 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| 19-1507; Rev 0; 8/99 MAX2312/MAX2316 Evaluation Kits General Description The MAX2312/MAX2316 evaluation kits (EV kits) simplify testing of the MAX2312/MAX2316 IF receivers. These kits allow evaluation of the devices' variable-gain amplifier (VGA), I/Q demodulator, voltage-controlled oscillator (VCO), synthesizer, 3-wire programming interface, and power-management features. Figure 2 shows the MAX2312/MAX2316 EV kits schematic. The EV kits provide 50 SMA connectors for all signal inputs and outputs. A varactor-based tank circuit is provided for the on-chip VCO and can be tuned by a potentiometer or an external voltage or phase locked with the on-chip phase-locked loop (PLL). PC board pads (J12, J13, J14, J15) are available for installing low-inductance oscilloscope probe points, if desired. o 3-Wire Interface o Differential Baseband Outputs o +2.7V to +5.5V Single-Supply Operation o SMA Connectors on All Signal Ports o Low-Power Shutdown Mode o PC Control Software (available at www.maxim-ic.com) Features Evaluate: MAX2312/MAX2316 Ordering Information PART MAX2312EVKIT MAX2316EVKIT TEMP. RANGE -40C to +85C -40C to +85C PIN-PACKAGE 28 QSOP 28 QSOP Note: To evaluate the MAX2310 or MAX2314, order the MAX2310EVKIT or MAX2314 EV KIT, respectively. Component List DESIGNATION QTY C1, C33, C34 C2, C4, C8, C12, C23, C24, C25 C3, C9, C10, C11, C13, C14, C16, C21, C22, C28, C35, C37, C38, C42 3 7 DESCRIPTION 47pF 10%, 25V min ceramic capacitors (0402) 330pF 10%, 25V min ceramic capacitors (0402) DESIGNATION QTY C30 R1, R11, R12, R31-R34 R2, R6, R8, R14, R16, R18, R35 R3, R10 R4, R5, R23 R7 C5 1 1.5pF 0.1pF ceramic capacitor (0402) (MAX2312) or 5.0pF 0.1pF ceramic capacitor (0402) (MAX2316) 12pF 5%, 25V min ceramic capacitors (0402) (MAX2312) or 18pF 5%, 25V min ceramic capacitors (0402) (MAX2316) Open 8.0pF 5%, 25V min ceramic capacitors (0402) (MAX2312) or 15pF 5%, 25V min ceramic capacitor (0402) (MAX2316) 10F 10%, 16V min tantalum capacitor AVX TAJC106K016 0.033F 10%, 25V min ceramic capacitor (0402) L4 1 R9 R13, R24 R15, R17, R19, R20, R21, R25, R27-R30, R36 R22 T1 1 8 6 2 3 1 1 2 DESCRIPTION 3300pF 10%, 25V min ceramic capacitor (0402) 0 resistors (0402) 100 5% resistors (0402) 68 5% resistors (0402) 10k 5% resistors (0402) 49.9 1% resistor (0402) 680 5% resistor (0402) 10k Bourns variable resistors Digi-Key 3296W-104-ND Open 47k 5% resistor (0402) Balun transformer Toko 458DB-1011 18nH 5% inductor (MAX2312) Coilcraft 0805CS-180TJBC or 68nH 5% inductor (MAX2316) Coilcraft 0805CS-680TJBC 180nH 10% inductor (MAX2312) Coilcraft 20805CS-181TKBC or 680nH 10% inductor (MAX2316) Coilcraft 1008CS-681TKBC 1 14 0.01F 10%, 25V min ceramic capacitors (0402) C6, C7 2 11 1 1 C15, C26, C32, C36, C39, C40 6 C19, C20 2 L2 1 C27 C29 1 1 ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX2312/MAX2316 Evaluation Kits Evaluate: MAX2312/MAX2316 Component List (continued) DESIGNATION QTY L6 J1-J5, J7, J8 JU3, JU10, JU11 J6 Q1 D1 D4 U1 None None None INTF2300 Board 1 7 3 1 1 1 1 1 1 1 1 1 DESCRIPTION 270nH inductor Coilcraft 0805CS-271 XKBC SMA connectors (edge-mount) E.F. Johnson 142-0701-801 Shunts Open Open Open Varactor diode Alpha SMV1255-003 MAX2312EEI or MAX2316EEI MAX2312/MAX2316 circuit board MAX2310/MAX2312/MAX2314/ MAX2316 data sheet 20-pin ribbon cable 3-wire programming and interface board Personal Computer Additional Voltage Source for External Control of VGA Functions Optional Oscilloscope RF Signal Generators (2) Table 1. Recommended Equipment EQUIPMENT DESCRIPTION HP 8648A or equivalent. Capable of delivering -70dBm to -10dBm of output power in the 10MHz to 500MHz frequency range. One generator is required to test the receive signal path, and the other is for the reference frequency. For viewing the demodulator outputs, 3-wire serial interface, and other functions Capable of providing at least 100mA at +2.7V to +5.5V Power Supply 486DX33 or better, with Windows95(R) or Windows98(R) operating system and a functional parallel port Component Suppliers SUPPLIER Alpha Industries AVX Coilcraft Digi-Key Toko PHONE 617-935-5150 803-946-0690 847-639-6400 218-681-6674 708-297-0070 FAX 617-933-2359 803-626-3123 847-639-1469 218-681-3380 708-699-1194 Windows95 and Windows98 are registered trademarks of Microsoft Corp. CDMA Mode Perform the following steps to evaluate the MAX2312/ MAX2316 in CDMA mode: 1) Verify that shunts JU3, JU10, and JU11 are in place. 2) Connect the INTF2300 interface cable as shown in Figure 1. (Pin 1 of the interface cable corresponds to the red wire; pin 1 is designated in silk screen on each of the PC boards.) 3) Connect a +2.75V power supply to the VCC and GND terminals. 4) Install and run Maxim's CDMA control software (available at www.maxim-ic.com). Click on the CDMA control software on the windows task bar. On the IC selection form, click on the MAX2312/ MAX2316 control button. 5) With the MAX2312/MAX2316 control screen active, bring the DIVSEL pin high by clicking on the "H" control button located near the middle of the screen if testing a MAX2312. If testing a MAX2316, click on "L." 6) With the MAX2312/MAX2316 control screen active, bring the SHDN pin high by clicking on the "H" control button located near the middle of the screen. Quick Start The MAX2312/MAX2316 EV kits are fully assembled and factory tested. Follow the instructions in the Connections and Setup section. Recommended Test Equipment The test equipment recommended to verify MAX2312/MAX2316 operation is listed in Table 1. This list is intended as a guide only; substitutions may be possible. Connections and Setup The following sections provide instructions for running the EV kits in CDMA mode. 2 _______________________________________________________________________________________ MAX2312/MAX2316 Evaluation Kits 7) For the MAX2312 only, in the control register, change the VCOSEL bit to "1" and press "Send Data." For the MAX2316, in the control register, set the VCOSEL bit to "0" and press "Send Data." 8) Connect a function generator to the REF port configured for a sine wave with a 19.68MHz frequency and a -10dBm amplitude. (The REF port is 50 terminated.) 9) Connect a signal generator with 210.48MHz (MAX2312) or 85.48MHz (MAX2316) at -66dBm, and apply to the CDMA DIFF port. 10) Set the VGC control to 2.5VDC by rotating potentiometer R13. 11) Configure an oscilloscope to measure a highimpedance, 1Vp-p, 100kHz differential waveform. Connect it to the I or Q output. Voltage gain can be calculated by: VOUTp-p Gain = 20log 2 2 VIN VIN (RMS) = 1/2 10 PIN(dBm) PIN(dBm) 10 Interface Control The interface port is designed to use a 20-pin ribbon cable (Figure 1). Ten pins are signal lines, and the other 10 pins are digital grounds. Pin 1 of the interface cable is red. Pin 1 is also designated in silk screen on each of the PC boards. Evaluate: MAX2312/MAX2316 Detailed Description The following sections cover the EV kits' circuit blocks in detail. (Refer to the MAX2310/MAX2312/MAX2314/ MAX2316 data sheet for additional information.) CDMA Inputs The CDMA+ and CDMA- pins are differential inputs to the MAX2312/MAX2316's VGA. The EV kit is configured for single-ended (50) operation at the CDMA DIFF input connector. (The on-board balun converts this input to a differential signal for the MAX2312/ MAX2316.) The impedance is set by the combination of L4, R9, C19, C20, and the 4:1 impedance ratio of the input balun. REF Inputs 10 The REF port is AC-coupled and terminated for use with a 50 signal source. Gain = approximately 60dB Note: The balun loss is not taken into account. This loss is typically 0.5dB. I/Q Outputs The I/Q outputs are self-biased baseband outputs. PC Board Layout/Construction The MAX2312/MAX2316 EV kits can serve as board layout guides. Keep PC board trace lengths as short as possible to minimize parasitics. Keep decoupling capacitors close to the device, with a low-inductance via connection to the ground plane. The MAX2312/MAX2316 EV kits' PC boards use 14milwide traces for 50 traces. The PC board has an 8millayer profile on FR4, with a 4.5 dielectric and 75mil trace-to-ground-plane spacing. Adjustments and Control VGC Adjust The MAX2312/MAX2316 EV kits are configured with a 10k trim pot for setting and adjusting the VGC gain. An external supply can be used by removing the 2-pin shunt JU3 and by directly connecting the supply to JU2. The VGC voltage must be clean to minimize undesired amplitude modulation. VCO Adjust The MAX2312/MAX2316 EV kits are configured with a 10k trim pot for setting and adjusting the VCO voltage. Apply a 2-pin shunt to the VCO potentiometer and external VCO header (JU1). Place a 0 resistor in R25 and remove R1 to break the loop and remove the charge-pump output. The VCO voltage must be clean to minimize undesired frequency modulation. _______________________________________________________________________________________ 3 MAX2312/MAX2316 Evaluation Kits Evaluate: MAX2312/MAX2316 Interface Board INTF2300 Interface Board The INTF2300 interface board is used to control the 3wire interface of a device under test from the parallel port of a PC. This board level translates 5V logic from the PC to VCC of the device under test. The INTF2300 also provides buffering and EMI filtering. The recommended operating supply voltage range is +2.7V to +3.6V. For operation of the MAX2312/MAX2316 above +3.6V, jumper JU1 may be removed and an external supply voltage of +3.6V may be applied between VCC (pin 2) and GND (pin 1) (Figure 1). GND JU1 1 DB25M VCC 2 3 1 1 TO PC PARALLEL PORT 6 20 10 INTF2300 10 DUT MAX2310 MAX2314 VCCD 6 20 1 1 Figure 1. INTF2300 Interface Board 4 _______________________________________________________________________________________ VCCA VCCA VCC C16 0.01F R24 10k 26 STBY GND 25 R23 10k C29 R1 0 0.033F C30 3300pF C1 47pF BYP 1 DR BYP C14 C13 0.01F 0.01F 28 27 STBY C36 OPEN JU1 MAX2312 MAX2316 C19 CDMA+ CDMA DIFF L4 24 R9 680 T1 J5 2 CPOUT 3 GND DIVSEL DIVSEL CDMA5 TANKH+ D4 6 TANKHC21 0.01F VGC C7 BUFEN C3 0.01F 8 LOOUT VCC VCCA DATA DATA EN REF CLK 18 CLK C22 0.01F QOUT+ 17 19 20 VCC 10 GND 11 R7 49.9 SHDN 13 IOUT+ R31 0 J2 14 IOUTR32 0 C11 0.01F MAX2312 1.5pF 12pF 18nH VCC R22 47k COMPONENT MAX2316 C5 C6, C7 L2 68nH 18pF 5.0pF C9 0.01F LOCK 15 LOCK QOUT16 C35 0.01F R33 0 COMPONENT MAX2316 C19 C20 L4 15pF 15pF 680nH MAX2312 8pF 8pF 180nH J8 QOUT12 SHDN J1 9 21 VCCD C10 0.01F 7 BUFEN 22 R12 0 JU3 JU2 C5 L2 C20 TOKO 4458D8-1011 23 R4 10k C6 Figure 2. MAX3212/MAX3216 EV Kits Schematic 4 VCC R5 10k R13 10k VGC J4 R3 68 R10 68 J3 EN R34 0 J7 QOUT+ LOOUT REF IOUT+ Evaluate: MAX2312/MAX2316 _______________________________________________________________________________________ IOUT- MAX2312/MAX2316 Evaluation Kits 5 Evaluate: MAX2312/MAX2316 R35 100 STBY C4 330pF VCC C2 330pF BUFEN 10 STBY BUFEN DIVSEL SHDN FILTERED VCC 9 8 SHDN C42 0.01F 6 R14 100 5 R16 100 EN C24 330pF CLK C25 330pF LOCK R18 100 4 3 C23 330pF C12 330pF R8 100 7 R6 100 R2 100 MAX2312/MAX2316 Evaluation Kits Figure 2. MAX3212/MAX3216 EV Kits Schematic (continued) DIVSEL C8 330pF DATA EN CLK 2 1 VCC LOCK JU10 C28 0.01F ICCA VCCA C37 0.01F C33 47pF C27 10F JU11 VCCD ICCD C38 0.01F C34 47pF 6 L6 270nH VCC DATA _______________________________________________________________________________________ VCC GND MAX2312/MAX2316 Evaluation Kits Evaluate: MAX2312/MAX2316 1.0" 1.0" Figure 3. MAX2312/MAX2316 EV Kits PC Board Layout Component Side--Layer 1 Figure 4. MAX2312/MAX2316 EV Kits Ground Plane--Layer 2 1.0" Figure 5. MAX2312/MAX2316 EV Kits Inner Layer--Layer 3 _______________________________________________________________________________________ 7 MAX2312/MAX2316 Evaluation Kits Evaluate: MAX2312/MAX2316 1.0" 1.0" Figure 6. MAX2312/MAX2316 EV Kits PC Board Layout Solder Side--Layer 4 Figure 7. MAX2312/MAX2316 EV Kits Component Placement Guide--Component 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. 8 _____________________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. |
Price & Availability of MAX2312EVKIT
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |