19-2205; Rev 0; 10/01 MAX2385/MAX2386 Evaluation Kits Features ♦ +2.7V to +3.6V Operation ♦ 50Ω SMA Inputs and Outputs on RF, IF, and LO Ports for Easy Testing ♦ All Matching Components Included ♦ Fully Assembled and Tested Ordering Information PART TEMP. RANGE IC PACKAGE MAX2385EVKIT -40°C to +85°C 5 ✕ 4 UCSP™ MAX2386EVKIT -40°C to +85°C 5 ✕ 4 UCSP™ Component List DESIGNATION QTY DESCRIPTION C1, C42 2 1000pF ±10% ceramic capacitors (0402) Murata GRM36X7R102K050A C3, C4, C39, C40 4 7.0pF ±0.1pF ceramic capacitors (0402) Murata GRM36COG070B050A C5, C6, C13, C37, C38 5 0.5pF ±0.1pF ceramic capacitors (0402) Murata GRM36COG0R5B050A C7, C8, C22, C24, C30, C34, C35 7 100pF ±5% ceramic capacitors (0402) Murata GRM36COG101J050A C9, C26 2 0.01µF 10% ceramic capacitors (0402) Murata GRM36X7R103K016A 1 3.0pF ±0.1pF ceramic capacitor (0402) Murata GRM36COG030B050A C12 6.8nF ±10% ceramic capacitors Murata GRM36COG682B050A DESIGNATION QTY DESCRIPTION C27 1 22µF ±10% tantalum capacitor, C case AVX TAJC226K016 C28 1 1.8pF ±0.1pF ceramic capacitor (0402) Murata GRM36COG1R8B050A J1, J2, J3, J5, J9, J11, J12 7 SMA edge mounts EFJohnson 142-0701-801 J4, J7, J10 3 SMA PC mounts EFJohnson 142-0701-201 JU1, JU2, JU3, JU8 4 1 ✕ 2 headers (0.1in centers) Digi-Key S1012-36-ND JU4–JU7 4 1 ✕ 3 headers (0.1in centers) Digi-Key S1012-36-ND JU1–JU9 9 Shunts Digi-Key S9000-ND L2, L3, L10, L11 4 180nH 5% inductors Toko 1608-FSR18J L4 1 2.7nH ±0.3nH inductor Toko 1608-FS2N7S C16, C23, C29, C33 4 C19 1 2.2pF ±0.1pF ceramic capacitor (0402) Murata GRM36COG2R2B050A L5, L6 2 5.6nH ±0.3nH inductors Toko 1608-FS5N6S C25, C32 2 2.0pF ±0.1pF ceramic capacitors Murata GRM36COG020B050A L7 1 22nH ±2% inductor Murata LQW1608A22NG00 L8 1 3.9nH ±0.3nH inductor Toko 1608 FS3N9S UCSP is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluate: MAX2385/MAX2386 General Description The MAX2385/MAX2386 evaluation kits (EV kits) simplify evaluation of the MAX2385/MAX2386. The EV kits allow the evaluation of the CDMA and GPS low-noise amplifiers (LNA), as well as the CDMA and GPS downconverter mixers, without the use of any additional support circuitry. The signal inputs and outputs use SMA connectors to simplify the connection of RF test equipment. The MAX2385/MAX2386 EV kits are assembled with an associated IC and incorporate input and output matching components optimized for RF frequencies from 832MHz to 870MHz and an IF frequency of 110MHz. Evaluate: MAX2385/MAX2386 MAX2385/MAX2386 Evaluation Kits Component List (continued) DESIGNATION QTY DESCRIPTION L9 1 10nH ±2% inductor Murata LQW1608A10NG00 R2, R3, R4, R10 4 0Ω ±1% resistors (0402) R5 1 47.5kΩ ±1% resistor (0402) R6, R7 2 69.8Ω ±1% resistors (0402) R8 1 20kΩ ±1% resistor (0402) T1, T2 2 Transformers Macom ETC1-1T U1 1 MAX2385EBP/MAX2386EBP 5 ✕ 4 UCSP VCC, GND, TP1 3 Test points Digi-Key 5000K-ND Component Suppliers PHONE FAX AVX SUPPLIER 843-448-9411 843-448-1943 Murata 770-436-1300 770-436-3030 Toko 408-432-8281 408-943-9790 Quick Start The MAX2385/MAX2386 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. Test Equipment Required Table 1 lists the required test equipment to verify MAX2385/MAX2386 operation. It is intended as a guide only, and some substitutions are possible. Table 1. Required Test Equipment EQUIPMENT DESCRIPTION Connections and Setup This section provides a step-by-step guide to operating the EV kits and testing the devices’ functions. Ensure that the shunts across jumpers ICLNA (JU1), IGLNA (JU2), ICMIX (JU8), and IGMIX (JU3) are installed. Do not turn on DC power or RF signal generators until all connections are made. Testing the Supply Current 1) Connect a DC supply set to +2.75V (through an ammeter, if desired) to the VCC and GND terminals on the EV kit. If available, set the current limit to 40mA. Do not turn on the supply. 2) Set the shunt across BUFF (JU7) to OFF. See Table 2 for positions of the shunts across G1, G2, and MODE for the different modes of operation. 3) Turn on the DC supply; the supply current should read approximately 0mA (shutdown mode), 9.6mA (GPS mode, MAX2385), 16.9mA (GPS mode, MAX2386), 3.7mA (ULG mode), 6.5mA (LG mode), 10.3mA (MG mode), 12.5mA (HGLL mode), and 17.4mA (HGHL mode). 4) Set the shunt across BUFF (JU7) to ON. This should increase the current consumption in each mode by 5.2mA. Testing the CDMA LNA 1) Connect a DC supply set to +2.75V (through an ammeter if desired) to the VCC and GND terminals on the EV kit. If available, set the current limit to 40mA. Do not turn on the supply. 2) See Table 2 for positions of the shunts across G1, G2, and MODE for the different CDMA LNA modes. 3) Connect one RF signal generator to the CLNAIN SMA connector. Do not turn on the generator’s output. Set the generator to an output frequency of 851MHz and set the generator power level to -30dBm. 4) Connect the spectrum analyzer to the CLNAOUT SMA connector. Set the spectrum analyzer to a center frequency of 851MHz and a total span of 10MHz. RF Signal Generators Capable of delivering at least 0dBm of output power up to 1.6GHz (HP 8648C or equivalent) RF Spectrum Analyzer Capable of covering the operating frequencies of the device, as well as a few harmonics (HP 8561E or equivalent) Power Supply Capable of up to 40mA at +2.7V to +3.6V Power Meter Capable of measuring up to 20dBm Ammeter To measure supply current (optional) 5) Turn on the DC supply, then activate the RF generator’s output. An 851MHz signal shown on the spectrum analyzer display should indicate a magnitude of approximately -15dBm (HGHL mode), -16dBm (HGLL mode), -29dBm (MG mode), and -35dBm (LG mode). Be sure to account for cable losses (between 0.5dB and 2dB) and circuit board losses (approximately 0.5dB) when computing gain and noise figure. Network Analyzer To measure small-signal return loss and gain (optional, HP 8753D or equivalent) 6) (Optional) Another method for determining gain is by using a network analyzer. This has the advantage of 2 _______________________________________________________________________________________ MAX2385/MAX2386 Evaluation Kits MODES FUNCTION CONTROL PINS LNA MIXER G1 G2 MODE HGHL HGLL MG LGHL GPS HG MG LG ULG GPS High Gain, High Linearity (HGHL) 0 0 1 ● — — — — ● — — — — High Gain, Low Linearity (HGLL) 1 1 0 — ● — — — ● — — — — ● — — — ● — — ● — — — ● — — Midgain (MG) 1 0 1 — — Low Gain (LG) 1 1 1 — — Ultra-Low Gain (ULG) 1 0 0 — — — ● — — — — ● — GPS 0 1 1 — — — — ● — — — — ● Shutdown (SHDN) 0 X — — — — — — — — — — — 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. 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. Testing the GPS LNA 1) Connect a DC supply set to +2.75V (through an ammeter, if desired) to the VCC and GND terminals on the EV kit. If available, set the current limit to 40mA. Do not turn on the supply. Testing the CDMA Mixer 1) Connect a DC supply set to +2.75V (through an ammeter if desired) to the VCC and GND terminals on the EV kit. If available, set the current limit to 40mA. Do not turn on the supply. 2) Set the shunt across MODE to HI, across G1 to LO, and across G2 to HI. This places the device in GPS mode (see Table 2). 2) See Table 2 for positions of the shunts across G1, G2, and MODE for the different CDMA mixer modes. 3) Connect one RF signal generator to the GLNAIN SMA connector. Do not turn on the generator’s output. Set the generator to an output frequency of 1575.42MHz and set the generator power level to -30dBm. 4) Connect the spectrum analyzer to the GLNAOUT SMA connector. Set the spectrum analyzer to a center frequency of 1575.42MHz and a total span of 10MHz. 5) Turn on the DC supply and activate the RF generator’s output. A 1575.42MHz signal shown on the spectrum analyzer display should indicate a magnitude of approximately -12dBm (MAX2385) or -10dBm (MAX2386). Be sure to account for cable losses (between 0.5dB and 2dB) and circuit board losses (approximately 0.5dB) when computing gain and noise figure. 6) (Optional) Another method for determining gain is by using a network analyzer. This has the advantage of 3) Connect one RF signal generator to the LO_IN SMA connector. Do not turn on the generator output. Set the frequency to 1482MHz, and output power to -10dBm. This is the LO signal. 4) Connect another RF signal generator to the CMIXIN SMA connector. Do not turn on the generator output. Set the signal generator to 851MHz and output power level to -30dBm. 5) Connect the spectrum analyzer to the CIF SMA connector. Set the spectrum analyzer to a center frequency of 110MHz and a total span of 10MHz. 6) Turn on the DC supply and the signal generator outputs. 7) A 110MHz signal shown on the spectrum analyzer display should indicate a magnitude of approximately -19dBm (HGHL/HGLL mode), -19dBm (MG mode), -20dBm (LG mode), or -27dBm (ULG mode). Be sure to account for cable losses (between 0.5dB and 2dB) and circuit board losses (approximately 0.5dB) when computing gain and noise figure. _______________________________________________________________________________________ 3 Evaluate: MAX2385/MAX2386 Table 2. Mode Selection Truth Table Evaluate: MAX2385/MAX2386 MAX2385/MAX2386 Evaluation Kits Testing the GPS Mixer 1) Connect a DC supply set to +2.75V (through an ammeter, if desired) to the VCC and GND terminals on the EV kit. If available, set the current limit to 40mA. Do not turn on the supply. 2) Set the shunt across MODE to HI, across G1 to LO, and across G2 to HI. This places the device in GPS mode (see Table 2). 3) Connect one RF signal generator to the LO_IN SMA connector. Do not turn on the generator output. Set the frequency to 1465.42MHz, and output power to -10dBm. This is the LO signal. 4) Connect another RF signal generator to the GMIXIN SMA connector. Do not turn on the generator output. Set the signal generator to 1575.42MHz and output power level to -30dBm. 5) Connect the spectrum analyzer to the GIF SMA connector. Set the spectrum analyzer to a center frequency of 110MHz and a total span of 10MHz. 6) Turn on the DC supply and the signal generator outputs. 7) A 110MHz signal shown on the spectrum analyzer display should indicate a magnitude of approximately -18dBm (MAX2385) or -17dBm (MAX2386). Be sure to account for cable losses (between 0.5dB and 2dB) and circuit board losses (approximately 0.5dB) when computing gain and noise figure. Testing the LO Output Buffer 1) Connect a DC supply set to +2.75V (through an ammeter, if desired) to the VCC and GND terminals 4 on the EV kit. If available, set the current limit to 40mA. Do not turn on the supply. 2) Set the shunt across jumper BUFF (JU7) to ON. 3) Connect one RF signal generator to the LO_IN SMA connector. Do not turn on the generator output. Set the frequency to 1482MHz, and output power to -10dBm. 4) Connect the spectrum analyzer to the LO_OUT SMA connector. Set the spectrum analyzer to a center frequency of 741MHz and a total span of 10MHz. 5) Turn on the DC supply and the signal generator outputs. 6) A 741MHz signal shown on the spectrum analyzer display should indicate a magnitude of approximately -14dBm. Be sure to account for cable losses (between 0.5dB and 2dB), the 7.4dB 100Ω to 50Ω matching pad, and circuit board losses (approximately 0.5dB) when computing gain and noise figure. Layout The EV kit’s PC board can serve as a guide for laying out a circuit board using the MAX2385/MAX2386. Keep RF signal lines as short as possible to minimize losses and radiation. Always use controlled-impedance lines on all high-frequency inputs and outputs and use low-inductance connections to ground on all GND pins. At the mixer outputs, keep the differential lines together and of the same length to ensure signal balance. _______________________________________________________________________________________ MAX2385/MAX2386 Evaluation Kits Evaluate: MAX2385/MAX2386 VCC 2 JU3 1 VCC IGMIX J3 C1 1000pF 5 L2 180nH C5 0.5pF C7 100pF T1 1 C6 0.5pF JU4 1 HI 2 MODE LO 3 L5 5.6nH C4 7.0pF 2 4 L3 180nH R2 0Ω 3 L7 22nH 1 JU8 C8 100pF IGLNA C9 0.01µF C13 0.5pF C42 1000pF J11 2 ICMIX L4 2.7nH C37 0.5pF L10 180nH L11 180nH C38 0.5pF C35 100pF VCC 2 JU1 1 1 C39 7.0pF 2 A5 CMIXIN A3 LO_IN 4 C40 7.0pF C4 C24 100pF B4 C5 R6 69.8Ω D5 J12 R7 69.8Ω GND GND C2 L8 3.9nH GMIXIN B3 LO_OUT GLNAIN 5 B5 VCC D4 D1 CIF- MAX2385 G1 VCC C1 GND CIF+ D3 HI G1 2 LO 3 B2 R4 0Ω G2 1 RBIAS JU5 U1 CLNAOUT C3 B1 VCC T2 3 GLNAOUT CLNAIN A1 C22 100pF D2 C12 3pF MODE L6 5.6nH GIF- GIF+ A2 R3 0Ω A4 ICLNA C29 6.8nF J7 VCC 2 JU2 1 J5 C23 6.8nF C25 2.0pF VCC J1 J4 C19 2.2pF C3 7.0pF J2 C16 6.8nF R8 20kΩ C28 1.8pF VCC JU7 1 ON 2 BUFF OFF 3 C30 100pF J10 J6 TP1 R5 47.5kΩ J9 C33 6.8nF L9 10nH C32 2pF INDO603 C27 22µF C34 100pF C26 0.01µF J8 VCC R10 0Ω JU6 1 HI 2 G2 LO 3 Figure 1. MAX2385/2386 EV Kit Schematic _______________________________________________________________________________________ 5 Evaluate: MAX2385/MAX2386 MAX2385/MAX2386 Evaluation Kits 1.0" Figure 2. MAX2385/MAX2386 EV Kit Component Placement Guide—Component Side 1.0" Figure 3. MAX2385/MAX2386 EV Kit Component Placement Guide—Solder Side 6 1.0" Figure 4. MAX2385/MAX2386 EV Kit PC Board Layout—Ground Plane 1 1.0" Figure 5. MAX2385/MAX2386 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ MAX2385/MAX2386 Evaluation Kits 1.0" Figure 6. MAX2385/MAX2386 EV Kit PC Board Layout 1.0" Figure 8. MAX2385/MAX2386 EV Kit PC Board Layout— Component Side 1.0" Figure 7. MAX2385/MAX2386 EV Kit PC Board Layout Figure 9. MAX2385/MAX2386 EV Kit PC Board Layout—Solder Side 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Evaluate: MAX2385/MAX2386 1.0"