MICRF218(2007) データシートの表示（PDF） - Micrel

部品番号

コンポーネント説明

メーカー

MICRF218
(Rev.:2007)

3.3V, QwikRadio® 300 MHz to 450 MHz Receiver

Micrel 

Micrel

MICRF218

Symbol Parameter

Digital / Control Functions

Input High Voltage

Input Low Voltage

DO pin output current

RSSI

Output rise and fall

times

RSSI DC Output

Voltage Range

RSSI response slope

RSSI Output Current

RSSI Output

Impedance

RSSI Response Time

Condition

Pins DO (As input), SHDN

Pins DO (As input), SHDN

Source @ 0.8 Vdd

Sink @ 0.2 Vdd

CI = 15 pF, pin DO, 10-90%

-90 dBm to -40 dBm

50% data duty cycle, input power to

Antenna = -20 dBm

Min Typ Max Units

0.8VDD

V

0.2VDD

V

260

µA

600

2

µsec

0.22

to 2

V

35

mV/

dBm

±1.5

mA

200

Ω

0.3

Sec

Notes:

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

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

3. Device are ESD sensitive. Use appropriate ESD precaution. Exceeding the absolute maximum rating may damage the device.

4. 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 (Manchester encoded) at a data rate of 1kBPS. Conductive

measurement is performed using 50 ohm test circuit .

5. Spurious reverse isolation represents the spurious component that appear on the RF input pin (ANT) measured into 50 Ohms with an input RF

matching network.

6. When data burst does not contain preamble, the duty cycle is then defined as total duty cycle, including any “quiet” time between data bursts.

When data bursts contain preamble sufficient to charge the slice level on capacitor Cth, then duty cycle is the effective duty cycle of the burst

alone. [For example, 100msec burst with 50% duty cycle, and 100msec “quiet” time between bursts. If burst includes preamble, duty cycle is

TON/(TON + tOFF) = 50%; without preamble, duty cycle is TON/(TON + TOFF + TQUIET) = 50msec/(200msec) = 25%. TON is the (Average number of

1’s/burst) × bit time, and TOFF = TBURST – TON.)

7. Parameter scales linearly with reference oscillator frequency fT. For any reference oscillator frequency other than one of the tabulated

frequencies (called FTAB), compute new parameter value as the ratio:

Parameter at fREFOSCMHz = ( fREFOSCMHz /FTAB ) × ( parameter at FTABMHz )

8. Parameter scales inversely with reference oscillator frequency fT. For any reference oscillator frequency other than one of the tabulated

frequencies (called FTAB), compute new parameter value as the ratio:

Parameter at fREFOSCMHz = ( FTAB / fREFOSCMHz ) × ( parameter at FTABMHz )

September 2007

6

M9999-090607

(408) 944-0800

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