ISL5519xEVAL1Z Evaluation Board User’s Guide August 21, 2007 -5V Introduction The ISL5519xEVAL1Z evaluation board is a design platform containing all the circuitry needed to characterize critical performance parameters of the ISL55190 and ISL55191 single op amps, using a variety of user defined test circuits. AN1347.0 +5V Application Note GND ® +5V -5V C4 The ISL5519x amplifiers are single high speed operational amplifiers featuring low noise, low distortion, and rail-to-rail output drive capability. They are designed to operate with single and single supplies from +5VDC (±2.5VDC) down to +3VDC (±1.5VDC). C5 + 4.7µF R17 0 0.1µF C9 R18 0 0.1µF C8 C6 1000pF D1 Reference Documents C7 + 4.7µF 1000pF D2 FIGURE 1. POWER SUPPLY CIRCUIT • ISL55190 Data Sheet, FN6262 . Amplifier Configuration (Figure 2) • ISL55191 Data Sheet, FN6263 The schematic of 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. A series 50Ω back-termination is included for driving 50Ω cables. The circuit can operate from a single 3VDC to +5VDC supply, or from dual supplies from ±1.5VDC to ±2.5VDC. Evaluation Board Key Features The ISL5519xEVAL1Z is designed to enable the IC to operate from a single supply (+3VDC to +5VDC), or from split supplies (±1.5VDC to ±2.5V). The board is configured for differential input with a closed loop gain of 10. 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 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 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. 1k ISL5519x RFA J1 R11 IN- VP IN- - 100 R12 IN+ IN+ 100 R4 V- 50Ω VOUT + VM J2 VCM V+ R14 1k 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 1347 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, outputs and the amplifier feedback loops. The output (Figure 3) has 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. The ISL5519x 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. J1 DNP 100 DNP R9 DNP R2 TO IN DNP R11 RGA R5 IN- J2 R4 OUT DNP R16 0 R6 R12 DNP 100 TO IN + R14 DNP R10 DNP R3 OPEN IN+ C3 OPEN R13 DNP C1 R8 R1 DNP 49.9 1k TO VOUT FIGURE 4. INPUT STAGE FIGURE 3. OUTPUT STAGE ISL5519xEVAL1Z 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, CFA 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 (ISL55190EVAL1Z) ISL55190FUZ, IC-RAIL-TO-RAIL OP AMP, 10P, MSOP, ROHS U1 (ISL55191EVAL1Z) ISL55191FUZ, IC-RAIL-TO-RAIL OP AMP, 10P, MSOP, ROHS R1-R3, R5, R6, R8-R10, R15, R16, RGA 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 RES, SMD, 0603, 49.9Ω, 1/10W, 1%, TF, ROHS Output series resistors R7 RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS Enable pull-up resistors R14, RFA RES, SMD, 0603, 1.00k, 1/10W, 1%, TF, ROHS Gain resistors R11, R12 RES, SMD, 0805, 100Ω, 1/8W, TF, ROHS Gain resistors R13, R17, R18 2 AN1347.0 August 21, 2007 Application Note 1347 ISL5519xEVAL1Z Top View 3 AN1347.0 August 21, 2007 Application Note 1347 +5V -5V GND ISL5519xEVAL1Z Schematic Diagram +5V -5V C5 C7 4.7uF C4 4.7uF R17 R18 0 0 0.1uF C9 0.1uF C8 C6 1000pF 1000pF D2 D1 R4 R16 DNP C3 OPEN 0 OPEN R13 C1 R8 R1 DNP DNP 49.9 3 4 OUT RFA 1 1k 2 RGA DNP 1k DNP 3 R14 R9 100 DNP DNP R2 DNP OPEN R11 R15 R5 IN- CFA J1 4 9 1 2 3 4 U1 DFN08 Generic Pack. 8 7 6 5 8 7 6 5 EP J2 R12 DNP 100 DNP R6 R10 DNP R3 IN+ +5V EN 2 R7 10K C2 1 OPEN 3 -5V 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 4 AN1347.0 August 21, 2007