MICRF219 데이터 시트보기 (PDF) - Micrel

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MICRF219

300MHz to 450MHz ASK Receiver with RSSI, Auto-Poll, Bit-Check and Squelch

Micrel 

Micrel

MICRF219

Electrical Characteristics (Continued)

Specifications apply for VDD = 3.3V, GND = 0V, CAGC = 4.7µF, CTH = 0.1µF, fRX = 433.92 MHz unless otherwise noted. Bold values

indicate –40°C – TA – 105°C. 1kbps data rate (Manchester encoded), reference oscillator frequency = 13.52127MHz.

Parameter

Condition

Min.

Typ.

Max. Units

Reference Oscillator Input Range

Reference Oscillator Source

Current

V(REFOSC) = 0V

0.2

1.5

VP-P

300

µA

Demodulator

CTH Source Impedance

CTH Leakage Current

FREFOSC = 9.81563 MHz

FREFOSC = 13.52127MHz

TA = 25ºC

TA = +105ºC

165

kΩ

120

±2

±800

nA

Demodulator Filter Bandwidth

@ 315MHz

Programmable, see application section

1170

9400

Hz

Demodulator Filter Bandwidth

@ 434MHz

Programmable, see application section

1625

13000 Hz

Digital / Control Functions

DO Pin Output Current

Output Rise And Fall Times

As output source @ 0.8 VDD

sink @ 0.2 VDD

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

260

600

µA

2

µsec

Input High Voltage

Pins SCLK, DO (As input), SHDN,SEL0,

SEL1,SQ

0.8VDD

V

Input Low Voltage

Pins SCLK, DO (As input), SHDN, SEL0,

SEL1,SQ

0.2VDD

V

Output Voltage High

DO

Output Voltage Low

DO

RSSI

0.8VDD

V

0.2VDD

V

RSSI DC Output Voltage Range

−100dBm

−40dBm

0.4

V

2.0

RSSI Response Slope

−110dBm to -40dBm

25

mV/dB

RSSI Output Current

400

µA

RSSI Output Impedance

250

Ω

RSSI Response Time

50% data duty cycle, input power to Antenna = -

20dBm

0.3

sec

Notes:

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

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

3. Device is ESD sensitive. Use appropriate ESD precautions. 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.

5. When data burst does not contain preamble, duty cycle is 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.)

June 2011

4

M9999-060811

(408) 944-0800

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