Micrel

MICRF218

November 2011

5

M9999-111111

(408) 944-0800

Symbol

Parameter

Condition

Min

Typ

Max

Units

Digital / Control Functions

Input High Voltage

Pins DO (As input), SHDN

V

Input Low Voltage

Pins DO (As input), SHDN

V

Source @ 0.8 Vdd

260

DO pin output current

Sink @ 0.2 Vdd

600

µA

Output rise and fall

times

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

2

µsec

RSSI

RSSI DC Output

Voltage Range

0.22

to 2

V

RSSI response slope

-90 dBm to -40 dBm

35

mV/

dBm

RSSI Output Current

±1.5

mA

RSSI Output

Impedance

200

Ω

RSSI Response Time

50% data duty cycle, input power to

Antenna = -20 dBm

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

7.

8.

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