MRFIC1803R2 데이터 시트보기 (PDF) - Motorola => Freescale
부품명
상세내역
제조사
MRFIC1803R2 Datasheet PDF : 6 Pages
| |||
Frequency (MHz)
1500
1550
1600
1650
1700
1750
1800
1850
1900
1950
2000
2050
2100
2150
2200
2250
2300
2350
2400
2450
2500
RF Output
LO Input
22.07 –j11.36
41.98 +j22.31
21.74 –j4.69
50.60 +j9.80
22.28 +j2.16
41.93 –j0.07
24.01 +j8.25
32.74 +j3.32
26.64 +J14.13
28.78 +j11.39
30.83 +j20.11
28.98 +j21.04
36.39 +j25.30
32.13 +j30.26
43.92 +j29.26
37.68 +j40.38
54.37 +j30.98
48.31 +j54.15
65.34 +j28.57
68.80 +j70.87
75.30 +j21.12
118.18 +j86.46
81.19 +j8.43
220.83 +j17.19
80.22 –j4.24
148.91 –j120.77
74.20 –j14.00
58.50 –j105.11
65.50 –j19.72
27.23 –j71.51
57.40 –j21.38
17.22 –j50.26
50.59 –j20.61
13.00 –j35.19
44.53 –j18.16
10.95 –j22.96
40.24 –j14.78
10.23 –j13.58
37.73 –j10.54
10.20 –j5.32
36.38 –j6.72
10.62 +j2.90
Table 1. Selected Device Impedances
LO Output
20.09 +j31.15
26.39 +j40.79
37.63 +j52.47
56.16 +j63.47
87.97 +j67.31
131.33 +j40.34
137.85 –j16.48
103.88 –j50.81
69.58 –j53.97
50.13 –j46.24
38.97 –j36.86
32.08 –j27.58
28.43 –j19.86
26.56 –j12.82
26.03 –j5.89
26.73 –j0.03
28.46 +j5.10
30.88 +j9.86
33.75 +j13.92
37.50 +j17.32
42.00 +j20.34
DESIGN AND APPLICATIONS INFORMATION
The MRFIC1803 combines a single–balanced FET mix-
er with an LO pre–amp and an exciter amplifier to form a
self–contained upconverter. The device is usable from RF
frequencies of 1.7 to 2.5 GHz and at IF frequencies of 70
to 325 MHz. The design is optimized for low side injection
in hetrodyne transmitter applications. In the upconversion
process, modulation is imparted to an IF carrier which is
converted to the RF transmit frequency by a mixer. By DC
coupling the IF input, the device can be used for simple
on–off keying (OOK) or bi–phase shift keying (BPSK) ap-
plications with no IF.
The MRFIC1803 design minimizes the need for off–chip
components. An active balun is employed at the IF input
W and provides an excellent broadband 50 match over the
full range of IF frequencies. The LO quadrature divider is
passive and internal to the device. The LO buffer amplifier
is equipped with a diversity switch which switches the am-
plified LO signal to the LO output pin during RECEIVE
mode. The –5 dBm LO output is the appropriate level to
drive the MRFIC1804 for 1.8 GHz applications or the
MRFIC2401 for 2.4 GHz applications.
As shown in Figure 1, the device is easy to use with
minimal off–chip components. More or less bypassing of
the control and supply lines may be required depending
on board layout and shielding. Careful layout of the RF
frequency portions of the board is critical to successful
implementation. Controlled impedance lines must be used
and any off–chip components must be mounted as close to
the IC as possible. The applications circuit was used to
gather the information displayed in the typical characteris-
tics curves. Since the MRFIC1803 design was optimized
for the 1.7 to 1.9 GHz frequency range, improved perfor-
mance can be had with some off–chip matching at fre-
quencies outside this range. In particular, matching of the
LO port will supply higher LO drive and improve conver-
sion gain. At the RF output, either better gain or better 1dB
compression can be had with external matching.
Filtering is generally required in the upconversion pro-
cess to reduce image and LO radiation. To minimize pin
count, this filtering is accomplished external to the device
at the exciter output. For the frequency ranges of applica-
tion, two and three pole ceramic surface filters are avail-
able at reasonable cost and with less than 2 dB of loss.
EVALUATION BOARDS
Evaluation boards are available for RF Monolithic Inte-
grated Circuits by adding a “TF” suffix to the device type.
For a complete list of currently available boards and ones
in development for newly introduced product, please con-
tact your local Motorola Distributor or Sales Office.
MOTOROLA RF DEVICE DATA
MRFIC1803
5
Share Link: 