Evaluates: MAX44251 MAX44251 Evaluation Kit General Description Features The MAX44251 evaluation kit (EV kit) provides a proven S Accommodates Multiple Op-Amp Configurations design to evaluate the MAX44251 dual low-power, low- S Rail-to-Rail Inputs/Outputs drift operational amplifier (op amp) in an 8-pin SOT23 S Accommodates Easy-to-Use 0805 Components package. The EV kit circuit is preconfigured as noninvert- S 2.7V to 20V Power-Supply Range ing amplifiers, but can be adapted to other topologies by changing a few components. Low power, low drift, input S Proven PCB Layout offset voltage, and rail-to-rail input/output stages make S Fully Assembled and Tested this device ideal for applications requiring ultra-low noise and DC precision. The component pads accom- modate 0805 packages, making them easy to solder and replace. The EV kit comes with a MAX44251AKA+ installed. Ordering Information PART TYPE MAX44251EVKIT EV Kit Denotes RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION R3, R4, R7, R13, 0.1FF Q10%, 25V X7R ceramic 0 Not installed, resistors (0805) R14, R17 C1, C3 2 capacitors (0805) Murata GRM21BR71E104K R5, R15 2 10kI Q1% resistors (0805) R6, R8, R16, 4.7FF Q10%, 25V X5R ceramic 4 0I Q5% resistors (0805) R18 C2, C4 2 capacitors (0805) Murata GRM21BR61E475K Not installed, miniature test TP1, TP2 0 points C5C10, Functional DiagramsNot installed, ceramic 0 C15C20 capacitors (0805) Dual low-power, rail-to-rail I/O U1 1 op amp (8 SOT23) JU1, JU2, JU4, Maxim MAX44251AKA+ JU11, JU12, 6 2-pin headers, 0.1in centers JU14 8 Shunts JU3, JU13 2 3-pin headers, 0.1in centers PCB: MAX44251 EVALUATION 1 KIT R1, R2, R11, 4 1kI Q1% resistors (0805) R12 Component Supplier SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Note: Indicate that you are using the MAX44251 when contacting this component supplier. Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct 19-6285 Rev 0 4/12 at 1-888-629-4642, or visit Maxims website at www.maxim integrated.com.Evaluates: MAX44251 MAX44251 Evaluation Kit 4) Connect INAM to GND. Quick Start 5) Connect the positive terminal of the second preci- Required Equipment sion voltage source to the INBP pad. Connect the MAX44251 EV kit negative terminal of the precision voltage source to +5V, 10mA DC power supply (PS1) GND. Two precision voltage sources 6) Connect INBM to GND. Two digital multimeters (DMMs) 5) Connect the DMMs to monitor the voltages on OUTA and OUTB. With the 10k feedback resistors and Procedure 1k series resistors, the gain of each noninverting The EV kit is fully assembled and tested. Follow the steps amplifier is +11. below to verify board operation: 8) Turn on the +5V power supply. 1) Verify that the jumpers are in their default position, 9) Apply 100mV from the precision voltage sources. as shown in Table 1. Observe the output at OUTA and OUTB on the 2) Connect the positive terminal of the +5V supply to DMMs. Both should read approximately +1.1V. VDD and the negative terminal to GND and VSS. 10) Apply 400mV from the precision voltage sources. 3) Connect the positive terminal of the precision volt- Both OUTA and OUTB should read approximately age source to INAP. Connect the negative terminal +4.4V. of the precision voltage source to GND. Table 1. Jumper Descriptions JUMPER SHUNT POSITION DESCRIPTION Installed* Connects INAM to R1. Also shorts capacitor C5. JU1 Connects INAM to R1 through capacitor C5. When AC-coupling is desired, remove the Open shunt and install capacitor C5. Installed* Connects INAP to JU3 position 1. Also shorts capacitor C6. JU2 Connects INAP to JU3 position 1 through capacitor C6. When AC-coupling is desired, Open remove the shunt and install capacitor C6. 1-2* Connects INAP to JU2 and C6 through R2 and R8 JU3 2-3 Connects INAP to GND through R2 and R8 Installed* Connects OUTA to OUTA JU4 Connects OUTA to OUTA through capacitor C10. When AC-coupling is desired, remove Open the shunt and install capacitor C10. Installed* Connects INBM to R11. Also shorts capacitor C15. JU11 Connects INBM to R11 through capacitor C15. When AC-coupling is desired, remove the Open shunt and install capacitor C15. Installed* Connects INBP to JU13 position 1. Also shorts capacitor C16. JU12 Connects INBP to JU13 position 1 through capacitor C16. When AC-coupling is desired, Open remove the shunt and install capacitor C16. 1-2* Connects INBP to JU12 and C16 through R12 and R18 JU13 2-3 Connects INBP to GND through R12 and R18 Installed* Connects OUTB to OUTB JU14 Connects OUTB to OUTB through capacitor C20. When AC-coupling is desired, remove Open the shunt and install capacitor C20. *Default position. 2 Maxim Integrated