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Dual Mode Cellular Downconverter 869 - 893 MHz
Features
* * * * * * * * 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

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.
Pin Configuration
Pin No. Pin Name
1 2 3 4 5 6 MIX GND LO IN GND LOA VDD IFA SRC CDMA IF OUT GND AMPS IF OUT MODE SEL IFA VDD 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 required IFA Input
Ordering Information1
Part Number
MADCSM0011 MADCSM0011TR MADCSM0011SMB
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 -30C to +85C -65C to +150C
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 Specifications4:
MADCSM0011 V2
Test Conditions: VDD = 3.0 V, RF = 880 MHz, IF = 85 MHz, LO = 965 MHz, TA = +25C
Parameter
Conversion Gain Noise Figure Input Intercept Point Return Loss Isolation IDD 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 F 0.1 F 33 pF 12 pF 0.1 F 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 VDD 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
-30C +25C +85C
12
13
10
12
8
6
11
-30C +25C +85C
4
10 860
870
880
890
900
2 860
870
880
890
900
Frequency (MHz)
Frequency (MHz)
Noise Figure
9
RF Return Loss
0
-30C +25C +85C
8
-5
7
-10
6
-30C +25C +85C
-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
-30C +25C +85C
-5
-5
-10
-10
-15
-15
-30C +25C +85C
-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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