an1343

ISL2829xEVAL1Z, ISL5529xEVAL1Z
Evaluation Board User’s Guide
®
Application Note
August 9, 2007
Introduction
AN1343.1
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).
+5V
--5V
1
GND
1
-5V
+5V
-5V
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.
GND
V- terminals connect to their respective power supply
terminals. De-coupling capacitors C4, C9, connect to ground
through R17, R18, 0Ω resistors. Two additional capacitors,
C6 and C8 are placed close to the IC and provide additional
high frequency filtering. Anti-reverse diodes D1 and D2
protect the circuit in the case of accidental polarity reversal.
C5
C5
2
+
4.7UF
4.7µF
R17
R17
C4
C4
2
1
03
0
0.1µF
C6
2
1
1000pF
1000PF
D1
2
1
Reference Documents
• ISL28290 Data Sheet, FN6247
• ISL28291 Data Sheet, FN6156
+5V
C7
C7
2
1
+
4.7µF
4.7UF
R18
C9
2
1
0
0.1µF
C8
C8
2
1
1000pF
1000PF
D2
D2
2
1
• ISL55290 Data Sheet, FN6262
FIGURE 1. POWER SUPPLY CIRCUIT
• ISL55291 Data Sheet, FN6263
Evaluation Board Key Features
Amplifier Configuration (Figure 2)
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.
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.
Power Supplies (Figure 1)
External power connections are made through the V+, Vand 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
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,
4.99k (ISL2829x)
1.00k (ISL5529x)
1/2 ISL2829x, ISL5529x
RFA, RFB
J1, J3
R11, R29
IN-
VP
IN-
499 (ISL2829x)
100 (ISL5529x)
R12, R20
IN+
IN+
J2, J4
VCM
V+
R4, R22
V-
50Ω
+
499 (ISL2829x)
100 (ISL5529x)
VOUT(x)
VM
R14, R32
4.99k (ISL2829x)
1.00k (ISL5529x)
GND
FIGURE 2. BASIC AMPLIFIER CONFIGURATION
1
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.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Application Note 1343
4
3
0
499 (ISL2829x)
100 (ISL5529x)
RGA
TO IN-
R3
DNP
RGA
DNP
R9
DNP
R2
3
DNP
DNP
DNP
1
4
3
J2
J2
OPEN
TO IN+
R6
R6
R12
R12
DNP
499 (ISL2829x)
100 (ISL5529x)
R14
1
R3
DNP
R10
R3
FIGURE 3. 1/2 OUTPUT STAGE
R10
R14
4
IN+
IN+A
5
DNP
TO VOUT
3
R16
C3
C3
R11
R11
DNP
1
0
R13 0 R16
OPEN
R13
1
DNP
DNP
C1
C1
R8
2
DNP
R8
R1
R1
OPEN
OPEN
3
4
R2
49.9
9.9
R5
R5
1
ININ-A
5
R4
1
OUT
5
1
J1
J1
4
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.
4.99k (ISL2829x)
1.00k (ISL5529x)
DNP
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
DIODE-RECTIFIER, SMD, SOD-123, 2P, 40V, 0.5A, ROHS
Reverse Power Protection
D1, D2
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
RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER
User selectable resistors - not populated
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
R1-R3, R6, R8-R10, R15, R16,
R19-R21, R24, R26-R28, R33,
R34, RGA, RGB
R13, R17, R18, R31
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)
2
AN1343.1
August 9, 2007
ISL2829xEVAL1Z, ISL5529xEVAL1Z Top View
3
AN1343.1
August 9, 2007
IN+A
5
J2
25
IN-A
3
4
+5V
1
3EN_A
1
2
49.9
R7
10K
DNP
R6
0
R5
R8
4
J1
3
3
4
4
3
3
4
R1
R2
R3
DNP
DNP
DNP
1
R9
OUTA
1
0
R11=499 (ISL2829X)
R11 =100 (ISL5529X)
-5V
R14=4.99k (ISL2829X)
=1k (ISL5529X)
R12=499 (ISL2829X)
=100 (ISL5529X)
R12
OPEN
DNP
DNP
C1
R10
R16
RGA
R14
R15
2
DNP
DNP
DNP
OPEN
R4
1
C2
OPEN
C4
2
C5
1
2
C7
1
D1
1000PF
C6
1
1
3.3
R17
2
2
C8
2
1
5
4
3
2
1
5
4
3
2
Pack.
U1
10
6
7
MSOP10 9
Generic 8
10
6
7
8
9
C9
1
1
0.1UF
1000PF
D2
3.3
RFA=RFB=4.99k (ISL2829X)
=1k (ISL5529X)
2
2
0.1UF
1
4.7UF
-5V
1
RFA
R18
GND
1
4.7UF
+5V
1
4.99K
+5V
OPEN
CFB
RFB
4
IN+B
5
J4
5
IN-B
5
J3
5
3
3
3
4
4
4
3
3
4
1
4.99K
DNP
+5V
1
1
1
1
3EN_B
R20
R19
DNP
DNP
R21
R22
2
49.9
R26
10K
R25
DNP
R24
0
R23
DNP
1
0
R30
R29=499 (ISL2829X)
=100 (ISL5529X)
R29
OPEN
1
DNP
C10
0
R27
2
DNP
R28
C3
2
DNP
1
CFA
2
OPEN
R13
2
1
2
-5V
1
OPEN
-5V
R32=4.99k (ISL2829X)
=1k (ISL5529X)
R30=499 (ISL2829X)
=100 (ISL5529X)
RGB
R32
R33
DNP
OPEN
R31
C11
R34
C12
2
DNP
4
DNP
OUTB5
ISL2829xEVAL1Z, ISL5529xEVAL1Z Schematic Diagram
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
AN1343.1
August 9, 2007
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