Evaluates: MAX9613 19-5190 Rev 0 3/10 MAX9613 Evaluation Kit General Description Features The MAX9613 evaluation kit (EV kit) provides a proven S Accommodates Multiple Op-Amp Configurations design to evaluate the MAX9613 low-power, MOS-input Component Pads Allow for Sallen-Key Filter operational amplifier (op amp) in a 6-pin SC70 package. S Rail-to-Rail Inputs/Outputs The EV kit circuit is preconfigured as a noninverting S Accomodates Easy-to-Use 0805 Components amplifier, but can easily be adapted to other topologies by changing a few components. Low-power, low-input S Proven PCB Layout Vos, and rail-to-rail input/output stages make this device S Fully Assembled and Tested ideal for a variety of measurement applications. The component pads accommodate 0805 packages, making them easy to solder and replace. The EV kit comes with a MAX9613AXT+ installed. Ordering Information PART TYPE MAX9613EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION JU2 1 3-pin header 0.1FF Q10%, 16V X7R ceramic C1 1 capacitor (0603) R1, R2 2 1kI Q1% resistors (0805) Murata GRM188R71C104K R5 1 10kI Q1% resistor (0805) R6, R8 2 0I Q5% resistors (0805) 4.7FF Q10%, 6.3V X5R ceramic C2 1 VDD 1 Red multipurpose test point capacitor (0603) Murata GRM188R60J475K Single low-power, rail-to-rail I/O Not installed, ceramic capacitors op amp (6 SC70) C3, C4, C8, C9 0 U1 1 (0805) Maxim MAX9613AXT+ (Top Mark: +ADK) GND 2 Black multipurpose test points INM, INP, OUTA 3 White multipurpose test points 2 Shunts JU1 1 2-pin header PCB: MAX9613 EVALUATION 1 KIT+ Component Supplier SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Note: Indicate that you are using the MAX9613 when contacting this component supplier. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX9613 Evaluation Kit 7) Apply 400mV from the precision voltage source. Quick Start OUTA should read approximately +4.4V. Required Equipment MAX9613 EV kit Detailed Description of Hardware +5V, 10mA DC power supply (PS1) The MAX9613 EV kit provides a proven layout for the MAX9613 low-power, MOS-input op amp. The device Precision voltage source is a single-supply op amp that is ideal for buffering Digital multimeter (DMM) sensor signals. A Sallen-Key 2nd-order active filter, as described in the Sallen-Key Configuration section, is Procedure easily accomplished by changing and removing some The EV kit is fully assembled and tested. Follow the steps components. Various test points are included for easy below to verify board operation: evaluation. 1) Verify that jumpers JU1 and JU2 are in their default positions, as shown in Table 1. Op-Amp Configurations The device is a single-supply op amp that is ideal for 2) Connect the positive terminal of the +5V supply to the differential sensing, noninverting amplification, buffering, VDD test point and the negative terminal to the GND and filtering. A few common configurations are shown in test point closest to VDD. the next few sections. 3) Connect the positive terminal of the precision voltage Noninverting Configuration source to the INP test point. Connect the negative terminal of the precision voltage source to GND (GND The EV kit comes preconfigured as a noninverting ampli- fier with a gain of +11. The gain is set by the ratio of R5 or INM test points). and R1 (Figure 1). For a voltage applied to the INP test 4) Connect the DMM to monitor the voltage on the OUTA point, the output voltage for the noninverting configura- test point. With the 10kI feedback resistor (R5) and tion is given by the equation below: 1kI series resistor (R1), the gain is +11 (noninverting configuration). R 5 V = 1+ V OUT INP 5) Turn on the +5V power supply. R 1 6) Apply 100mV from the precision voltage source. Differential Amplifier Observe the output at OUTA on the DMM, which To configure the EV kit as a differential amplifier, replace should read approximately +1.1V. R1, R2, R , and R5 with appropriate resistors. When C3 R1 = R2 and R5 = R , the common-mode rejection C3 Table 1. EV Kit Jumper Descriptions (JU1, JU2) SHUNT R2 INP JUMPER DESCRIPTION R8 1kI POSITION 0I 1% 1 OUTA Connects the INM test point to 1-2* GND. 4 JU1 Isolates the INM test point from R6 3 Open INM 0I GND. Connects SHDN to VDD 1-2* (normal operation). R1 R5 JU2 1kI 10kI Connects SHDN to GND JU1 2-3 1% 1% (shutdown). *Default position. Figure 1. Default Noninverting Configuration with Gain +11 2 Evaluates: MAX9613