MICRF008 datasheet(3/13 Pages) MICREL

3 / 13 page

Micrel, Inc.

MICRF008

August 2008

M9999-080108

Absolute Maximum Ratings(1)

Supply Voltage (VDDRF, VDDBB)........................................+7V

Reference Oscillator Input Voltage (VREFOSC).............. VDDBB

Input/Output Voltage (VI/O). ....................VSS–0.3 to VDD+0.3

Junction Temperature (TJ) ....................................... +150°C

Storage Temperature (Ts) ........................... –65°C to 150°C

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

ESD Rating

(3)

Operating Ratings(2)

Supply Voltage (VDD).................................. +4.75V to +5.5V

Ambient Temperature (TA) .......................... –40°C to +85°C

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

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

Reference Oscillator Input Range.............. 0.2VPP to 1.5VPP

Demon Bandwidth........................................... 0.1 to 4.8kHz

Electrical Characteristics(4)

+4.75V ≤ VDD ≤ 5.5V, VSS = 0V; CAGC = 4.7μF, CTH = 2.2μF no preamble for data; fREFOSC = 3.36MHz. TA = 25°C, bold

values indicate –40°C ≤ TA ≤ +85°C; current flow into device pins is positive; unless noted.

Symbol

Parameter

Condition

Min

Typ

Max

Units

Continuous 315MHz operation

continuous 433.92MHz operation

IOP

Operating Current

reference oscillator powered down

2.5

RF Section, IF Section

315MHz, SEL0 = 0V; Notes 5, 6

–90

–95

dBm

Receiver Sensitivity

433.92MHz, SEL0 = 0V; Notes 5, 6

–90

–95

dBm

fIF

IF Center Frequency

Note 7

2.0

MHz

315MHz, Notes 6, 7

0.8

MHz

fBW

IF Bandwidth

433.92MHz, Notes 6, 7

1.1

MHz

Maximum Receiver Input

RSC = 50Ω

–20

dBm

Spurious Reverse Isolation

ANT pin, RSC = 50Ω, Note 8

µVRMS

AGC Attack to Decay Ratio

tATTACK ÷ tDECAY

0.1

Reference Oscillator

Reference Oscillator Source

Current

µA

ZREFOSC

Reference Oscillator Input

Impedance

Note 9

200

kΩ

Demodulator

ZCTH

CTH Source Impedance

VSEL0 = VDD, See Table 1, Note 10

220

kΩ

ΔZCTH

Maximum CTH Source

Impedance Variation

±15

Digital/Control Section

ZIN(pu)

Input Pull-Up Impedance

SEL0

1.0

0.8

MΩ

IOUT

Output Current

DO pin, push-pull

µA

VOUT(high)

Output High Voltage

DO pin, IOUT = 1μA

0.8VDD

VOUT(low)

Output Low Voltage

DO pin, IOUT = 1μA

0.2VDD

tR, tF

Output Rise and Fall Times

DO pin, CLOAD = 15pF

µs

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