MICRF008 datasheet(3/12 Pages) MICREL

3 / 12 page

July 2003

MICRF008

Micrel

Electrical Characteristics (Note 4)

+4.75V

≤ V

DD ≤ 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 ≤ T

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

Symbol

Parameter

Condition

Min

Typ

Max

Units

Operating Current

continuous 315MHz operation

continuous 433.92MHz operation

reference oscillator powered down

2.5

RF Section, IF Section

Receiver Sensitivity

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

–90

–95

dBm

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

–90

–95

dBm

IF Center Frequency

Note 7

2.0

MHz

IF Bandwidth

315MHz; Note 6, 7

0.8

MHz

433.92MHz; Note 6, 7

1.1

MHz

Maximum Receiver Input

SC = 50Ω

–20

dBm

Spurious Reverse Isolation

ANT pin, R

SC = 50Ω, Note 8

µVrms

AGC Attack to Decay Ratio

ATTACK ÷ tDECAY

0.1

Reference Oscillator

µA

Source Current

REFOSC

Reference Oscillator

Note 9

200

Ω

Input Impedance

Demodulator

CTH

TH Source Impedance

SEL0 = VDD, See Table 1, Note 10

220

Ω

∆Z

CTH

Maximum C

TH Source Impedance

±15

Variation

Digital/Control Section

IN(pu)

Input Pull-Up Impedance

SEL0

1.0

Ω

OUT

Output Current

DO pin, push-pull

µA

OUT(high)

Output High Voltage

DO pin, I

OUT = 1µA

0.8V

OUT(low)

Output Low Voltage

DO pin, I

OUT = 1µA

0.2V

R, tF

Output Rise and Fall Times

DO pin, C

LOAD = 15pF

µs

Note 1.

Exceeding the absolute maximum rating may damage the device.

Note 2.

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

Note 3.

Devices are ESD sensitive. Use appropriate ESD precautions. Meets Class 1 ESD test requirements, (human body model, HBM), in accor-

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

Note 4.

Specification for packaged product only.

Note 5.

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

defined as a return-to-zero (RZ) waveform with 50% average duty cycle at a data rate of 1kbps (Manchester encoded). The RF input is

assumed to be matched into 50

Ω.

Absolute Maximum Ratings (Note 1)

Supply Voltage (V

DDRF, VDDBB) .................................... +7V

Reference Oscillator Input Voltage (V

REFOSC) .......... VDDBB

Input/Output Voltage (V

I/O) ................. VSS–0.3 to VDD+0.3

Junction Temperature (T

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

Storage Temperature Range (T

S) ............ –65°C to +150°C

Lead Temperature (soldering, 10 sec.) ................... +260

°C

ESD Rating, Note 3

Operating Ratings (Note 2)

Supply Voltage (V

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

Ambient Temperature (T

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

RF Operating Range ........................... 300MHz to 440MHz

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

Reference Oscillator Input Range ............ 0.2V

PP to 1.5VPP

Demod Bandwidth .......................................... 0.1 to 4.8kHz

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