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19-1583; Rev 1; 12/99
MAX2651/MAX2652/MAX2653 Evaluation Kits
General Description
The MAX2651/MAX2652/MAX2653 evaluation kits (EV kits) simplify evaluation of the MAX2651/MAX2652/MAX2653 low-noise amplifiers (LNAs). The kits enable testing of the devices' RF performance and require no additional support circuitry. The signal inputs and outputs use SMA connectors to facilitate the connection of RF test equipment. The MAX2651/MAX2652 EV kits are assembled with a MAX2651/MAX2652 and incorporate input and output matching components optimized for RF frequencies of 925MHz to 960MHz (GSM band) and 1805MHz to 1880MHz (DCS band). The MAX2653 EV kit is assembled with a MAX2653 and incorporates input and output matching components optimized for the DCS band.
Features
o Easy Evaluation of MAX2651/MAX2652/MAX2653 o +2.7V to +3.3V Single-Supply Operation o GSM RF Input/Output Matched to 50 at 925MHz to 960MHz (MAX2651/MAX2652) o DCS RF Input/Output Matched to 50 at 1805MHz to 1880MHz o All Peripheral Components Included
Evaluate: MAX2651/MAX2652/MAX2653
Component Suppliers
SUPPLIER Coilcraft PHONE 847-639-6400 800-368-4923 219-489-1533 800-241-6574 FAX 847-639-1469 507-835-8356 219-489-2261 770-436-3030 WEB www. coilcraft.com www. efjohnson.com www. kamaya.com www. murata.com www. T-Yuden.com
Ordering Information
PART MAX2651EVKIT MAX2652EVKIT MAX2653EVKIT TEMP. RANGE -40C to +85C -40C to +85C -40C to +85C IC PACKAGE 10 MAX 10 MAX 8 MAX
EF Johnson Kamaya Murata Electronics
Taiyo Yuden 408-573-4150 408-573-4159
MAX2651 EV Kit Component List
DESIGNATION QTY C1 C2 C3 C4, C5, C11 C6 C7, C8 C9 C10 C12 C13 DCSIN, DCSOUT, GSMIN, GSMOUT 1 1 1 3 1 0 1 1 1 1 DESCRIPTION 68pF 5% ceramic capacitor (0603) Murata GRM39COG680J50 15pF 5% ceramic capacitor (0603) Murata GRM39COG150J50 1.5pF 0.1pF ceramic capacitor (0603) Murata GRM39COG1R5B50 220pF 5% ceramic capacitors (0603) Murata GRM39COG221J50 1.2pF 0.1pF ceramic capacitor (0603) Murata GRM39COG1R2B50 Not installed 2.2pF 0.1pF ceramic capacitor (0603) Murata GRM39COG2R2B50 100pF 5% ceramic capacitor (0603) Murata GRM39COG101J50V 0.01F 10% ceramic cap (0805) 47pF 5% ceramic capacitor (0603) Murata GRM39COG470J50 SMA connectors (PC edge mount) EF Johnson 142-0701-801 R3 R5 U1 None None None 4 1 1 1 1 1 1 DESIGNATION QTY L1, L5 L2 L4 R1, R4 R2 2 1 1 2 1 DESCRIPTION 8.2nH 5% air-core inductors (0603) Murata LQG11A8N2J00 3.9nH 0.3nH inductor (0603) Murata LQG11A3N9S00 2.2nH 0.3nH inductor (0603) Murata LQG11A2N2S00 910 5% resistors (0603) Kamaya RMC16911JT 330 5% resistor (0603) Kamaya RMC16331JT 180 5% resistor (0603) Kamaya RMC16181JT 0 resistor (0402) Kamaya RMC16S000JT MAX2651EUB MAX2651 EV kit PC board MAX2651 data sheet MAX2651 EV kit data sheet
________________________________________________________________ Maxim Integrated Products
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
MAX2652 EV Kit Component List
DESIGNATION QTY BAND, GAIN, GND, SHDN, VCC, C1, C5, C6, C12 C2 C3 C4 C7 C8, C13 C9 C10 C11 5 DESCRIPTION Test points Mouser 151-203 220pF 5% ceramic capacitors (0603) Murata GRM39COG221J050 or Taiyo Yuden UMK107CH221JZ 68pF 5% ceramic capacitor (0603) Murata GRM39COG680J050 or Taiyo Yuden UMK107CH680JZ 5.6pF 0.25pF ceramic capacitor (0603) Murata GRM39COG5R6C050 1.1pF 0.1pF ceramic capacitor (0603) Murata GRM40X7R105K010 1.2pF 0.1pF ceramic capacitor (0603) Murata GRM39COG1R2B050 Not installed 1F 10% MAX ceramic capacitor (0805) Murata GRM39COG2R2B50 or Taiyo Yuden LMK212BJ105KG 2.2pF 0.1pF ceramic capacitor (0603) Murata GRM39COG2R2B050 100pF 5% ceramic capacitor (0603) Murata GRM39COG101J050 or Taiyo Yuden UMK107CH101JZ C14 DCSIN, DCSOUT, GSMIN, GSMOUT JU1, JU2, JU3 L1 L2 L4 L5 R1, R2, R5 R3 R4 R6 U1 None None None None 1 47pF 5% ceramic capacitor (0603) Murata GRM39COG470J050 or Taiyo Yuden UMK107CH470JZ SMA connectors (PC edge mount) EF Johnson 142-0701-801 or Digi-Key J502-ND 3-pin headers 6.8nH 5% inductor (0603) Murata LQG11A6N8J00 3.3nH 0.3nH inductor (0603) Murata LQG11A3N3S00 2.2nH 0.3nH inductor (0603) Murata LQG11A2N2S00 8.2nH 5% inductor (0603) Murata LQG11A8N2J00 910 5% resistors (0603) Not installed 240 5% resistor (0603) 0 5% resistor (0402) MAX2652EUB (10 MAX) Shunts (JU1, JU2, JU3) MAX2652 EV kit PC board MAX2652 data sheet MAX2652 EV kit data sheet
4 3 1 1 1 1 3 0 1 1 1 3 1 1 1
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1 1 1 1 0 1 1 1
MAX2653 EV Kit Component List
DESIGNATION QTY C1, C7 C2 C3 C4 C5, C8 C6 C9 C10 2 1 1 1 0 1 1 1 DESCRIPTION 100pF 5% ceramic capacitors (0603) Murata GRM39COG101J50 1.5pF 0.1pF ceramic capacitor (0603) Murata GRM39COG1R5B50 47pF 5% ceramic capacitor (0603) Murata GRM39COG470J50 1.0pF0.1pF ceramic capacitor (0603) Murata GRM39COG010B50 Not installed 150pF 5% ceramic capacitor (0805) Murata GRM40COG151J50 2200pF 5% ceramic capacitor (0603) Murata GRM39X7R222J50 0.01F 5% ceramic capacitor (0603) Murata GRM39X7R103J50 DESIGNATION QTY DCSIN, DCSOUT L1 L3 R1, R3 R2 R4 U1 None None None 1 1 1 2 1 1 1 1 1 1 DESCRIPTION SMA connector (PC edge mount) EF Johnson 142-0701-801 3.3nH 0.3nH inductor (0603) Murata LQG11A3N3S00 2.7nH 0.3nH inductor (0603) Murata LQG11A2N7S00 1k 5% resistors (0603) Kamaya RMC16102JT 330 5% resistor (0603) Kamaya RMC16331JT 0 resistor (0603) Kamaya RMC16000JT MAX2653EUA MAX2653 EV kit PC board MAX2653 data sheet MAX2653 EV kit data sheet
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MAX2651/MAX2652/MAX2653 Evaluation Kits
Test Equipment Required
This section lists the required test equipment to verify operation of the MAX2651/MAX2652/MAX2653. It is intended as a guide only; some substitutions are possible. * An RF signal generator capable of delivering at least 0dBm of output power up to 2.5GHz (HP 8648C or equivalent) * An RF spectrum analyzer that covers the operating frequency range plus a few harmonics (HP 8561E, for example) A power supply capable of up to 25mA at +2.7V to +3.3V An optional ammeter for measuring the supply current Two 50 SMA cables A noise-figure meter (HP 8970B, for example) to measure noise figure (optional) A network analyzer (HP 8753D, for example) to measure return loss and gain (optional) 5) For the MAX2651/MAX2652 EV kits only, connect a jumper wire between the EV kit's BAND input and VCC (DCS mode). 6) Turn on the DC supply. If using an ammeter, the supply current should read approximately 5.7mA for the MAX2651, 7.0mA for the MAX2652, and 5.4mA for the MAX2653. 7) Activate the RF generator's output. A signal on the spectrum analyzer's display should indicate a typical gain of 18dB for the MAX2651/MAX2653 and 17dB for the MAX2652 after accounting for cable, board, and connector losses. (Board and connector loss correction is typically 0.3dB for the DCS gain test.) Low-Gain Mode 8) Deactivate the signal generator's output. Remove the jumper wire between the GAIN input and VCC, and reconnect the jumper wire between the GAIN input and ground (low-gain mode). If using a current meter, the supply current should now read approximately 2.2mA 9) Activate the RF generator's output. A signal on the spectrum analyzer's display should indicate a typical gain of -2dB after accounting for cable and board losses. 10) Another method for determining gain is to use a network analyzer. This has the advantage of displaying gain over a swept frequency band, in addition to displaying input and output return loss. Refer to the network analyzer manufacturer's user manual for setup details (optional).
Evaluate: MAX2651/MAX2652/MAX2653
* * * * *
Connections and Setup
The MAX2651/MAX2652/MAX2653 EV kits are fully assembled and factory tested. This section provides a step-by-step guide to operating the EV kits and testing the devices' functions. Do not turn on the DC power or RF signal generator until all connections are made.
Checking Power Gain (DCS Band)
For the MAX2651/MAX2652 EV kits, ensure that the GSMIN and GSMOUT ports are terminated into 50. High-Gain Mode 1) Connect a +3VDC supply (through an ammeter if desired) to the EV kit's VCC and GND terminals. Do not turn on the supply. 2) Connect an RF signal generator to the DCSIN SMA connector; do not turn on the generator's output. Set the generator for an output frequency of 1850MHz at a power level of -30dBm. 3) Connect a spectrum analyzer to the EV kit's DCSOUT SMA connector. Set the analyzer to a center frequency of 1850MHz, a total span of 200MHz, and a reference level of 0dBm. 4) Connect a jumper wire between the EV kit's GAIN input and VCC (high-gain mode).
Checking Power Gain (GSM Band, MAX2651/MAX2652 EV Kits Only)
Ensure that the DCSIN and DCSOUT ports are terminated into 50. High-Gain Mode 1) Connect a +3VDC supply (through a current meter if desired) to the EV kit's VCC and GND terminals. Do not turn on the supply. 2) Connect an RF signal generator to the GSMIN SMA connector; do not turn on the generator's output. Set the generator for an output frequency of 945MHz at a power level of -30dBm. 3) Connect a spectrum analyzer to the EV kit's GSMOUT SMA connector. Set the analyzer to a center frequency of 945MHz, a total span of 200MHz, and a reference level of 0dBm.
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
4) Connect a jumper wire between the EV kit's GAIN input and VCC (high-gain mode). 5) Connect a jumper wire between the EV kit's BAND input and ground (GSM mode). 6) Turn on the DC supply. If using an ammeter, the supply current should read approximately 5.9mA for the MAX2651 and 7.2mA for the MAX2652. 7) Activate the RF generator's output. A signal on the spectrum analyzer's display should indicate a typical gain of 18dB after accounting for cable and board losses. (Board and connector loss correction is typically 0.3dB for the GSM gain test.) Low-Gain Mode 8) Deactivate the signal generator's output. Remove the jumper wire between the GAIN input and VCC, and reconnect the jumper wire between the GAIN input and ground (low-gain mode). If using a current meter, the supply current should now read approximately 2.2mA for the MAX2651 and 2.4mA for the MAX2652. 9) Activate the RF generator's output. A signal on the spectrum analyzer's display should indicate a typical gain of -2dB after accounting for cable and board losses. 10) Another method for determining gain is to use a network analyzer. This has the advantage of displaying gain over a swept frequency band, in addition to displaying input and output return loss. Refer to the network analyzer manufacturer's user manual for setup details (optional).
Checking Noise Figure
Noise-figure measurements on low-noise devices are extremely sensitive to board and lab setup losses/parasitics. The specified MAX2651/MAX2652/MAX2653 noisefigure values (refer to the MAX2651/MAX2652/MAX2653 data sheet) have board and connector losses subtracted out. (Board and connector loss correction is typically 0.1dB for the DCS band noise figure test and is negligible for GSM.) There are many techniques/precautions for measuring a noise figure. A detailed explanation of these items goes beyond the scope of this document. For more information on how to perform this level of noise-figure measurement, refer to the noise-figure meter's operating manual as well as Hewlett Packard Application Note #57-1.
Layout Considerations
A good PC board is an essential part of an RF circuit design. The EV kit PC board can serve as a guide for laying out a board using the MAX2651/MAX2652/MAX2653. Each VCC node on the PC board should have its own decoupling capacitor. This minimizes supply coupling from one section of the IC to another. A star topology for the supply layout, in which each VCC node on the circuit has a separate connection to a central VCC node, can further minimize coupling between sections of the IC.
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
R4 910 C11 220pF 9 R3 180 C10 100pF 8 L5 8.2nH C8 OPEN 7 R2 330 6 L4 2.2nH C5 220pF C6 1.2pF VCC R5 0 C7 OPEN VCC C12 0.01F SMA DCSOUT VCC GAIN C9 2.2pF SMA GSMOUT
1
GND
GAIN
10
SMA GSMIN
C2 15pF
C1 68pF 2 L1 8.2nH GSMIN GSMOUT
U1 MAX2651
3 GND VCC
SMA DCSIN
C13 47pF C3 1.5pF
L2 3.9nH
4
DCSIN
DCSOUT
BAND R1 910
5 C4 220pF
BAND
GND
Figure 1. MAX2651 EV Kit Schematic
1.0"
1.0"
Figure 2. MAX2651 EV Kit Component Placement Guide
Figure 3. MAX2651 EV Kit PC Board Layout--Component Side
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
1.0"
1.0"
Figure 4. MAX2651 EV Kit PC Board Layout--Ground Plane 1
Figure 5. MAX2651 EV Kit PC Board Layout--Ground Plane 2
1.0"
Figure 6. MAX2651 EV Kit PC Board Layout--Solder Side
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
VCC ON OFF SMA GSMIN C3 5.6pF 2 C2 68pF GSMIN GSMOUT 9 R4 240 VCC L5 8.2nH VCC 8 C13 OPEN (0402) 7 R3 OPEN 6 L4 2.2nH C6 220pF C7 1.2pF VCC R6 0 (0402) C8 OPEN (0402) C9 1F C11 100pF R1 910 C1 220pF R5 910 C12 220pF C10 2.2pF SMA GSMOUT VCC HIGH LOW
JU1
1
SHDN
GAIN
10
JU3
L1 6.8nH
U2 MAX2652
3 GND
VCC
SMA DCSIN VCC DCS GSM
C14 47pF C4 1.1pF
L2 3.3nH
4
DCSIN
DCSOUT
SMA DCSOUT
JU2 R2 910 C5 220pF
5
BAND
GND
Figure 7. MAX2652 EV Kit Schematic
1.0"
1.0"
Figure 8. MAX2652 EV Kit Component Placement Guide
Figure 9. MAX2652 EV Kit PC Board Layout--Component Side
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
1.0"
1.0"
Figure 10. MAX2652 EV Kit PC Board Layout--Ground Plane 1
Figure 11. MAX2652 EV Kit PC Board Layout--Ground Plane 2
1.0"
Figure 12. MAX2652 EV Kit PC Board Layout--Solder Side
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
R1 1k SHDN C1 100pF
1
SHDN
GAIN
8 C7 100pF 7 C8 OPEN 6 R2 330 5 L3 2.7nH
R3 1k GAIN
U2
2 GND
MAX2653
VCC
SMA DCSIN
C9 2200pF C2 1.5pF
R4 0
C5 OPEN
C6 150pF
C10 0.01F
VCC
L1 3.3nH
3
DCSIN
DCSOUT
SMA DCSOUT C4 1pF VCC C3 47pF
4
GND
GND
Figure 13. MAX2653 EV Kit Schematic
1.0"
1.0"
Figure 14. MAX2653 EV Kit Component Placement Guide
Figure 15 MAX2653 EV Kit PC Board Layout--Component Side
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
1.0"
1.0"
Figure 16. MAX2653 EV Kit PC Board Layout--Ground Plane 1
Figure 17. MAX2653EV Kit PC Board Layout--Ground Plane 2
1.0"
Figure 18. MAX2653 EV Kit PC Board Layout--Solder Side
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
NOTES
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MAX2651/MAX2652/MAX2653 Evaluation Kits Evaluate: MAX2651/MAX2652/MAX2653
NOTES
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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