/RF022

Pin Description

Pin Number

SOIC-16

1

Pin Number

SOIC-8

–

Pin Name

SEL0

Pin Name

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.

RF Power Supply: Ground return to the RF section power supply.

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.

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

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

(digital section) of the IC.

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.

Not internally connected

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

supply.

Data Output (Digital Output)

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

enable the receiver. Internally pulled-up to VDDRF.

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

incoming RF signal.

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

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

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.

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

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.

2, 3

4

1

2

VSSRF

ANT

5

6

7

3

–

4

VDDRF

VDDBB

CTH

8

9

10

11

12

13

14

–

5

6

–

7

–

NC

VSSBB

DO

SHUT

WAKEB

CAGC

SEL1

15

16

8

–

REFOSC

SWEN

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Micrel, Inc.

MICRF002/RF022

Absolute Maximum Ratings

(1)

Supply Voltage (V

DDRF

, V

DDBB

)........................................+7V

Input/Output Voltage (V

I/O

). ....................V

SS

–0.3 to V

DD

+0.3

Junction Temperature (T

J

) ....................................... +150°C

Storage Temperature (T

s

) ........................... –65°C to 150°C

Lead Temperature (soldering, 10 sec.)...................... 260°C

ESD Rating

(3)

Operating Ratings

(2)

Supply Voltage (V

DDRF

, V

DDBB

).................... +4.75V to +5.5V

RF Frequency Range.............................. 300MHz to 440Hz

Data Duty-Cycle ................................................20% to 80%

Reference Oscillator Input Range.............. 0.1V

PP

to 1.5V

PP

Ambient Temperature (T

A

) .......................... –40°C to +85°C

Electrical Characteristics

(4)

V

DDRF

= V

DDBB

= V

DD

where +4.75V

≤

V

DD

≤

5.5V, V

SS

= 0V; C

AGC

= 4.7µF, C

TH

= 100nF; SEL0 = SEL1 = V

SS

; fixed mode

(SWEN = V

SS

); f

REFOSC

= 4.8970MHz (equivalent to f

RF

= 315MHz); data-rate = 1kbps (Manchester encoded). T

A

= 25°C,

bold

values indicate –40°C

≤

T

A

≤

+85°C; current flow into device pins is positive; unless noted.

Symbol

I

OP

Parameter

Operating Current

Condition

continuous operation, f

RF

= 315MHz

polled with 10:1 duty cycle, f

RF

= 315MHz

continuous operation, f

RF

= 433.92MHz

polled with 10:1 duty cycle, f

RF

= 433.92MHz

Min

Typ

2.2

220

3.5

350

0.9

–97

–95

0.86

0.43

–20

30

0.1

±100

290

5.2

Max

3.2

Units

mA

µA

mA

µA

dBm

MHz

dBm

µV

RMS

nA

kΩ

µA

I

STBY

Standby Current

Receiver Sensitivity (

Note 4

)

V

SHUT

= V

DD

f

RF

= 315MHz

f

RF

= 433.92MHz

RF Section, IF Section

f

IF

f

BW

IF Center Frequency

IF Bandwidth

Maximum Receiver Input

Spurious Reverse Isolation

AGC Attack to Decay Ratio

AGC Leakage Current

Note 6

R

SC

= 50Ω

ANT pin, R

SC

= 50Ω,

Note 5

t

ATTACK

÷ t

DECAY

T

A

= +85°C

Reference Oscillator

Z

REFOSC

Reference Oscillator Input

Impedance

Reference Oscillator Source

Current

Note 8

Demodulator

Z

CTH

I

ZCTH(leak)

CTH Source Impedance

CTH Leakage Current

Demodulator Filter Bandwidth

Sweep Mode

(SWEN = VDD or OPEN)

Note 6

Demodulator Filter Bandwidth

Fixed Mode

(SWEN = VSS)

Note 6

Note 7

T

A

= +85°C

V

SEL0

= V

DD

. V

SEL1

= V

DD

V

SEL0

= V

SS

. V

SEL1

= V

DD

V

SEL0

= V

DD

. V

SEL1

= V

SS

V

SEL0

= V

SS

. V

SEL1

= V

SS

V

SEL0

= V

DD

. V

SEL1

= V

DD

V

SEL0

= V

SS

. V

SEL1

= V

DD

V

SEL0

= V

DD

. V

SEL1

= V

SS

V

SEL0

= V

SS

. V

SEL1

= V

SS

145

±100

4000

2000

1000

500

8000

4000

2000

1000

kΩ

nA

Hz

July 2008

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Micrel, Inc.

Symbol

V

IN(high)

V

IN(low)

I

OUT

V

OUT(high)

V

OUT(low)

t

R

, t

F

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

MICRF002/RF022

Parameter

Input-High Voltage

Input-Low Voltage

Output Current

Output High Voltage

Output Low Voltage

Output Rise and Fall Times

Condition

SEL0, SEL1, SWEN

DO, WAKEB pins, push-pull

DO, WAKEB pins, I

OUT

= –1µA

DO, WAKEB pins, I

OUT

= +1µA

DO, WAKEB pins, C

LOAD

= 15pF

Min

Typ

Max

0.8

Units

V

DD

V

DD

µA

V

DD

Digital/Control Section

0.2

10

0.9

0.1

10

V

DD

µs

3. Devices are ESD sensitive, use appropriate ESD precautions. Meets class 1 ESD test requirements, (human body model HBM), in accordance with

MIL-STD-883C, method 3015. Do not operate or store near strong electrostatic fields.

4. Sensitivity is defined as the average signal level measured at the input necessary to achieve 10-2 BER (bit error rate). The RF input is assumed to be

matched to 50Ω.

5. Spurious reverse isolation represents the spurious components which appear on the RF input pin (ANT) measured into 50Ω with an input RF

matching network.

6.

Parameter scales linearly with reference oscillator frequency f

T

.

For any reference oscillator frequency other than 4.8970MHz, compute new

parameter value as the ratio:.

f

MHz

REFOSC

4.8970MHz

×

(parameter value at 4.8970MHz)

7.

Parameter scales inversely with reference oscillator frequency f

T

.

For any reference oscillator frequency other than 4.8970MHz, compute new

parameter value as the ratio:

4.8970MHz

f

REFOSC

MHz

×

(parameter value at 4.8970MHz)

8. Series resistance of the resonator (ceramic resonator or crystal) should be minimized to the extent possible. In cases where the resonator series

resistance is too great, the oscillator may oscillate at a diminished peak-to-peak level, or may fail to oscillate entirely. Micrel recommends that series

resistances for ceramic resonators and crystals not exceed 50Ohms and 100Ω respectively. Refer to Application Hint 35 for crystal

recommendations.

July 2008

5

M9999-070808

参数名称	属性值
厂商名称	Microchip(微芯科技)
包装说明	,
Reach Compliance Code	compli

MICRF002

MICRF002概述

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