MICRF112 datasheet(4/20 Pages) MICREL

4 / 20 page

Micrel, Inc.

MICRF112

December 2011

M9999-120911

(408) 944-0800

Absolute Maximum Ratings (Note 1)

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°C to + 150°C

Lead Temperature (soldering, 10 seconds) ............ + 300°C

ESD Rating.................................................................Note 3

Operating Ratings (Note 2)

Supply Voltage VDD ........................................ 1.8V to 3.6V

Ambient Operating Temperature (TA) ...... –40°C to +125°C

Programmable Transmitter Frequency Range:

....................................................... 300MHz to 450MHz

Electrical Characteristics(Note 4)

Speciﬁcations apply for VDD = 3.0V, TA = 25°C, FreqREFOSC = 13.560MHz, EN = VDD. Bold values indicate –40°C to 125°C unless

otherwise noted. 1kbps data rate 50% duty cycle. RL 50ohm load (matched)

Parameter

Condition

Min

Typ

Max

Units

Power Supply

Standby supply current, Iq

EN = VSS

.05

1µA

µA

@ 315MHz, POUT = +10dBm

11.2

Mark Supply Current ION

@ 433.92MHz, POUT = +10dBm

11.2

@ 315MHz

2.7

SPACE supply current, IOFF

@ 433.92 MHz

2.7

RF Output Section and Modulation Limits:

@315MHz,

Note 4

10.5

dBm

Output power level, POUT

FSK or ASK "mark"

@433.92MHz,

Note 4

10.5

dBm

@ 630MHz,

Note 4 2nd harm.

-39

dBc

Harmonics output for 315

MHz

@945MHz,

Note 4 3rd harm.

-53

dBc

@ 867.84MHz,

Note 4 2nd harm.

-55

dBc

Harmonics output for

433.92 MHz

@1301.76MHz,

Note 4 3rd harm.

-55

dBc

Extinction ratio for ASK

dBc

FSK Modulation

Frequency Deviation

load capacitor = 10pF, crystal type = HC49/U

kHz

Data Rate

kbps

ASK Modulation

Data Rate

kbps

@315MHz, Note 6

<700

kHz

Occupied Bandwidth

@433.92MHz, Note 6

<1000

kHz

VCO Section

@ 100kHz from Carrier

-76

dBc/Hz

315 MHz Single Side Band

Phase Noise

@ 1000kHz from Carrier

-79

dBc/Hz

@ 100kHz from Carrier

-72

dBc/Hz

433.92 MHz Single Side

Band Phase Noise

@ 1000kHz from Carrier

-81

dBc/Hz

Reference Oscillator Section

XTLIN, XTLOUT, XTLMOD

Pin capacitance

External Capacitance

See Schematic C17 & C18

Oscillator Startup Time

Note 5

Crystal: HC49S

300

µs

Digital / Control Section

Output Blanking

STDBY transition from LOW to HIGH

500

µs

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