ISL2829xEVAL1Z, ISL5529xEVAL1Z Evaluation Board User's Guide (R) 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, 0 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 4.7F R17 R17 C4 C4 2 1 03 0 0.1F C6 2 1 1000pF 1000PF D1 2 1 Reference Documents * ISL28290 Data Sheet, FN6247 * ISL28291 Data Sheet, FN6156 +5V C7 C7 2 1 + 4.7F 4.7UF R18 C9 2 1 0 0.1F 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 50 back-termination is included for stable operation when driving 50 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- 50 + 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, 4.7F, 50V, 10%, LOW ESR, ROHS Power Supply Decoupling C4, C9 CAP, SMD, 0603, 0.1F, 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, 0, 1/16W, TF, ROHS 0 user selectable resistors R4, R22 RES, SMD, 0603, 49.9, 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, 499, 1/8W, TF, ROHS (ISL2829x) RES, SMD, 0805, 100, 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. 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