Overview

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1

Overview

The LOG114 is a single-supply, high-speed, precision logarithmic amplifier. This device computes the

logarithm or log-ratio of an input current or voltage relative to a reference current or voltage. The

LOG114EVM (shown in Figure 1) is a ready-to-use platform for evaluating the performance of the

LOG114 in various configurations. This document gives a general overview of the LOG114EVM, and

provides a general description of the features and functions to be considered while using this evaluation

module.

Figure 1. LOG114EVM

1.1

Getting Started

Tested at the factory over a wide range of input currents, the LOG114EVM comes ready to use and

includes this Quick Start User

’s Guide. Use of the LOG114EVM requires a 5-V power source, an input

source such as a photodiode or resistor, and a digital voltmeter or oscilloscope.

1.2

Related Documentation from Texas Instruments

The following documents provide information regarding Texas Instruments' integrated circuits and support

tools for the LOG114EVM. This user's guide is available from the TI web site under literature number

SBOU110. Any letter appended to the literature number corresponds to the document revision that is

current at the time of the writing of this document. Newer revisions may be available from the TI web site,

or call the Texas Instruments' Literature Response Center at (800) 477-8924 or the Product Information

Center at (972) 644-5580. When ordering, identify the document by both title and literature number.

Related Documentation

Document

Literature Number

LOG114 Product Data Sheet

SBOS301

LOG114 TINA-TI Reference Design

SBOM384B

LOG114 TINA-TI Spice Model

SBOM385B

2

LOG114EVM User Guide

SBOU110

– September 2011

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