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Manual Texas Instruments SLOU106

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  • Texas Instruments SLOU106 - page 1

    February 2001 Mixed-Signal Products User ’ s Guide SLOU106 ...

  • Texas Instruments SLOU106 - page 2

    IMPORT ANT NOTICE T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify , before placing orders, that information being relied on is current and complete. All product ...

  • Texas Instruments SLOU106 - page 3

    iii Read This First Preface About This Manual This manual is written to provide information about the evaluation module of the fully differential amplifier under test. Additionally , this document provides a good example of PCB design for high speed applications. The user should keep in mind the following points. The design of the high-speed amplif ...

  • Texas Instruments SLOU106 - page 4

    Related Documentation From T exas Instruments iv 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. A warning statement describes ...

  • Texas Instruments SLOU106 - page 5

    Running Title—Attribute Reference v Chapter Title—Attribute Reference Contents 1 Introduction and Description 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Description 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Texas Instruments SLOU106 - page 6

    Running Title—Attribute Reference vi Figures 1–1 Schematic of the Populated Circuit on the EVM (Default Configuration) 1-3 . . . . . . . . . . . . . . 1–2 Schematic 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3 Fully-Differential In/Fully-Dif fer ...

  • Texas Instruments SLOU106 - page 7

    1-1 Introduction and Description Introduction and Description The T exas Instruments THS4140 evaluation module (EVM) helps designers evaluate the performance of the THS4140 operational amplifier . Also, this EVM is a good example of high-speed PCB design. This document details the T exas Instruments THS4140 high-speed operational amplifier evaluati ...

  • Texas Instruments SLOU106 - page 8

    Description 1-2 Introduction and Description 1.1 Description The THS4140 EVM is a good example of PCB design and layout for high-speed operational amplifier applications. It is a complete circuit for the high-speed operational amplifier . The EVM is made of the THS4140 high-speed operational amplifier , a number of passive components, and various f ...

  • Texas Instruments SLOU106 - page 9

    THS4140 EVM Specifications 1-3 Introduction and Description 1.3 THS4140 EVM Specifications Supply voltage range, ± V CC 5 V to ± 15 V (see the device data sheet) . . . . Supply current, I CC (see the device data sheet) . . . . . . . . . . . . . . . . . . . . . . . . Output drive, I O, V CC = ± 15 (see the device data sheet) . . . . . . . . . . . ...

  • Texas Instruments SLOU106 - page 10

    THS4140 EVM Schematic 1-4 Introduction and Description 1.5 THS4140 EVM Schematic Figure 1–2. Schematic ...

  • Texas Instruments SLOU106 - page 11

    Additional Sample Schematics 1-5 Introduction and Description 1.6 Additional Sample Schematics For verification of jumper locations and other bypass components, see the complete EVM schematic in Figure 1–2. Figure 1–3. Fully-Differential In/Fully-Differential Out, Without T ransformer + – THS4140 – + V CC V CC– V IN AC 0 Ω 0 Ω RX1 0 ? ...

  • Texas Instruments SLOU106 - page 12

    Additional Sample Schematics 1-6 Introduction and Description Figure 1–5. VICR Level Shifter + – THS4140 – + V CC 402 Ω 24.9 Ω 0 Ω V IN AC 0 Ω 0 Ω RX1 0 Ω R1b Rx0 374 Ω R3b R3a 374 Ω R6a C1 V OCM C4 C6 R4b R4a 0 Ω 0 Ω Rx4 Rx5 49.9 Ω 49.9 Ω R10 Rx6 50 Ω Source 402 Ω R6B RX3 49.9 Ω V CC RPU1 RPU2 V CC– Note: Shif ...

  • Texas Instruments SLOU106 - page 13

    THS4140 EVM Layout 1-7 Introduction and Description 1.7 THS4140 EVM Layout Figure 1–7. T op Layer (Silkscreen) TEXAS INSTRUMENTS THS4140 EVM REV_B Figure 1–8. T op (Layer 1) (Signals) TEXAS INSTRUMENTS THS4140 EVM REV_B ...

  • Texas Instruments SLOU106 - page 14

    THS4140 EVM Layout 1-8 Introduction and Description Figure 1–9. Internal Plane (Layer 2) (Ground Plane) Figure 1–10. Internal Plane (Layer 3) ( ± V CC Plane) ...

  • Texas Instruments SLOU106 - page 15

    THS4140 EVM Layout 1-9 Introduction and Description Figure 1–1 1. Bottom (Layer 4) (Ground and Signal) ...

  • Texas Instruments SLOU106 - page 16

    1-10 Introduction and Description ...

  • Texas Instruments SLOU106 - page 17

    2-1 Using the THS4140 EVM Using the THS4140 EVM It is recommended that the user perform the following exercises to learn the usage of the EVM. This practice helps the user learn about the various terminals on the EVM and their function. In addition, it suggests the components and equipment needed to operate the EVM. T opic Page 2.1 Required Equipme ...

  • Texas Instruments SLOU106 - page 18

    2-2 Using the THS4140 EVM 2.1 Required Equipment One double-output dc power supply ( ± 5 V , 100 mA output minimum) T wo dc current meters with resolution to 1 mA and capable of the maximum current the dc power supply can supply . If available, set the current limit on the dc power supply to 100 mA. Note: Some power supplies incorporate current me ...

  • Texas Instruments SLOU106 - page 19

    2-3 Using the THS4140 EVM 2.3 Input and Output Setup 1) Ensure that JU3, JU4, and JU1 are not installed (open circuit) . 2) Set the function generator to generate a 1 MHz, ± 0.5 V (1 V PP ) sine wave with no dc offset. 3) T urn of f the function generator before proceeding to the next step. 4) Using a BNC-to-SMA cable, connect the function generat ...

  • Texas Instruments SLOU106 - page 20

    2-4 Using the THS4140 EVM 2.4 T esting the EVM Setup 1) T urn on the dc power supply . 2) V erify that both the +5 V (current meter 1) and the –5 V (current meter 2) currents are below 20 mA. Caution: Currents above 20 mA indicate a possible short or a wrong resistor value on the PCB. Do not proceed until this situation is corrected. 3) T urn on ...

  • Texas Instruments SLOU106 - page 21

    2-5 Using the THS4140 EVM 2.5 Power Down V erification This EVM is used to evaluate devices with and without the shutdown function. Therefore, this step is only applicable if the device has a shutdown function. Please see the data sheet for power-down verification. 1) Insert the jumper JU1 to power down the device. The current consumption (dc curre ...

  • Texas Instruments SLOU106 - page 22

    Butterworth Filter 2-6 Using the THS4140 EVM Note: T ransformers are used to change the single ended signals to dif ferential signal or vice versa. On this EVM, they can be populated according to the application or the experiment. The V OCM pin of the device may be connected to the center-tap of the transformer , or maybe set via an external source ...

  • Texas Instruments SLOU106 - page 23

    THS4140 EVM Bill of Materials 2-7 Using the THS4140 EVM Figure 2–5. Gain vs Phase Butterworth filter with multiple feedback frequency response. V IN = –1 dBm R L = 200 Ω Diff V CC = ± 15 0 –4 –10 0.1 1 Gain – dB 2 6 f – Frequency – MHz 10 10 500 100 –8 –2 4 8 Phase Gain 2.8 THS4140 EVM Bill of Materials T able 2–1. THS4140 EV ...

  • Texas Instruments SLOU106 - page 24

    THS4140 EVM Bill of Materials 2-8 Using the THS4140 EVM T able 2–1. THS4140 EVM Bill of Materials (continued) Ref. Description Size Qty . Manufacturer Part Number R3a, R3b Resistor , 374 Ω , 1% 0805 2 Digi-Key P374CTR-ND R4a, R4b Resistor , 0 Ω , 1% 1206 2 Digi-Key P0.0ECT -ND R6a, R6b Resistor , 402 Ω , 1% 0805 2 Digi-Key P402CTR-ND R1 1 R ...

  • Texas Instruments SLOU106 - page 25

    3-1 General High-Speed Amplifier Design Considerations General High-Speed Amplifier Design Considerations The THS4140 EVM layout has been designed for use with high-speed signals and can be used as an example when designing PCBs incorporating the THS4140. Careful attention has been given to component selection, grounding, power supply bypassing, an ...

  • Texas Instruments SLOU106 - page 26

    3-2 General High-Speed Amplifier Design Considerations Finally , proper termination of all inputs and outputs must be incorporated into the layout. Unterminated lines, such as coaxial cable, can appear to be a reactive load to the amplifier . By terminating a transmission line with its characteristic impedance, the amplifier ’s load then appears ...

Manufacturer Texas Instruments Category Stereo Amplifier

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