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Summary of Contents for Texas Instruments THS6132EVM
- Page 1 THS6132EVM User’s Guide November 2002 High Performance Linear Products SLOU154...
- Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
- Page 3 EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods.
- Page 4 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. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2002, Texas Instruments Incorporated...
- Page 5 Information About Cautions and Warnings Preface Read This First Information About Cautions and Warnings This book may contain cautions and warnings. This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software or equipment. This is an example of a warning statement.
- Page 6 Application report (SLMA002), PowerPAD Thermally Enhanced Package, http://www-s.ti.com/sc/psheets/slma004/slma002.pdf Application report (SLMA004), PowerPAD Made Easy, http://www-s.ti.com/sc/psheets/slma004/slma004.pdf Application report (SSYA008), Electrostatic Discharge (ESD), http://www-s.ti.com/sc/psheets/ssya008/ssya008.pdf Application report (SLOA100), Active Output Impedance for ADSL Line Drivers, http://www-s.ti.com/sc/psheets/sloa100/sloa100.pdf Trademarks PowerPAD is a trademark of Texas Instruments.
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Page 7: Table Of Contents
..........THS6132EVM Operating Conditions . - Page 8 Contents Figures Full Schematic of the Populated Circuit on the THS6132EVM (Default Configuration) Interconnection Diagram ............
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Page 9: Introduction And Description
EVM. The schematics and the bill of materials indicate any differences associated with the two packages. This document details the THS6132EVM. It includes a list of EVM features, a brief description of the module illustrated with a series of schematic diagrams, EVM specifications, details on connecting and using the EVM, and a discussion of high-speed amplifier design considerations. -
Page 10: Evaluation Module Features
Evaluation Module Features 1.1 Evaluation Module Features The THS6132EVM provides a platform for developing high-speed operational amplifier application circuits. It contains the THS6132 high-speed dual operational amplifier, a number of passive components, and various features and footprints that enable the user to experiment with, test, and verify various operational amplifier circuit implementations. -
Page 11: Full Schematic Of The Populated Circuit Interconnection The Ths6132Evm (Default Cinterconnectionfiguratiinterconnection)
EVM Default Configuration Figure 1-1. Full Schematic of the Populated Circuit on the THS6132EVM (Default Configuration) THS6132 2 (4) OUT1 15 (23) 14 (21) 12.4 W 49.9 W 49.9 W 1 kW 0.1 mF 500 W 1 kW THS6132 12 (20) -
Page 13: Using The Ths6132Evm
Chapter 2 Using the THS6132EVM This section describes how to connect the THS6132EVM to test equipment. It is recommended that the user connect the EVM as described in this section to avoid damage to the EVM or the THS6132 installed on the board. - Page 14 Figure 2-1 shows the connections to measure the output signal of output 1 while a single-ended signal is inserted into EVM channel 1’s noninverting input. If the oscilloscope input is connected to J3 and the signal source is connected to J2, EVM channel 2 is also configured for a noninverting signal path.
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Page 15: Ths6132Evm Applications
Chapter 3 THS6132EVM Applications Example applications are presented in this chapter. These applications demonstrate the most popular circuits, but many other circuits can be constructed. The user is encouraged to experiment with different circuits, exploring new and creative design techniques. -
Page 16: Standard Gain Configuration
Standard Gain Configuration 3.1 Standard Gain Configuration The THS6132EVM default configuration is a fully differential input, fully differential output gain of about 2.2 (at the output connectors using an instrument with 50-Ω load on each input). A simplified schematic is shown in Figure 3-1. -
Page 17: Active Termination
Vout+ R12 = Rp 2 k W R11 = RF 12 k W R15 = Rs Vin2 12.4 W THS6132 49.9 W Note: Component pin numbers shown are for THS6132RGW while pin numbers in parentheses are for THS6132VFP. THS6132EVM Applications... - Page 18 The reader is cautioned that active termination is a very complex topic, with many considerations. Carefully read the Texas Instruments Application Report Active Output Impedance for ADSL Line Drivers, (SLOA100) to gain a more complete understanding of the topic and all the subtle implications of active termination.
- Page 19 As a rule of thumb, to select the proper snubber values, select: LINE R19 + 2 Then select C5: C1 + where F = at least 10X the highest operating frequency (1.104 MHz is the highest ADSL operating frequency). 20X or even larger may be preferable. THS6132EVM Applications...
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Page 20: Receive Path Implementation
The user should know their nominal line impedance characteristics and thus should be able to match them better. Texas Instruments does have an EVM that contains a THS6062 ADSL receiver, and this EVM can be purchased separately to facilitate construction of a complete ADSL transmit/receive interface. -
Page 21: High-Pass Filter
This helps (but does not assure) the signals are truly differential. Figure 3-4 compares the frequency spectrum of ADSL to a simulation of the high-pass filter on the THS6132EVM. Figure 3-4. ADSL Spectrum and High-Pass Filter Response (Above not on a logarithmic scale) Note that the high-pass filter function is not a true high-pass filter. -
Page 22: Single-Ended To Differential Conversion
Single-Ended to Differential Conversion 3.5 Single-Ended to Differential Conversion The circuit shown in Figure 3-1 is used for single-ended to differential conversion by grounding one input and supplying a single-ended signal to the other input. Because one amplifier is configured as a noninverting amplifier and the other as an inverting circuit, the gain of the noninverting channel is one greater than the other. -
Page 23: Single-Ended Gain Stages
1 kW 1 kW 1 kW 1 kW OUT2 12 (20) 11 (18) 3 (5) 49.9 W 24.9 W THS6132 49.9 W Note: Component pin numbers shown are for THS6132RGW while pin numbers in parentheses are for THS6132VFP. THS6132EVM Applications... -
Page 24: Evm Hardware Description
Chapter 4 EVM Hardware Description This chapter describes the EVM hardware. It includes the EVM parts list, and printed circuit-board layout. Table 4-1. THS6132EVM Bill of Material Reference Size Designator Item Description Manufacturer’s Part # Distributor’s Part # Bead, ferrite, 3A, 80 Ω... -
Page 25: Top Layer 1 (Signals For Ths6132Evm)
Standoff, 4-40 hex, 0.625” length (Keystone) 1804 (Allied) 839-2089 Screw, Phillips, 4-40, .250” SHR-0440-016-SN See Table 4-2 See Table 4-2 Table 4-2. THS6132EVM Bill of Material for Items 25 and 26 Part Number Part Nmuber VFP Package RGW Package Item Description... -
Page 26: Internal Plane (Layer 2) (Ground 1 Plane)
Figure 4-2. Internal Plane (Layer 2) (Ground 1 Plane) Figure 4-3. Internal Plane (Layer 3) (Power Plane) EVM Hardware Description... - Page 27 Figure 4-4. Bottom (Layer 4) (Ground and Signal)
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