EVAL-LTC2065-TQFN User Guide UG-1761 One Technology Way P.O. Box 9106 Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 www.analog.com Evaluating the LTC2065 2 A Supply Current, Low I , Zero-Drift, Op Amp B FEATURES EVALUATION BOARD PHOTOGRAPHS Fully featured evaluation board for the LTC2065 Enables efficient prototyping User defined circuit configuration Simplified connection to test equipment and other circuits EVALUATION KIT CONTENTS EVAL-LTC2065-TQFN EQUIPMENT NEEDED Dual-output dc power supply Dual-channel signal generator Oscilloscope Banana jack to grabber cables DOCUMENTS NEEDED LTC2065 data sheet GENERAL DESCRIPTION Figure 1. EVAL-LTC2065-TQFN, Primary Side The EVAL-LTC2065-TQFN evaluates the LTC2065 16-lead, quad- channel, lead frame chip scale package (LFCSP)/quad flat no-lead (QFN) operational amplifier (op amp). The EVAL-LTC2065- TQFN is a prepopulated board using a gain of 2 configuration with a low-pass filter at the noninverting input that has a cutoff frequency of 480 Hz. This pass band is sufficient for most input signals because of the slew rate limitation of the device. To minimize the effect of chopper clock feedthrough, limit signal bandwidths to at least a decade below the internal chopping frequency, which is 5 kHz for the LTC2065. The EVAL-LTC2065-TQFN design allows simplified and efficient use. Bulk test points are used for the inputs and outputs. The optimized EVAL-LTC2065-TQFN ground plane, component placement, and power supply allow maximum circuit flexibility and performance. The exposed pad, or EPAD, is shorted to the V pin (also connected to the VS turret), which is required for device operation. The EVAL-LTC2065-TQFN combines surface- mount technology (SMT) with almost all components being 0805 Figure 2. EVAL-LTC2065-TQFN, Secondary Side in size to provide simplified installation and the option to replace and solder when needed, except for the bypass capacitors (C1 For full specifications on the LTC2065, see the LTC2065 data to C4) that are fixed in 0603 sizes. The EVAL-LTC2065-TQFN sheet, which must be consulted in conjunction with this user also has unpopulated resistor and capacitor pads, which provide guide when using the EVAL-LTC2065-TQFN. the user with the options and flexibility to implement different application circuits and configurations, such as active loop filters, transimpedance amplifiers (TIAs), and sense amplifiers. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 Page 1 of 7 23178-002 23178-001UG-1761 EVAL-LTC2065-TQFN User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Power Supply Consideration .......................................................3 Evaluation Kit Contents .................................................................. 1 Initial Board Configuration .........................................................3 Equipment Needed ........................................................................... 1 Using the Evaluation Board for Testing ....................................3 Documents Needed .......................................................................... 1 Evaluation Board Schematics and Artwork ...................................4 General Description ......................................................................... 1 Ordering Information.......................................................................7 Evaluation Board Photographs ....................................................... 1 Bill of Materials .............................................................................7 Revision History ............................................................................... 2 Evaluation Board Quick Start Procedures .................................... 3 REVISION HISTORY 3/2020Revision 0: Initial Version Rev. 0 Page 2 of 7