Evaluates: MAX31091 MAX31091 Evaluation Kit General Description Features The MAX31091 evaluation kit (EV kit) is a fully assembled Easy Evaluation of the MAX31091 and tested PCB to evaluate the MAX31091 automotive +3.3V Single-Supply Operation temperature range spread-spectrum EconOscillator. Proven PCB Layout The EV kit operates from a single 3.3V supply. The EV kit also provides header pins to control the dither percentage Fully Assembled and Tested (no dither, 1%, 2%, and 4%). An SMA connector for the clock output is included to easily facilitate the connection of test equipment. Ordering Information appears at end of data sheet. EV Kit Contents Assembled circuit board including MAX31091AUA/V+033 EV Kit Photo EconOscillator is a trademark of Maxim Integrated Products, Inc. 319-100027 Rev 0 6/17Evaluates: MAX31091 MAX31091 Evaluation Kit 10) By setting the SEL1 and SEL0 at the positions showed Quick Start on Table 1, you can also see the spread spectrums Required Equipment and Accessories with 2.0% and 4.0% dither. One DC power supply capable of supplying +3.3V Detailed Description One multimeter for measuring the current The MAX31091 is a clock generator with selectable One spectrum analyzer dither magnitude and capable of output frequencies from One SMA cable 200kHz to 66.6MHz over the full automotive temperature range (-40C to +125C). The device can also produce MAX31091 EV kit a spread-spectrum (dithered) square-wave output using Procedure four pin-selectable dither percentages. The device also features two selectable dither rates. The EV kit is fully assembled and tested. Follow the steps below to verify board operation: The MAX31091 is shipped from the factory-programmed to a customer-specified frequency. Note: To configure the SEL0 and SEL1, 3 pin Headers, set the jumper to the right side of the header for 0 The MAX31091 can reduce radiated emission peaks. The position and left side for the 1 position dither percentage is controlled by the state of the SEL0 and SEL1 pins. The output frequency can be dithered 1) Place the EV kit on a nonconductive surface to ensure at 0%, 1%, 2%, and 4%, centered around the that nothing on the PCB is shorted to the workspace. programmed frequency. 2) With the output set to +3.3V and disabled, connect the positive terminal of the DC supply through a mutimeter to the red (VCC/+3.3V) and negative Table 1. Dither Magnitude terminal to black (GND) banana jacks of the DITHER MAGNITUDE MAX31091 EV kit. SEL1 SEL0 (%) 3) Connect an SMA Cable to the MAX31091 CLOCK LOGIC LEVEL LOGIC LEVEL MAX31091AUA OUTPUT SMA connector of the MAX31091 EV kit and connect the other end of the cable to the 0 0 No dither spectrum analyzer. 0 1 Q1 (1%) 4) Set the jumper on SEL1 on the position connected to 1 0 Q1 (2%) GND (0). 5) Set the jumper on SEL0 on the position connected to 1 1 Q1 (4%) GND (0). GND (0) position of the SEL1 and SEL0 set the Note: To configure the SEL0 and SEL1, 3 pin Headers, set the Device Output to the No dither mode. Table 1 shows jumper to the right side of the header for 0 position and left side for the 1 position the Dither Magnitude (percentage) of MAX31091AUA/V at different positions of the SEL1 and SEL0. 6) Set the center frequency of the spectrum analyzer to Table 2. MAX31091AUA/V ICs and Output 33.3MHz, reference level to 30dBm, and span = 10MHz. Frequencies Table 2 shows the OUTPUT Frequencies of the different parts. PART OUTPUT FREQUENCY (MHz) 7) Turn on the power supply. Supply Current should be MAX31091AUA/V+033 33.3 about 16mA 10% and spectrum analyzer should MAX31091AUA/V+T033 33.3 display a CW tone signal at 33.3MHz, if MAX31091AUA/ V+033 installed. Table 2 shows the Output frequency MAX31091AUA/V+066 66.6 of the different parts. MAX31091AUA/V+T066 66.6 8) Set the jumper on SEL0 on the position connected to MAX31091AUA/V+172 1.7 VCC (1). MAX31091AUA/V+T172 1.7 9) Leave the jumper on SEL1 on the position connected to GND (0). GND (0) position of the SEL1 and VCC (1) MAX31091AUA/V+200 0.20 position of the SEL0 set the Device Output to the 1% MAX31091AUA/V+T200 0.20 dither mode and spectrum analyzer displays a spread MAX31091AUA/V+330 33.0 spectrum centered at 33.3MHz and about 666KHz MAX31091AUA/V+T330 33.0 bandwidth ( 1.0%), if MAX31091AUA/V+033 installed. Maxim Integrated 2 www.maximintegrated.com