MICRF010
QwikRadio Low-Power UHF Receiver
QwikRadio is a registered trademark of Micrel, Inc. The QwikRadio Ics were developed under a partnership agreement with AIT of Orlando, Florida.
June 2005
M9999-063005
(408) 955-1690
General Description
The MICRF010 is a single chip, ASK/OOK (ON-OFF
Keyed) RF receiver IC recommended for new designs
replacing the MICRF007. It provides the same function with
sensitivity enhancement, typically 6dB better than the
MICRF007. Just like all other members of the QwikRadio
family, the MICRF010 achieves low power operation, a
very high level of integration, and it is particularly easy to
use.
All post-detection data filtering is provided on the
MICRF010, so no external baseband filters are required. In
fact, the entire receiver circuit is made of very few external
components and with the 8-pin SOIC package makes it
ideal for small printed circuit board area applications.
The MICRF010 works in fixed-mode (FIX) operation, which
functions as a conventional super-heterodyne receiver.
Fixed-mode provides better selectivity and sensitivity
performance in comparison with sweep mode used in other
Micrel receivers intended for lower cost applications.
Data sheets and support documentation can be found on
Micrel's web site at www.micrel.com.
QwikRadioTM
Features
High sensitivity (104dBm)
300MHz to 440MHz frequency range
Data-rate up to 2.0kbps (Manchester encoding)
Low power consumption
2.9mA fully operational (315MHz)
0.15A in shutdown
290A in polled mode (10:1 duty-cycle)
Shutdown input
Automatic tuning, no manual adjustment
Very low RF re-radiation at the antenna
Highly integrated with extremely low external part count
Applications
Automotive remote keyless entry (RKE)
Long range RF identification
Remote fan and light control
Garage door and gate openers
Ordering Information
Part Number
Standard Pb-Free
Operating Mode
Shutdown
Package
MICRF010BM MICRF010YM Fixed
Yes
8-pin
SOIC
Typical Application
17cm 22AWG MAGNET WIRE
433.92Mhz 1000 bps Manchester Encoded On-Off Keyed Receiver
Micrel
MICRF010
June 2005
2
M9999-063005
(408) 955-1690
Pin Configuration
Standard 8-Pin SOIC (M)
Pin Description
Pin Number
Pin Name
Pin Function
1 VSS
Ground Return (input): ground return to the power supply. See "Applications Information" for bypass
capacitor details.
2 ANT
Antenna (Input): See "Applications Information" for information on input impedance. For optimal
performance the antenna impedance should be matched to the antenna pin impedance.
3 VDD
Power Supply (Input): Positive Supply input for the RF IC. Connect a low ESL, low ESR decoupling
capacitor from this to VSS, with lead length kept as short as possible.
4 CTH
[Data Slicing] Threshold Capacitor (External Component): Capacitor extracts the DC average value
from the demodulated waveform, which becomes the reference for the internal data slicing comparator.
See "Applications Information" for selection.
5
DO
Digital Output (Output): CMOS level compatible data output signal.
6 SHUT
Shutdown (Input): Shutdown-mode logic-level control input. Pull low to enable the receiver. This input
is pulled-up internally to VDD.
7 CAGC
AGC Capacitor (External Component): Integrating capacitor for on-chip AGC (automatic gain control).
See "Applications Information" for capacitor selection.
8 REFOSC
Reference Oscillator (External Component or Input): Timing reference for on-chip tuning and
alignment.
Micrel
MICRF010
June 2005
3
M9999-063005
(408) 955-1690
Absolute Maximum Ratings
(1)
Supply Voltage (V
DDRF
, V
DDBB
)................................... +7V
Input/Output Voltage (V
I/O
) ................ V
SS
0.3 to V
DD
+0.3
Max Input Power ...................................................+20dBm
Junction Temperature (T
J
) ..................................... +150C
Storage Temperature Range (T
S
)........... 65C to +150C
Lead Temperature (soldering, 10 sec.).................. +260C
ESD Rating .............................................................
Note 3
Operating Ratings
(2)
Supply Voltage (V
DDRF
, V
DDBB
) ...............+4.75V to +5.5V
Max Input Power ....................................................... 0dBm
RF Frequency Range ............................300MHz to 440Hz
Data Duty-Cycle.............................................. 20% to 80%
Reference Oscillator Input Range........... 0.2V
PP
to 1.5V
PP
Ambient Temperature (T
A
)........................ 40C to +85C
Electrical Characteristics
(4)
4.75V V
DD
5.5V, V
SS
= 0V; C
AGC
= 4.7F, C
TH
= 0.022F; f
REFOSC
= 9.794MHz (equivalent to f
RF
= 315MHz); data rate = 600 bps
(Manchester encoded). T
A
= 25C,
bold
values indicate 40C T
A
+85C; current flow into device pins is positive, unless noted.
Symbol Parameter
Condition
Min Typ Max Units
I
OP
Operating Current
continuous operation, f
RF
= 315MHz
2.9
4.5
mA
Polled
with
10:1 duty cycle, f
RF
= 315MHz
290
A
Continuous operation, f
RF
= 433.92MHz
4.7
7.5
A
Polled
with
10:1 duty cycle, f
RF
= 433.92MHz
470
A
I
STBY
Standby Current
V
SHUT
= 0.8VDD
0.15
0.5
A
RF Section, IF Section
Receiver
Sensitivity(4) f
RF
= 315MHz Note 4
105
dBm
f
RF
= 433.92MHz Note 4
103
f
IF
IF Center Frequency
Note 5
0.86
MHz
f
BW
IF 3dB Bandwidth
Note 5
0.6
MHz
Spurious Reverse Isolation
ANT pin, R
SC
= 50
(6)
30
Vrms
AGC Attack to Decay Ratio
t
ATTACK
t
DECAY
0.1
AGC
Leakage
Current T
A
= +85
100
nA
Reference Oscillator
Z
REFOSC
Reference Oscillator
Input Impedance
Note 7
290
k
Reference Oscillator Source
Note 8
5.0
A
Demodulator
Z
CTH
CTH Source Impedance
Note 9
150
k
I
ZCTH(leak)
CTH Leakage Current
T
A
= +85C
100
nA
Demodulator Filter Bandwidth
Note 5
2000
Hz
Micrel
MICRF010
June 2005
4
M9999-063005
(408) 955-1690
Symbol Parameter
Condition
Min Typ Max Units
Digital/Control Section
V
IH
Input High Voltage
SHUT
0.8
V
DD
V
IL
Input Low Voltage
SHUT
0.2
V
DD
I
OUT
Output Current
DO pin, push-pull
45
A
V
OH
Output High Voltage
DO pin, I
OUT
= 30A
0.9
V
DD
V
OL
Output Low Voltage
DO pin, I
OUT
= +30A
0.1
V
DD
t
R
, t
F
Output Rise and Fall Time
DO pin, C
LOAD
= 15pF
4
s
Notes:
1. Exceeding absolute maximum ratings may damage the device.
2. The device is not guaranteed to function outside its operating ratings.
3. Devices are ESD sensitive, use appropriate ESD precautions. The device meets Class 1 ESD test requirements, (human body model HBM), in
accordance with MIL-STD-883C, method 3015. Do not operate or store near strong electrostatic fields.
4. Sensitivity is defined as the average signal level measured at the input necessary to achieve 10
-2
BER (bit error rate). The RF input is assumed to
be matched to 50.
5. Parameter scales linearly with reference oscillator frequency f
T
. For any reference oscillator frequency other than 9.794MHz, compute new
parameter value as the ratio:
f
REFOSC
MHZ
9.794MHz
parameter value at 9.79MHz
(
)
6. Spurious reverse isolation represents the spurious components, which appear on the RF input pin (ANT) measured into 50 with an input RF
matching network.
7. Series resistance of the resonator (ceramic resonator or crystal) should be minimized to the extent possible. In cases where the resonator series
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 50 and 100, respectively.
8. Crystal load capacitor is 10pF. See Figure 5 in "REFOSC" section for reference oscillator operation.
9. Parameter scales inversely with reference oscillator frequency f
T
. For any reference oscillator frequency other than 9.794MHz, compute new
parameter value as the ratio:
9.794MHz
f
REFOSC
MHZ
parameter value at 9.794MHz
(
)
Micrel
MICRF010
June 2005
5
M9999-063005
(408) 955-1690
Typical Characteristics
1.5
3.0
4.5
6.0
250
300
350
400
450
500
FREQUENCY (MHz)
Supply Current
vs. Frequency
Fix Mode,
Continuous Operation
CURR
E
N
T (
m
A
)
T
A
= 25 C
V
DD
= 5V
o
2.0
2.5
3.0
3.5
4.0
-40 -20 0
20 40 60 80 100
CUR
RENT
(
m
A
)
TEMPERATURE ( C)
Supply Current
vs. Temperature
f = 315 MHZ
V
DD
= 5V
Fix Mode
Continuous Operation
o
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