MICRF112YMM Micrel Inc, MICRF112YMM Datasheet

MICRF112YMM

Manufacturer Part Number

MICRF112YMM

Description

IC XMITTER UHF ASK/FSK 10-MSOP

Manufacturer

Micrel Inc

Datasheet

1.MICRF112-433_EV.pdf (20 pages)

Specifications of MICRF112YMM

Frequency

300MHz ~ 450MHz

Applications

RKE

Modulation Or Protocol

ASK, OOK

Data Rate - Maximum

50 kbps

Power - Output

10dBm

Current - Transmitting

12.3mA

Data Interface

PCB, Surface Mount

Antenna Connector

PCB, Surface Mount

Voltage - Supply

1.8 V ~ 3.6 V

Operating Temperature

-40°C ~ 125°C

Package / Case

10-MSOP, Micro10™, 10-uMAX, 10-uSOP

Transmitting Current

12.5mA

Data Rate

50Kbps

Frequency Range

300MHz To 450MHz

Modulation Type

ASK, FSK

Rf Ic Case Style

MSOP

No. Of Pins

Supply Voltage Range

1.8V To 3.6V

Operating

RoHS Compliant

Output Power

10dBm

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Features

Memory Size

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

576-1963-5
MICRF112YMM

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General Description

The MICRF112 is a high performance, easy to use, single

chip ASK / FSK Transmitter IC for remote wireless

applications in the 300 to 450MHz frequency band. This

transmitter IC is a true “data-in, antenna-out” monolithic

device.

MICRF112 is high performance in three areas:

delivery, operating voltage, and operating temperature. In

terms of power, the MICRF112 is capable of delivering +10

dBm into a 50Ω load. This power level enables a small

form factor transmitter (lossy antenna) such as a key fob

transmitter to operate near the maximum limit of

transmission regulations. In terms of operating voltage,

the MICRF112 operates from 3.6V to 1.8V.

transmitter ICs in the same frequency band stop operating

below 2.0V. The MICRF112 will work with most batteries

to the end of their useful limits.

temperature, the MICRF112 operates from -40°C to

+125°C. This wide operating temperature range makes

MICRF112 an ideal candidate for the demanding

applications such as a tire pressure monitoring system.

The MICRF112 is easy to use.

reference frequency (RF carrier frequency divided by 32

times) generated from a crystal with a few additional

external parts to create a complete versatile transmitter.

The MICRF112 operates with ASK/OOK (Amplitude Shift

Keying/On-Off Keyed) UHF receiver types from wide-band

super-regenerative

performance

MICRF112’s

(Manchester Encoding). It operates with FSK receivers as

well. The chip is designed to support narrow band FSK

(Frequency Shift Modulation) by switching an external

capacitor in parallel with the reference crystal. The

MICRF112’s maximum FSK data rate is 10kbps.

QwikRadio is a registered trademark of Micrel, Inc.

March 2008

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

maximum

super-heterodyne

radios

ASK

data

In terms of operating

narrow-band,

receivers.

One only needs a

rate

50kbps

power

Many

high

The

Features

• Complete UHF transmitter

• Frequency range 300MHz to 450MHz

• Data rates up to 50kbps ASK, 10kbps FSK

• Output Power to 10dBm

• Low external part count

• Low standby current <1µA

• Low voltage operation (down to 1.8V)

• Operate with crystals or ceramic resonators

Applications

• Remote Keyless Entry Systems (RKE)

• Remote Control (STB, HVAC and Appliances)

• Garage Door Opener Transmitters

• Remote Sensor Data Links

• Infrared Transmitter Replacement

• Tire Pressure Monitor System (TPMS)

Ordering Information

MICRF112YMM

QwikRadio

Part Number

UHF ASK/FSK Transmitter

MICRF112

–40°C to +125°C

Temp. Range

(408) 944-0800

M9999-031008

10-Pin MSOP

Package

Related parts for MICRF112YMM

MICRF112YMM Summary of contents

Page 1

... Remote Control (STB, HVAC and Appliances) In terms of operating • Garage Door Opener Transmitters • Remote Sensor Data Links • Infrared Transmitter Replacement • Tire Pressure Monitor System (TPMS) One only needs a Ordering Information MICRF112YMM narrow-band, high receivers. The data rate is ...

Page 2

Micrel, Inc. Typical Application Note: Values in parenthesis are for 315MHz March 2008 Figure 1. MICRF112 ASK Key Fob Design 2 MICRF112 M9999-031008 (408) 944-0800 ...

Page 3

Micrel, Inc. Pin Configuration Pin Description Pin Number Pin Name MSOP-10 1 ASK 2 XLIN 3 XTLOUT 4 VSS 5 XTAL_MOD 6 FSK VSSPA 9 PA_OUT 10 VDD March 2008 ASK 1 XTLIN 2 XTLOUT 3 VSS ...

Page 4

Micrel, Inc. Absolute Maximum Ratings Supply Voltage VDD ...................................................+5.0V Voltage on PAOUT......................................................+7.2V Voltage on I/O Pins ............................ VSS–0.3 to VDD+0.3 Storage Temperature Range ....................-65° 150°C Lead Temperature (soldering, 10 seconds) ............ + 300°C ESD Rating.................................................................Note 3 Electrical Characteristics ...

Page 5

Micrel, Inc. Electrical Characteristics (cont.) Parameter Condition High (V Digital Input (EN, ASK and FSK) Low (V Digital Input Leakage High (V Current Low (V (EN, ASK and FSK Pins) Under Voltage Lock Out (UVLO) Note 1. Exceeding the absolute ...

Page 6

Micrel, Inc. Test Circuit Note 1. Values without parenthesis are for 433.92 MHz and values in parenthesis are for 315MHz Note 100pF for external REF-OSC Note 3. For FSK R1 = 0Ω NP ...

Page 7

Micrel, Inc. Assembly Drawing MICRF112 50 Ohm Test Board Bottom Layer MICRF112 50 Ohm Test Board March 2008 Top Layer MICRF112 50 Ohm Test Board 7 MICRF112 M9999-031008 (408) 944-0800 ...

Page 8

Micrel, Inc. Typical Characteristics Using MICRF112, 50Ω test Board 315MHz OBW, ASK = 1kHz CW Max Power @ 3V, 315MHz, ASK = 1kHz, Note Spectrum 3 Fundamental at 315 MHz Note 1. 1.2dB cable loss. March 2008 ...

Page 9

Micrel, Inc. 315MHz, Zero Span , ASK = 1kHz 315MHz, Phase Noise, ASK = 1kHz, 100kHz Offset, –75.59dBc/Hz 315MHz, Phase Noise, ASK = CW, 100kHz Offset, –74.39dBc/Hz March 2008 315MHz, Zero Span, ASK = 50kHz 315MHz, Phase Noise, ASK = ...

Page 10

Micrel, Inc. 433.92MHz OBW, ASK = 1kHz 433.92MHz, CW Max Power @ 3V, ASK = 1kHz, Note Spectrum 3 Fundamental at 433.92 MHz Note 1. 1.3dB cable loss. March 2008 Harmonic; 10 433.92MHz OBW, ASK = 50kHz ...

Page 11

Micrel, Inc. 433.92MHz Zero Span, 1kHz 433.92MHz Phase Noise, ASK = CW, 100kHz Offset, –81.04dBc/Hz 433.92MHz Phase Noise, ASK = 1kHz, 100kHz Offset, –71.73dBc/Hz March 2008 433.92ASK Zero Span at 50kHz 433.92MHz Phase Noise, ASK = CW, 1MHz Offset, –78.76dBc/Hz ...

Page 12

Micrel, Inc. Functional Diagram Figure 3. Functional Block Diagram MICRF112 10 Pin ASK / FSK Version Functional Description Figure 3 shows a functional block diagram of the MICRF112 transmitter. The MICRF112 can be best described as a phase locked transmitter. ...

Page 13

Micrel, Inc. Crystal Oscillator for FSK Operation Figure 5 shows reference oscillator circuit conﬁguration for FSK operation. To operate the MICRF112 in FSK mode, one additional capacitor is needed between XTALOUT pin and XTALMOD pin. Crystal parameters for FSK operation ...

Page 14

Micrel, Inc. Application Information Note: Values in parenthesis are for 315MHz The MICRF112 is well suited to drive a 50 ohms source, monopole or a loop antenna. Figure example of a loop antenna configuration. Figure 6 also ...

Page 15

Micrel, Inc. Output Matching Network Part of the function of the output network is to attenuate the second and third harmonics. When matching to a transmit frequency, care must be taken not only to optimize for maximum output power but ...

Page 16

Micrel, Inc. PCB Board Assembly Drawing MICRF112 Demo Board Bottom Layer MICRF112 Demo Board March 2008 Figure 7. Demo Board PCB 16 MICRF112 Top Layer MICRF112 Demo Board M9999-031008 (408) 944-0800 ...

Page 17

Micrel, Inc. Note: Configuration is for ASK operation. Values in parenthesis are for 315MHz March 2008 Figure 8. TX112-1 Demo Board Schematic 17 MICRF112 M9999-031008 (408) 944-0800 ...

Page 18

... CON3 680nH 0805 82nH 0603 ANTENNA 100kΩ 0603 0Ω 0603 MICRF112YMM10 13.560MHZ XTAL Table 2 18 MICRF112 Mfg P/N Manufacturer GRM21BR60J106KE01L muRata GRM1885C1H101JA01D muRata GRM1885C1H100JA01D muRata GRM1885C1H4R7JA01D muRata GRM188F51H104ZA01D muRata GRM1885C1H180JA01D muRata ...

Page 19

... CON3 470nH 0805 150nH 0603 ANTENNA 100kΩ 0603 0Ω 0603 MICRF112YMM10 9.84375MHZ XTAL Table JPR1 100kΩ 0Ω NP 0Ω 100kΩ NP Table 4: ASK and FSK Settings R3 0Ω NP Table 5: Enable Control (Shutdown) ...

Page 20

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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