User's Guide SLOU334 – January 2012 THS4531DGKEVM Evaluation Module The THS4531DGKEVM is an evaluation module for the single THS4531 amplifier in the DGK [8-lead VSSOP (MSOP)] package. This evaluation module is designed to quickly and easily demonstrate the functionality and versatility of the amplifier. The EVM is ready to connect to power, signal source, and test instruments through the use of onboard connectors. The EVM comes configured for easy connection with common 50-Ω laboratory equipment on its inputs and outputs. The amplifier is configured for single-ended input with gain of 1 V/V to differential output at the device pins, which is converted to single-ended via a transformer to the output. It can be easily configured for other functions, gains, and single- or split-supply operation. Contents Features ...................................................................................................................... EVM Specifications ......................................................................................................... Power Connections ......................................................................................................... 3.1 Split-Supply Operation ............................................................................................ 3.2 Single-Supply Operation .......................................................................................... Input and Output Connections ............................................................................................ THS4531DGKEVM Schematic, Layout, and Bill of Materials ......................................................... 5.1 Schematic ........................................................................................................... 5.2 THS4531DGKEVM Layers ....................................................................................... 5.3 Bill of Materials ..................................................................................................... 1 2 3 4 5 1 1 2 2 2 2 3 3 4 5 List of Figures 1 THS4531DGKEVM Schematic ............................................................................................ 3 2 THS4531DGKEVM Layers 1 Through 4 ................................................................................. 4 List of Tables THS4531DGKEVM Bill of Materials ...................................................................................... 5 1 1 Features • • • • 2 Configured for split-supply operation and easily modified for single supply Default gain of 1 configuration can easily be reconfigured for other gains Designed for easy connection to standard 50-Ω input/output impedance test equipment Inputs and outputs include SMA connectors EVM Specifications Single-supply voltage range (VS– = ground) 2.5 V to 5.5 V VS± Split-supply voltage range ±1.25 V to ±2.75 V IS± Supply current 250 µA Input voltage VS±, Max Output drive ±25 mA IOUT SLOU334 – January 2012 Submit Documentation Feedback THS4531DGKEVM Evaluation Module Copyright © 2012, Texas Instruments Incorporated 1 Power Connections 3 www.ti.com Power Connections The THS4531DGKEVM is equipped with banana jacks for easy connection of power. The positive supply input is labeled VS+. The negative supply input is labeled VS–. Ground is labeled GND. 3.1 Split-Supply Operation To operate as split supply, apply the positive supply voltage to VS+, negative supply voltage to VS– , and the ground reference from supply to GND. 3.2 Single-Supply Operation To operate as single supply, connect jumper VS– to GND, and apply the positive supply voltage to VS+. Inputs and outputs must be biased per data-sheet specifications for proper operation. 4 Input and Output Connections The THS4531DGKEVM is equipped with SMA connectors for easy connection of signal generators and analysis equipment. As shipped, the EVM is configured for a gain of 1, split supply, single-ended input and output with 50-Ω termination. For best results, signals must be routed to and from the EVM with cables having 50-Ω characteristic impedance. VIN+ (J2) is the input connector for single-ended input signals. VOUT+ (J10) is the output connector for single-ended output signals. VIN- (J1) is not intended for use with single-ended input signals and has C1 and R6 added to approximate the impedance of an ac-coupled 50-Ω source and to balance the amplifier when VIN+ is driven from an ac-coupled, 50-Ω source. The amplifier converts the single-ended input to a differential signal at its output pins. A resistor network (R20, R21, R24) and transformer on the amplifier's output convert the differential signal to single-ended, provides 2-kΩ load to the amplifier when terminated in 50 Ω, and 50-Ω line impedance match at VOUT+. This results in loss, and the overall gain is approximately –38 dB. See the following THS4531 data-sheet applications section, schematics, and layouts for more detail and how to reconfigure the EVM. 2 THS4531DGKEVM Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLOU334 – January 2012 Submit Documentation Feedback www.ti.com THS4531DGKEVM Schematic, Layout, and Bill of Materials 5 THS4531DGKEVM Schematic, Layout, and Bill of Materials 5.1 Schematic Figure 1. THS4531DGKEVM Schematic SLOU334 – January 2012 Submit Documentation Feedback THS4531DGKEVM Evaluation Module Copyright © 2012, Texas Instruments Incorporated 3 THS4531DGKEVM Schematic, Layout, and Bill of Materials 5.2 www.ti.com THS4531DGKEVM Layers (a) Top Layer 1 (b) Ground Layer 2 (c) Ground Layer 3 (d) Bottom Layer 4 Figure 2. THS4531DGKEVM Layers 1 Through 4 4 THS4531DGKEVM Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLOU334 – January 2012 Submit Documentation Feedback THS4531DGKEVM Schematic, Layout, and Bill of Materials www.ti.com 5.3 Bill of Materials Table 1. THS4531DGKEVM Bill of Materials Item Description SMD Size Reference Designator PCB Qty. Manufacturer's Part No. 1 CAP, 10.0uF, CERAMIC, X5R, 16V 0805 C7, C10 2 (AVX) 0805YD106KAT2A 2 CAP, 0.1uF, CERAMIC, X7R, 16V 0603 C3, C4, C6, C11 4 (AVX) 0603YC104KAT2A 3 CAP, 0.22uF, CERAMIC, X7R, 10V 0603 C1 1 (AVX) 0603ZC224KAT2A 4 OPEN 0603 C2, C5, C12 3 5 OPEN 0805 C8, C9 2 6 OPEN 0603 R1, R2, R3, R7, R8, R9, R14, R15, R22, R23, R25, R26, R27, R30 13 7 RESISTOR, 0 OHM 0603 R28, R29 2 (ROHM) MCR03EZPJ000 8 RESISTOR, 49.9 OHM, 1/10W, 1% 0603 R6 1 (ROHM) MCR03EZPFX49R9 9 RESISTOR, 51.1 OHM, 1/10W, 1% 0603 R10, R11, R24 3 (ROHM) MCR03EZPFX51R1 10 RESISTOR, 976 OHM, 1/10W, 1% 0603 R20, R21 2 (ROHM) MCR03EZPFX9760 11 RESISTOR, 2K OHM, 1/10W, 1% 0603 R12, R13, R16, R17 4 (ROHM) MCR03EZPFX2001 12 RESISTOR, 10K OHM, 1/10W, 1% 0603 R18, R19 2 (ROHM) MCR03EZPFX1002 13 RESISTOR, 0 OHM 0805 R4, R5 2 (ROHM) MCR10EZPJ000 14 OPEN T1 1 15 TRANSFORMER, RF T2 1 (MINI-CIRCUITS) ADT1-1WT+ 16 JACK, BANANA RECEPTANCE, 0.25" DIA. HOLE J7, J8, J9 3 (SPC) 15459 17 OPEN J1, J3, J4, J5, J6, J11 6 18 CONNECTOR, EDGE, SMA PCB JACK J2, J10 2 (JOHNSON) 142-0701-801 19 HEADER, 0.1" CTRS, 0.025" SQ. PINS JP1 1 (SULLINS) PBC36SAAN 20 SHUNTS JP1 1 (SULLINS) SSC02SYAN 21 TEST POINT, RED TP1 1 (KEYSTONE) 5000 22 TEST POINT, BLACK TP2, TP3 2 (KEYSTONE) 5001 23 IC, THS4531 U1 1 (TI) THS4531IDGK 24 STANDOFF, 4-40 HEX, 0.625" LENGTH 4 (KEYSTONE) 1808 25 SCREW, PHILLIPS, 4-40, 0.250" 4 PMSSS 440 0025 PH 26 BOARD, PRINTED CIRCUIT 1 (TI) EDGE# 6528462 REV.A SLOU334 – January 2012 Submit Documentation Feedback 3 POS. THS4531DGKEVM Evaluation Module Copyright © 2012, Texas Instruments Incorporated 5 Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. 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TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or safety programs, please contact the TI application engineer or visit www.ti.com/esh. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. FCC Warning This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. EVM Warnings and Restrictions It is important to operate this EVM within the input voltage range of 2.5 V to 5.5 V and the output voltage range of 2.5 V to 5.5 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 85°C. The EVM is designed to operate properly with certain components above 85°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. 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