THS4271EVM−UG Unity Gain User’s Guide DEVICE EVM TITLE USER’S GUIDE DESCRIPTION SHUTDOWN THS4271 THS4271EVM-UG THS4271 Unity Gain EVM Noninverting unity gain configuration only No THS4271 THS4271EVM THS4271/75EVM Configurable for gains ≥ +2/-1 No THS4275 THS4275EVM THS4271/75EVM Configurable for gains ≥ +2/-1 Yes October 2002 High Performance Linear Products SLOU147
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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.
EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the specified input and output ranges described in the EVM User’s Guide. The input supply voltage (±VS) should be no greater than ±7.5 V for dual supply (VS should be no greater than 15 V for single supply operation). The differential input signal (VID) should be no greater than ± 3 V. The output current (IO) should be no greater than 100 mA.
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. A warning statement describes a situation that could potentially cause harm to you. The information in a caution or a warning is provided for your protection.
Trademarks This EVM contains components that can potentially be damaged by electrostatic discharge. Always transport and store the EVM in its supplied ESD bag when not in use. Handle using an antistatic wristband. Operate on an antistatic work surface. For more information on proper handling, refer to SSYA008. Related Documentation From Texas Instruments The URL’s below are correct as of the date of publication of this manual. Texas Instruments applications apologizes if they change over time.
Contents Contents 1 Introduction and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 Evaluation Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Using the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 3 EVM Applications . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction and Description This EVM provides a platform for testing the THS4271 in 8-pin LLP (DRB) package in a noninverting, unity gain mode. It contains the high-speed op amp, a number of passive components, and various features and footprints that enable the user to experiment, test, and verify various operational amplifier circuit implementations.
Evaluation Schematic 1.1 Evaluation Schematic As delivered, the EVM has a fully functional example circuit—just add power supplies, a signal source, and monitoring instrument. See Figure 1–1 for a complete schematic diagram. EVM features include: - Wide operating supply voltage range: single supply 4.5 V to dual supply ±7.5 V operation (see the device data sheet). Single supply operation is obtained by connecting both J6 (GND) and J7 (VS-) to ground. - Nominal 50-Ω input impedance (R4).
Chapter 2 Using the EVM Figure 2-1 shows how to connect power supplies, signal source and monitoring instrument. It is recommended that the user connect the EVM as shown to avoid damage to the EVM or the op amp installed on the board. Figure 2-1.
Chapter 3 EVM Applications Example applications are presented in this chapter. These applications demonstrate the most popular circuits, but many other circuits can be constructed. The purpose of the EVM board is for the user to experiment with different circuits, exploring new and creative design techniques, which is the function of an evaluation board. 3.1 Default Configuration Figure 3-1. Default Configuration Vs+ J2 Vin+ 7 2 3 + R4 49.9 W 4 U1 6 R6 J4 Vout 453 W R7 49.
Default Configuration Changing R6 to 49.9 Ω allows the EVM to connect to a 50-Ω load. This amplifier is designed to attain optimum performance driving 500-Ω loads, but 100-Ω loads can be driven. See the data sheet for device characteristics. Figure 3-2. Noninverting Gain Stage Vs+ J2 Vin+ 7 2 3 U1 6 + R4 49.9 W 4 Vs- Note: 3-2 Power supply decoupling not shown.
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.
Figure 4-1.
