ISL28291EVAL1Z Datasheet ISL28291EVAL1Z | P1-P3

AN1343.1

ISL2829xEVAL1Z, ISL5529xEVAL1Z

Evaluation Board User’s Guide

Introduction

The ISL2829xEVAL1Z, ISL5529xEVAL1Z evaluation board

is a design platform containing all the circuitry needed to

characterize critical performance parameters of the

ISL28290, ISL28291, ISL55290 and ISL55291 dual op

amps, using a variety of user defined test circuits.

The ISL2829x and ISL5529x amplifiers are dual high speed

operational amplifiers featuring low noise, low distortion, and

rail-to-rail output drive capability. They are designed to

operate with single and dual supplies from +5V (±2.5V)

down to +3V (±1.5V).

Reference Documents

• ISL28290 Data Sheet, FN6247

• ISL28291 Data Sheet, FN6156

• ISL55290 Data Sheet, FN6262

• ISL55291 Data Sheet, FN6263

Evaluation Board Key Features

The ISL2829xEVAL1Z, ISL5529xEVAL1Z is designed to

enable the IC to operate from a single supply (+3V to +5V),

or from split supplies (±1.5V to ±2.5V). Each op amp in the

dual package is independently configured for differential

input and for a closed loop gain of 10.

Power Supplies (Figure 1)

External power connections are made through the V

, V

and Ground connections on the evaluation board. For single

supply operation, the V

and Ground pins are tied together to

the power supply negative terminal. For split supplies V

and

terminals connect to their respective power supply

terminals. De-coupling capacitors C

, C

, connect to ground

through R

, R

, 0Ω resistors. Two additional capacitors,

and C

are placed close to the IC and provide additional

high frequency filtering. Anti-reverse diodes D

and D

protect the circuit in the case of accidental polarity reversal.

Amplifier Configuration (Figure 2)

The schematic of each of the 2 op amps with the

components supplied is shown in Figure 2. The op amp is

configured for low impedance, high speed inputs, and

included additional component pads to enable the user to

change the input characteristics to suit the application. A

series 50Ω back-termination is included for stable operation

when driving 50Ω cables.

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 inputs,

FIGURE 1. POWER SUPPLY CIRCUIT

1000PF

4.7UF

1000PF

4.7UF

-5V

+5V

R18R17

GND

1000pF

C6 C8

0.1µF 0.1µF

-5V +5V

-5V

GND

+5V

R17 R18

C5 C7

4.7µF

IN-

IN+

RFA, RFB

J1, J3

J2, J4

GND

R14, R32

VOUT(x)

1/2 ISL2829x, ISL5529x

V-

VCM

IN-

IN+

V+

R11, R29

499

(ISL2829x)

R12, R20

R4, R22

100

(ISL5529x)

4.99k

(ISL2829x)

1.00k

(ISL5529x)

4.99k

(ISL2829x)

1.00k

(ISL5529x)

499

(ISL2829x)

100

(ISL5529x)

FIGURE 2. BASIC AMPLIFIER CONFIGURATION

Application Note August 9, 2007

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.

AN1343.1

August 9, 2007

outputs and the amplifier feedback loops. The outputs

(Figure 3) have additional resistor and capacitance

placements for loading, and the inverting and non-inverting

inputs (Figure 4) have additional resistor placements and

auxiliary BNC connectors for added flexibility. ISL5529x op

amps are high bandwidth amplifiers and sensitive to

input/output parasitics. It is therefore crucial to use

appropriate cabling when working with these devices.

FIGURE 3. 1/2 OUTPUT STAGE

DNP

OPEN

R13

9.9

R16

TO VOUT

OUT

DNP

49.9

R8DNP

OPEN

R13 0 R16

DNP

OPEN

DNP

IN-A

R10

IN+A

DNP

R11

R12

R14

RGA

TO IN+

TO IN-

499 (ISL2829x)

100 (ISL5529x)

499 (ISL2829x)

100 (ISL5529x)

4.99k (ISL2829x)

1.00k (ISL5529x)

IN-

R2 DNP R3 DNP

RGA DNP

R11

IN+

DNP

R3 DNP R10 DNP

R12

R14

FIGURE 4. 1/2 INPUT STAGE

ISL2829xEVAL1Z, ISL5529xEVAL1Z Components Parts List

DEVICE NUMBER DESCRIPTION COMMENTS

C5, C7 CAP-TANTALUM,SMD, D, 4.7µF, 50V, 10%, LOW ESR, ROHS Power Supply Decoupling

C4, C9 CAP, SMD, 0603, 0.1µF, 25V, 10%, X7R, ROHS Power Supply Decoupling

C6, C8 CAP, SMD, 0603,1000pF, 25V, 10%, X7R, ROHS User selectable capacitors - not populated

C1-C3, C10-C12, CFA, CFB CAP, SMD, 0603, DNP-PLACE HOLDER, ROHS User selectable capacitors - not populated

D1, D2 DIODE-RECTIFIER, SMD, SOD-123, 2P, 40V, 0.5A, ROHS Reverse Power Protection

U1 (ISL28290EVAL1Z) ISL28290FUZ, IC-RAIL-TO-RAIL OP AMP, 10P, MSOP, ROHS

U1 (ISL28291EVAL1Z) ISL28291FUZ, IC-RAIL-TO-RAIL OP AMP, 10P, MSOP, ROHS

U1 (ISL55290EVAL1Z) ISL55290FUZ, IC-RAIL-TO-RAIL OP AMP, 10P, MSOP, ROHS

U1 (ISL55291EVAL1Z) ISL55291FUZ, IC-RAIL-TO-RAIL OP AMP, 10P, MSOP, ROHS

R1-R3, R6, R8-R10, R15, R16,

R19-R21, R24, R26-R28, R33,

R34, RGA, RGB

RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER User selectable resistors - not populated

R13, R17, R18, R31 RES, SMD, 0603, 0Ω, 1/16W, TF, ROHS 0Ω user selectable resistors

R4, R22 RES, SMD, 0603, 49.9Ω, 1/10W, 1%, TF,ROHS Output series resistors

R7, R25 RES, SMD, 0603, 10k, 1/10W, 1%, TF,ROHS Enable pull-up resistors

R14, R32, RFA, RFB RES, SMD, 0603, 4.99k, 1/10W, 1%, TF, ROHS (ISL2829x)

RES, SMD, 0603, 1.00k, 1/10W, 1%, TF, ROHS (ISL5529x)

R11, R12, R29, R30 RES, SMD, 0805, 499Ω, 1/8W, TF, ROHS (ISL2829x)

RES, SMD, 0805, 100Ω, 1/8W, TF, ROHS (ISL5529x)

Application Note 1343

AN1343.1

August 9, 2007

ISL2829xEVAL1Z, ISL5529xEVAL1Z Top View

P1-P3 P4-P4

ISL28291EVAL1Z

Mfr. #:

Buy ISL28291EVAL1Z

Manufacturer:

Renesas / Intersil

Description:

Amplifier IC Development Tools ISL28291 EVAL BRD 1 ROHS CMPL

Lifecycle:

New from this manufacturer.

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ISL28291EVAL1Z