MICRF221 查看數據表（PDF） - Micrel

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MICRF221

3.3V, QwikRadio® 850 MHz to 950 MHz Receiver

Micrel 

Micrel Inc.

Electrical Characteristics (continued)

Reference Oscillator

Symbol Parameter

Condition

Reference Oscillator

Frequency

fRX = 868 MHz

fRX = 915 MHz

Reference Oscillator

Input Impedance

Time to Data

RO1 Pin

From Shut Down

Reference Oscillator

Input Range

Reference Oscillator

Source Current

With External Drive

RO1 Pin, V(REFOSC) = 0V

Autopolling Operation(7)

Symbol Parameter

Isleep(8)

Tsleep Programming

Range

SLEEP Current

Condition

2msec on, 1.3 sec Off

Demodulator

Symbol Parameter

CTH Source Impedance

CTH Leakage Current

Demodulator Filter

Bandwidth @ 915MHz

Condition

Frefosc = 14.27643MHz

TA = 25ºC

TA = +105ºC

Programmable, see application section

Digital / Control Functions

Symbol Parameter

Condition

Input High Voltage

Pins SCLK, DO (As input), SHDN

Input Low Voltage

Pins SCLK, DO (As input), SHDN

Output Voltage High

DO

Output Voltage Low

DO

DO pin output current

As output, source @ 0.8 VDD

As output, sink @ 0.2 VDD

Output rise and fall times CI = 15 pF, pin DO, 10-90%

MICRF221

Min

Typ

Max Units

13.54856

14.27643

MHz

1500

kΩ

1

msec

0.5

1.5 Vp-p

380

µA

Min

Typ

Max Units

10

1300 msec

15

µA

Min

1712

Typ

100

+/-2

+/-800

Max Units

kΩ

nA

13000 Hz

Min

Typ

Max Units

0.8Vdd

V

0.2Vdd V

0.8Vdd

V

0.2Vdd V

260

µA

600

2

µsec

October 2008

4

M9999-100108

(408) 955-1690

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