LMH730316/NOPB

User's Guide SNOA556B – November 2010 – Revised May 2013 AN-2095 LMH730316 SOT23-5/SOT23-6 High Performance Amplifier Evaluation Board 1 General Description The LMH730316 evaluation board is designed to aid in the characterization of Texas Instruments high speed and low distortion operational amplifiers, and is sold without any components installed for easy application adoption. This four layer board is designed to improve speed and reduce harmonic distortion by careful placement and routing of components and traces. Use the evaluation board as a guide for high frequency layout and as a tool to aid in device testing and characterization. 2 Basic Operation This evaluation board supports both inverting and non-inverting configurations. For component locations, see the schematic in Figure 1 . Note that the pin numbers correspond to the SOT23-6 package. For the SOT23-5 package, schematic pin 6 (VCC) is normally called pin 5 and schematic pin 5 does not exist (open). The board uses end mounted SMA connectors. On the +IN input, resistor RINa provides input termination. The resistors RTp and RINb are normally open and short, respectively, and are included for added flexibility (for example, filtering, divider/attenuation, and so forth) in configuring the amplifier. When using the evaluation board for non-inverting applications, load resistor RGa only (RGb and RTn left open). The resistors RGb and RTn are for use in the inverting configuration. When using this board for inverting applications, do not load RGa; instead load RGb and an appropriate value of RTn. Ro and RTo resistors comprise the output connection network that is usually configured for 50 Ω operation (Ro= 50 Ω, RTo = open). Several components are mounted on the board bottom, while the DUT is installed on the top layer, for best performance. Here is a list of these components: Rf, RGa, C4, and RGND. For SOT23-6 devices with schematic pin 5 used for the disable function, resistor RTdis can be used (normally 50 Ω) while an input at J4 can act as a disable signal. For a SOT23-5 device, schematic pin 5 is non-existent and the said components are thus “don’t care”. All board components are the SMT 0603 type, except the following listed in Table 1 Table 1. Board Components Which are not "0603" Type Reference Designator Description D1 Schottky diode, 1N5859, 40 V (or equivalent) RGND Shorting jumper (single supply operation only) All trademarks are the property of their respective owners. SNOA556B – November 2010 – Revised May 2013 Submit Documentation Feedback AN-2095 LMH730316 SOT23-5/SOT23-6 High Performance Amplifier Evaluation Board Copyright © 2010–2013, Texas Instruments Incorporated 1 Basic Operation www.ti.com Diode D1 (optional) is meant as protection to clamp the supplies in case VCC and VEE are accidentally reversed. For single-supply operation (VCC), short RGND to connect VEE to GND and do not power VEE pins on J5. When using a single supply, it is important to pay attention to DC bias voltages. This board consists of four layers. All four layers are detailed in Figure 2 through Figure 5. Figure 1. Evaluation Board Schematic 2 AN-2095 LMH730316 SOT23-5/SOT23-6 High Performance Amplifier Evaluation Board SNOA556B – November 2010 – Revised May 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Basic Operation www.ti.com Figure 2. Evaluation Board Top Layer Figure 3. Evaluation Board Bottom Layer (bottom view) SNOA556B – November 2010 – Revised May 2013 Submit Documentation Feedback AN-2095 LMH730316 SOT23-5/SOT23-6 High Performance Amplifier Evaluation Board Copyright © 2010–2013, Texas Instruments Incorporated 3 Basic Operation www.ti.com Figure 4. Evaluation Board Layer 2 (bottom view) Figure 5. Evaluation Board Layer 3 (bottom view) 4 AN-2095 LMH730316 SOT23-5/SOT23-6 High Performance Amplifier Evaluation Board SNOA556B – November 2010 – Revised May 2013 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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