 |
|
| 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: |
| 19-1620; Rev 0; 1/00 MAX2683/MAX2684 Evaluation Kits General Description The MAX2683/MAX2684 evaluation kits (EV kits) simplify evaluation of the MAX2683/MAX2684 3.4GHz to 3.8GHz downconverter mixers. The EV kits are fully assembled and tested, allowing simple evaluation of all device functions. All signal ports utilize SMA connectors, providing a convenient interface to RF test equipment. The MAX2683/MAX2684 are downconversion mixers intended for operation in the 3.4GHz to 3.8GHz frequency range. The MAX2683 is optimized for downconversion to IF frequencies between 100MHz and 400MHz, and allows high-side or low-side LO injection. The MAX2684 is optimized for IF frequencies between 800MHz to 1000MHz and only allows low-side LO injection. A logiclevel enabled LO frequency doubler allows the external LO source to run at half frequency, or at full frequency if disabled. As assembled, the MAX2683/MAX2684 EV kits are configured for operation of the LO at half frequency. A few simple component changes configure the EV kit for operation of the LO at full frequency. In addition, an external resistor allows adjustment of device linearity and supply current. Features o Easy Evaluation of MAX2683/MAX2684 o All Critical Peripheral Components Included o SMA Input and Output Signal Connectors o RF Input Matched to 50 at 3600MHz o IF Output Matched to 50 at 300MHz (MAX2683) o IF Output Matched to 50 at 900MHz (MAX2684) o Fully Assembled and Tested Evaluate: MAX2683/MAX2684 Ordering Information PART MAX2683EVKIT MAX2684EVKIT *Exposed paddle TEMP. RANGE -40C to +85C -40C to +85C IC PACKAGE 16 TSSOP-EP* 16 TSSOP-EP* MAX2683 Component List DESIGNATION QTY C1 1 DESCRIPTION 3300pF 10% ceramic capacitor (0402) Murata GRM36X7R332K050 or Taiyo Yuden UMK105B332KW 1pF 0.1pF ceramic capacitor (0603) Murata GRM39COG010B050 100pF 5% ceramic capacitors (0603) Murata GRM39COG101J050 or Taiyo Yuden UMK107CH101JZ 10F, 10V tantalum capacitor AVX TAJB106M010 Not installed 1000pF 10% ceramic capacitor (0603) Murata GRM39X7R102K050 8.2pF 0.25pF ceramic caps (0603) Murata GRM39COG8R2C050 or Taiyo Yuden UMK107CH8R2CZ 3.3pF 0.1pF ceramic cap (0603) Murata GRM39COG3R3B050 3-pin header 1.2nH 0.2nH inductor (0402) Murata LQP10A1N2C00 T1 U1 VCC, GND None None None None 1 1 2 1 1 1 1 DESIGNATION QTY L3, L4 L5 R1, R2 R3 R4 RFIN, LOX, IF 2 1 2 1 0 3 DESCRIPTION 39nH 5% inductors (0603) Murata LQG11A39NJ00 3.9nH 3nH inductor (0603) Murata LQG11A3N9S00 1.21k 1% resistors (0603) 1.50k 1% resistor (0603) Not installed SMA connectors (PC edge mount) EFJohnson 142-0701-801 Balun transformer, B4F type Toko 617DB-1018 MAX2683EUE (16-pin TSSOP) Test points Shunt (JU1) MAX2683/MAX2684 PC board MAX2683/MAX2684 data sheet MAX2683/MAX2684 EV kit data sheet C2 1 C3, C6, C12 3 C4 C5 C7 1 0 1 C8, C9 2 C10 JU1 L1 1 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. MAX2683/MAX2684 Evaluation Kits Evaluate: MAX2683/MAX2684 MAX2684 Component List DESIGNATION QTY C1 1 DESCRIPTION 3300pF 10% ceramic cap (0402) Murata GRM36X7R332K050 or Taiyo Yuden UMK105B332KW 1pF 0.1pF ceramic capacitor (0603) Murata GRM39COG010B050 100 pF 5% ceramic capacitors (0603) Murata GRM39COG101J050 or Taiyo Yuden UMK107CH101JZ 10F, 10V tantalum capacitor AVX TAJB106M010 Not installed 1000pF 10% ceramic cap (0603) Murata GRM39X7R102K050 8.2pF 0.25pF ceramic caps (0603) Murata GRM39COG8R2C050 or Taiyo Yuden UMK107CH8R2CZ Not installed None JU1 L1 1 1 3-pin header None 1.2nH 0.2nH inductor (0402) Murata LQP10A1N2C00 None 1 1 MAX2683/MAX2684 data sheet MAX2683/MAX2684 EV kit data sheet 1 MAX2683/MAX2684 PC board T1 U1 VCC, GND None 1 1 2 1 Balun transformer, B4F type Toko 617DB-1018 MAX2684EUE (16-pin TSSOP) Test points Shunt (JU1) DESIGNATION QTY L3, L4 L5 R1, R2 R3 R4 RFIN, LOX, IF 2 1 2 1 0 3 DESCRIPTION 6.8nH 5% inductors (0603) Murata LQG11A6N8J00 3.9nH 0.3nH inductor (0603) Murata LQG11A3N9S00 1.21k 1% resistors (0603) 301 1% resistor (0603) Not installed SMA connectors (PC edge mount) EFJohnson 142-0701-801 C2 1 C3, C6, C12 3 C4 C5 C7 1 0 1 C8, C9 C10 2 0 Component Suppliers SUPPLIER AVX EFJohnson Murata Taiyo Yuden Toko PHONE FAX WEB www. avxcorp.com www. efjohnson.com www. murata.com www. T-Yuden.com www. tokoam.com 843-448-9411 843-448-1943 402-474-4800 402-474-4858 800-831-9172 814-238-0490 800-348-2496 847-925-0899 800-PIK-TOKO 708-699-1194 * Two low-noise RF-signal generators or equivalent (50) sine-wave sources capable of delivering at least 0dBm of output power up to 4GHz. One generator is required for the RF signal source, while the second generator is required for the LO signal source. One HP 8561E RF-spectrum analyzer or equivalent that covers the downconverter mixer's output frequency range, as well as a few harmonics (6GHz). Three 50 SMA cables (RG-58A/U or equivalent). Optional: digital multimeters (DMMs) to monitor DC supply voltage and supply current. * * * Connections and Setup This section provides step-by-step instructions for getting the EV kit up and running: 1) DC Power Supply: Set the power-supply voltage to +5V. Turn the power supply off and connect it to the VCC and GND connections on the EV kit. If desired, place an ammeter in series with the power supply to measure supply current and a voltmeter in parallel with the VCC and GND connections to measure the supply voltage delivered to the device. Test Equipment Required This section lists the test equipment required for evaluating the MAX2683/MAX2684: * One power supply capable of providing 100mA of supply current over the supply voltage range of +2.7V to +5.5V. 2 _______________________________________________________________________________________ MAX2683/MAX2684 Evaluation Kits 2) RF Signal Source: Set one signal generator to an RF frequency of 3.6GHz at an output power level of -20dBm. Turn the output of the signal generator off. Connect the signal generator to the RF port SMA connector using a 50 SMA cable. 3) LO Signal Source: The MAX2683/MAX2684 can be configured for full- or half-frequency operation of the external LO signal source. As assembled, the MAX2683/MAX2684 EV kits are configured for halffrequency operation of the LO signal source. The half-frequency LO port, LOX2, is coupled to the MAX2683/MAX2684 EV kit LO port SMA connector, while the LOX1 port is left unconnected. To evaluate the devices with the LO doubler enabled, be sure jumper JU1 is shorted to GND (ENX2 = GND). Set the LO signal generator output power to -5dBm at a frequency of 1650MHz (MAX2683) or 1350MHz (MAX2684). Turn the output of the signal generator off. Connect the signal generator to the LO port SMA connector using a 50 SMA cable. Evaluation of the devices with full-frequency operation of the LO signal source requires two component changes. Remove inductor L5 and leave the LOX2 port unconnected. Short the unpopulated pads of resistor R4 with a 0 resistor. Disable the LO frequency doubler by shunting jumper JU1 to VCC (ENX2 = VCC). Set the LO signal generator output power to -5dBm, at a frequency of 3300MHz (MAX2683) or 2700MHz (MAX2684). Turn the output of the signal generator off. Connect the signal generator to the LO port SMA connector using a 50 SMA cable. 4) Spectrum Analyzer: Connect the spectrum analyzer to the IF port SMA connector using a 50 SMA cable. Set the center frequency of the spectrum analyzer to 300MHz (MAX2683) or 900MHz (MAX2684). Set the reference level of the spectrum analyzer to -10dBm and the span to 1MHz. 300MHz for the MAX2683 EV kit and 0.8dB at 900MHz for the MAX2684 EV kit. Evaluate: MAX2683/MAX2684 Detailed Description This section describes the circuitry surrounding the MAX2683/MAX2684 EV kits. Figure 1 is the schematic for the MAX2683/MAX2684 EV kits as assembled. For more detailed information covering device operation, refer to the MAX2683/MAX2684 data sheet. RF Input The RFIN port of the MAX2683/MAX2684 is internally biased and requires a DC-blocking capacitor, as well as a matching network for optimum power transfer. Capacitor C1 functions as a DC block, while inductor L1 and capacitor C2 function as a matching network, tuning the RF input of the device for maximum gain at 3.6GHz. LO Input and LO Frequency Doubler Control The MAX2683/MAX2684 include a logic-level-enabled LO frequency doubler. Jumper JU1 controls the LO doubler. A logic-level low on the ENX2 pin enables the frequency doubler, and the external LO signal source operates at half frequency. A logic-level high on the ENX2 pin disables the frequency doubler, and the external LO signal source operates at full frequency. Half-frequency LO signals are applied to the LOX2 port, while full-frequency LO signals are applied to the LOX1 port. Both ports are internally biased and require a DC-blocking capacitor. The unused LO port should be left unconnected. The MAX2683/MAX2684 EV kits, as assembled, are configured for operation of the LO signal source at half frequency. Capacitor C6 functions as a DC block, while inductor L5 improves the return loss of the port. The LOX1 port is left unconnected for half-frequency operation. To evaluate the device with full-frequency operation of the LO source, remove inductor L5 and leave the LOX2 port unconnected (Figure 2). Short resistor R4 with a 0 resistor. Capacitor C6 now functions as the DC block for the LOX1 port. Analysis Turn on the power supply and RF and LO signal generators. The ammeter should read approximately 55mA with the LO doubler enabled (ENX2 = GND) or 40mA with the LO doubler disabled (ENX2 = VCC). If evaluating the MAX2683, the spectrum analyzer should show an output power of approximately -14dBm at a center frequency of 300MHz. If evaluating the MAX2684, the output power should read approximately -20dBm at a center frequency of 900MHz. Be sure to take into account cable, board, and balun losses when calculating power gain. Typical balun losses are 0.3dB at IF Output The MAX2683/MAX2684 incorporate differential, opencollector IF output ports for use in either differential or single-ended applications. To ease evaluation of the devices, the MAX2683/MAX2684 EV kits utilize a balun to convert the differential signal to a single-ended signal compatible with 50 test equipment. The IF output of the MAX2683 is tuned for an IF frequency of 300MHz, while the IF output of the MAX2684 is tuned for an IF frequency of 900MHz. Inductors L3 and L4 provide DC biasing and impedance matching of the 3 _______________________________________________________________________________________ MAX2683/MAX2684 Evaluation Kits Evaluate: MAX2683/MAX2684 VCC 1 VCC C4 10F 10V C3 100pF VCC BIAS 16 R1 1.21k 2 3 GND GND GND U1 MAX2683 MAX2684 GND 15 C8 8.2pF SMA RFIN C1 3300pF C2 1pF L1 1.2nH 4 5 RFIN GND IFOUT+ GND 14 13 L3* 39nH R3* 1.50k L4* 39nH T1 BALUN TOKOB4F SMA IF 4 VCC C10* 3.3pF 3 2 1 C7 1000pF LOX1 LO MODE LOX2 JU1 R2 1.21k C12 100pF GND 6 ENX2 12 6 L5 3.9nH 7 IFOUTLOX2 GND 11 C9 8.2pF C6 SMA LOX 100pF R4 OPEN 10 9 8 LOX1 GND C5 OPEN * VALUES ARE FOR MAX2683 EV KIT ONLY. REFER TO COMPONENT LIST FOR MAX2684 VALUES. Figure 1. MAX2683/MAX2684 EV Kits Schematic Linearity and Supply Current Adjustment The MAX2683/MAX2684 allow the linearity and supply current of the device to be adjusted via an external resistor, R1, to ground. Increased linearity also results in increased supply current. The MAX2683/MAX2684 EV kits are assembled with a nominal R1 value of 1.21k. Replace R1 with a resistor value in the range of 820 to 2k to experiment with the linearity of the device. L5 OPEN 7 LOX2 C6 100pF LO INPUT R4 SHORT MAX2683 MAX2684 8 LOX1 Layout and Bypassing Good PC board layout is an essential aspect of RF circuit design. The EV kits' PC board can serve as a guide for laying out a board using the MAX2683/MAX2684. Keep PC board trace lengths as short as possible to minimize parasitics and losses. Keep bypass capacitors as close to the device as possible with low-inductance connections to the ground plane. Capacitor C4, placed near the VCC connection, and capacitors C3 and C7, placed near the device, help to reduce any high-frequency crosstalk. Capacitor C12 and resistor R2, placed near the ENX2 pin on the device, help to filter out any noise that may be coupled into the ENX2 pin. Figure 2. MAX2683/MAX2684 Full-Frequency LO Port Configuration IFOUT+, and IFOUT- ports. Resistor R3 resistively terminates the IF output. Capacitors C8 and C9 provide impedance matching in addition to DC blocking. In the MAX2683, C10 is also part of an impedance-matching network. The balun provides differential to single-ended conversion as well as 4:1 impedance transformation. The IF output is then connected to the IF port SMA connector. 4 _______________________________________________________________________________________ MAX2683/MAX2684 Evaluation Kits Evaluate: MAX2683/MAX2684 1.0" Figure 3. MAX2683/MAX2684 EV Kits PC Board Layout-- Component Placement Guide 1.0" Figure 4. MAX2683/MAX2684 EV Kits PC Board Layout-- Component Side 1.0" Figure 5. MAX2683/MAX2684 EV Kits PC Board Layout-- Ground Planes 1 and 2 1.0" Figure 6. MAX2683/MAX2684 EV Kits PC Board Layout-- Solder Side _______________________________________________________________________________________ 5 MAX2683/MAX2684 Evaluation Kits Evaluate: MAX2683/MAX2684 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. 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. |
Price & Availability of MAX2683EVKIT-MAX2684EVKIT
 |
|
|
|
|
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] |