MICRF005BM データシートの表示（PDF） - Micrel

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MICRF005BM

115kbps, 800MHz - 1GHz UHF Receiver

Micrel 

MICRF005

Micrel

Symbol

Parameter

Condition

Min Typ Max Units

Digital/Control Section

IIN(pu)

IIN(pd)

VIN(high)

VIN(low)

IOUT

VOUT(high)

VOUT(low)

tR, tF

VSHUT Pull-Up Current

VT/R Pull-Down Current

VT/R, VSHUT, Input-High Voltage

VT/R, VSHUT, Input-Low Voltage

Output Current

Output-High Voltage

Output-Low Voltage

Output Rise and Fall Times

VSHUT = VSS

VT/R = VDD

DO, push-pull

DO, IOUT = –5µA

DO, IOUT = 5µA

DO, CLOAD = 10pF

8.5

µA

12

µA

VDD–0.5

V

0.5

V

90

µA

0.9VDD

V

0.1VDD V

tbd

µs

Note 1.

Note 2.

Note 3.

Note 4:

Note 5:

Note 6:

Note 7:

Note 8:

Note 9:

Exceeding the absolute maximum rating may damage the device.

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

Devices are ESD sensitive. Handling precautions recommended.

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). The RF input is assumed to be matched

into 50Ω.

Spurious reverse isolation represents the spurious components which appear on the RF input pin (ANT) measured into 50Ω with an input RF

matching network. Parameter guaranteed by device characterization, not production tested.

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

noise. However, it is possible for a more sensitive receiver to exhibit range performance no better than that of a less sensitive receiver if the

background noise is appreciably higher than the thermal noise. Background noise refers to other interfering signals, such as FM radio stations,

pagers, etc.

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 “ether” noise.

More selective receivers will almost invariably provide better range. Only when the receiver selectivity is so high that most of the noise on the

receiver input is actually thermal will the receiver demonstrate sensitivity-limited performance.

Parameter scales linearly with reference oscillator frequency fT. For any reference oscillator frequency other than 14.3359MHz, compute new

parameter value as the ratio:

fREFOSCMHz × (parameter value at 14.3359MHz)

14.3359

Parameter scales inversely with reference oscillator frequency fT. For any reference oscillator frequency other than 14.3359MHz, compute

new parameter value as the ratio:

14.3359 × (parameter value at 14.3359MHz)

fREFOSCMHz

Parameter guaranteed by design (not tested).

Typical Characteristics

Supply Current

vs. Frequency

14

12

10

8

6

4

2

TA = 25°C

VDD = 5V

0

FREQUENCY (MHz)

Supply Current

vs. Temperature

16

14

f = 915MHz

VDD = 5V

12

10

8

6

4

2

0

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

MICRF005

4

October 2001

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