User

's Guide

SBOU110

– September 2011

LOG114EVM User Guide

This user's guide describes the characteristics, operation, and use of the LOG114EVM evaluation board. It

discusses how to set up and configure the board hardware, and reviews various methods of using the

evaluation module (EVM). Throughout this document, the terms evaluation board, evaluation module, and

EVM are synonymous with the LOG114EVM. This document also includes an electrical schematic, printed

circuit board (PCB) layout drawings, and a parts list for the EVM.

Contents

1

Overview

..................................................................................................................... 2

2

LOG114EVM

................................................................................................................ 3

3

Connecting to the LOG114EVM

.......................................................................................... 7

4

Using the LOG114EVM

................................................................................................... 11

5

Verifying Results

........................................................................................................... 12

6

LOG114EVM Documentation

............................................................................................ 13

List of Figures

1

LOG114EVM

................................................................................................................ 2

2

LOG114EVM Level Shifter

................................................................................................. 3

3

LOG114EVM Signal Path

.................................................................................................. 4

4

High-Current Linearity Correction Circuit

................................................................................ 5

5

LOG114EVM Complete Circuit

............................................................................................ 6

6

Connecting the 5V Power Supply

......................................................................................... 7

7

Using a Photodiode with the High-Current Linearity Correction Circuitry

........................................... 7

8

Using a Photodiode Without the High-Current Linearity Correction Circuitry

....................................... 8

9

Applying a 0.5-V Reverse Bias to the Photodiode

...................................................................... 8

10

Using a Resistor to Create an Input Current

............................................................................ 9

11

Using a Resistor and the High Current Linearity Correction Circuitry

.............................................. 10

12

LOG114EVM Components

............................................................................................... 11

13

LOG114EVM Measured Results

........................................................................................ 12

14

LOG114EVM Board Schematic

.......................................................................................... 13

15

LOG114EVM: Top Side Composite Drawing

.......................................................................... 14

16

LOG114EVM: Top Copper Layer

....................................................................................... 14

17

LOG114EVM: Bottom Copper Layer

.................................................................................... 14

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1

SBOU110

– September 2011

LOG114EVM User Guide

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