HFA1100 ® Data Sheet October 26, 2004 850MHz, Low Distortion Current Feedback Operational Amplifiers Features • Low Distortion (30MHz, HD2) . . . . . . . . . . . . . . . . -56dBc The HFA1100 is a high-speed, wideband, fast settling current feedback amplifier built with Intersil's proprietary complementary bipolar UHF-1 process. It operates with single supply voltages as low as 4.5V (see Application Information section). • -3dB Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . 850MHz • Very Fast Slew Rate . . . . . . . . . . . . . . . . . . . . . 2300V/µs • Fast Settling Time (0.1%). . . . . . . . . . . . . . . . . . . . . 11ns • Excellent Gain Flatness - (100MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.14dB - (50MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.04dB The HFA1100 is a basic op amp with uncommitted pins 1, 5, and 8. This device offers a significant performance improvement over the AD811, AD9617/18, the CLC400-409, and the EL2070, EL2073, EL2030. • High Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 60mA • Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . . . . <10ns • Operates with 5V Single Supply (See AN9745) Ordering Information PART NUMBER (BRAND) TEMP. RANGE (°C) • Pb-Free Available (RoHS Compliant) PACKAGE PKG. DWG. # HFA1100IP -40 to 85 8 Ld PDIP E8.3 HFA1100IB (H1100I) -40 to 85 8 Ld SOIC M8.15 HFA1100IB96 (H1100I) -40 to 85 8 Ld SOIC Tape and Reel M8.15 HFA1100IBZ (Note) (H1100I) -40 to 85 8 Ld SOIC (Pb-free) M8.15 HFA1100IBZ96 (Note) (H1100I) -40 to 85 8 Ld SOIC Tape and Reel (Pb-free) HFA11XXEVAL FN2945.9 Applications • Video Switching and Routing • Pulse and Video Amplifiers • RF/IF Signal Processing • Flash A/D Driver • Medical Imaging Systems • Related Literature - AN9420, Current Feedback Theory - AN9202, HFA11XX Evaluation Fixture - AN9745, Single 5V Supply Operation M8.15 DIP Evaluation Board for High-Speed Op Amps Pinout NOTE: Intersil Pb-free 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-020C. HFA1100 (PDIP, SOIC) TOP VIEW The Op Amps with Fastest Edges NC 1 -IN 2 +IN 3 V- 4 8 NC - 7 V+ + 6 OUT 5 NC INPUT 220MHz SIGNAL OUTPUT (AV = 2) HFA1100 OP AMP 0ns 25ns 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2000, 2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners. HFA1100 Absolute Maximum Ratings TA = 25°C Thermal Information Voltage Between V+ and V-. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSUPPLY Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V Output Current (50% Duty Cycle) . . . . . . . . . . . . . . . . . . . . . . 60mA Thermal Resistance (Typical, Note 1) θJA (°C/W) θJC (°C/W) PDIP Package . . . . . . . . . . . . . . . . . . . 130 N/A SOIC Package . . . . . . . . . . . . . . . . . . . 170 N/A Maximum Junction Temperature (Plastic Package) . . . . . . . . 150°C Maximum Storage Temperature Range . . . . . . . . . -65°C to 150°C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C (SOIC - Lead Tips Only) Operating Conditions Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C 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. NOTE: 1. θJA is measured with the component mounted on an evaluation PC board in free air. VSUPPLY = ±5V, AV = +1, RF = 510Ω , RL = 100Ω , Unless Otherwise Specified Electrical Specifications (NOTE 2) TEST LEVEL TEMP. (°C) MIN TYP MAX UNITS A 25 - 2 6 mV A Full - - 10 mV C Full - 10 - µV/°C A 25 40 46 - dB A Full 38 - - dB A 25 45 50 - dB A Full 42 - - dB A 25 - 25 40 µA A Full - - 65 µA C Full - 40 - nA/°C A 25 - 20 40 µA/V A Full - - 50 µA/V A 25 - 12 50 µA A Full - - 60 µA C Full - 40 - nA/°C A 25 - 1 7 µA/V A Full - - 10 µA/V A 25 - 6 15 µA/V A Full - - 27 µA/V Non-Inverting Input Resistance A 25 25 50 - kΩ Inverting Input Resistance C 25 - 20 30 Ω Input Capacitance (Either Input) B 25 - 2 - pF Input Common Mode Range C Full ±2.5 ±3.0 - V TEST CONDITIONS PARAMETER INPUT CHARACTERISTICS Input Offset Voltage (Note 3) Input Offset Voltage Drift ∆VCM = ±2V VIO CMRR ∆VS = ±1.25V VIO PSRR Non-Inverting Input Bias Current (Note 3) +IN = 0V +IBIAS Drift ∆VCM = ±2V +IBIAS CMS Inverting Input Bias Current (Note 3) -IN = 0V -IBIAS Drift ∆VCM = ±2V -IBIAS CMS ∆VS = ±1.25V -IBIAS PSS Input Noise Voltage (Note 3) 100kHz B 25 - 4 - nV/√Hz +Input Noise Current (Note 3) 100kHz B 25 - 18 - pA/√Hz -Input Noise Current (Note 3) 100kHz B 25 - 21 - pA/√Hz 25 - 300 - kΩ TRANSFER CHARACTERISTICS AV = +2, Unless Otherwise Specified Open Loop Transimpedance (Note 3) 2 B FN2945.9 HFA1100 VSUPPLY = ±5V, AV = +1, RF = 510Ω , RL = 100Ω , Unless Otherwise Specified (Continued) Electrical Specifications TEST CONDITIONS PARAMETER (NOTE 2) TEST LEVEL TEMP. (°C) MIN TYP MAX UNITS -3dB Bandwidth (Note 3) VOUT = 0.2VP-P, AV = +1 B 25 530 850 - MHz -3dB Bandwidth VOUT = 0.2VP-P, AV = +2, RF = 360Ω B 25 - 670 - MHz Full Power Bandwidth VOUT = 4VP-P, AV = -1 B 25 - 300 - MHz Gain Flatness (Note 3) To 100MHz B 25 - ±0.14 - dB Gain Flatness To 50MHz B 25 - ±0.04 - dB Gain Flatness To 30MHz B 25 - ±0.01 - dB Linear Phase Deviation (Note 3) DC to 100MHz B 25 - 0.6 - Degrees Differential Gain NTSC, RL = 75Ω B 25 - 0.03 - % Differential Phase NTSC, RL = 75Ω B 25 - 0.05 - Degrees A Full 1 - - V/V A 25 ±3.0 ±3.3 - V A Full ±2.5 ±3.0 - V A 25, 85 50 60 - mA A -40 35 50 - mA B 25 - 0.07 - Ω Minimum Stable Gain OUTPUT CHARACTERISTICS AV = +2, Unless Otherwise Specified Output Voltage (Note 3) AV = -1 Output Current RL = 50Ω, AV = -1 DC Closed Loop Output Impedance (Note 3) 2nd Harmonic Distortion (Note 3) 30MHz, VOUT = 2VP-P B 25 - -56 - dBc 3rd Harmonic Distortion (Note 3) 30MHz, VOUT = 2VP-P B 25 - -80 - dBc 3rd Order Intercept (Note 3) 100MHz B 25 20 30 - dBm 1dB Compression 100MHz B 25 15 20 - dBm TRANSIENT RESPONSE AV = +2, Unless Otherwise Specified Rise Time VOUT = 2.0V Step B 25 - 900 - ps Overshoot (Note 3) VOUT = 2.0V Step B 25 - 10 - % Slew Rate AV = +1, VOUT = 5VP-P B 25 - 1400 - V/µs Slew Rate AV = +2, VOUT = 5VP-P B 25 1850 2300 - V/µs 0.1% Settling (Note 3) VOUT = 2V to 0V B 25 - 11 - ns 0.2% Settling (Note 3) VOUT = 2V to 0V B 25 - 7 - ns Overdrive Recovery Time 2X Overdrive B 25 - 7.5 10 ns Supply Voltage Range B Full ±4.5 - ±5.5 V Supply Current (Note 3) A 25 - 21 26 mA A Full - - 33 mA POWER SUPPLY CHARACTERISTICS NOTES: 2. Test Level: A. Production Tested; B. Typical or Guaranteed Limit Based on Characterization; C. Design Typical for Information Only. 3. See Typical Performance Curves for more information. 3 FN2945.9 HFA1100 Application Information Use of Die in Hybrid Applications Optimum Feedback Resistor (RF) The enclosed plots of inverting and non-inverting frequency response detail the performance of the HFA1100 in various gains. Although the bandwidth dependency on ACL isn’t as severe as that of a voltage feedback amplifier, there is an appreciable decrease in bandwidth at higher gains. This decrease can be minimized by taking advantage of the current feedback amplifier’s unique relationship between bandwidth and RF . All current feedback amplifiers require a feedback resistor, even for unity gain applications, and the RF , in conjunction with the internal compensation capacitor, sets the dominant pole of the frequency response. Thus, the amplifier’s bandwidth is inversely proportional to RF . The HFA1100 design is optimized for a 510Ω RF , at a gain of +1. Decreasing RF in a unity gain application decreases stability, resulting in excessive peaking and overshoot (Note: Capacitive feedback causes the same problems due to the feedback impedance decrease at higher frequencies). At higher gains the amplifier is more stable, so RF can be decreased in a trade-off of stability for bandwidth. The table below lists recommended RF values for various gains, and the expected bandwidth. ACL RF (Ω) BW (MHz) +1 510 850 -1 430 580 +2 360 670 +5 150 520 +10 180 240 +19 270 125 5V Single Supply Operation This amplifier operates at single supply voltages down to 4.5V. The table below details the amplifier’s performance with a single 5V supply. The dramatic supply current reduction at this operating condition (refer also to Figure 23) makes these op amps even better choices for low power 5V systems. Refer to Application Note AN9745 for further information. PARAMETER This amplifier is designed with compensation to negate the package parasitics that typically lead to instabilities. As a result, the use of die in hybrid applications results in overcompensated performance due to lower parasitic capacitances. Reducing RF below the recommended values for packaged units will solve the problem. For AV = +2 the recommended starting point is 300Ω, while unity gain applications should try 400Ω. PC Board Layout The frequency performance of this amplifier depends a great deal on the amount of care taken in designing the PC board. The use of low inductance components such as chip resistors and chip capacitors is strongly recommended, while a solid ground plane is a must! Attention should be given to decoupling the power supplies. A large value (10µF) tantalum in parallel with a small value chip (0.1µF) capacitor works well in most cases. Terminated microstrip signal lines are recommended at the input and output of the device. Output capacitance, such as that resulting from an improperly terminated transmission line will degrade the frequency response of the amplifier and may cause oscillations. In most cases, the oscillation can be avoided by placing a resistor in series with the output. Care must also be taken to minimize the capacitance to ground seen by the amplifier’s inverting input. The larger this capacitance, the worse the gain peaking, resulting in pulse overshoot and possible instability. To this end, it is recommended that the ground plane be removed under traces connected to pin 2, and connections to pin 2 should be kept as short as possible. An example of a good high frequency layout is the Evaluation Board shown below. Evaluation Board An evaluation board is available for the HFA1100 (Part Number HFA11XXEVAL). Please contact your local sales office for information. TYP Input Common Mode Range 1V to 4V -3dB BW (AV = +2) 267MHz Gain Flatness (to 50MHz, AV = +2) 0.05dB Output Voltage (AV = -1) 1.3V to 3.8V Slew Rate (AV = +2) 475V/µs 0.1% Settling Time 17ns Supply Current 5.5mA 4 FN2945.9 HFA1100 The layout and schematic of the board are shown below: 500Ω 500Ω 50Ω VH 1 8 2 7 0.1µF 10µF +5V 50Ω IN 10µF 3 6 4 5 OUT VL 0.1µF GND GND -5V TOP LAYOUT BOTTOM LAYOUT VH 1 +IN VL OUT V+ VGND Typical Performance Curves AV = +2 1.2 90 AV = +2 0.9 OUTPUT VOLTAGE (V) 60 30 0 -30 -60 0.6 0.3 0 -0.3 -0.6 -90 -0.9 -120 -1.2 TIME (5ns/DIV.) TIME (5ns/DIV.) NORMALIZED GAIN (dB) FIGURE 2. LARGE SIGNAL PULSE VOUT = 200mVP-P 0 GAIN -3 AV = +1 -6 AV = +2 -9 AV = +6 AV = +11 -12 PHASE 0 AV = +1 AV = +2 -180 AV = +6 -270 AV = +11 0.3 1 -90 10 100 FREQUENCY (MHz) -360 1K FIGURE 3. NON-INVERTING FREQUENCY RESPONSE 5 VOUT = 200mVP-P 0 GAIN -3 AV = -1 -6 AV = -5 AV = -10 -9 AV = -20 -12 PHASE (DEGREES) NORMALIZED GAIN (dB) FIGURE 1. SMALL SIGNAL PULSE PHASE 180 AV = -1 90 AV = -5 0 AV = -10 AV = -20 0.3 1 10 100 FREQUENCY (MHz) -90 -180 1K PHASE (DEGREES) OUTPUT VOLTAGE (mV) 120 VSUPPLY = ±5V, RF = 510Ω , TA = 25°C, RL = 100Ω, Unless Otherwise Specified FIGURE 4. INVERTING FREQUENCY RESPONSE FN2945.9 HFA1100 RL = 1kΩ 3 GAIN 0 -3 -6 RL = 50Ω RL = 100Ω PHASE 0 -90 RL = 1kΩ -180 RL = 100Ω -270 RL = 1kΩ 0.3 1 10 100 FREQUENCY (MHz) 1K -360 PHASE (DEGREES) RL = 100Ω RL = 50Ω GAIN (dB) 10 0 0.160VP-P 0.500VP-P 0.920VP-P 1.63VP-P -20 -30 0.3 1 10 100 FREQUENCY (MHz) RL = 100Ω RL = 50Ω -6 PHASE 0 -90 RL = 1kΩ -180 -270 1 -360 10 100 FREQUENCY (MHz) 1K FIGURE 6. FREQUENCY RESPONSE FOR VARIOUS LOAD RESISTORS 20 AV = +2 10 0 0.32VP-P -10 1.00VP-P -20 1.84VP-P -30 0.3 3.26VP-P 1 10 100 FREQUENCY (MHz) 1K FIGURE 8. FREQUENCY RESPONSE FOR VARIOUS OUTPUT VOLTAGES AV = +1 AV = +6 10 950 0 -10 BANDWIDTH (MHz) NORMALIZED GAIN (dB) -3 RL = 100Ω RL = 1kΩ 1K FIGURE 7. FREQUENCY RESPONSE FOR VARIOUS OUTPUT VOLTAGES 20 GAIN 0 RL = 50Ω RL = 100Ω NORMALIZED GAIN (dB) AV = +1 -10 RL = 1kΩ 3 0.3 FIGURE 5. FREQUENCY RESPONSE FOR VARIOUS LOAD RESISTORS 20 AV = +2, VOUT = 200mVP-P PHASE (DEGREES) AV = +1, VOUT = 200mVP-P 6 GAIN (dB) VSUPPLY = ±5V, RF = 510Ω , TA = 25°C, RL = 100Ω, Unless Otherwise Specified (Continued) NORMALIZED GAIN (dB) Typical Performance Curves 0.96VP-P TO 3.89VP-P -20 -30 900 850 800 750 700 0.3 1 10 100 FREQUENCY (MHz) FIGURE 9. FREQUENCY RESPONSE FOR VARIOUS OUTPUT VOLTAGES 6 1K -50 -25 0 25 50 75 100 125 TEMPERATURE (oC) FIGURE 10. -3dB BANDWIDTH vs TEMPERATURE FN2945.9 HFA1100 Typical Performance Curves VSUPPLY = ±5V, RF = 510Ω , TA = 25°C, RL = 100Ω, Unless Otherwise Specified (Continued) 25 0 2.5 180 135 PHASE 0.25 90 45 0 0.01 0.1 1 10 FREQUENCY (MHz) 100 GAIN (dB) GAIN PHASE (DEGREES) GAIN (kΩ) AV = +2 AV = -1 250 -0.05 -0.10 -0.15 -0.20 500 1 10 FREQUENCY (MHz) FIGURE 11. OPEN LOOP TRANSIMPEDANCE FIGURE 12. GAIN FLATNESS AV = +2, VOUT = 2V AV = +2 2.0 0.6 SETTLING ERROR (%) 1.5 DEVIATION (DEGREES) 100 1.0 0.5 0 -0.5 -1.0 -1.5 0.4 0.2 0 -0.2 -0.4 -0.6 -2.0 0 15 30 45 60 75 90 105 120 FREQUENCY (MHz) 135 150 -4 FIGURE 13. DEVIATION FROM LINEAR PHASE 1 6 11 16 21 26 TIME (ns) 31 36 41 46 FIGURE 14. SETTLING RESPONSE 40 2-TONE 35 INTERCEPT POINT (dBm) OUTPUT RESISTANCE (Ω) 1000 100 10 1 30 25 20 15 10 5 0.1 0 0 0.3 1 10 100 FREQUENCY (MHz) 1000 FIGURE 15. CLOSED LOOP OUTPUT RESISTANCE 7 100 200 300 FREQUENCY (MHz) 400 FIGURE 16. 3rd ORDER INTERMODULATION INTERCEPT FN2945.9 HFA1100 VSUPPLY = ±5V, RF = 510Ω , TA = 25°C, RL = 100Ω, Unless Otherwise Specified (Continued) -30 -30 -35 -40 -40 DISTORTION (dBc) DISTORTION (dBc) Typical Performance Curves 100MHz -45 50MHz -50 -55 -60 -50 100MHz -60 -70 -90 30MHz -110 -70 -5 -3 -1 1 3 5 7 9 OUTPUT POWER (dBm) 11 13 -5 15 -3 -1 3 5 7 9 11 13 15 FIGURE 18. 3rd HARMONIC DISTORTION vs POUT 35 RF = 360Ω VOUT = 2VP-P AV = +1 30 AV = +2 OVERSHOOT (%) VOUT = 1VP-P VOUT = 0.5VP-P VOUT = 2VP-P 25 RF = 360Ω VOUT = 1VP-P RF = 360Ω 20 VOUT = 0.5VP-P 15 10 5 RF = 510Ω VOUT = 2VP-P RF = 510Ω VOUT = 1VP-P RF = 510Ω VOUT = 0.5VP-P 0 100 200 300 400 500 600 700 800 100 900 1000 200 300 FIGURE 19. OVERSHOOT vs INPUT RISE TIME 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 400 500 600 700 800 900 1000 INPUT RISE TIME (ps) INPUT RISE TIME (ps) FIGURE 20. OVERSHOOT vs INPUT RISE TIME 25 AV = +2, tR = 200ps, VOUT = 2VP-P 24 SUPPLY CURRENT (mA) OVERSHOOT (%) 1 OUTPUT POWER (dBm) FIGURE 17. 2nd HARMONIC DISTORTION vs POUT OVERSHOOT (%) 30MHz -100 -65 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 50MHz -80 23 22 21 20 19 18 360 400 440 480 560 600 520 FEEDBACK RESISTOR (Ω) 640 680 FIGURE 21. OVERSHOOT vs FEEDBACK RESISTOR 8 -60 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (oC) FIGURE 22. SUPPLY CURRENT vs TEMPERATURE FN2945.9 HFA1100 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 5 6 7 8 9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 +IBIAS VIO -IBIAS -60 10 45 42 39 36 33 30 27 24 21 18 15 12 9 6 3 0 -40 -20 0 20 40 60 80 BIAS CURRENTS (µA) VSUPPLY = ±5V, RF = 510Ω , TA = 25°C, RL = 100Ω, Unless Otherwise Specified (Continued) INPUT OFFSET VOLTAGE (mV) SUPPLY CURRENT (mA) Typical Performance Curves 100 120 TEMPERATURE (oC) TOTAL SUPPLY VOLTAGE (V+ - V-, V) FIGURE 23. SUPPLY CURRENT vs SUPPLY VOLTAGE FIGURE 24. VIO AND BIAS CURRENTS vs TEMPERATURE 3.7 +VOUT 3.3 3.2 | - VOUT | 3.1 3 2.9 2.8 2.7 250 25 225 200 20 175 150 15 125 100 10 75 5 Eeni NI IiniNI Iini+ NI+ 2.6 2.5 -60 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (oC) FIGURE 25. OUTPUT VOLTAGE vs TEMPERATURE 9 0 100 1K 10K CURRENT NOISE (pA/√Hz) 275 3.5 3.4 300 30 AV = -1, RL = 50Ω VOLTAGE NOISE (nV/√Hz) OUTPUT VOLTAGE (V) 3.6 50 25 0 100K FREQUENCY (Hz) FIGURE 26. INPUT NOISE vs FREQUENCY FN2945.9 HFA1100 Die Characteristics DIE DIMENSIONS: PASSIVATION: 63 mils x 44 mils x 19 mils 1600µm x 1130µm Type: Nitride Thickness: 4kÅ ±0.5kÅ METALLIZATION: TRANSISTOR COUNT: Type: Metal 1: AlCu (2%)/TiW Thickness: Metal 1: 8kÅ ±0.4kÅ Type: Metal 2: AlCu (2%) Thickness: Metal 2: 16kÅ ±0.8kÅ 52 SUBSTRATE POTENTIAL (POWERED UP): Floating (Recommend Connection to V-) Metallization Mask Layout HFA1100 +IN -IN V- BAL VL VH BAL V+ OUT 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 10 FN2945.9