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| 19-1673 Rev 0; 9/00 MAX2605-MAX2609 Evaluation Kits General Description The MAX2605-MAX2609 evaluation kits (EV kits) simplify evaluation of this family of voltage-controlled oscillators (VCOs). These kits enable testing of the devices' performance and require no additional support circuitry. Both signal outputs use SMA connectors to facilitate connection to RF test equipment. These EV kits are fully assembled and tested. Their oscillation frequencies are set to approximately the midrange of the respective VCOs. o Easy Evaluation o Complete, Tunable VCO Test Board with Tank Circuit o Low Phase Noise o Fully Assembled and Tested Features Evaluate: MAX2605-MAX2609 Ordering Information PART MAX2605EVKIT MAX2606EVKIT MAX2607EVKIT MAX2608EVKIT MAX2609EVKIT TEMP. RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C IC PACKAGE 6 SOT23-6 6 SOT23-6 6 SOT23-6 6 SOT23-6 6 SOT23-6 Component Suppliers SUPPLIER AVX Coilcraft EFJohnson Murata PHONE 803-946-0690 847-639-6400 402-474-4800 FAX 803-626-3123 847-639-1469 WEBSITE avx-corp.com coilcraft.com murata.com 402-474-4858 efjohnson.com 814-237-1431 814-238-0490 MAX2605 Component List DESIGNATION QTY DESCRIPTION 1000pF 5% ceramic capacitors (0603) Murata GRM39COH102J025A or AVX 06035A102JAT2A 12pF 5% ceramic capacitors (0603) Murata GRM39COG120J050A 10F 10%, 16V tantalum capacitor AVX TAJC106K016 270 5% resistor (0603) Not installed 10 5% resistor (0603) Not installed 680nH inductors Coilcraft 1008CS-681XJBC 1.2H inductor Coilcraft 1206CS-122XJBC MAX2605EUT SMA connectors (edge mount) EFJohnson 142-0701-801 or Digi-Key J502-ND Test points Digi-Key 5000K-ND MAX2605/6/7 EV kit circuit board MAX2605-MAX2609 data sheet MAX2606 Component List DESIGNATION QTY DESCRIPTION 1000pF 5% ceramic capacitors (0603) Murata GRM39COH102J025A or AVX 06035A102JAT2A 4.7pF 0.25% ceramic capacitors (0603) Murata GRM39COG4R7C050A 10F 10%, 16V tantalum capacitor AVX TAJC106K016 270 5% resistor (0603) Not installed 10 5% resistor (0603) Not installed 270nH 2% inductor Coilcraft 1008CS-271XJBC 330nH inductor Coilcraft 1008CS-331XJBC MAX2606EUT SMA connectors (edge mount) EFJohnson 142-0701-801 or Digi-Key J502-ND Test points MAX2605/6/7 EV kit circuit board MAX2605-MAX2609 data sheet C1, C4 2 C1, C4 2 C2, C3 2 C2, C3 2 C5 R1 R2, R3 R4 L1, L2 L4, L5 L3 U1 J1, J2 VCC,GND, TUNE None None 1 1 2 1 2 2 1 1 2 C5 R1 R2, R3 R4 L1, L2 L3 L4, L5 U1 J1, J2 VCC,GND, TUNE None None 1 1 2 1 2 1 2 1 2 6 1 1 6 1 1 ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX2605-MAX2609 Evaluation Kits Evaluate: MAX2605-MAX2609 MAX2607 Component List DESIGNATION QTY DESCRIPTION 1000pF 5% ceramic capacitors (0603) Murata GRM39COH102J025A or AVX 06035A102JAT2A 3pF 0.25% ceramic capacitors (0603) Murata GRM39COG030C050A 10F 10%, 16V tantalum capacitor AVX TAJC106K016 270 5% resistor (0603) Not installed 10 5% resistor (0603) Not installed 68nH 2% inductor Coilcraft 1008CS-680XJBC 120nH inductors Coilcraft 1008CS-121XJBC MAX2607EUT SMA connectors (edge mount) EFJohnson 142-0701-801 or Digi-Key J502-ND Test points MAX2605/6/7 EV kit circuit board MAX2605-MAX2609 data sheet C5 R1 R2, R3 R4 L1 L4, L5 U1 J1, J2 VCC,GND, TUNE None None 1 1 2 1 1 2 1 2 MAX2608 Component List DESIGNATION QTY DESCRIPTION 1000pF 5% ceramic capacitor (0603) Murata GRM39COH102J025A or AVX 06035A102JAT2A 1pF 0.25% ceramic capacitors (0603) Murata GRM39COG010C050A 100pF 5% ceramic capacitors (0603) Murata GRM39COG101J050A 10F 10%, 16V tantalum capacitor AVX TAJC106K016 270 5% resistor (0603) Not installed 10 5% resistor (0603) 22nH 2% inductor Coilcraft 0805CS-220XGBC 68nH 2% inductors Coilcraft 0805CS-680XJBC MAX2608EUT SMA connectors (edge mount) EFJohnson 142-0701-801 or Digi-Key J502-ND Test points Digi-Key 5000K-ND MAX2608/9 EV kit circuit board MAX2605-MAX2609 data sheet C1, C4 2 C1 1 C2, C3 2 C2, C3 2 C5 R1 R2, R3 R4 L1, L2 L3 L4, L5 U1 J1, J2 VCC,GND, TUNE None None 1 1 2 1 2 1 2 1 2 C4, C6 2 6 1 1 6 1 1 Quick Start The MAX2605-MAX2609 evaluation kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section for proper device evaluation. - Use a DC power supply capable of supplying +0.4V to +2.4V, continuously variable, for TUNE. Alternatively, use two 1.5V batteries with a resistive voltage divider or potentiometer. * An RF spectrum analyzer that covers the operating frequency range of the MAX2605-MAX2609 * A 50 coaxial cable with SMA connectors * An ammeter (optional) Test Equipment Required * Low-noise power supplies (these are recommended for oscillator noise measurement). Noise or ripple will frequency-modulate the oscillator and cause spectral spreading. Batteries can be used in place of power supplies, if necessary. - Use a DC power supply capable of supplying +2.7V to +5.5V. Alternatively, use two or three 1.5V batteries. 2 Connections and Setup 1) Connect a DC supply (preset to +3V) to the VCC and GND terminals (through an ammeter, if desired) on the EV kit. 2) Turn on the DC supply. If used, the ammeter reading _______________________________________________________________________________________ MAX2605-MAX2609 Evaluation Kits MAX2609 Component List DESIGNATION QTY DESCRIPTION 1000pF 5% ceramic capacitors (0603) Murata GRM39COH102J025A or AVX 06035A102JAT2A 1pF 0.25% ceramic capacitors (0603) Murata GRM39COG010C050A 100pF 5% ceramic capacitors (0603) Murata GRM39COG101J050A 10F 10%, 16V tantalum capacitor AVX TAJC106K016 270 5% resistor (0603) Not installed 10 5% resistor (0603) 8.2nH 2% inductor Coilcraft 0805CS-080XGBC 27nH 2% inductors Coilcraft 0805CS-270XJBC MAX2609EUT SMA connectors (edge mount) EFJohnson 142-0701-801 or Digi-Key J502-ND Test points Digi-Key 5000K-ND MAX2608/9 EV kit circuit board MAX2605-MAX2609 data sheet C1 1 C2, C3 2 C4, C6 2 coupling from the supply. Also, place the VCO as far away as possible from the noisy section of a larger system, such as a switching regulator or digital circuits. The VCO's performance is strongly dependent on the availability of the external tuning inductor. For best performance, use high-Q components and choose their values carefully. To minimize the effects of parasitic elements, which degrade circuit performance, place the tuning inductor and CBYP close to the VCO. For higherfrequency versions, include the parasitic PC board inductance and capacitance when calculating the oscillation frequency. In addition, remove the ground plane around and under the tuning inductor to minimize the effect of parasitic capacitance. Noise on TUNE translates into FM noise on the outputs; therefore, keep the trace between TUNE and the control circuitry as short as possible. If necessary, use an RC filter to further suppress noise, as done on the EV kits. Evaluate: MAX2605-MAX2609 C5 R1 R2, R3 R4 L1 L4, L5 U1 J1, J2 VCC,GND, TUNE None None 1 1 2 1 1 2 1 2 6 1 1 approximates the typical operating current specified in the MAX2605-MAX2609 data sheet. 3) Connect the VCO output (OUT+ or OUT-) to a spectrum analyzer with a 50 coaxial cable. 4) Apply a positive variable DC voltage between 0.4V and 2.4V to TUNE. 5) Check the tuning bandwidth on the spectrum analyzer by varying the tuning voltage (+0.4V to +2.4V). Layout Considerations The EV kit PC board can serve as a guide for laying out a board using the MAX2605-MAX2609. Generally, the VCC pin on the PC board should have a decoupling capacitor placed close to the IC. This minimizes noise _______________________________________________________________________________________ 3 MAX2605-MAX2609 Evaluation Kits Evaluate: MAX2605-MAX2609 L1 OPEN C3 1 IND OUT+ 6 OUT+ SMA R3 OPEN R4 10 VCC R2 OPEN C2 3 C1 1000pF TUNE OUT4 OUTSMA C4 1000pF + C5 10V 10F GND L2 OPEN L3 U1 2 GND MAX2605 MAX2606 MAX2607 VCC 5 L4 L5 R1 270 TUNE Figure 1. MAX2605/MAX2606/MAX2607 EV Kits Schematic C3 1 IND OUT+ 6 OUT+ SMA R3 OPEN R4 10 VCC R2 OPEN C2 3 C1 1000pF TUNE OUT4 OUTSMA C6 100pF C4 100pF + C5 10V 10F GND L1 U1 2 GND MAX2608 MAX2609 VCC 5 L4 L5 R1 270 TUNE Figure 2. MAX2608/MAX2609 EV Kits Schematic 4 _______________________________________________________________________________________ MAX2605-MAX2609 Evaluation Kits Evaluate: MAX2605-MAX2609 1.0" Figure 3. MAX2605/MAX2606/MAX2607 EV Kits Component Placement Guide--Top Silk Screen 1.0" Figure 4. MAX2608/MAX2609 EV Kits Component Placement Guide--Top Silk Screen 1.0" Figure 5. MAX2605/MAX2606/MAX2607 EV Kits PC Board Layout--Component Side 1.0" Figure 6. MAX2608/MAX2609 EV Kits PC Board Layout-- Component Side _______________________________________________________________________________________ 5 MAX2605-MAX2609 Evaluation Kits Evaluate: MAX2605-MAX2609 1.0" Figure 7. MAX2605/MAX2606/MAX2607/MAX2608/MAX2609 EV Kits PC Board Layout--Ground Plane 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. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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