QwikRadio
tm
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 (T
A
)..........-40°C to +85°C
Package Thermal Resistance θ
JA
(14 Pin DIP)........90°C/W
Package Thermal Resistance θ
JA
(14 Pin SOIC)...120°C/W
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 = 50Ω
-20 dBm
Spurious Reverse Isolation
ANT pin, Rsc = 50Ω 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 50Ω.
Note 2: Spurious reverse isolation represents the spurious components which appear on the RF input (ANT) pin measured into 50Ω
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.
