Intersil ISL282x6EVAL1Z Manuel utilisateur

AN1420.0

ISL282x6EVAL1Z Evaluation Board User’s Guide

Introduction

The ISL282x6EVAL1Z evaluation board is a design platform

containing all the circuitry needed to characterize critical

performance parameters of the ISL282x6 operational

amplifiers in both MSOP-8 and SOIC-8 packages, using a

variety of user defined test circuits.

The ISL28236 and ISL28246 high-speed operational

amplifiers feature low power consumption, while ISL28256

and ISL28266 operational amplifiers feature ultra-low power

consumption. All op amps have rail-to-rail output drive

capability and are designed to operate with a single lithium

cell or two Ni_Cd batteries.

Reference Documents

• ISL28236 Data Sheet

• ISL28246 Data Sheet

• ISL28256 Data Sheet

• ISL28266 Data Sheet

Evaluation Board Key Features

The ISL282x6EVAL1Z is designed to enable the IC to

operate from a single supply, +2.4VDC to +5.5VDC or from

split supplies, ±1.2VDC to ±2.75V. The board is configured

for a dual 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.

Power Supplies (Figure 1)

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

VREF and Ground connections on the evaluation board.

User selectable SMA edge connectors are also provided for

+V and -V. For single supply operation, the -V and Ground

pins are tied together to the power supply negative terminal.

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

respective power supply terminals. De-coupling capacitors

C2and C4connect to their respective supplies through R16

and R31 0Ωresistors. These resistors are 0Ωbut can be

changed by the user to provide additional power supply

filtering, or to reduce the voltage rate-of-rise to less than

±1V/µs. Two additional capacitors, C3and C5are connected

close to the part to filter out high frequency noise.

Anti-reverse diode D1protects the circuit in the case of

accidental polarity reversal.

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

J11

R31

R16

C2 C4

J14

J12 J13

0.01µF0.01µF

4.7µF4.7µF

VREF

V+V-

FIGURE 1. POWER SUPPLY CIRCUIT

IN-

IN+

VREF

IN -

IN +

GND

100k

REF

VOUT

ISL282x6 (1/2)

V-

VCM

IN-

IN+

VREF

V+

10k

100k

10k

FIGURE 2. BASIC AMPLIFIER CONFIGURATION

Application Note August 28, 2008

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.

2AN1420.0

August 28, 2008

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.

User-selectable Options (Figures 3 and 4)

Component pads are included to enable a variety of

user-selectable circuits to be added to the amplifier VREF,

inputs, outputs, and the amplifier feedback loops. The inputs

(Figure 3) have additional resistor and capacitor, and jumper

placements for loading and/or measurement of frequency

sensitive parameters.

The outputs (see Figure 4) have a 10kΩload resistor to

ground and have additional resistor and capacitor

placements for loading.

Note: Operational amplifiers are sensitive to output

capacitance and may oscillate. In the event of oscillation,

reduce output capacitance by using shorter cables or add a

resistor in series with the output.

FIGURE 3. INPUT STAGE (1/2) FIGURE 4. OUTPUT STAGE (1/2)

IN- OUTNODEIN+

J1 R1

R17

R2 R14

R18R15

R12R10

R13R11

DNP DNP

DNP

OPEN

DNP

10k 100k

100k

10k

VREF

TO OUTPUT

TO IN+

TO IN-

R26

R28

10k

OPEN

FROM OUTPUT

Application Note 1420

3AN1420.0

August 28, 2008

ISL282x6EVAL1Z Components Parts List

DEVICE # DESCRIPTION COMMENTS

C2, C4 CAP-TANTALUM, SMD, D, 4.7µF, 50V, 10%, LOW ESR, ROHS Power supply decoupling

C3, C5 CAP, SMD, 0603, 0.1µF, 25V, 10%, X7R, ROHS Power supply decoupling

C1, C6 thru C10 CAP, SMD, 0603, DNP-PLACE HOLDER, ROHS User-selectable capacitors - not

populated

D1 DIODE-SCHOTTKY BARRIER, SMD, SOT-23, 3P, 40V, ROHS Reverse power protection

U1 (ISL28236FUZ) IC-5 MHz RRIO OP AMP, 8P, MSOP, ROHS

U1 (ISL28236FBZ) IC-5 MHz RRIO OP AMP, 8P, SOIC, ROHS

U1 (ISL28246FUZ) IC-5 MHz RRIO OP AMP, 8P, MSOP, ROHS

U1 (ISL28246FBZ) IC-5 MHz RRIO OP AMP, 8P, SOIC, ROHS

U1 (ISL28256FUZ) IC-39µA RRIO OP AMP, 8P, MSOP, ROHS

U1 (ISL28256FBZ) IC-39µA RRIO OP AMP, 8P, SOIC, ROHS

U1 (ISL28266FUZ) IC-39µA RRIO OP AMP, 8P, MSOP, ROHS

U1 (ISL28266FBZ) IC-39µA RRIO OP AMP, 8P, SOIC, ROHS

R30, R32, R34 thru R36 RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER User selectable resistors - not

populated

R4, R16, R25 thru R27, R31 RES, SMD, 0603, 0Ω, 1/10W,TF, ROHS 0Ω user selectable resistors

R11, R14, R21, R24, R28, R29 RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS Gain and other user selectable

resistors

R13, R18, R19, R23 RES, SMD, 0603, 100k, 1/10W, 1%, TF, ROHS Gain resistors

Application Note 1420

4AN1420.0

August 28, 2008

Application Note 1420

FIGURE 5. ISL282x6EVAL1Z TOP VIEW (SOIC SHOWN)

Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to

verify that the Application Note or Technical Brief is current before proceeding.

For information regarding Intersil Corporation and its products, see www.intersil.com

AN1420.0

August 28, 2008

Application Note 1420

ISL282x6EVAL1Z Schematic Diagram

NODEBIN-A IN+BOUTANODEA IN-BOUTBIN+A

J11

R31

R16

R36

R32 R34

R35

R30

R20

C10

R4 R24

C2 C4

J15

J16

J14

J12

J13

R26

R27

C8C9

R29

R25

R23

R17

R28

R13R11

1U1

0.01µF0.01µF

4.7µF4.7µF

SOIC8

DNP

10k

OPEN

10k

OPEN

DNP

OPEN

DNP

OPEN

DNP

10k 10K100K 100k

100k 100k

10K 10k

0 DNP

VREF

V+V-

MSOP8

R15 R18 R19 R22

R21

R14

R10 R12

Table des matières

Autres manuels Intersil Carte mère

Intersil

Intersil ISL73033SLHEV1Z Manuel utilisateur

Intersil

Intersil ISL85014EVAL1Z Manuel utilisateur

Intersil

Intersil ISL2827xINEVAL1Z Manuel utilisateur

Intersil

Intersil ISL97684 Manuel utilisateur

Intersil

Intersil ISL55141 Manuel utilisateur

Intersil

Intersil ISL68137-61P-EV1Z Guide de configuration

Intersil

Intersil ISL70321SEHEV Z Series Manuel utilisateur

Intersil

Intersil ISL71831SEH Manuel utilisateur

Intersil

Intersil ISL8105BEVAL1Z Manuel utilisateur

Intersil

Intersil ISL70040SEHEV2Z Manuel utilisateur

Intersil

Intersil ISL73847SEHEV2Z Manuel utilisateur

Intersil

Intersil ISL54211EVAL1Z Manuel utilisateur

Intersil

Intersil ISL59420/21EVAL1 Manuel utilisateur

Intersil

Intersil ISL9220IRTZEVAL1Z Instructions d'installation et d'utilisation

Intersil

Intersil ISL6228EVAL3Z Manuel utilisateur

Intersil

Intersil ISL75051ASEHEV1Z Manuel utilisateur

Intersil

Intersil ISL8216MEVAL1Z Manuel utilisateur

Intersil

Intersil ZL2005P Manuel utilisateur

Intersil

Intersil ISL75052SEHEVAL1Z Manuel utilisateur

Intersil

Intersil QHx220 Manuel d'installation

Intersil

Intersil ISL28023EVAL1Z Manuel utilisateur

Intersil

Intersil ISL8200MEVAL1PHZ Manuel utilisateur

Intersil

Intersil ISL76534EVAL1Z Manuel utilisateur

Intersil

Intersil ZL6100EVAL2Z Instructions d'installation et d'utilisation

Manuels Carte mère populaires d'autres marques

DFI

DFI SD170 Manuel utilisateur

ASROCK

ASROCK ROMED8-2T Manuel utilisateur

Asus

Asus P2L97A Manuel utilisateur

Winmate

Winmate IC70 Manuel utilisateur

Asus

Asus MES-B Manuel utilisateur

Grantech

Grantech SYS8F377VGGA-3OMN Manuel utilisateur

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manuel utilisateur

Gigabyte

Gigabyte GA-9IVDT Manuel utilisateur

Texas Instruments

Texas Instruments ADS8372EVM Manuel utilisateur

Commell

Commell MS-C73 Manuel utilisateur

IBT Technologies

IBT Technologies MB860 Manuel utilisateur

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manuel utilisateur

Biostar

Biostar M7VIT Bravo Instructions d'utilisation et d'installation

Intel

Intel D33217CK Manuel utilisateur

Asus

Asus F1A55-M LX PLUS R2.0 Manuel utilisateur

EPC

EPC EPC9147C Manuel utilisateur

Asus

Asus EX-B760M-V5 D4 Manuel utilisateur

EPOX

EPOX MU-8KHA0010 Manuel utilisateur