MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MRFIC2002/D
The MRFIC Line
900 MHz Transmit Mixer
The MRFIC2002 is a double-balanced, active mixer designed for transmitters
operating in the 800 MHz to 1.0 GHz frequency range. The design utilizes
Motorola’s advanced MOSAIC 3 silicon bipolar RF process to yield superior
performance in a cost effective monolithic device. Applications for the
MRFIC2002 include CT1 and CT2 cordless telephones, GSM, remote controls,
video and audio short range links, low cost cellular radios, and ISM band
transmitters. A power down control is provided to minimize current drain with
minimum recovery / turn-on time.
•
Conversion Gain = 10 dB (Typ)
•
Supply Current = 5.5 mA (Typ)
•
Power Down Supply Current = 2.0
µA
(Max)
•
LO-RF Isolation = 25 dB (Typ)
•
Low LO Drive Required = –10 dBm (Typ)
•
LO Impedance Insensitive to Power Down
•
No Matching Required for RF OUT Port
•
All Ports are Single Ended
•
Order MRFIC2002R2 for Tape and Reel.
R2 Suffix = 2,500 Units per 12 mm, 13 inch Reel.
•
Device Marking = M2002
ABSOLUTE MAXIMUM RATINGS
(TA = 25°C unless otherwise noted)
Rating
Supply Voltage
Control Voltages
Input Power, LO and IF Ports
Operating Ambient Temperature
Storage Temperature
Symbol
VCC
ENABLE, VRAMP
PLO, PIF
TA
Tstg
MRFIC2002
900 MHz TX-MIXER
SILICON MONOLITHIC
INTEGRATED CIRCUIT
CASE 751-06
(SO-8)
Value
5.5
5.0
+10
– 35 to + 85
– 65 to +150
Unit
Vdc
Vdc
dBm
°C
°C
IF IN 1
8
LO IN
VRAMP(1) 2
7
VCC
GND 3
BIAS
CNTL
6
GND
ENABLE 4
5
RF OUT
(1) For CT2 applications, apply ramp voltage provided in MRFIC2004. For non-CT2, leave open circuited.
Pin Connections and Functional Block Diagram
REV 3
©
MOTOROLA RF DEVICE DATA
Motorola, Inc. 1998
MRFIC2002
1
RECOMMENDED OPERATING RANGES
Parameter
Supply Voltage Range
Control Voltage Ranges
RF Port Frequency Range
IF Port Frequency Range
Symbol
VCC
ENABLE, VRAMP
fRF
fIF
Value
2.7 to 5.0
0 to 5.0
500 to 1000
0 (dc) to 250
Unit
Vdc
Vdc
MHz
MHz
ELECTRICAL CHARACTERISTICS
(VCC, Enable = 3.0 V and VRamp(1) Open Circuited, PLO = – 7.0 dBm, IF @ 100 MHz, LO @ 1.0
GHz, RF @ 900 MHz, TA = 25°C unless otherwise noted)
Characteristic (2)
Supply Current: On-Mode
Supply Current: Off-Mode (Enable < 1.0 V)
Enable Response Time
Conversion Gain
Single Sideband Noise Figure
Output Power at 1.0 dB Gain Compression
Output Power at Saturation
LO-RF Isolation (1.0 GHz)
LO-IF Isolation (1.0 GHz)
IF-RF Isolation (100 MHz)
IF-LO Isolation (100 MHz)
Min
—
—
—
8.0
—
—
–16
—
—
—
—
Typ
5.5
0.1
1.0
10
10
–18
–14
25
65
18
50
Max
7.0
2.0
—
12
—
—
—
—
—
—
—
Unit
mA
µA
µs
dB
dB
dBm
dBm
dB
dB
dB
dB
NOTES:
1. For CT2 applications, apply ramp voltage provided in MRFIC2004. For non-CT2, leave open circuited.
2. All Electrical Characteristics are measured in test circuit schematic as shown in Figure 1.
IF IN
50
Ω
C1
L1
C2
1
2
8
L2
C4
L3
LO IN
50
Ω
+
–
7
D.U.T.
6
C5
C6
C7
VRAMP* +
–
ENABLE +
–
C3
3
4
VCC
RF OUT
50
Ω
5
C1, C3, C6 — 1000 pF Chip Capacitor
C2 — 6.8 pF Chip Capacitor
C4 — 3.9 pF Chip Capacitor
C5 — 100 pF Chip Capacitor
C7 — 5.6 pF Chip Capacitor
L1 — 270 nH Chip Inductor
L2 — 10 nH Chip Inductor
L3 — 390 nH Chip Inductor
RF Connectors — SMA Type
Board Material — Glass/Epoxy
ε
r = 4.5,
Dielectric Thickness = 0.014″ (0.36 mm)
Figure 1. Test Circuit Configuration
MRFIC2002
2
MOTOROLA RF DEVICE DATA
13
G C , CONVERSION GAIN (dB)
12
TA = – 35°C
11
+ 25°C
10
+ 85°C
9
8
500
VCC = 3 V
fIF = 100 MHz
600
700
800
fRF, RF FREQUENCY (MHz)
900
1000
f = 0.5 GHz
0.9
ZRF
1.2
0
Zo = 50
Ω
ZIF
f = 0.5 GHz
ZLO
G C , CONVERSION GAIN (dB)
0.7
0.9
1.2
16
4V
14
0.1
18
VCC = 5 V
Figure 3. Gain versus RF Frequency
f = 0.25 GHz
12
3V
10
8
500
TA = 25°C
fIF = 100 MHz
600
700
800
fRF, RF FREQUENCY (MHz)
900
1000
Figure 2. Port Impedances versus Frequency
Figure 4. Gain versus RF Frequency
Γ
IF
VCC
(Volts)
3.0
f
(MHz)
50
100
150
200
250
500
600
700
800
900
1000
1100
1200
Mag
0.83
0.82
0.82
0.81
0.81
—
—
—
—
—
—
—
—
∠φ
Degrees
– 2.4
– 4.7
– 7.1
– 9.6
–11.7
—
—
—
—
—
—
—
—
Mag
—
—
—
—
—
0.42
0.41
0.40
0.39
0.36
0.33
0.31
0.28
Γ
RF
∠φ
Degrees
—
—
—
—
—
100
94
88
80
71
63
55
45
Mag
—
—
—
—
—
0.57
0.55
0.54
0.52
0.51
0.50
0.49
0.49
Γ
LO
∠φ
Degrees
—
—
—
—
—
– 29
– 35
– 41
– 48
– 54
– 60
– 65
– 70
Table 1. Deembedded Port Reflection Coefficients
(Enable = 3.0 V, Zo = 50
Ω,
TA = 25°C)
MOTOROLA RF DEVICE DATA
MRFIC2002
3
11
TA = – 35°C
G C , CONVERSION GAIN (dB)
G C , CONVERSION GAIN (dB)
10
25°C
85°C
VCC = 3 V
8
16
14
VCC = 5 V
4V
9
12
3V
10
TA = 25°C
7
–15
–12
–6
–9
PLO, LO INPUT POWER (dBm)
–3
0
8
–15
–12
–9
–6
PLO, LO INPUT POWER (dBm)
–3
0
Figure 5. Gain versus LO Input Power
Figure 6. Gain versus LO Input Power
–12
PRF , OUTPUT POWER (dBm)
PRF , OUTPUT POWER (dBm)
–2
–14
–6
VCC = 5 V
4V
–16
TA = – 35°C
VCC = 3 V
25°C
85°C
–10
–18
–14
3V
TA = 25°C
– 20
–18
– 22
– 30
– 26
– 22
–18
PIF, IF INPUT POWER (dBm)
–14
–10
– 22
– 30
– 26
– 22
–18
PIF, IF INPUT POWER (dBm)
–14
–10
Figure 7. Output Power versus IF Input Power
Figure 8. Output Power versus IF Input Power
–8
Po 1.0 dB , OUTPUT POWER (dBm)
VCC = 5 V
–10
4V
–12
–14
TA = 25°C
–16
3V
–18
–15
–12
–9
–6
PLO, LO INPUT POWER (dBm)
–3
0
Figure 9. Output Power at 1.0 dB Gain Compression
versus LO Input Power
MRFIC2002
4
MOTOROLA RF DEVICE DATA
14
8
25°C
6
– 35°C
4
VCC = 3 V
2
TA = 85°C
ICC , SUPPLY CURRENT (mA)
10
8
TA = + 85°C
25°C
– 35°C
6
4
3
ICC , SUPPLY CURRENT (mA)
4.6
5
12
3.4
3.8
4.2
VCC, SUPPLY VOLTAGE (V)
0
0
1
2
3
VEN, ENABLE VOLTAGE (V)
4
5
Figure 10. ICC versus VCC
Figure 11. ICC versus Enable Voltage
APPLICATIONS INFORMATION
DESIGN PHILOSOPHY
The MRFIC2002 was designed to have excellent LO and
spurious rejection. This is accomplished by using a double-
balanced configuration and using a symmetrical die layout.
To eliminate the need for external baluns or decoupling
elements, the unused LO and IF ports are decoupled inter-
nally. Only one of the RF outputs is used, eliminating the
need for an external balun on the RF port as well. Also, the
RF port is buffered to provide a 50 ohm output impedance.
External matching is required for the LO and IF ports.
To minimize current drain in various TDD/TDMA systems,
two methods of enabling/disabling the MRFIC2002 are pro-
vided: one that is TTL/CMOS compatible and one that is trig-
gered from a ramp, such as the one provided in the
MRFIC2004. The former method must be used if a ramp is
not available. The latter method is more desirable since the
MRFIC2002 can remain off during guard times and while in
idle mode.
THEORY OF OPERATION
Matching the LO port to 50 ohms can be done several
ways. The recommended approach is a series inductor as
close to the IC as possible. The inductor value is small
enough (~8 –15 nH depending on LO frequency) to be
printed on the board. A DC block is required and should not
be placed between the inductor and IC since this will prevent
the inductor from being placed close enough to the IC to pro-
vide a good match.
The IF port is approximately 500 ohms resistive in parallel
with 1.3 pF of capacitance. If 50 ohms is the desired IF port
impedance, a shunt capacitor followed by a series inductor
will provide the transformation. A DC block is required and
can be placed on either side of the matching network.
The RF port is nearly 50 ohms resistive in series with a
small amount of inductive reactance, which results in an
8 –11 dB return loss. However, a series 5.6 pF capacitor
placed as close to the IC as possible will typically provide
greater than a 15 dB return loss. The series capacitor also
serves as a DC block which is required.
Supply decoupling must be done as close to the IC as pos-
sible. A 1000 pF capacitor is recommended. An additional
100 pF capacitor and an RF choke are recommended to
keep the RF and LO signals off the supply line.
For systems that use a ramp, like the one provided in the
MRFIC2004, enabling/disabling can be done by applying the
ramp voltage to the VRAMP pin which trips the IC between 0.6
and 1.0 volts. The Enable pin must either be tied high or to
the inverse of the receiver enable control line, RXEN. An in-
verter is provided in the MRFIC2004 to invert RXEN.
For systems that do not use a ramp, the VRAMP pin can be
left open circuited and enabling/disabling the MRFIC2002
can be done with its TTL/CMOS compatible Enable pin. The
trip point is between 1.0 and 2.0 volts.
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
MRFIC2002
5
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