MICRF002YM Micrel Inc, MICRF002YM Datasheet - Page 11

• Manufacturer Part Number: MICRF002YM
• Description: IC ASK RCVR RF/IF SHUTDWN 16SOIC
• Manufacturer: Micrel Inc

Specifications of MICRF002YM

• Frequency: 300MHz ~ 440MHz
• Sensitivity: -95dBm
• Data Rate - Maximum: 10 kbps
• Modulation Or Protocol: ASK, OOK
• Applications: RKE
• Current - Receiving: 2.2mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Features: Automatic Tuning
• Voltage - Supply: 4.75 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Receiving Current: 3.2mA
• Data Rate: 10Kbps
• Modulation Type: ASK, OOK
• Frequency Range: 300MHz To 440MHz
• Sensitivity Dbm: -97dBm
• Rf Ic Case Style: SOIC
• No. Of Pins: 16
• Operating Band Frequency: 300 to 440MHz
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 576-1332

Additional Applications Information
In addition to the basic operation of the MICRF002 the
following enhancements can be made. In particular it is
strongly recommended that the antenna impedance is
matched to the input of the IC.
Antenna Impedance Matching
As shown in Table 4 the antenna pin input impedance is
frequency dependant. The ANT pin can be matched to 50Ω
with an L-type circuit. That is, a shunt inductor from the RF
input to ground and another in series from the RF input to
the antenna pin.
Inductor values may be different from table depending on
PCB material, PCB thickness, ground configuration, and
how long the traces are in the layout. Values shown were
characterized for a 0.031 thickness, FR4 board, solid
ground plane on bottom layer, and very short traces.
MuRata and Coilcraft wire wound 0603 or 0805 surface
mount inductors were tested, however any wire wound
inductor with high SRF (self resonance frequency) should
do the job.
Shutdown Function
Duty-cycled operation of the MICRF002 (often referred to
as polling) is achieved by turning the MICRF002 on and off
via the SHUT pin. The shutdown function is controlled by a
logic state applied to the SHUT pin. When VSHUT is high,
the device goes into low-power standby mode. This pin is
pulled high internally, it must be externally pulled low to
enable the receiver.
Micrel, Inc.
July 2008
0
–j25
j25
L
SHUNT
50
L
SERIES
–j100
j100
∞
11
Frequency
(MHz)
300
305
310
315
320
325
330
335
340
345
350
355
360
365
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
Table 4. Input Impedance vs. Frequency
12-j166
12-j165
12-j163
13-j162
12-j160
12-j157
12-j155
12-j152
11-j150
11-j148
11-j145
11-j143
11-j141
11-j139
10-j137
10-j135
10-j133
10-j131
10-j130
10-j128
10-j126
10-j124
10-j122
10-j120
10-j118
10-j117
10-j115
10-j114
8-j112
Z11
Z
IN
0.803-j0.529
0.800-j0.530
0.796-j0.536
0.791-j0.536
0.789-j0.543
0.782-j0.550
0.778-j0.556
0.770-j0.564
0.767-j0.572
0.762-j0.578
0.753-j0.586
0.748-j0.592
0.742-j0.597
0.735-j0.603
0.732-j0.612
0.725-j0.619
0.718-j0.625
0.711-j0.631
0.707-j0.634
0.700-j0.641
0.692-j0.647
0.684-j0.653
0.675-j0.660
0.667-j0.667
0.658-j0.673
0.653-j0.677
0.643-j0.684
0.638-j0.687
0.635-j0.704
S11
L
MICRF002/RF022
SHUNT
8.2
15
15
15
15
15
12
12
12
15
15
12
12
10
10
12
12
10
10
10
10
10
10
10
10
10
10
10
10
M9999-070808
(nH)
L
SERIES
72
72
72
72
68
68
68
68
56
56
56
56
56
56
47
47
47
47
43
43
43
39
39
39
36
36
33
33
33
(nH)