Datasheet > ISL281X7MSOPEVAL1Z

ISL281X7MSOPEVAL1Z

更新时间： 2024-09-15 11:11:47

品牌	Logo	应用领域
英特矽尔 - INTERSIL		/
页数	文件大小	规格书
4页	248K
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Evaluation Board User’s Guide

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Application Note 1565

ISL281X7MSOPEVAL1Z Evaluation Board User’s Guide

tied together to the power supply negative terminal. For

split supplies, +V and -V terminals connect to their

The ISL281X7MSOPEVAL1Z evaluation board is a design

respective power supply terminals. De-coupling

Introduction

platform containing all the circuitry needed to

characterize critical performance parameters of the

capacitors C2 and C4 connect close to their respective

supplies, while two additional capacitors, C1 and C5, are

ISL281X7 operational amplifiers in MSOP-8 package,

connected close to the part to filter out high frequency

using a variety of user defined test circuits.

noise. Anti-reverse diodes D1 and D2 protect the circuit

in the case of accidental polarity reversal.

The ISL281X7 operational amplifiers feature low bias

current, low noise, and low offset and temperature drift.

V-

V+

VREF

Reference Documents

• ISL28107 Data Sheet, FN6631

• ISL28117 Data Sheet, FN6632

• ISL28127 Data Sheet, FN6633

4.7µF

Evaluation Board Key Features

S1AB

The ISL281X7MSOPEVAL1Z is designed to enable the IC

to operate from a single supply, +4.5VDC to +40VDC or

from split supplies, ±2.25VDC to ±20V. The board is

configured for a single op amp connected for differential

input with a closed loop gain of 10. A single external

reference voltage (VREF) pin and provisions for a

user-selectable voltage divider-filter are included.

FIGURE 1. POWER SUPPLY CIRCUIT

Amplifier Configuration (Figure 2)

The schematic of 1/2 of the op amp with the components

supplied is shown in Figure 2. The circuit implements a

differential input amp with a closed loop gain of 10. The

circuit can operate from a single supply or from dual

supplies. The VREF pin must be connected to ground to

establish a ground referenced input for dual supply

operation, or can be externally set to any reference level for

single supply operation. VREF should not be left floating.

Power Supplies (Figure 1)

External power connections are made through the +V, -V,

VREF and Ground connections on the evaluation board.

For single supply operation, the -V and Ground pins are

ISL281X7

100kΩ

IN -

RIN-

IN-

0Ω

V+

V-

10k

VOUT

RIN+

IN+

10kΩ

IN +

VREF

VCM

RREF+

DNP

100kΩ

GND

VREF

FIGURE 2. BASIC AMPLIFIER CONFIGURATION

May 25, 2010

AN1565.0

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

12 3 4

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