Click here for production status of specific part numbers. Evaluates: MAX40242 MAX40242 Evaluation Kit General Description Quick Start The MAX40242 evaluation kit (EV kit) provides a proven Required Equipment design to evaluate the MAX40242 low-input bias current, MAX40242 EV kit low-noise operational amplifier (op amp) in an 8-pin +5V, 10mA DC power supply (PS1) MAX package. The EV kit circuit is preconfigured as noninverting amplifiers, but can be adapted to other Two precision voltage sources topologies by changing a few components. The Two digital multimeters (DMMs) component pads accommodate 0805 packages, making them easy to solder and replace. The EV kit comes with a Procedure MAX40242ANA+ installed. The EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on Features power supplies until all connections are completed Accommodates Multiple Op-Amp Configurations and turn on V , V supplies before turning on DD SS voltage sources on the input pins. Rail-to-Rail Outputs 1) Verify that the jumpers are in their default position, as Accommodates Easy-to-Use 0805 Components shown in Table 1. 2.7V to 20V Single Supply or 1.35V to 10V Dual 2) Connect the positive terminal of the +5V supply to V DD Supplies and the negative terminal to GND test points. Proven PCB Layout 3) Connect the positive terminal of the precision voltage Fully Assembled and Tested source to INAP. Connect the negative terminal of the precision voltage source to GND. Ordering Information appears at end of data sheet. MAX40242 EV Kit Photo MAX is a registered trademark of Maxim Integrated Products, Inc. 319-100285 Rev 0 12/18Evaluates: MAX40242 MAX40242 Evaluation Kit 4) Connect the positive terminal of the second precision Detailed Description of Hardware voltage source to the INBP pad. Connect the negative The MAX40242 EV kit provides a proven layout for the terminal of the precision voltage source to GND. MAX40242 low input bias current, low-noise dual op amp. 5) Connect the Multimeters to monitor the voltages on The IC is a single-supply dual op amp whose primary OUTA and OUTB. With the 9k feedback resistors application is operating in the noninverting configuration and 1k series resistors, the gain of each noninverting however, the IC can operate with a dual supply as long as amplifier is +10V/V. the voltage across the V and GND pins of the IC do not DD 6) Turn on the +5V power supply. exceed the absolute maximum ratings. When operating with a single supply, short V to GND. 7) Apply 100mV from the precision voltage sources. SS Observe the output at OUTA and OUTB on the DMMs. Op-Amp Configurations Both should read approximately +1V. The IC is a single-supply dual op amp ideal for differential 8) Apply 450mV from the precision voltage sources. Both sensing, noninverting amplification, buffering, and filter- OUTA and OUTB should read approximately +4.5V. ing. A few common configurations are shown in the next Once the above steps are confirmed, the EV kit is tested few sections. for functionality. The following sections explain how to configure one of the devices op amps (op-amp A). To configure the devices second op amp (op-amp B), the same equations can be used after modifying the component reference designators. For op-amp B, the equations should be modified by Table 1. Jumper Descriptions (JU1JU8) JUMPER SHUNT POSITION DESCRIPTION Installed* Terminating Inverting input of CHA to GND through Gain Resistor JU1 Not Installed Floating Inverting input of CHA to GND through Gain Resistor Installed* For Non-Inverting configuration of CHA, apply Input on INAP JU2 Not Installed Floating Non-Inverting input of CHA Resistor 1-2* For Non-Inverting configuration on CHA JU3 2-3 Terminating Non-Inverting input of CHA to GND Install* Jumper to pass on signal from OUTA pin of CHA to OUTA test point JU4 Not Installed No signal on OUTA test point from OUTA pin Installed* Terminating Inverting input of CHB to GND through Gain Resistor JU5 Not Installed Floating Inverting input of CHB to GND through Gain Resistor Installed* For Non-Inverting configuration of CHB, apply Input on INBP JU6 Not Installed Floating Non-Inverting input of CHB 1-2* For Non-Inverting configuration on CHB JU7 2-3 Terminating Non-Inverting input of CHB to GND Install* Jumper to pass on signal from OUTB pin of CHB to OUTB test point JU8 Not Installed No signal on OUTB test point from OUTB pin Install* Single-supply operation JU9 Not Installed Float V pin to enable Split-supply operation SS *Default position. Maxim Integrated 2 www.maximintegrated.com