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1 9-76; Rev 0; 5/05 General Description The MAX479 evaluation kit (EV kit) allows for a detailed evaluation of the MAX479 ASK/FSK transmitter. It enables testing of the device s RF performance and requires no additional support circuitry. The RF output uses a 50Ω matching network and an SMA connector for convenient connection to test equipment. A reverse polarity SMA is also included to connect to a /4 wave whip antenna. The EV kit can also directly interface to the user s embedded design for easy data encoding. The MAX479EV kit comes in two versions: a 5MHz version and a 4.9MHz version. The passive components are optimized for these frequencies. These components can easily be changed to work at RF frequencies from 00MHz to 450MHz. For easy implementation into the customer s design, the MAX479EV kit also features a proven PC board layout, which can be easily duplicated for quicker time-tomarket. The EV kit Gerber files are available for download at Features Proven PC Board Layout Proven Components Parts List Multiple Test Points Provided on Board Available in 5MHz or 4.9MHz Optimized Versions Adjustable Frequency Range from 00MHz to 450MHz* Fully Assembled and Tested Can Operate as a Stand-Alone Transmitter with Included Battery *Requires component changes. Ordering Information PART TEMP RANGE IC PACKAGE MAX479EVKIT-5-40 C to +85 C 6 Thin QFN MAX479EVKIT-4-40 C to +85 C 6 Thin QFN Component List C, C6 (5MHz) 5pF ±5%, 50V ceramic capacitors Murata GRM885CH50J C7, C9 0.47µF +80/-0%, 6V ceramic capacitors Y5V Murata GRM88F5C474Z C, C6 (4MHz) 6.8pF ±0.5pF, 50V ceramic capacitors C0G Murata GRM885CH6R8D C8, C, C 0pF ±5%, 50V ceramic capacitors Murata GRM885CHJ C (5MHz) pf ±5%, 50V ceramic capacitor C0G Murata GRM885CH0J C (5MHz).pF ±0.5pF, 50V ceramic capacitor C0G Murata GRM885CHRD C (4MHz) 0pF ±5%, 50V ceramic capacitor C0G Murata GRM885CH00J C (4MHz).0pF ±0.5pF, 50V ceramic capacitor C0G Murata GRM885CHR0D C, C0 0.0µF ±0%, 50V ceramic capacitors Murata GRM88R7H0KA0 C4, C5 00pF ±5%, 50V ceramic capacitors Murata GRM885CH0J C4 C5, C6, C8, C9 680pF ±5%, 50V ceramic capacitor C0G Murata GRM885CH68J 0 Not installed JU JU0 0 L (5MHz) L (4MHz) -pin headers Digi-Key S0-6-ND or equivalent 7nH ±5% inductor Coilcraft 060CS-7NXJB nh ±5% inductor Coilcraft 060CS-NXJB Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at
2 L (5MHz) L (4MHz) R nh ±5% inductor Coilcraft 060CS-NXJB 8nH ±5% inductor Coilcraft 060CS-8NXJB 5kΩ potentiometer BC Components SM4W50 R 0 0Ω resistor, any, not installed R 5.Ω ±5% resistor, any R4 0Ω resistor, any Antenna (5MHz) Antenna (4MHz) 0 AN TE N N A_OU T BAT Battery 5MHz /4-wave whip antenna, not provided Lynx ANT-5-CW-RH 4MHz /4-wave whip antenna, not provided Lynx ANT-4-CW-RH RP-SMA connector Linx CONREVSMA00 Battery holder MPD BA0 Coin-cell battery Panasonic BR0 REF_IN RF_OUT Component List (continued) SMA connector top mount, not installed Digi-Key J500-ND Johnson SMA connector top mount Digi-Key J500-ND Johnson U MAX479ATE, VSS, ENABLE, DATA_IN, CKOUT 5 Y (5MHz) Y (4MHz) Test points Mouser 5-0 or equivalent Crystal MHz Hong Kong Crystal SSL984750E0FAFZ800 or Crystek Crystal.56MHz Hong Kong Crystal SSM56000E0FAFZ800 or Crystek Shunt (JU) Digi-Key S9000-ND or equivalent MAX479 EV kit PC board Component Suppliers SUPPLIER PHONE FAX Coilcraft Crystek Hong Kong Crystal Murata Note: Indicate you are using the MAX479 when contacting these manufacturers. Quick Start The following procedure allows for proper device evaluation. Required Test Equipment Regulated power supply capable of providing +.0V Spectrum analyzer such as the Agilent 856E Optional ammeter for measuring supply current Power meter such as the Agilent EPM-44A Connections and Setup This section provides a step-by-step guide to operating the EV kit and testing the device s functionality. Do not turn on the DC power until all connections are made: ) Connect a DC supply set to +.0V, through an ammeter, to the and VSS terminals on the EV kit. Do not turn on the supply. ) Connect the RF_OUT SMA connector to the spectrum analyzer. Set the analyzer to a center frequency of 5MHz (or 4.9MHz) and a span of MHz. ) Turn on the DC supply. The spectrum analyzer should display a peak of about +0dBm at 5MHz (or 4.9MHz). 4) Disconnect the spectrum analyzer and connect the power meter instead. Measure the output power and also the current draw. 5) Calculate the efficiency. This is done using the following equation: Efficiency = 0ˆ(P OUT /0)/(V x I) For example, for a +0.8dBm output, and a 0.9mA (at.0v) current, the efficiency is 7%.
3 Layout Issues A properly designed PC board is an essential part of any RF/microwave circuit. On high-frequency inputs and outputs, use controlled-impedance lines and keep them as short as possible to minimize losses and radiation. At high frequencies, trace lengths that are on the order of λ/0 or longer can act as antennas. Keeping the traces short also reduces parasitic inductance. Generally, in of a PC board trace adds about 0nH of parasitic inductance. The parasitic inductance can have a dramatic effect on the effective inductance. For example, a 0.5in trace connecting a 00nH inductor adds an extra 0nH of inductance or 0%. To reduce the parasitic inductance, use wider traces and a solid ground or power plane below the signal traces. Also, use low-inductance connections to ground on all GND pins, and place decoupling capacitors close to all connections. The EV kit PC board can serve as a reference design for laying out a board using the MAX479. Detailed Description Power-Down Control The MAX479 can be controlled externally using the ENABLE connector. The IC draws approximately 0.nA (at room temperature) in shutdown mode. Jumper JU is used to control this mode. The shunt can be placed between pins and to enable the device. Remove the JU shunt for external control. See Table for jumper function descriptions. Table. JU Through JU4 Jumpers Function JUMPER STATE FUNCTION JU JU JU JU4 - RF carrier transmit enable - Power-down mode N.C. External power-down control - - N.C. RF carrier transmit mode (ASK), FSK high frequency (FSK) PA off, PLL ON (ASK), FSK low frequency (FSK) External data transmit - External supply operation - Battery operation - FSK mode - ASK mode Data Input The MAX479 EV kit transmits ASK and FSK data with data rates of up to 00kbps (ASK) or 0kbps (FSK). JU controls whether the MAX479 transmits the ASK carrier frequency (or the FSK high frequency), turns off the PA (or transmits the FSK low frequency), or transmits an external data stream. See Table. REF_IN External Frequency Input For applications where the correct frequency crystal is not available, it is possible to directly inject an external frequency through the REF_IN SMA (not provided). Connect the SMA to a low-phase-noise generator. The addition of C8 and C9 is necessary (use 0.0µF capacitors). Battery Operation The MAX479 EV kit can be powered by an external power supply or by the supplied V coin-cell battery. Set jumper JU to connect pins and for battery operation. RF Output The MAX479 EV kit includes two SMA connectors for RF output. RF_OUT is a standard SMA and is used to connect the PA output to test equipment. Output is matched to 50Ω. ANTENNA_OUT is a reverse polarity SMA and is used to connect to the /4-wave whip antenna (not supplied). Note that resistor R (0Ω) needs to be added. Modulation Mode Input Jumper JU4 sets the mode of transmission. Set jumper JU4 to connect pins and for FSK mode, and for ASK mode. FSK Frequency Deviation The FSK deviation is set by jumpers JU5 through JU7. The maximum deviation depends on the PC board parasitics. The EV kit max is around 50kHz (5MHz). If very large FSK frequency deviations are desired, use a crystal with a larger motional capacitance and/or reduce PC board parasitic capacitances. One way to reduce parasitic capacitances on the EV kit is to remove C4, C5, and C6 and move the crystal closer to the IC.
4 Table. Clock-Divider Settings JUMPER SETTING JUMPER SETTING JUMPER SETTING FUNCTION JU Max deviation /8 x max deviation /4 x max deviation /8 x max deviation JU6 JU / x max deviation /8 x max deviation /4 x max deviation - Clock Output Jumpers JU8 and JU9 set the divider ratio for the clock output. See Table for the settings. Table. Clock Divider Settings Envelope Shaping Jumper JU0 sets envelope shaping for a more gentle turn-on/turn-off of the PA in ASK mode. Set jumper JU0 to connect pins and to allow for envelope shaping. See Table 4 for settings. - JUMPER SETTING JUMPER SETTING FUNCTION JU8 - - f XTAL /6 - - f XTAL /8 - JU9 - f XTAL /4 - - Table 4. JU0 Jumper Function JUMPER STATE FUNCTION - No envelope shaping JU0 - Envelope shaping Logic 0 output - /8 x max deviation I/O Connections Table 5 is a list of all I/O connections. Table 5. I/O Connectors RF_OUT REF_IN SIGNAL ANTENNA_OUT VSS DATA_IN ENABLE CLKOUT RF output External reference frequency input Reverse polarity SMA for /4-wave antenna Ground Power-supply input Data input Power-down control Buffered clock output For additional information and a list of application notes, consult the website. 4
5 DATA_IN ENABLE C8 JU4 JU JU 4 4 XTAL MODE DIN ENABLE C4 00pF Y* C6 U MAX479 C5 00pF XTAL GND V DD _PA ROUT C9 C5 R 5kΩ REF_IN VSS C7 0.47µF JU0 L* C 0pF C9 0.47µF 50Ω OUTPUT * AT 5MHz AT 4.9MHz C 5pF 6.8pF C pf 0pF C6 5pF 6.8pF C.pF.0pF L 7nH nh L nh 8nH Y MHz.56MHz USE WIRE-WOUND INDUCTORS ONLY. C0 0.0µF C8 0pF C 0pF C 0.0µF C4 680pF R 5.Ω R4 0Ω JU BAT CKOUT 5 CLKOUT PAOUT CLK0 CLK DEV0 DEV DEV 9 0 JU9 JU7 JU5 8 C* C* C* L* C6* RF_OUT R ANTENNA_OUT JU8 JU6 Figure. MAX479 EV Kit Schematic 5
6 Figure. MAX479 EV Kit Component Placement Guide Component Side Figure. MAX479 EV Kit PC Board Layout Component Side Figure 4. MAX479 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. 6 Maxim Integrated Products, 0 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.
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General Description The MAX753 5V evaluation kit (EV kit) (TDFN) is a fully assembled and tested circuit board that demonstrates the performance of the MAX753 4V, 00mA ultra-small, high-efficiency, synchronous
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9-75; Rev ; 5/5 MAX7 Evaluation Kit General Description The MAX7 evaluation kit (EV kit) simplifies the testing and evaluation of the MAX7 quadrature transmitter. The EV kit provides 5Ω connectors for
More informationFeatures. Applications
QwikRadio UHF ASK/FSK Transmitter General Description The is a high performance, easy to use, single chip ASK / FSK Transmitter IC for remote wireless applications in the 300 to 450MHz frequency band.
More informationEvaluates: MAX2837. MAX2837 Evaluation Kit. General Description. Features. Quick Start. Connections and Setup
General Description The MAX2837 evaluation kit (EV kit) simplifies testing of the device s receive and transmit performance in WiMAX applications operating in the 2.3GHz to 2.7GHz ISM band. The EV kit
More information10MHz to 1050MHz Integrated RF Oscillator with Buffered Outputs
9-24; Rev 2; 2/02 EVALUATION KIT AVAILABLE 0MHz to 050MHz Integrated General Description The combines a low-noise oscillator with two output buffers in a low-cost, plastic surface-mount, ultra-small µmax
More information300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter
EVALUATION KIT AVAILABLE MAX044 General Description The MAX044 crystal-referenced phase-locked-loop (PLL) VHF/UHF transmitter is designed to transmit OOK/ASK data in the 300MHz to 450MHz frequency range.
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9-064; Rev ; 0/08 MAX8654 Evaluation Kit General Description The MAX8654 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the capabilities of the MAX8654 integrated 8A step-down
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19-6407; Rev 0; 7/12 MAX98355 Evaluation Kit General Description The MAX98355 evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the MAX98355 PCM digital input Class D power amplifier.
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9-644; Rev ; 6/00 MAX3296 Shortwave or VCSEL General Description The MAX3296 shortwave or vertical cavity-surface emitting laser (VCSEL) evaluation kit (EV kit) is an assembled, surface-mount demonstration
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19-13; Rev 1; /1 EVALUATION KIT AVAILABLE W-CDMA LNA/Mixer ICs General Description The MAX37/MAX3/ low-noise amplifier (LNA), downconverter mixers designed for W-CDMA applications, are ideal for ARIB (Japan)
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19-5288; Rev 0; 5/10 MAX3543 Evaluation Kit General Description The MAX3543 evaluation kit (EV kit) simplifies the testing and evaluation of the MAX3543 hybrid television tuner. The EV kit is fully assembled
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9-967; Rev 0; /07 MAX68B Evaluation Kit General Description The MAX68B evaluation kit (EV kit) is a fully assembled and tested surface-mount printed-circuit board (PCB) designed to evaluate the MAX68B
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19-4974; Rev 0; 9/09 MAX9926U Evaluation Kit General Description The MAX9926U evaluation kit (EV kit) is a fully assembled and tested circuit board that contains a dual-channel differential variable-reluctance
More information+5V MAX3654 FTTH VIDEO TIA IN+ TIA IN- + OPAMP - Maxim Integrated Products 1
19-3745; Rev 0; 7/05 47MHz to 870MHz Analog CATV General Description The analog transimpedance amplifier (TIA) is designed for CATV applications in fiber-to-the-home (FTTH) networks. This high-linearity
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19-4362; Rev 1; 3/09 MAX5963 Evaluation Kit General Description The MAX5963 evaluation kit (EV kit) circuit demonstrates the dual hot-swap, current-limit/circuit-breaker, and ORing functions of the MAX5963
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19-5281; Rev 0; 5/10 MAX15059 Evaluation Kit General Description The MAX15059 evaluation kit (EV kit) demonstrates the MAX15059 APD biasing pulse-width modulation (PWM) step-up DC-DC converter with an
More information433MHz Single Chip RF Transmitter
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9-539; Rev 0; 6/0 MAX5035 Evaluation Kit General Description The MAX5035 evaluation kit (EV kit) demonstrates the standard 5A application circuit of the MAX5035. This DC-DC converter steps down from the
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More informationVI1 VI2 VQ1 VQ2 II1 II2 IQ1 IQ2. Maxim Integrated Products 1
1-22; Rev ; 1/3 High-Gain Vector Multipliers General Description The MAX4/MAX4/MAX4 low-cost, fully integrated vector multipliers alter the magnitude and phase of an RF signal. Each device is optimized
More informationCLK_EN CLK_SEL. Q3 THIN QFN-EP** (4mm x 4mm) Maxim Integrated Products 1
19-2575; Rev 0; 10/02 One-to-Four LVCMOS-to-LVPECL General Description The low-skew, low-jitter, clock and data driver distributes one of two single-ended LVCMOS inputs to four differential LVPECL outputs.
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9-0766; Rev ; /08 General Description The MAX8790A evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB that evaluates the high-efficiency MAX8790A white LED (WLED) driver. The MAX8790A
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MAX68 Evaluation Kit Evaluates: MAX68 General Description The MAX68 evaluation kit (EV kit) demonstrates the MAX68 high-brightness LED (HB LED) driver, integrating a step-up DC-DC preregulator followed
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Complies with Directive 00//EC (RoHS) I. Product Overview TXC0 is a rugged, single chip ASK/FSK Transmitter IC in the 300-0 MHz frequency range. This chip is highly integrated and has all required RF functions
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General Description The MAX706 evaluation kit (EV kit) demonstrates the standard 0A application circuit of the MAX706. This DC-DC converter steps down high-voltage batteries to generate low-voltage core
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