MICRF007 データシートの表示（PDF） - Micrel

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MICRF007

QwikRadio® Low-Power UHF Receiver

Micrel 

MICRF007

Micrel

Symbol

Parameter

Condition

Min Typ Max Units

IOH

IOL

VOH

VOL

tR, tF

Output High Current

Output Low Current

Output High Voltage

Output Low Voltage

Output Rise and Fall Times

DO, IOUT = –1µA

DO, IOUT = +1µA

DO, CLOAD = 15pF

20.8

µA

17.6

µA

0.9VDD

V

0.1VDD V

10

µs

Notes:

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

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

3. Devices are E�

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

4. Specification for packaged product only.

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 (Manchester encoded data) at a data rate of 600bps. The RF input is assumed to

be matched into 50Ω.

6. Sensitivity, a commonly specified receiver parameter, provides an indication of the receiver’s input referred noise, generally input thermal noise.

However, it is possibl�

noise is appreciab�

A better indicator of achievable receiver range performance is usually given by its selectivity, often stated as intermediate frequency (IF) or radio

frequency (RF) bandwidth, depending on receiver topology. Selectivity is a measure of the rejection by the receiver of ambient noise. More selective

receivers will almost inva�

-

ally thermal will the receiver demonstrate sensitivity-limited performance.

7. Parameter scales linearly with reference oscillator frequency fT. For any reference oscillator frequency other than 6.7458MHz, compute the param-

eter value as the ratio:

fTMHz × (parameter value at 6.7458MHz)

6.7458

Example: For reference oscillator freqency fT = 6.00MHz:

(parameter value at 6.00MHz)= 6.7458 × (parameter value at 6.7458MHz)

6.00

8. Spurious reve�

-

ing network.

9. Series resistance �

resistance is too great, the oscillator may oscillate at a diminished peak-to-peak level, or may fail to oscillate entirely. Micrel recommends that series

resistances for ceramic resonators and crystals not exceed 50Ω and 100Ω respectively. Refer to “Application Hint 35” for crystal recommendations.

10. Parameter scales inversely with reference oscillator frequency fT. For any reference oscillator frequency other than 6.7458MHz, compute the

parameter value as the ratio:

6.7458 × (parameter value at 6.7458MHz)

fTMHZ

Example: For reference oscillator frequency fT = 6.00MHz:

(parameter value at 6.00MHz) = 6.7458 × (parameter value at 6.7458MHz)

6.00

M9999-021705

4

February 17, 2005

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