Dual Mode Cellular Downconverter
869 - 893 MHz
Features
•
•
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•
•
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Dual Mode Downconverter with LO Amplifier
3mm 12-Lead PQFN Package
Operates over 2.7 V to 5 V Supply Voltage
High Gain: 12.5 dB Typical
High Input Intercept Point: +8 dBm Typical
Low Current Draw: 12 mA Typical
Adjustable IP3 Level
Low LO Drive Level: -10 dBm
MADCSM0011
V2
Functional Block Diagram
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Description
M/A-COM’s
MADCSM0011
integrated
downconverter combines a downconverting mixer,
an IF amplifier, a LO buffer amplifier and an output
mode switch. The MADCSM0011 is packaged in a
low cost 3mm 12-Lead PQFN package with an
exposed pad for improved high frequency
grounding.
M/A-COM designed the MADCSM0011 for handsets
requiring wide dynamic range and low power
consumption. A mode switch is incorporated into
the MADCSM0011 to switch between CDMA and
AMPs operation.
The MADCSM0011 is fabricated using M/A-COM’s
0.5-micron low noise E/D GaAs MESFET process.
The process features full passivation for increased
performance and reliability.
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Pin Configuration
Pin No. Pin Name
1
2
3
4
5
6
MIX
GND
LO IN
GND
LOA V
DD
IFA SRC
CDMA IF
OUT
GND
AMPS IF
OUT
MODE SEL
IFA V
DD
IFA IN
Description
Mixer RF Input/Mixer IF Output
DC and RF Ground
Local oscillator input (-10 to -5 dBm)
DC and RF Ground
LOA supply voltage;
RF bypassing required
Parallel RC network determines the
IFA Current, Gain and IIP3
CDMA IF Output of downconverter;
IF matching required
DC and RF Ground
AMPs IF Output of downconverter;
IF matching required
Selects between AMPs and CDMA
IF Output
IFA supply voltage; RF bypassing re-
quired
IFA Input
Ordering Information
Part Number
MADCSM0011
MADCSM0011TR
MADCSM0011SMB
1
Package
Bulk Packaging
Tape and Reel (1K Reel)
Sample Test Board
7
8
9
10
11
12
1. Reference Application Note M513 for reel size information.
Absolute Maximum Ratings
2,3
Parameter
Voltage
Input Power
Operating Temperature
Storage Temperature
Absolute Maximum
6V
0 dBm
-30°C to +85°C
-65°C to +150°C
1
2. Exceeding any one or combination of these limits may cause
permanent damage to this device.
3. M/A-COM does not recommend sustained operation near
these survivability limits.
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Dual Mode Cellular Downconverter
869 - 893 MHz
Electrical Specifications
4
:
MADCSM0011
V2
Test Conditions: V
DD
= 3.0 V, RF = 880 MHz, IF = 85 MHz, LO = 965 MHz, T
A
= +25°C
Parameter
Conversion Gain
Noise Figure
Input Intercept Point
Return Loss
Isolation
I
DD
4. All measurements are for both output modes.
Test Conditions
LO Pin = -10 dBm
LO Pin = -10 dBm
LO Pin = -10 dBm
RF, LO Pin = -10 dBm
LO, LO Pin = -10 dBm
RF to IF, LO Pin = -10 dBm
LO to IF, LO Pin = -10 dBm
LO Pin = -10 dBm
Units
dB
dB
dBm
dB
dB
dB
dB
mA
Min
10
—
6
—
—
25
18
—
Typ
12.5
7.5
8
12
13
36
21
12
Max
15
—
—
—
—
—
—
15
Recommended PCB Configuration
External Circuitry Parts List
Part
C1
C2
C3,C5,
C10,C12
C4
C6,C8
C7,C9
C11
Value
2.7 pF
1000 pF
0.1 µF
0.1 µF
33 pF
12 pF
0.1 µF
16 nH
270 nH
15 nH
15 nH
150 nH
34 Ohms
Case
Size
0402
0402
0402
0402
0402
0402
0402
0603
0603
0603
0603
0603
0402
Purpose
Mixer Input RF Matching
Mixer to IFA Matching
V
DD
Bypass
IFA Source Bypass
IFA Output Matching
IFA Output Matching
Vmode Bypass
Mixer Input RF Matching
Mixer to IFA Matching
LOA Input Matching
LOA Matching
IFA Output Matching
IFA Source Resistor
Sample Board Schematic
L1
L2
L3
L4
L5,L6
R1
2
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Dual Mode Cellular Downconverter
869 - 893 MHz
MADCSM0011
V2
Operating Instructions
M/A-COM’s MADCSM0011 is a highly integrated
MMIC dual mode downconverter for operation in
the 800-900 MHz Cellular frequency band. The
downconverter provides exceptional RF
performance while consuming low DC current and
is packaged in a low cost plastic package. It is
ideal for lightweight battery operated portable radio
systems.
The MADCSM0011 consists of a single-ended
mixer, an LO buffer amplifier, a single-ended IF
amplifier and a mode switch. Surface mount
resistors, inductors and capacitors are used in
conjunction with the downconverter to optimize the
trade-offs among performance, tunability and ease
of use. The sample board schematic shows the
downconverter and required off-chip components.
The mixer is a single-ended mixer that provides
exceptional linearity and isolation with low loss and
no DC current. An off-chip inductor (L2) and
capacitor (C2) are required to match the output of
the mixer to the input of the IF buffer amplifier.
The IF output is selected by the mode switch. Each
output port is the open drain of the IF buffer
amplifier. This allows maximum flexibility of the
intermediate frequency and IF filter. A matching
network such as that shown herein can be used to
match to 50 ohms from the output impedance of
the buffer to the input impedance of the filter at the
85.38 MHz intermediate frequency. The inductor
also acts as a choke for the DC supply line.
Elements L5, C6 and C7 (CDMA mode) and L6, C8
and C9 (AMPS mode) provide the necessary
impedance transformations.
The LO input port is matched on-chip to 50 ohms.
An LO buffer amplifier amplifies the –10 dBm input
signal to the level required to drive the mixer. The
performance is optimum with a drive level of –7
dBm.
All DC supply lines must be properly bypassed at
RF frequencies to obtain optimum performance
and at a lower frequency to maintain unconditional
stability. Capacitors C3, C4, C5, C10, C11 and
C12 are RF bypass capacitors for the IFA and
LOA. The value and placement of these capacitors
is critical in determining the frequency
response of these amplifiers.
3
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Dual Mode Cellular Downconverter
869 - 893 MHz
Typical Performance Curves vs. Temperature
Conversion Gain
14
MADCSM0011
V2
Input IP3
14
-30°C
+25°C
+85°C
12
13
10
12
8
6
11
-30°C
+25°C
+85°C
4
10
860
870
880
890
900
2
860
870
880
890
900
Frequency (MHz)
Frequency (MHz)
Noise Figure
9
RF Return Loss
0
-30°C
+25°C
+85°C
8
-5
7
-10
6
-30°C
+25°C
+85°C
-15
5
860
870
880
890
900
-20
860
870
880
890
900
Frequency (MHz)
Frequency (MHz)
LO Return Loss
0
IF Return Loss
0
-30°C
+25°C
+85°C
-5
-5
-10
-10
-15
-15
-30°C
+25°C
+85°C
-20
-20
300
-25
500
700
900
1100
1300
1500
50
70
90
110
130
150
Frequency (MHz)
4
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
Frequency (MHz)
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Dual Mode Cellular Downconverter
869 - 893 MHz
Typical Performance Curves vs. Temperature
Isolation
40
MADCSM0011
V2
30
RF-to-IF
LO-to-IF
LO-to-RF
Handling Procedures
Please observe the following precautions to avoid
damage:
20
Static Sensitivity
10
Gallium Arsenide Integrated Circuits are sensitive to
electrostatic discharge (ESD) and can be damaged by
static electricity. Proper ESD control techniques should
be used when handling these devices.
870
880
890
900
0
860
Frequency (MHz)
3 mm 12-Lead PQFN
†
†
Meets JEDEC moisture sensitivity level 1 requirements.
5
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
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