MOTOROLA MRFIC2001

Order this document
by MRFIC2001/D
SEMICONDUCTOR TECHNICAL DATA
The MRFIC Line
The MRFIC2001 is an integrated downconverter designed for receivers
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
MRFIC2001 include CT-1 and CT-2 cordless telephones, remote controls,
video and audio short range links, low cost cellular radios, and ISM band
receivers. A power down control is provided to minimize current drain with
minimum recovery/turn-on time.
• Conversion Gain = 23 dB (Typ)
• Supply Current = 4.7 mA (Typ)
• Power Down Supply Current = 2.0 µA (Max)
• Low LO Drive = –10 dBm (Typ)
• LO Impedance Insensitive to Power Down
• No Image Filtering Required
• No Matching Required for RF IN Port
• All Ports are Single Ended
• Order MRFIC2001R2 for Tape and Reel.
R2 suffix = 2,500 Units per 12 mm, 13 inch Reel.
• Device Marking = M2001
900 MHz
DOWNCONVERTER
LNA/MIXER
SILICON MONOLITHIC
INTEGRATED CIRCUIT
CASE 751-05
(SO-8)
ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise noted)
Rating
Supply Voltage
Symbol
Value
Unit
VCC
5.5
Vdc
Control Voltage
ENABLE
5.0
Vdc
Input Power, RF and LO Ports
PRF, PLO
+10
dBm
TA
– 35 to + 85
°C
Tstg
– 65 to +150
°C
Operating Ambient Temperature
Storage Temperature
RF IN
1
8
ENABLE
GND
2
7
VCC
GND
3
6
GND
LO IN
4
5
IF OUT/VCC
LNA
Pin Connections and Functional Block Diagram
REV 2
RF DEVICE DATA
MOTOROLA
Motorola, Inc. 1994
MRFIC2001
1
RECOMMENDED OPERATING RANGES
Symbol
Value
Unit
Supply Voltage Range
Parameter
VCC
2.7 to 5.0
Vdc
Control Voltage Range
ENABLE
0 to 5.0
Vdc
RF Port Frequency Range
fRF
500 to 1000
MHz
IF Port Frequency Range
fIF
0 (dc) to 250
MHz
ELECTRICAL CHARACTERISTICS (VCC, ENABLE = 3.0 V, TA = 25°C, RF @ 900 MHz, LO @ 1.0 GHz, PLO = –7.0 dBm,
IF @ 100 MHz unless otherwise noted)
Characteristic (1)
Min
Typ
Max
Unit
Supply Current: On-Mode
—
4.7
5.5
mA
Supply Current: Off-Mode (ENABLE < 1.0 Volts)
—
0.1
2.0
µA
ENABLE Response Time
—
1.0
—
µs
Conversion Gain
20
23
26
dB
Input Return Loss (RF IN Port)
—
13
—
dB
Single Sideband Noise Figure
—
5.5
—
dB
Input 3rd Order Intercept Point
– 26
– 22.5
—
dBm
Output Power at 1.0 dB Gain Compression
—
–10
—
dBm
LO – RF Isolation (1.0 GHz)
—
37
—
dB
LO – IF Isolation (1.0 GHz)
—
33
—
dB
RF – IF Isolation (900 MHz)
—
4.0
—
dB
RF – LO Isolation (900 MHz)
—
19
—
dB
NOTE:
1. All Electrical Characteristics measured in test circuit schematic shown in Figure 1 below:
C3
C1
RF IN
50 Ω
1
8
2
7
+ ENABLE
–
L3
C4
D.U.T.
LO IN
50 Ω
C2
3
6
4
5
+ VCC
–
C5
C6
L1
IF OUT
50 Ω
L2
C7
C1, C2, C4, C7 — 100 pF Chip Capacitor
C3, C5, C8 — 1000 pF Chip Capacitor
C6 — 6.8 pF Chip Capacitor
L1 — 8.2 nH Chip Inductor
L2 — 270 nH Chip Inductor
C8
+ VCC
–
L3 — 150 nH Chip Inductor
RF Connectors — SMA Type
Board Material — Epoxy/Glass εr = 4.5,
Dielectric Thickness = 0.014″ (0.36 mm)
Figure 1. Test Circuit Configuration
MRFIC2001
2
MOTOROLA RF DEVICE DATA
30
GC , CONVERSION GAIN (dB)
TA = – 35°C
28
VCC = 3 V
fIF = 100 MHz
HIGH SIDE LO INJECTION
PLO = –7 dBm
25°C
26
85°C
24
22
20
500
600
700
800
900
1000
fRF, RF FREQUENCY (MHz)
Figure 3. Conversion Gain versus RF Frequency
ZIF
0.9
f = 0.5 GHz
1.2
0.9
f = 0.5 GHz
36
TA = 25°C
fIF = 100 MHz
HIGH SIDE LO INJECTION
PLO = –7 dBm
0.25
GC , CONVERSION GAIN (dB)
ZRF
0.05
Zo = 50 Ω
1.2
ZLO
VCC = 5 V
33
4V
30
27
3V
24
21
500
600
700
800
900
1000
fRF, RF FREQUENCY (MHz)
Figure 2. Port Impedances versus Frequency (GHz)
Figure 4. Conversion Gain versus RF Frequency
ΓIF
ΓRF
ΓLO
VCC
(Volts)
f
(MHz)
Mag
M
∠φ
Degrees
Mag
M
∠φ
Degrees
Mag
M
∠φ
Degrees
3.0
50
0.998
– 2.5
—
—
—
—
100
0.996
– 4.9
—
—
—
—
150
0.993
– 7.2
—
—
—
—
200
0.990
–10
—
—
—
—
250
0.987
–12
—
—
—
—
500
—
—
0.36
–70
0.58
– 31
600
—
—
0.32
–70
0.55
– 36
700
—
—
0.29
– 69
0.53
– 42
800
—
—
0.26
– 68
0.51
– 48
900
—
—
0.23
– 63
0.50
– 54
1000
—
—
0.20
– 58
0.49
– 61
1100
—
—
0.18
– 51
0.47
– 68
1200
—
—
0.17
– 44
0.45
– 76
Table 1. Port Reflection Coefficients
(ENABLE = 3.0 V, Zo = 50 Ω, TA = 25°C)
MOTOROLA RF DEVICE DATA
MRFIC2001
3
TYPICAL CHARACTERISTICS
30
25
23
25°C
22
85°C
VCC = 3 V
fRF = 900 MHz
fLO = 1 GHz
21
–12
– 9.0
– 6.0
– 3.0
28
4V
26
24
3V
TA = 25°C
fRF = 900 MHz
fLO = 1 GHz
22
20
–15
0
–12
– 9.0
– 6.0
– 3.0
0
PLO, LO INPUT POWER (dBm)
PLO, LO INPUT POWER (dBm)
Figure 5. Conversion Gain versus LO Input Power
Figure 6. Conversion Gain versus LO Input Power
– 20
– 22
TA = 85°C
– 24
25°C
– 26
– 35°C
– 28
VCC = 3 V
– 30
500
7.0
6.0
600
700
800
900
1000
–19
VCC = 5 V
4V
– 21
3V
– 23
– 25
– 27
TA = 25°C
– 29
500
600
700
800
900
1000
fRF, RF FREQUENCY (MHz)
fRF, RF FREQUENCY (MHz)
Figure 7. Input Third Order Intercept Point
versus RF Frequency
Figure 8. Input Third Order Intercept Point
versus RF Frequency
8.0
TA = 25°C
θIM = 30°
HIGH SIDE LO INJECTION
fIF = 100 MHz
PLO = –7 dBm
7.0
NF, NOISE FIGURE (dB)
IIP3, INPUT 3RD ORDER INTERCEPT PT (dBm)
20
–15
NF, NOISE FIGURE (dB)
GC , CONVERSION GAIN (dB)
24
IIP3, INPUT 3RD ORDER INTERCEPT PT (dBm)
GC , CONVERSION GAIN (dB)
VCC = 5 V
TA = – 35°C
VCC = 3 V
5.0
4V
4.0
800
6.0
VCC = 3 V
5.0
4V
4.0
5V
3.0
750
TA = 25°C
θIM = 30°
fRF = 900 MHz
fLO = 1 GHz
5V
850
900
950
1000
3.0
–10
– 8.0
– 6.0
– 4.0
– 2.0
0
2.0
fRF, RF FREQUENCY (MHz)
PLO, LO INPUT POWER (dBm)
Figure 9. Noise Figure versus RF Frequency
Figure 10. Noise Figure versus LO Input Power
MRFIC2001
4
4.0
MOTOROLA RF DEVICE DATA
TYPICAL CHARACTERISTICS
7.0
8.0
VCC = 3 V
ICC, SUPPLY CURRENT (mA)
6.0
NF, NOISE FIGURE (dB)
7.0
VCC = 3 V
6.0
4V
TA = 25°C
fRF = 900 MHz
PLO = –7 dBm
fLO = 1 GHz
5.0
5V
4.0
–180
–120
– 60
0
60
120
TA = 85°C
5.0
4.0
25°C
– 35°C
3.0
2.0
1.0
0
180
0
1.0
2.0
3.0
4.0
5.0
θIM, REFLECTION COEFFICIENT PHASE ANGLE OF
RF PORT IMAGE TERMINATION (°)
ENABLE, ENABLE VOLTAGE (VOLTS)
Figure 11. Noise Figure versus Reflection Coefficient
Phase Angle of RF Port Image Termination
Figure 12. Supply Current versus Enable Voltage
12
TA = 25°C
ICC, SUPPLY CURRENT (mA)
10
VCC = 5 V
8.0
4V
6.0
3V
4.0
2.0
0
0
1.0
2.0
3.0
4.0
5.0
ENABLE, ENABLE VOLTAGE (VOLTS)
Figure 13. Supply Current versus Enable Voltage
APPLICATIONS INFORMATION
DESIGN PHILOSOPHY
The MRFIC2001 was designed for low cost, small size,
and ease of use. This is accomplished by minimizing the
number of necessary external components.
The most significant external component eliminated
was an image filter between the LNA and mixer. It was
found the ensuing image noise entering the mixer from
the LNA could be minimized by optimizing the LNA input
termination at the image frequency. Also, a double-balanced mixer was used to reject the IF noise from the LNA.
This results in excellent LO and spurious rejection.
To eliminate the need for external baluns or decoupling
elements, the unused LO and RF ports of the mixer are
decoupled internally. Only one of the IF outputs is used,
eliminating the need for an external balun on the IF port
as well. Also, the LNA input is matched to 50 ohms internally. External matching is required for the LO and IF
ports.
MOTOROLA RF DEVICE DATA
To minimize current drain in various TDD/TDMA systems, the MRFIC2001 has a TTL/CMOS compatible enable pin.
THEORY OF OPERATION
Optimizing the LNA input termination to minimize image
noise is quite simple. The optimum LNA input (RF IN pin) termination is 1∠30° at the image frequency (regardless of what
the image frequency is). A reflection coefficient magnitude
close to 1 is automatically obtained from a front-end filter,
since the image frequency would be in the stop-band. The 30°
phase angle can be obtained by rotating the phase angle of
the front-end filter with a series 50 ohm transmission line. The
dependance of single-sideband noise figure on the image
phase angle is shown in Figure 11. As the plot indicates, there
is a little over 1.0 dB of variation across all possible phase
angles for a 3.0 V supply. Therefore, setting the phase angle is
not critical. At higher supply voltages setting the phase angle
is more critical (and more rewarding).
MRFIC2001
5
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 close enough to the IC to provide a
good match.
The IF port is an open collector resulting in a very high output impedance. For optimum linearity (IP3), the IF port
should be loaded with a 1000 ohm load-line. Since the output
requires a bias inductor and blocking capacitor, the IF filter
impedance can be transformed to 1000 ohms with these two
elements. If a low output VSWR is desired (to reduce IF filter
ripple), a 2.0 – 4.0 K ohm resistor can be placed in parallel
with the bias inductor. This will reduce the conversion gain by
1.0 – 2.0 dB.
The RF port is nearly 55 ohms resistive in series with a
small amount of capacitive reactance, which results in a
12–13 dB return loss. If a higher return loss is desired, a
3.0 – 4.0 nH series inductor printed on the board as close to
the IC as possible will improve it to over 20 dB. A DC block is
also required.
Supply decoupling must be done as close to the IC as possible. A 1000 pF capacitor is recommended. An additional
100 pF capacitor and an RF choke are recommended to
keep the LO signal off the supply line.
Enabling/Disabling the MRFIC2001 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 Integrated 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 contact your local Motorola Distributor or Sales Office.
PACKAGE DIMENSIONS
D
A
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. DIMENSIONS ARE IN MILLIMETERS.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
C
8
5
0.25
H
E
M
B
M
1
4
h
B
e
X 45 _
q
A
C
SEATING
PLANE
L
0.10
A1
B
0.25
M
C B
S
A
S
DIM
A
A1
B
C
D
E
e
H
h
L
q
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.35
0.49
0.18
0.25
4.80
5.00
3.80
4.00
1.27 BSC
5.80
6.20
0.25
0.50
0.40
1.25
0_
7_
CASE 751– 05
ISSUE S
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
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arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
Mfax is a trademark of Motorola, Inc.
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MRFIC2001
6
◊
MRFIC2001/D
MOTOROLA RF DEVICE
DATA