ISL55001 ® Data Sheet March 9, 2006 High Supply Voltage 220MHz Unity-Gain Stable Operational Amplifier The ISL55001 is high speed, low power, low cost monolithic operational amplifier. The ISL55001 is unity-gain stable and feature a 300V/µs slew rate and 220MHz bandwidth while requiring only 9mA of supply current. The power supply operating range of the ISL55001 is from ±15V down to ±2.5V. For single-supply operation, the ISL55001 operates from 30V down to 5V. The ISL55001 also features an extremely wide output voltage swing of -12.75V/+13.4V with VS = ±15V and RL = 1kΩ. FN6200.1 Features • 220MHz -3dB bandwidth • Unity-gain stable • Low supply current: 9mA @ VS = ±15V • Wide supply range: ±2.5V to ±15V dual-supply and 5V to 30V single-supply • High slew rate: 300V/µs • Fast settling: 75ns to 0.1% for a 10V step • Wide output voltage swing: -12.75V/+13.6V with VS = ±15V, RL = 1kΩ At a gain of +1, the ISL55001 has a -3dB bandwidth of 220MHz with a phase margin of 50°. Because of its conventional voltage-feedback topology, the ISL55001 allows the use of reactive or non-linear elements in its feedback network. This versatility combined with low cost and 140mA of output-current drive makes the ISL55001 an ideal choice for price-sensitive applications requiring low power and high speed. • Low cost, enhanced replacement for the EL2044 • Pb-free plus anneal available (RoHS compliant) Applications • Video amplifiers • Single-supply amplifiers • Active filters/integrators The ISL55001 is available in an 8 Ld SO package and specified for operation over the full -40°C to +85°C temperature range. • High speed sample-and-hold Ordering Information • Pulse/RF amplifiers PART NUMBER ISL55001IBZ (See Note) PART MARKING TAPE & REEL PACKAGE • High speed signal processing • ADC/DAC buffers PKG. DWG. # 55001IBZ - 8 Ld SO (Pb-Free) MDP0027 ISL55001IBZ-T7 55001IBZ (See Note) 7” 8 Ld SO (Pb-Free) MDP0027 NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. • Pin diode receivers • Log amplifiers • Photo multiplier amplifiers • Difference Amplifier Pinout ISL55001 (8 LD SO) TOP VIEW NC 1 IN- 2 IN+ 3 VS- 4 1 8 NC + 7 VS+ 6 OUT 5 NC 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. 2005, 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL55001 Absolute Maximum Ratings (TA = 25°C) Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA Power Dissipation (PD) . . . . . . . . . . . . . . . . . . . . . . . . . See Curves Operating Temperature Range (TA). . . . . . . . . . . . . .-40°C to +85°C Operating Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . +150°C Storage Temperature (TST) . . . . . . . . . . . . . . . . . . .-65°C to +150°C Supply Voltage (VS) . . . . . . . . . . . . . . . . . . . . . . . . . . ±16.5V or 33V Input Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±VS Differential Input Voltage (dVIN). . . . . . . . . . . . . . . . . . . . . . . . .±10V ESD Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3KV ESD Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250V CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA DC Electrical Specifications PARAMETER VS = ±15V, RL = 1kΩ, TA = 25°C, unless otherwise specified. DESCRIPTION CONDITION MIN TYP MAX UNIT 0.06 3 mV VOS Input Offset Voltage TCVOS Average Offset Voltage Drift IB Input Bias Current 1.72 3.5 µA IOS Input Offset Current 0.27 1.5 µA TC-IOS Average Offset Current Drift (Note 1) 0.8 nA/°C AVOL Open-loop Gain VOUT = ±10V, RL = 1kΩ 10 17 KV/V PSRR Power Supply Rejection Ratio VS = ±5V to ±15V 75 90 dB CMRR Common-mode Rejection Ratio VCM = ±10V, VOUT = 0V 70 90 dB CMIR Common-mode Input Range VS = ±15V +/-14 V VOUT Output Voltage Swing VO+, RL = 1kΩ 13.25 13.5 V VO-, RL = 1kΩ -12.6 -12.8 V VO+, RL = 150Ω 10.7 11.5 V VO-, RL = 150Ω -8.8 -9.9 V 120 145 mA ISC Output Short Circuit Current IS Supply Current RIN Input Resistance CIN Input Capacitance ROUT PSOR 18 no load 8.3 2.0 µV/°C 9.0 mA 2.75 MΩ AV = +1 1 pF Output Resistance AV = +1 50 mΩ Power Supply Operating Range Dual supply Single supply ±2.25 ±15 V 4.5 30 V MAX UNIT NOTE: 1. Measured from TMIN to TMAX. AC Electrical Specifications PARAMETER BW VS = ±15V, AV = +1, RL = 1kΩ unless otherwise specified. DESCRIPTION -3dB Bandwidth (VOUT = 0.4VPP) GBWP Gain Bandwidth Product PM Phase Margin CONDITION TYP AV = +1 220 MHz AV = -1 55 MHz AV = +2 53 MHz AV = +5 17 MHz 70 MHz 55 ° RL = 1kΩ, CL = 5pF 2 MIN FN6200.1 March 9, 2006 ISL55001 AC Electrical Specifications PARAMETER VS = ±15V, AV = +1, RL = 1kΩ unless otherwise specified. (Continued) DESCRIPTION CONDITION MIN TYP MAX UNIT 250 280 V/µs SR Slew Rate (Note 1) RL = 100Ω FPBW Full-power Bandwidth (Note 2) VS = ±15V 9.5 MHz tS Settling to +0.1% (AV = +1) VS = ±15V, 10V step 75 ns dG Differential Gain (Note 3) NTSC/PAL 0.01 % dP Differential Phase NTSC/PAL 0.05 ° eN Input Noise Voltage 10kHz 12 nV/√Hz iN Input Noise Current 10kHz 1.5 pA/√Hz NOTES: 1. Slew rate is measured on rising edge. 2. For VS = ±15V, VOUT = 10VPP, for VS = ±5V, VOUT = 5VPP. Full-power bandwidth is based on slew rate measurement using FPBW = SR/(2π * VPEAK). 3. Video performance measured at VS = ±15V, AV = +2 with two times normal video level across RL = 150Ω. This corresponds to standard video levels across a back-terminated 75Ω load. For other values or RL, see curves. Typical Performance Curves Vs=+/-15V =±15V RVLS=1KΩ RL=1kΩPower=Source Source Power=-20dBm VS=±15V RL=1kΩ Source Power=-20dBm FIGURE 1. OPEN-LOOP GAIN vs FREQUENCY VS=±15V CL=5pF Source Power=-20dBm FIGURE 2. OPEN-LOOP PHASE vs FREQUENCY VS=±15V CL=5pF Source Power=-20dBm RL=1kΩ RL=150Ω RL=1kΩ RL=500Ω RL=500Ω RL=150Ω RL=75Ω RL=75Ω RL=-50Ω FIGURE 3. FREQUENCY RESPONSE FOR VARIOUS RLOAD (AV = +1) 3 RL=50Ω FIGURE 4. FREQUENCY RESPONSE FOR VARIOUS RLOAD (AV = +2) FN6200.1 March 9, 2006 ISL55001 Typical Performance Curves (Continued) VS=±15V RL=1kΩ Source Power=-20dBm CL=82pF CL=39pF CL=82pF CL=39pF CL=10pF CL=5pF CL=10pF VS=±15V RL=1kΩ Source Power=-20dBm CL=5pF FIGURE 6. FREQUENCYRESPONSE FOR VARIOUS CLOAD (AV = +2) FIGURE 7. PHASE vs FREQUENCY FOR VARIOUS NONINVERTING GAIN SETTINGS FIGURE 8. PHASE vs FREQUENCY FOR VARIOUS INVERTING GAIN SETTINGS 100 350 RL=500Ω 80 SLEW RATE (V/µs) GAIN BANDWIDTH PRODUCT (MHz) FIGURE 5. FREQUENCY RESPONSE FOR VARIOUS CLOAD (AV = +1) 60 40 20 0 AV=+2 RF=500Ω 300 RL=500Ω CL=5pF 250 POSITIVE SLEW RATE NEGATIVE SLEW RATE 200 150 0 3 6 9 12 15 SUPPLY VOLTAGES (±V) FIGURE 9. GAIN BANDWIDTH PRODUCT vs SUPPLY 4 100 0 3 6 9 12 15 SUPPLY VOLTAGES (±V) FIGURE 10. SLEW RATE vs SUPPLY FN6200.1 March 9, 2006 ISL55001 Typical Performance Curves (Continued) FIGURE 11. GAIN vs FREQUENCY FOR VARIOUS RFEEDBACK (AV = +1) FIGURE 12. GAIN vs FREQUENCY FOR VARIOUS RFEEDBACK (AV = +2) NORMALIZED GAIN (dB) 5 AV=+1 RF=0Ω 3 RL=500Ω CL=5pF VS=±5V VS=±2.5V 1 VS=±15V -1 VS=±10V -3 -5 100K 1M 10M 100M 1G FREQUENCY (Hz) FIGURE 13. GAIN vs FREQUENCY FOR VARIOUS INVERTING INPUT CAPACITANCE (CIN) FIGURE 15. COMMON-MODE REJECTION RATIO (CMRR) 5 FIGURE 14. GAIN vs FREQUENCY FOR VARIOUS SUPPLY SETTINGS FIGURE 16. POWER SUPPLY REJECTION RATIO (PSRR) FN6200.1 March 9, 2006 ISL55001 Typical Performance Curves VS=±15V RL=500Ω VOUT=2V P-P (Continued) THD 3rd HD 2nd HD FIGURE 17. HARMONIC DISTORTION vs FREQUENCY (AV = +1) FIGURE 18. HARMONIC DISTORTION vs OUTPUT VOLTAGE (AV = +2) OUTPUT VOLTAGE SWING (Vp-p) 25 RL=500Ω CL=5pF AV=+1 20 AV=+2 RF=500Ω 15 10 5 0 0 3 6 9 12 15 SUPPLY VOLTAGES (±V) FIGURE 19. OUTPUT SWING vs FREQUENCY FOR VARIOUS GAIN SETTINGS FIGURE 20. OUTPUT SWING vs SUPPLY VOLTAGE FOR VARIOUS GAIN SETTINGS 20% to 80% 80% to 20% 20% to 80% 80% to 20% FIGURE 21. LARGE SIGNAL RISE AND FALL TIMES 6 FIGURE 22. SMALL SIGNAL RISE AND FALL TIMES FN6200.1 March 9, 2006 ISL55001 (Continued) 25 1.2 20 1 POWER DISSIPATION (W) TOTAL SUPPLY CURRENT (mA) Typical Performance Curves 15 10 AV=+1 RF=0Ω RL=500Ω CL=5pF 5 0 0 3 6 9 12 781mW 0.6 SO8 θJA=160°C/W 0.4 0.2 0 25 50 75 85 100 125 150 AMBIENT TEMPERATURE (°C) SUPPLY VOLTAGES (±V) FIGURE 23. SUPPLY CURRENT vs SUPPLY VOLTAGE 1.8 0.8 0 15 JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD FIGURE 24. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD POWER DISSIPATION (W) 1.6 1.4 1.2 1 1.136W 0.8 SO8 θJA=110°C/W 0.6 0.4 0.2 0 0 25 50 75 85 100 125 150 AMBIENT TEMPERATURE (°C) FIGURE 25. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE 7 FN6200.1 March 9, 2006 ISL55001 Product Description The ISL55001 is a wide bandwidth, low power, and low offset voltage feedback operational amplifier. This device is internally compensated for closed loop gain of +1 or greater. Connected in voltage follower mode and driving a 500Ω load, the -3dB bandwidth is around a 220MHz. Driving a 150Ω load and a gain of 2, the bandwidth is about 90MHz while maintaining a 300V/µs slew rate. The ISL55001 is designed to operate with supply voltage from +15V to -15V. That means for single supply application, the supply voltage is from 0V to 30V. For split supplies application, the supply voltage is from ±15V. The amplifier has an input common-mode voltage range from 1.5V above the negative supply (VS- pin) to 1.5V below the positive supply (VS+ pin). If the input signal is outside the above specified range, it will cause the output signal to be distorted. The outputs of the ISL55001 can swing from -12.75V to +13.4V for VS = ±15V. As the load resistance becomes lower, the output swing is lower. Choice of Feedback Resistor and Gain Bandwidth Product For applications that require a gain of +1, no feedback resistor is required. Just short the output pin to the inverting input pin. For gains greater than +1, the feedback resistor forms a pole with the parasitic capacitance at the inverting input. As this pole becomes smaller, the amplifier's phase margin is reduced. This causes ringing in the time domain and peaking in the frequency domain. Therefore, RF can't be very big for optimum performance. If a large value of RF must be used, a small capacitor in the few Pico Farad range in parallel with RF can help to reduce the ringing and peaking at the expense of reducing the bandwidth. For gain of +1, RF = 0 is optimum. For the gains other than +1, optimum response is obtained with RF with proper selection of RF and RG (see Figures15 and 16 for selection). Video Performance For good video performance, an amplifier is required to maintain the same output impedance and the same frequency response as DC levels are changed at the output. This is especially difficult when driving a standard video load of 150Ω, because of the change in output current with DC level. The dG and dP of this device is about 0.01% and 0.05°, while driving 150Ω at a gain of 2. Driving high impedance loads would give a similar or better dG and dP performance. Driving Capacitive Loads and Cables The ISL55001 can drive 47pF loads in parallel with 500Ω with less than 3dB of peaking at gain of +1 and as much as 100pF at a gain of +2 with under 3db of peaking. If less peaking is desired in applications, a small series resistor (usually between 5Ω to 50Ω) can be placed in series with the output to eliminate most peaking. However, this will reduce 8 the gain slightly. If the gain setting is greater than 1, the gain resistor RG can then be chosen to make up for any gain loss which may be created by the additional series resistor at the output. When used as a cable driver, double termination is always recommended for reflection-free performance. For those applications, a back-termination series resistor at the amplifier's output will isolate the amplifier from the cable and allow extensive capacitive drive. However, other applications may have high capacitive loads without a back-termination resistor. Again, a small series resistor at the output can help to reduce peaking. Output Drive Capability The ISL55001 does not have internal short circuit protection circuitry. It has a typical short circuit current of 140mA. If the output is shorted indefinitely, the power dissipation could easily overheat the die or the current could eventually compromise metal integrity. Maximum reliability is maintained if the output current never exceeds ±60mA. This limit is set by the design of the internal metal interconnect. Note that in transient applications, the part is robust. Short circuit protection can be provided externally with a back match resistor in series with the output placed close as possible to the output pin. In video applications this would be a 75Ω resistor and will provide adequate short circuit protection to the device. Care should still be taken not to stress the device with a short at the output. Power Dissipation With the high output drive capability of the ISL55001, it is possible to exceed the 150°C absolute maximum junction temperature under certain load current conditions. Therefore, it is important to calculate the maximum junction temperature for an application to determine if load conditions or package types need to be modified to assure operation of the amplifier in a safe operating area. The maximum power dissipation allowed in a package is determined according to: T JMAX – T AMAX PD MAX = -------------------------------------------Θ JA Where: • TJMAX = Maximum junction temperature • TAMAX = Maximum ambient temperature • θJA = Thermal resistance of the package The maximum power dissipation actually produced by an IC is the total quiescent supply current times the total power supply voltage, plus the power in the IC due to the load, or: FN6200.1 March 9, 2006 ISL55001 For sourcing: ∑ ( VS – VOUTi ) × ---------------R Li capacitor in parallel with a 0.1µF ceramic capacitor from VS+ to GND will suffice. This same capacitor combination should be placed at each supply pin to ground if split supplies are to be used. In this case, the VS- pin becomes the negative supply rail. n Printed Circuit Board Layout n PD MAX = V S × I SMAX + V OUTi i=1 For sinking: ∑ ( VOUTi – VS ) × ILOADi PD MAX = V S × I SMAX + For good AC performance, parasitic capacitance should be kept to minimum. Use of wire wound resistors should be avoided because of their additional series inductance. Use of sockets should also be avoided if possible. Sockets add parasitic inductance and capacitance that can result in compromised performance. Minimizing parasitic capacitance at the amplifier's inverting input pin is very important. The feedback resistor should be placed very close to the inverting input pin. Strip line design techniques are recommended for the signal traces. i=1 Where: • VS = Supply voltage • ISMAX = Maximum quiescent supply current • VOUT = Maximum output voltage of the application • RLOAD = Load resistance tied to ground • ILOAD = Load current • N = 1 number of amplifiers Application Circuits By setting the two PDMAX equations equal to each other, we can solve the output current and RLOAD to avoid the device overheat. Sallen-Key Low Pass Filter Power Supply Bypassing Printed Circuit Board Layout As with any high frequency device, a good printed circuit board layout is necessary for optimum performance. Lead lengths should be as short as possible. The power supply pin must be well bypassed to reduce the risk of oscillation. For normal single supply operation, where the VS- pin is connected to the ground plane, a single 4.7µF tantalum A common and easy to implement filter taking advantage of the wide bandwidth, low offset and low power demands of the ISL55001. A derivation of the transfer function is provided for convenience (See Figure 26). Sallen-Key High Pass Filter Again this useful filter benefits from the characteristics of the ISL55001. The transfer function is very similar to the low pass so only the results are presented (See Figure 27). K = 1+ V2 5V 1nF 1nF R1 V1 1kΩ R2 1kΩ C2 1nF + V+ - V- RA 1kΩ VOUT R7 1kΩ RB 1kΩ C5 1nF 1 V1 R 2C 2 s + 1 Vo V 1 − Vi Vo − Vi K =0 1 + − V1 + 1 R1 R2 C1s K H( s ) = R1C1R 2C 2 s 2 + ((1 − K )R1C1 + R1C 2 + R 21C 2 )s + 1 1 H( jw ) = 1 − w 2 R1C1R 2C 2 + jw ((1 − K )R1C1 + R1C 2 + R 2C 2 ) Holp = K 1 wo = R1C1R 2C 2 1 Q= R1C1 R1C 2 R 2C 2 (1 − K ) + + R 2C 2 R 2C1 R1C1 Vo = K C5 C1 RB RA V3 5V Holp = K 1 wo = RC 1 Q= 3 −K Equations simplify if we let all components be equal R=C FIGURE 26. SALLEN-KEY LOW PASS FILTER 9 FN6200.1 March 9, 2006 ISL55001 V2 5V Holp = K C5 wo = 1nF C1 V1 (1 − K ) R2 1kΩ 1kΩ C2 1nF + V+ - V- R 1C 1 + R 2C 2 R 1C 2 + R 2C1 R 2C 2 R 1C 1 VOUT R7 1kΩ RB RA 1kΩ 1 Q = 1nF R1 1 R 1C 1R 2 C 2 K 4 −K Equations simplify if we let 2 all components be equal R=C wo = RC Holp = 1kΩ C5 1nF V3 5V Q = 2 4 −K FIGURE 27. SALLEN-KEY HGH PASS FILTER Differential Output Instrumentation Amplifier The addition of a third amplifier to the conventional three amplifier instrumentation amplifier introduces the benefits of differential signal realization, specifically the advantage of using common-mode rejection to remove coupled noise and e1 A1 + - R3 R3 A3 R2 + R3 RG R3 e2 + R3 + R3 eo3 + e o3 = – ( 1 + 2R 2 ⁄ R G ) ( e 1 – e 2 ) e o4 = ( 1 + 2R 2 ⁄ R G ) ( e 1 – e 2 ) e o = – 2 ( 1 + 2R 2 ⁄ R G ) ( e 1 – e 2 ) R3 A4 R2 A2 ground potential errors inherent in remote transmission. This configuration also provides enhanced bandwidth, wider output swing and faster slew rate than conventional three amplifier solutions with only the cost of an additional amplifier and few resistors. REF eo 2f C1, 2 BW = ----------------A Di A Di = – 2 ( 1 + 2R 2 ⁄ R G ) eo4 R3 FIGURE 28. DIFFERENTIAL OUTPUT INSTRUMENTATION AMPLIFIER 10 FN6200.1 March 9, 2006 ISL55001 Strain Gauge resulting in an imbalance in the bridge. A voltage variation from the referenced high accuracy source is generated and translated to the difference amplifier through the buffer stage. This voltage difference as a function of the strain is converted into an output voltage. The strain gauge is an ideal application to take advantage of the moderate bandwidth and high accuracy of the ISL55001. The operation of the circuit is very straightforward. As the strain variable component resistor in the balanced bridge is subjected to increasing strain, its resistance changes, +V 2 5V C6 VARIABLE SUBJECT TO STRAIN V5 + 0V - R15 1kΩ 1kΩ R16 1kΩ 1nF R17 1kΩ R18 1kΩ 1kΩ + V+ - V- VOUT RL (V1+V2+V3+V4) 1kΩ RF 1kΩ C12 1nF + V4 - 5V FIGURE 29. STRAIN GAUGE AMPLIFIER 11 FN6200.1 March 9, 2006 ISL55001 Small Outline Plastic Packages (SOIC) NOTE: The package drawing shown here may not be the latest version. To check the latest revision, please refer to the Intersil website at <http://www.intersil.com/design/packages/index.asp> All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. 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 data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 12 FN6200.1 March 9, 2006