Evaluates: MAX9622/MAX9623 19-5046 Rev 0 11/09 MAX9622 Evaluation Kit General Description Features The MAX9622 evaluation kit (EV kit) provides a proven S 50MHz Gain-Bandwidth (GBW) Product design to evaluate the MAX9622 single, precision, high- S 2.0V to 5.25V Supply Range bandwidth op amp in a 5-pin SC70 package. The EV kit S Preconfigured for 10V/V Gain circuit is preconfigured as a differential amplifier provid- S Also Evaluates the MAX9623 (IC Replacement) ing an overall gain of 10V/V. BNC connectors are provid- ed for the board input/output, and the components have S 0603 Components pads that accommodate 0603 packages, making them S Fully Assembled and Tested easy to solder and replace. The EV kit also evaluates the MAX9623. Request a free sample of the MAX9623 IC from the factory when ordering the MAX9622 EV kit. Ordering Information PART TYPE MAX9622EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 50I BNC PCB vertical-mount 4.7FF Q10%, 6.3V X5R ceramic IN, OUT 2 connectors capacitor (0603) C1 1 Murata GRM188R60J475K R1 1 49.9I Q1% resistor (0603) TDK C1608X5R0J475K Not installed, resistorsPCB R2, R3, R8 0 short (0603) 1FF Q10%, 25V X5R ceramic R4, R5 2 1kI Q1% resistors (0603) capacitor (0603) C2 1 Murata GRM188R61E105K R6, R7 2 10kI Q1% resistors (0603) TDK C1608X5R1E105M High-bandwidth single op amp U1 1 (5 SC70) 0.1FF Q10%, 50V X7R ceramic Maxim MAX9622AXK+ capacitor (0603) C3 1 Murata GRM188R71H104K PCB: MAX9622 EVALUATION 1 TDK C1608X7R1H104K KIT+ Not installed, ceramic capacitors C4, C5, C6 0 (0603) 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.MAX9622 Evaluation Kit Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX9622 when contacting these component suppliers. R6 = R7, R4 = R5, and R2 = R3. The gain is simply given Quick Start by the following equation (eq. 1): Required Equipment 2.0V to 5.5V, 10mA DC power supply (VCC) R7 V = IN eq.1 OUT Oscilloscope R5+ R3 Signal generator The EV kit comes installed with R6 = R7 = 10kI, R4 = Procedure R5 = 1kI, and R2 = R3 = 0I. IN is the input voltage The MAX9622 EV kit is fully assembled and test- applied at the IN BNC connector. Modify the resistors as ed. Follow the steps below to verify board operation. required for different gains. Caution: Do not turn on the power supply until all For a fully differential configuration, the tolerance of connections are completed. resistors used greatly impacts the CMRR characteristics 1) This circuit requires a supply voltage of 2.0V to 5.5V. of the board. Use 0.1% resistors for enhanced common- For evaluation purposes, connect a 5.0V supply to mode rejection. To interface to a fully differential input the pad labeled VCC. signal with a common mode other than the EV kit ground, cut the trace connection between the power ground and 2) Connect the power-supply ground to the GND PCB the circuit ground. pad. 3) Connect the OUT BNC connector to an oscillo- Noninverting Gain scope. The EV kit can also be used to provide a simple nonin- verting gain to the input signal. Remove R6 and change 4) Turn on the power supply. R4 to a 0I resistor. The gain is then given by the follow- 5) Apply a signal at the IN BNC connector. ing equation (eq. 2): 6) Verify the output signal on the oscilloscope. R7 V = V 1 + eq.2 Detailed Description of Hardware OUT IN R5+ R3 The MAX9622 EV kit provides a proven layout for the MAX9622 precision, high-bandwidth op amp. The EV where R7 is installed as a 10kI resistor, R5 is installed kit circuit is preconfigured as a differential amplifier pro- as a 1kI resistor, R3 is a 0I PCB short, and V is the IN viding an overall gain of 10V/V. The signal is amplified input voltage at IN+ of the op amp. The EV kit provides through the op amp with the gain set by resistors R5 and a gain of 11V/V. R7. The device accepts a single-supply voltage from Capacitive Loads 2.0V to 5.5V. Some applications require driving large capacitive Op-Amp Configuration loads. To improve the stability of the amplifier in such cases, replace resistor R8 with a suitable resistor value Differential Amplifier Gain The EV kit comes configured as a differential amplifier to improve amplifier phase margin by isolating the load capacitor. The R8/C4 lowpass filter can also be used with G = 10. Gain is set by a ratio of R7 to (R5 + R3) if as an anti-alias filter or to limit amplifier output noise by reducing its output bandwidth. 2 Evaluates: MAX9622/MAX9623