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4

December 1998b

MICRF011

MICRF011

Micrel

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VDDRF, VDDBB).................................+7V

Voltage on any I/O Pin.........................VSS-0.3 to VDD+0.3

Junction Temperature..............................................+150

°C

Storage Temperature Range.....................-65

°C to + 150°C

Lead Temperature (soldering, 10 seconds).............+ 260

°C

Operating Ratings

Supply Voltage (VDDRF, VDDBB)..................4.75V to 5.5V

Ambient Operating Temperature (TA)..........-40°C to +85°C

Package Thermal Resistance

Package Thermal Resistance

This device is ESD sensitive: Meets Class 1ESD test

requirements (Human body Model, HBM), in

accordance with MIL-STD-883C, Method 3015. Do

not operate or store near strong electrostatic fields.

Use appropriate ESD precautions.

Electrical Characteristics

Unless otherwise stated, these specifications apply for Ta=-40

°C to 85°C, 4.75<VDD<5.5V. All voltages are with respect to

Ground; Positive currents flow into device pins.

CAGC = 4.7µF, CTH = .047µF, VDDRF= VDDBB = VDD.

REFOSC

frequency =4.90MHz. Note: Items in bold represent changes from the MICRF001 specification.

Parameter

Test Conditions

MIN

TYP

MAX

UNITS

Power Supply

Operating Current

2.4

mA

RF/IF Section

Receiver Sensitivity

Note 1, 3

-103

dBm

IF Center Frequency

Note 4

0.86

MHz

IF 3dB Bandwidth

Note 3, 4

0.43

MHz

RF Input Range

300

440

MHz

Receive Modulation Duty-Cycle

20

80

%

Maximum Receiver Input

Rsc = 50

Ω

-20

dBm

Spurious Reverse Isolation

ANT pin, Rsc = 50

Ω Note 2

30

µVrms

AGC Attack / Decay ratio

T(Attack) / T(Decay)

0.1

Local Oscillator Stabilization Time

To 1% of Final Value

2.5

msec

Demod Section

CTH Source Impedance

Note 5

118k

Ω

CTH Source Impedance Variation

-15

+15

%

Demod Filter Bandwidth

SEL0 = SEL1 = SWEN = VDD, Note 4, 6

4160

Hz

Demod Filter Bandwidth

SEL0 = SEL1 = VDD, SWEN = VSS

Note 4, 6

8320

Hz

Digital Section

REFOSC Input Impedance

200k

Ω

Input Pullup Current

SEL0, SEL1, SWEN = VSS

8

µA

Input High Voltage

SEL0, SEL1, SWEN

0.8VDD

V

Input Low Voltage

SEL0, SEL1, SWEN

0.2VDD

V

Output Current

DO pin, Push-Pull

10

µA

Output High Voltage

DO pin, Iout = -1µA

0.9VDD

V

Output Low Voltage

DO pin, Iout = +1µA

0.1VDD

V

Output Tr, Tf

DO pin, Cload= 15pF

10

µsec

Note 1:

Sensitivity is defined as the average signal level measured at the input necessary to achieve 10e-2 Bit Error Rate (BER). The

input signal is defined as a return-to-zero (RZ) waveform with 50% average duty cycle (e.g., Manchester Encoded Data) at a

data rate of 300bps. The RF input is assumed to be matched into 50

Ω.

Note 2:

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

Ω

with an input RF matching network.

Note 3:

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 “ether” noise is appreciably higher than the thermal noise. “Ether” noise refers to other interfering

“noise” sources, such as FM radio stations, pagers, etc.

A better indicator of 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.