Evaluates: MAX9638 19-5577 Rev 0 9/10 MAX9638 Evaluation Kit General Description Features The MAX9638 evaluation kit (EV kit) provides a S Accommodates Noninverting and Differential proven design to evaluate the MAX9638 low-power, Op-Amp Configurations low-noise, CMOS input op amp, which is suitable for S Component Pads Allow for Lowpass and photodiode transimpedance front-ends in portable Highpass Sallen-Key Filter medical instruments. The EV kit circuit is preconfigured S Proven PCB Layout as a noninverting amplifier, but can easily be adapted S Fully Assembled and Tested to other topologies by changing a few components. The EV kit comes with a MAX9638AVB+ installed. Ordering Information PART TYPE MAX9638EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION R3, R4, R7, R9, 0.1FF Q10%, 16V X7R ceramic 0 Not installed, resistors (0603) R13, R14 C1, C3 2 capacitors (0603) Murata GCM188R71C104K R5, R10 2 10kI Q1% resistors (0603) R6, R8, 4.7FF Q10%, 16V X7R ceramic 4 0I Q5% resistors (0603) R11, R12 C2, C4 2 capacitors (0805) Murata GRM21BR71C475K TP1TP8 8 Red test points Not installed, ceramic Dual low-power, rail-to-rail I/O C5, C6, C10, 0 capacitorsshorted by PCB U1 1 op amp (10 UTQFN) C11, C12, C16 trace (0603) Maxim MAX9638AVB+ 4 Shunts (JU1JU4) C7, C8, C9, Not installed, ceramic 0 C13, C14, C15 capacitors (0603) PCB: MAX9638 EVALUATION 1 KIT+ JU1JU4 4 3-pin headers R1, R2, 4 1kI Q1% resistors (0603) R15, R16 Component Supplier SUPPLIER PHONE WEBSITE Murata Electronics North America 770-436-1300 www.murata-northamerica.com Note: Indicate that you are using the MAX9638 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.MAX9638 Evaluation Kit Quick Start Detailed Description of Hardware The MAX9638 EV kit provides a proven design to Required Equipment evaluate the MAX9638 low-power, low-noise, CMOS MAX9638 EV kit input op amp, which is suitable for photodiode tran- 3.3V DC power supply (e.g., Agilent E3620A) simpedance front-ends in portable medical instruments. Precision voltage source The EV kit circuit is preconfigured as a noninverting amplifier, but can easily be adapted to other topologies Digital multimeter (DMM) by changing a few components. Procedure Op-Amp Configurations The EV kit is fully assembled and tested. Follow the steps The device is a single-supply op amp that is ideal for below to verify board operation: differential sensing, noninverting amplification, buffering, 1) Connect the positive terminal of the power supply to and filtering. A few common configurations are shown in the VDD pad and the ground terminal to the nearest the next few sections. GND and VSS pads. Noninverting Configuration 2) Connect the positive terminal of the precision voltage The EV kit comes preconfigured as a noninverting ampli- source to INAP (TP2). Connect the negative terminal fier. The gain is set by the ratio of R5 and R1 for op amp of the precision voltage source to the GND pad. A and R10 and R15 for op amp B. The EV kit comes pre- 3) Connect the INAM (TP1) to the GND pad. configured for a gain of 11 on both op amps. The output 4) Connect the DMM to monitor the voltage on OUTA voltage for the noninverting configuration is given by the (TP4). With the 10kI feedback resistor (R5) and 1kI equation below: series resistor (R1), the gain is 11 (noninverting con- R5 figuration). V = (1+ )(V + V ) OUTA INAP OS R1 5) Turn on the 3.3V power supply. and 6) Apply 100mV from the precision voltage source. Observe the output at OUTA on the DMM. OUTA R10 should read approximately 1.1V. V = (1+ )(V + V ) OUTB INBP OS R15 7) Apply 200mV from the precision voltage source. OUTA should read approximately 2.2V. Table 1. Jumper Descriptions (JU1JU4) JUMPER SHUNT POSITION DESCRIPTION 1-2* Connects SHDNA of the device to VDD to put U1-A (op amp A) in normal operation. JU1 2-3 Connects SHDNA of the device to VSS to put op amp A in shutdown mode. 1-2* Connects SHDNB of the device to VDD to put U1-B (op amp B) in normal operation. JU2 2-3 Connects SHDNB of the device to VSS to put op amp B in shutdown mode. 1-2* Connects INA+ to INAP (TP2) through R2 and R8. JU3 2-3 Connects INA+ to GND through R2 and R8. 1-2* Connects INB+ to INBP (TP6) through R12 and R16. JU4 2-3 Connects INB+ to GND through R12 and R16. *Default position. 2 Evaluates: MAX9638