MICRF112YMM Micrel Inc, MICRF112YMM Datasheet - Page 14
![IC XMITTER UHF ASK/FSK 10-MSOP](/photos/6/84/68455/576-10-msop_sml.jpg)
MICRF112YMM
Manufacturer Part Number
MICRF112YMM
Description
IC XMITTER UHF ASK/FSK 10-MSOP
Manufacturer
Micrel Inc
Datasheet
1.MICRF112-433_EV.pdf
(20 pages)
Specifications of MICRF112YMM
Frequency
300MHz ~ 450MHz
Applications
RKE
Modulation Or Protocol
ASK, OOK
Data Rate - Maximum
50 kbps
Power - Output
10dBm
Current - Transmitting
12.3mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
1.8 V ~ 3.6 V
Operating Temperature
-40°C ~ 125°C
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Transmitting Current
12.5mA
Data Rate
50Kbps
Frequency Range
300MHz To 450MHz
Modulation Type
ASK, FSK
Rf Ic Case Style
MSOP
No. Of Pins
10
Supply Voltage Range
1.8V To 3.6V
Operating
RoHS Compliant
Output Power
10dBm
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Memory Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
576-1963-5
MICRF112YMM
MICRF112YMM
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MICRF112YMM
Manufacturer:
MICREL
Quantity:
700
Part Number:
MICRF112YMM
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Company:
Part Number:
MICRF112YMM-TR
Manufacturer:
TI
Quantity:
87
Application Information
Note: Values in parenthesis are for 315MHz
The MICRF112 is well suited to drive a 50 ohms source,
monopole or a loop antenna. Figure 6 is an example of a
loop antenna configuration. Figure 6 also shows both
315MHz and 433.92MHz ASK configurations for a loop
antenna. Besides using a different crystal, Table 1 lists
modified values needed for the listed frequencies.
Frequency
(MHz)
315.0
433.92
The reference design shown in Figure 6 has an antenna
optimized for using the matching network as described in
Table 1.
Power Control Using External Resistor
R7 is used to adjust the RF output levels which may be
needed to meet compliance. As an example, the
following tables list typical values of conducted RF
output levels and corresponding R7 resistor values for
the 50
Demo board using the loop antenna can be adjusted for
the appropriate radiated field allowed by FCC or ETSI
compliance. Contact Micrel for suggested values to meet
FCC and ETSI compliances.
Micrel, Inc.
March 2008
Ω
test board shown in Figure 2. R7 of the TX112
(nH)
470
680
L1
(pF)
C5
10
10
Table 1
(nH)
150
L4
82
(pF)
6.8
4.7
C7
Figure 6. ASK 433.92MHz and 315MHz
Y1 (MHz)
9.84375
13.5600
14
R7, Ω
0
75
100
500
1000
0
75
100
500
1000
R7, Ω
Output Power Versus External Resistor at 433.92 MHz
Output Power Versus External Resistor at 315MHz
Output Power, dBm
10
8.5
8.0
1.6
-3.8
Output Power, dBm
8.68
8.34
8.02
4.34
0.42
IDD, mA
6.7
6.3
6.2
4.13
4.87
IDD, mA
7.5
7.33
7.3
6.3
5.5
(408) 944-0800
M9999-031008
MICRF112