USER’S MANUAL
AN1339
Rev 0.00
July 23, 2007
ISL284xxEVAL1Z
Evaluation Board User Guide
AN1339 Rev 0.00 Page 1 of 5
July 23, 2007
Introduction
The ISL284xxEVAL1Z evaluation board is a design platform
containing all the circuitry needed to characterize critical
performance parameters of the ISL28470 quad
instrumentation amplifier using a variety of user defined test
circuits.
The ISL284xx are quad 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 +5VDC (±2.5VDC) down to +2.4VDC (±1.2VDC).
Reference Documents
• ISL28476 Data Sheet, FN6301
• ISL28478 Data Sheet, FN6339
• ISL28486 Data Sheet, FN6312
• ISL28488 Data Sheet, FN6339
Evaluation Board Key Features
The ISL284xxEVAL1Z is designed to enable the IC to
operate from a single supply (+2.4VDC to +5VDC), or from
split supplies (±1.2VDC to ±2/5V). The board is configured
for 4 independent op amps 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 is included).
Power Supplies (Figure 1)
External power connections are made through the V+, V-
and GND connections on the evaluation board. For single
supply operation, the V- and GND 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 C1 and C2, connect to
GND through R1 and R2, 0 resistors. Resistors R3 and R4
are 0 but 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. Anti-reverse diodes D1 and D2 protect the
circuit in the case of accidental polarity reversal.
Amplifier Configuration (Figure 2)
The schematic of each of the 4 op amps 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 2.4VDC to
+5VDC supply, or from dual supplies from ±1.2VDC to
±2.5VDC. The VREF pin can be connected to ground to
establish a ground referenced input for split supply
operation, or can be externally set to any reference level for
single supply operation.
2
0
4.7UF
0.1UF
0
00
4.7UF
VM
VP
C4
12
R37
J3
1
C2 12
R44
J2
1
R1 C1 12
C3
12
R48
J1
1
D2
1
D1
21
V- V+
FIGURE 1. POWER SUPPLY CIRCUIT
+
IN-
IN+
RF
VREF
IN(A,B,C,D)-
IN(A,B,C,D)+
GND
100k
RREF(A,B,C,D)+
10k
VOUT(x)
1/4 ISL284xx
VP
V-
10k
0
VM
VCM
IN-
IN+
VREF
V+
RIN-
10k
RIN+
10k
-
+
0
TO OTHER CHANNELS
100k
0
FIGURE 2. BASIC AMPLIFIER CONFIGURATION
AN1339 Rev 0.00 Page 2 of 5
July 23, 2007
ISL284xxEVAL1Z
User-selectable Options (Figure 3)
Component pads are included to enable a variety of
user-selectable circuits to be added to the amplifier inputs,
the VREF input, and the amplifier feedback loops. A voltage
divider and filter option can be added to establish a power
supply-tracking common mode reference at the VREF input.
The inverting and non-inverting inputs have additional
resistor placements for adding input attenuation, or to
establish input DC offsets through the VREF pin.
.
RREFA-
RINA2-
RREFA+
RINA+
RINA-
RGA+
RINA1+
OPEN
5
DNP
DNP
IN-A
DNP
DNP
J6
1
2
3
4
C7
12
R21
R15
J5
1
2
3
4
5
R2
R11
12
0
R20
IN+A
100K
R24
OPEN
C6R6
0
R28
DNP
R14
10K
R5
10K
RREF
4.7UF
10K
0
R33
C5 12
R32
J4
1
REF1
IN(A,B,C,D)-
IN(A,B,C,D)+
FIGURE 3. COMPONENT-SELECTABLE OPTIONS
ISL284xxEVAL1Z Components Parts List
DEVICE NUMBER DESCRIPTION COMMENTS
C1, C2, C5 CAP-TANTALUM, SMD, D, 4.7µF, 50V, 10% LOW ESR, ROHS Power Supply Decoupling
C3, C4 CAP, SMD, 0603, 0.1µF, 25V, 10%, X7R, ROHS Power Supply Decoupling
C6-C25 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 (ISL28476EVAL1Z) ISL28476FAZ, IC-RAIL-TO-RAIL PRECISION OP AMP, 16P, QSOP, ROHS
U1 (ISL28478EVAL1Z) ISL28478FAZ, IC-RAIL-TO-RAIL PRECISION OP AMP, 16P, QSOP, ROHS
U1 (ISL28486EVAL1Z) ISL28486FAZ, IC-RAIL-TO-RAIL PRECISION OP AMP, 16P, QSOP, ROHS
U1 (ISL28488EVAL1Z) ISL28488FAZ, IC-RAIL-TO-RAIL PRECISION OP AMP, 16P, QSOP, ROHS
R2-R4, R11-R13, R20-R23, R25,
R26, R28, R30, R31, R34, R38,
R42, R43, R46, R55-R58,
R59-R62
RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER User selectable resistors - not
populated
R6, R8, R10, R15, R17, R19, R36,
R41, R51-R54, R63-R66
RES, SMD, 0603, 0, 1/16W,TF, ROHS 0 user selectable resistors
R5, R7, R9, R14, R16, R18, R33,
R35, R40, R67-R70
RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS RG gain resistors
R24, R27, R29, R39, R45, R47,
R49, R50
RES, SMD, 0603, 100k, 1/10W, 1%, TF, ROHS RF gain resistors
R1, R32, R37, R44, R48 RES, SMD, 0805, 0, 1/8W, TF, ROHS 0 user selectable resistors
AN1339 Rev 0.00 Page 3 of 5
July 23, 2007
ISL284xxEVAL1Z
ISL28xxEVAL1Z Top View
AN1339 Rev 0.00 Page 4 of 5
July 23, 2007
ISL284xxEVAL1Z
ISL284XXEVAL1Z Schematic Diagram
RREFA-
IN-
RINA1+
RINA+
RGA+
RGA+
RINA-
RINA+
RREFA+
RREFA-
RINA-
RREFA+
RREFA+
D
RINA1+
RINA2-
RINA-
CLOSE TO PART
OUT
RREFA-
C
B
IN-
RINA+
RINA1+
OUT
OUT
OUT
IN-
IN1+
RINA2-
RREFA-
IN1+
RREF
RREFA+RINA1+
RGA+
CLOSE TO PART
RINA+
RINA2-
RINA-
IN-
RGA+
IN1+
RINA2-
IN1+
A
OUTB
IN-A
2
R45
4
IN+B
IN-C
2
DNP
R25
OPEN
C10
R18
OPEN
R16
10K
C8
OPEN
R17
10K
DNP
R27
R23
1
0
1
2
1
C25
2
1
C24
2
1
C22
2
1
C23
1
2
D1
1
2
D2
5
4
3
2
1
J12
5
4
3
2
1
J11
R43
2
1
C13
2
1
R35
R34
2
1
R36
R38
R41
2
1
C12
R42
2
1
R46
2
1
R40
R39
2
1
C14
R51
2
1
C15 R55
2
1
R59
R63
2
1
R67
5
4
3
2
1
J13
R50
2
1
C20
R54
2
1
C21
R58
2
1
R62
R66
2
1
R70
5
4
3
2
1
J16
R49
2
1
C18
R53
2
1
C19 R57
2
1
R61
R65
2
1
R69
5
4
3
2
1
J15
R26
5
4
3
2
1
J10
2
1
C11
2
1
R9
5
4
3
2
1
J9
R4
R19
2
1
R10
R13
2
1
R29
1
R31
2
1
5
4
3
2
1
J8
2
1
C9
2
1
R7
5
4
3
2
1
J7
R3
2
1
R8
R12
2
1
R22
2
1
R30
2
1
98
7
6
5
4
3
2
16
15
14
13
12
11
10
1
U1
R47
5
3
2
1
J14
2
1
R68
R64
2
1
R60
R56
R52
2
1
C16
2
1
C17
J4
R32
C5
R33
2
1
R28
R20
2
1
R14
2
1
C6
R11
2
1
R6
R2
5
4
3
2
1
J5
R24
R15
R21
2
1
R5
2
1
C7
5
4
3
2
1
J6
1
J1
R48
2
1
C3
2
1
C1
R1
1
J2
R44
2
1
C2
1
J3
R37
2
1
C4
IN-B
IN-D
IN-C
0
DNP
DNP
DNP
DNP
DNP
100K
DNP
OPEN
DNP
DNP
0
OPEN
VP
OPEN
100K
0.1UF
0
4.7UF
OPEN
DNP
IN+C
DNP
OUTA
IN+D
DNP
0.1UF
0
DNP
0
00
00
DNP
OPEN
OPEN
00
OPEN
OPEN
00
DNP
OPEN
OPEN
0
OPEN
DNP
100K
0
DNP
DNP
4.7UF
100K
QSOP16
VM
IN-A
IN+D
IN-D
OUTD
10K
100K
OPEN
IN+C
DNP
0
OUTC
4.7UF
100K
OPEN
OPEN
VM
VP
OPEN
OPEN
100K
DNP
IN+A
IN-B
IN+B
DNP
OPEN
0
IN+A
100K
0
0
0
DNPDNPDNPDNP
DNP
DNP
10K
10K
10K
10K 10K
10K 10K 10K
10K
10K
Generic
Pack.
1
2
4
5
6
7
8
3
9
10
11
12
13
14
15
16
V-
REF1
V+
http://www.renesas.com
Refer to "http://www.renesas.com/" for the latest and detailed information.
Renesas Electronics America Inc.
1001 Murphy Ranch Road, Milpitas, CA 95035, U.S.A.
Tel: +1-408-432-8888, Fax: +1-408-434-5351
Renesas Electronics Canada Limited
9251 Yonge Street, Suite 8309 Richmond Hill, Ontario Canada L4C 9T3
Tel: +1-905-237-2004
Renesas Electronics Europe Limited
Dukes Meadow, Millboard Road, Bourne End, Buckinghamshire, SL8 5FH, U.K
Tel: +44-1628-651-700, Fax: +44-1628-651-804
Renesas Electronics Europe GmbH
Arcadiastrasse 10, 40472 Düsseldorf, Germany
Tel: +49-211-6503-0, Fax: +49-211-6503-1327
Renesas Electronics (China) Co., Ltd.
Room 1709 Quantum Plaza, No.27 ZhichunLu, Haidian District, Beijing, 100191 P. R. China
Tel: +86-10-8235-1155, Fax: +86-10-8235-7679
Renesas Electronics (Shanghai) Co., Ltd.
Unit 301, Tower A, Central Towers, 555 Langao Road, Putuo District, Shanghai, 200333 P. R. China
Tel: +86-21-2226-0888, Fax: +86-21-2226-0999
Renesas Electronics Hong Kong Limited
Unit 1601-1611, 16/F., Tower 2, Grand Century Place, 193 Prince Edward Road West, Mongkok, Kowloon, Hong Kong
Tel: +852-2265-6688, Fax: +852 2886-9022
Renesas Electronics Taiwan Co., Ltd.
13F, No. 363, Fu Shing North Road, Taipei 10543, Taiwan
Tel: +886-2-8175-9600, Fax: +886 2-8175-9670
Renesas Electronics Singapore Pte. Ltd.
80 Bendemeer Road, Unit #06-02 Hyflux Innovation Centre, Singapore 339949
Tel: +65-6213-0200, Fax: +65-6213-0300
Renesas Electronics Malaysia Sdn.Bhd.
Unit 1207, Block B, Menara Amcorp, Amcorp Trade Centre, No. 18, Jln Persiaran Barat, 46050 Petaling Jaya, Selangor Darul Ehsan, Malaysia
Tel: +60-3-7955-9390, Fax: +60-3-7955-9510
Renesas Electronics India Pvt. Ltd.
No.777C, 100 Feet Road, HAL 2nd Stage, Indiranagar, Bangalore 560 038, India
Tel: +91-80-67208700, Fax: +91-80-67208777
Renesas Electronics Korea Co., Ltd.
17F, KAMCO Yangjae Tower, 262, Gangnam-daero, Gangnam-gu, Seoul, 06265 Korea
Tel: +82-2-558-3737, Fax: +82-2-558-5338
SALES OFFICES
© 2018 Renesas Electronics Corporation. All rights reserved.
Colophon 7.0
(Rev.4.0-1 November 2017)
Notice
1. Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of semiconductor products and application examples. You are fully responsible for
the incorporation or any other use of the circuits, software, and information in the design of your product or system. Renesas Electronics disclaims any and all liability for any losses and damages incurred by
you or third parties arising from the use of these circuits, software, or information.
2. Renesas Electronics hereby expressly disclaims any warranties against and liability for infringement or any other claims involving patents, copyrights, or other intellectual property rights of third parties, by or
arising from the use of Renesas Electronics products or technical information described in this document, including but not limited to, the product data, drawings, charts, programs, algorithms, and application
examples.
3. No license, express, implied or otherwise, is granted hereby under any patents, copyrights or other intellectual property rights of Renesas Electronics or others.
4. You shall not alter, modify, copy, or reverse engineer any Renesas Electronics product, whether in whole or in part. Renesas Electronics disclaims any and all liability for any losses or damages incurred by
you or third parties arising from such alteration, modification, copying or reverse engineering.
5. Renesas Electronics products are classified according to the following two quality grades: “Standard” and “High Quality”. The intended applications for each Renesas Electronics product depends on the
product’s quality grade, as indicated below.
"Standard": Computers; office equipment; communications equipment; test and measurement equipment; audio and visual equipment; home electronic appliances; machine tools; personal electronic
equipment; industrial robots; etc.
"High Quality": Transportation equipment (automobiles, trains, ships, etc.); traffic control (traffic lights); large-scale communication equipment; key financial terminal systems; safety control equipment; etc.
Unless expressly designated as a high reliability product or a product for harsh environments in a Renesas Electronics data sheet or other Renesas Electronics document, Renesas Electronics products are
not intended or authorized for use in products or systems that may pose a direct threat to human life or bodily injury (artificial life support devices or systems; surgical implantations; etc.), or may cause
serious property damage (space system; undersea repeaters; nuclear power control systems; aircraft control systems; key plant systems; military equipment; etc.). Renesas Electronics disclaims any and all
liability for any damages or losses incurred by you or any third parties arising from the use of any Renesas Electronics product that is inconsistent with any Renesas Electronics data sheet, user’s manual or
other Renesas Electronics document.
6. When using Renesas Electronics products, refer to the latest product information (data sheets, user’s manuals, application notes, “General Notes for Handling and Using Semiconductor Devices” in the
reliability handbook, etc.), and ensure that usage conditions are within the ranges specified by Renesas Electronics with respect to maximum ratings, operating power supply voltage range, heat dissipation
characteristics, installation, etc. Renesas Electronics disclaims any and all liability for any malfunctions, failure or accident arising out of the use of Renesas Electronics products outside of such specified
ranges.
7. Although Renesas Electronics endeavors to improve the quality and reliability of Renesas Electronics products, semiconductor products have specific characteristics, such as the occurrence of failure at a
certain rate and malfunctions under certain use conditions. Unless designated as a high reliability product or a product for harsh environments in a Renesas Electronics data sheet or other Renesas
Electronics document, Renesas Electronics products are not subject to radiation resistance design. You are responsible for implementing safety measures to guard against the possibility of bodily injury, injury
or damage caused by fire, and/or danger to the public in the event of a failure or malfunction of Renesas Electronics products, such as safety design for hardware and software, including but not limited to
redundancy, fire control and malfunction prevention, appropriate treatment for aging degradation or any other appropriate measures. Because the evaluation of microcomputer software alone is very difficult
and impractical, you are responsible for evaluating the safety of the final products or systems manufactured by you.
8. Please contact a Renesas Electronics sales office for details as to environmental matters such as the environmental compatibility of each Renesas Electronics product. You are responsible for carefully and
sufficiently investigating applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive, and using Renesas Electronics
products in compliance with all these applicable laws and regulations. Renesas Electronics disclaims any and all liability for damages or losses occurring as a result of your noncompliance with applicable
laws and regulations.
9. Renesas Electronics products and technologies shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws
or regulations. You shall comply with any applicable export control laws and regulations promulgated and administered by the governments of any countries asserting jurisdiction over the parties or
transactions.
10. It is the responsibility of the buyer or distributor of Renesas Electronics products, or any other party who distributes, disposes of, or otherwise sells or transfers the product to a third party, to notify such third
party in advance of the contents and conditions set forth in this document.
11. This document shall not be reprinted, reproduced or duplicated in any form, in whole or in part, without prior written consent of Renesas Electronics.
12. Please contact a Renesas Electronics sales office if you have any questions regarding the information contained in this document or Renesas Electronics products.
(Note 1) “Renesas Electronics” as used in this document means Renesas Electronics Corporation and also includes its directly or indirectly controlled subsidiaries.
(Note 2) “Renesas Electronics product(s)” means any product developed or manufactured by or for Renesas Electronics.