NCS2511 1 GHz Current Feedback Op Amp NCS2511 is a 1 GHz current feedback monolithic operational amplifier featuring high slew rate and low differential gain and phase error. The current feedback architecture allows for a superior bandwidth and low power consumption. http://onsemi.com Features −3.0 dB Small Signal BW (AV = +2.0, VO = 0.5 Vp−p) 1 GHz Typ Slew Rate 2500 V/ms Supply Current 7.5 mA Input Referred Voltage Noise 5.0 nV/ ǸHz THD −67 dB (f = 5.0 MHz, VO = 2.0 Vp−p) Output Current 120 mA Pin Compatible with AD8001, TSH350, OPA681 This is a Pb−Free Device Applications • • • • • • High Resolution Video Line Driver High−Speed Instrumentation Wide Dynamic Range IF Amp Set Top Box NTSC/PAL/HDTV MARKING DIAGRAM 5 SOT23−5 (TSOP−5) SN SUFFIX CASE 483 5 1 YB1 A Y W G YB1AYW G 1 = NCS2511 = Assembly Location = Year = Work Week = Pb−Free Package SOT23−5 (TSOP−5) PINOUT OUT 1 VEE 2 +IN 3 6 + • • • • • • • • 5 VCC 4 −IN − NORMALIZED GAIN (dB) 3 (Top View) 0 VOUT = 2.0 VPP −3 ORDERING INFORMATION −6 −9 −12 −15 10k AV = +2 VS = "5 V RF = 270 W RL = 150 W 100k VOUT = 0.5 VPP 1M 10M 100M FREQUENCY (Hz) 1G May, 2006 − Rev. 2 Package Shipping† NCS2511SNT1G SOT23−5 (TSOP−5) (Pb−Free) 3000/Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. 10G Figure 1. Frequency Response: Gain (dB) vs. Frequency Av = +2.0 © Semiconductor Components Industries, LLC, 2006 Device 1 Publication Order Number: NCS2511/D NCS2511 PIN FUNCTION DESCRIPTION Pin (SOT23/SC70) Symbol Function 1 OUT Output Equivalent Circuit VCC ESD OUT VEE 2 VEE Negative Power Supply 3 +IN Non−inverted Input VCC ESD ESD +IN −IN VEE 4 −IN Inverted Input 5 VCC Positive Power Supply See Above VCC +IN OUT −IN CC VEE Figure 2. Simplified Device Schematic http://onsemi.com 2 NCS2511 ATTRIBUTES Characteristics Value ESD Human Body Model Machine Model Charged Device Model 2.0 kV (Note 1) 200 V 1.0 kV Moisture Sensitivity (Note 2) Flammability Rating Level 1 Oxygen Index: 28 to 34 UL 94 V−0 @ 0.125 in 1. 0.8 kV between the input pairs +IN and −IN pins only. All other pins are 2.0 kV. 2. For additional information, see Application Note AND8003/D. MAXIMUM RATINGS Symbol Rating Unit Power Supply Voltage Parameter VS 11 Vdc Input Voltage Range VI vVS Vdc Input Differential Voltage Range VID vVS Vdc Output Current IO 120 mA Maximum Junction Temperature (Note 3) TJ 150 °C Operating Ambient Temperature TA −40 to +85 °C Storage Temperature Range Tstg −60 to +150 °C Power Dissipation PD (See Graph) mW RqJA 121 °C/W Thermal Resistance, Junction−to−Air Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 3. Power dissipation must be considered to ensure maximum junction temperature (TJ) is not exceeded. MAXIMUM POWER DISSIPATION MAXIMUM POWER DISSIPATION (mW) 1800 The maximum power that can be safely dissipated is limited by the associated rise in junction temperature. For the plastic packages, the maximum safe junction temperature is 150°C. If the maximum is exceeded momentarily, proper circuit operation will be restored as soon as the die temperature is reduced. Leaving the device in the “overheated’’ condition for an extended period can result in device damage. To ensure proper operation, it is important to observe the derating curves. 1600 1400 SOT23 Pkg 1200 1000 800 600 400 200 0 −50 −25 0 50 75 25 100 AMBIENT TEMPERATURE (°C) 125 150 Figure 3. Power Dissipation vs. Temperature http://onsemi.com 3 NCS2511 AC ELECTRICAL CHARACTERISTICS (VCC = +5.0 V, VEE = −5.0 V, TA = −40°C to +85°C, RL = 150 W to GND, RF = 270 W, AV = +2.0, Enable is left open, unless otherwise specified). Symbol Characteristic Conditions Min Typ Max Unit FREQUENCY DOMAIN PERFORMANCE BW GF0.1dB Bandwidth 3.0 dB Small Signal 3.0 dB Large Signal 0.1 dB Gain Flatness Bandwidth MHz AV = +2.0, VO = 0.5 Vp−p AV = +2.0, VO = 2.0 Vp−p 1000 800 AV = +2.0 50 MHz dG Differential Gain AV = +2.0, RL = 150 W, f = 3.58 MHz 0.01 % dP Differential Phase AV = +2.0, RL = 150 W, f = 3.58 MHz 0.01 ° Slew Rate AV = +2.0, Vstep = 2.0 V 2500 V/ms Settling Time 0.1% AV = +2.0, Vstep = 2.0 V 13 ns (10%−90%) AV = +2.0, Vstep = 2.0 V 1.5 ns TIME DOMAIN RESPONSE SR ts tr tf Rise and Fall Time HARMONIC/NOISE PERFORMANCE THD Total Harmonic Distortion f = 5.0 MHz, VO = 2.0 Vp−p −67 dB HD2 2nd Harmonic Distortion f = 5.0 MHz, VO = 2.0 Vp−p −72 dBc HD3 3rd Harmonic Distortion f = 5.0 MHz, VO = 2.0 Vp−p −70 dBc IP3 Third−Order Intercept f = 10 MHz, VO = 1.0 Vp−p 35 dBm Spurious−Free Dynamic Range f = 5.0 MHz, VO = 2.0 Vp−p 70 dBc SFDR eN Input Referred Voltage Noise f = 1.0 MHz 5.0 nVń ǸHz iN Input Referred Current Noise f = 1.0 MHz, Inverting f = 1.0 MHz, Non−Inverting 20 30 pAń ǸHz http://onsemi.com 4 NCS2511 DC ELECTRICAL CHARACTERISTICS (VCC = +5.0 V, VEE = −5.0 V, TA = −40°C to +85°C, RL = 150 W to GND, RF = 270 W, AV = +2.0, Enable is left open, unless otherwise specified). Symbol Characteristic Conditions Min Typ Max Unit −10 0 +10 mV DC PERFORMANCE VIO DVIO/DT IIB DIIB/DT Input Offset Voltage (Note 4) Input Offset Voltage Temperature Coefficient Input Bias Current 6.0 mV/°C +Input (Non−Inverting), VO = 0 V −Input (Inverting), VO = 0 V (Note 4) "3.0 "6.0 +Input (Non−Inverting), VO = 0 V −Input (Inverting), VO = 0 V +40 −10 nA/°C "3.0 "4.0 V 40 50 dB 150 70 kW W 1.0 pF 0.1 30 W Input Bias Current Temperature Coefficient "35 "35 mA INPUT CHARACTERISTICS VCM CMRR Input Common Mode Voltage Range (Note 4) Common Mode Rejection Ratio (Note 4) RIN Input Resistance CIN Differential Input Capacitance (See Graph) +Input (Non−Inverting) −Input (Inverting) OUTPUT CHARACTERISTICS ROUT Output Resistance Closed Loop Open Loop VO Output Voltage Range "3.0 "4.0 V IO Output Current "90 "120 mA 10 V 7.5 mA 55 dB POWER SUPPLY VS Operating Voltage Supply IS Power Supply Current PSRR Power Supply Rejection Ratio (Note 4) VO = 0 V (See Graph) 4. Guaranteed by design and/or characterization. http://onsemi.com 5 40 NCS2511 AC ELECTRICAL CHARACTERISTICS (VCC = +2.5 V, VEE = −2.5 V, TA = −40°C to +85°C, RL = 150 W to GND, RF = 270 W, AV = +2.0, Enable is left open, unless otherwise specified). Symbol Characteristic Conditions Min Typ Max Unit FREQUENCY DOMAIN PERFORMANCE BW GF0.1dB Bandwidth 3.0 dB Small Signal 3.0 dB Large Signal 0.1 dB Gain Flatness Bandwidth MHz AV = +2.0, VO = 0.5 Vp−p AV = +2.0, VO = 1.0 Vp−p 800 500 AV = +2.0 40 MHz dG Differential Gain AV = +2.0, RL = 150 W, f = 3.58 MHz 0.01 % dP Differential Phase AV = +2.0, RL = 150 W, f = 3.58 MHz 0.01 ° Slew Rate AV = +2.0, Vstep = 1.0 V 1500 V/ms Settling Time 0.1% AV = +2.0, Vstep = 1.0 V 10 ns (10%−90%) AV = +2.0, Vstep = 1.0 V 1.2 ns TIME DOMAIN RESPONSE SR ts tr tf Rise and Fall Time HARMONIC/NOISE PERFORMANCE THD Total Harmonic Distortion f = 5.0 MHz, VO = 1.0 Vp−p −57 dB HD2 2nd Harmonic Distortion f = 5.0 MHz, VO = 1.0 Vp−p −62 dBc HD3 3rd Harmonic Distortion f = 5.0 MHz, VO = 1.0 Vp−p −60 dBc IP3 Third−Order Intercept f = 10 MHz, VO = 0.5 Vp−p 28 dBm Spurious−Free Dynamic Range f = 5.0 MHz, VO = 1.0 Vp−p 60 dBc SFDR eN Input Referred Voltage Noise f = 1.0 MHz 5.0 nVń ǸHz iN Input Referred Current Noise f = 1.0 MHz, Inverting f = 1.0 MHz, Non−Inverting 20 30 pAń ǸHz http://onsemi.com 6 NCS2511 DC ELECTRICAL CHARACTERISTICS (VCC = +2.5 V, VEE = −2.5 V, TA = −40°C to +85°C, RL = 150 W to GND, RF = 270 W, AV = +2.0, Enable is left open, unless otherwise specified). Symbol Characteristic Conditions Min Typ Max Unit −10 0 +10 mV DC PERFORMANCE VIO DVIO/DT IIB DIIB/DT Input Offset Voltage (Note 5) Input Offset Voltage Temperature Coefficient Input Bias Current 6.0 mV/°C +Input (Non−Inverting), VO = 0 V −Input (Inverting), VO = 0 V (Note 5) "3.0 "6.0 +Input (Non−Inverting), VO = 0 V −Input (Inverting), VO = 0 V +40 −10 nA/°C "1.1 "1.5 V 40 50 dB 150 70 kW W 1.0 pF 0.1 30 W Input Bias Current Temperature Coefficient "35 "35 mA INPUT CHARACTERISTICS VCM CMRR Input Common Mode Voltage Range (Note 5) Common Mode Rejection Ratio (Note 5) RIN Input Resistance CIN Differential Input Capacitance (See Graph) +Input (Non−Inverting) −Input (Inverting) OUTPUT CHARACTERISTICS ROUT Output Resistance Closed Loop Open Loop VO Output Voltage Range "1.1 "1.5 V IO Output Current "90 "120 mA 5.0 V 6.5 mA 55 dB POWER SUPPLY VS Operating Voltage Supply IS Power Supply Current PSRR VO = 0 V Power Supply Rejection Ratio (Note 5) (See Graph) 40 5. Guaranteed by design and/or characterization. VIN + − VOUT RL RF RF Figure 4. Typical Test Setup (AV = +2.0, RF = 270 W, RL = 150 W) http://onsemi.com 7 6 6 3 3 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) NCS2511 0 VOUT = 2.0 VPP −3 −6 −9 −12 −15 10k VOUT = 0.5 VPP AV = +2 VS = "5 V RF = 270 W RL = 150 W 100k VOUT = 1 VPP 0 −3 −6 VOUT = 0.5 VPP −9 −12 1M 10M 100M FREQUENCY (Hz) 1G −15 10k 10G 6 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) AV = +2 −6 −12 −15 10k VOUT= 1.0 VPP VS = ±5 V RF = 270 W RL = 150 W 100k 1M 10M 100M 1G 10G AV = +1 3 0 −9 1M 10M 100M FREQUENCY(Hz) 6 AV = +1 −3 100k Figure 6. Frequency Response Gain (dB) vs. Frequency Av = +1.0 Figure 5. Frequency Response: Gain (dB) vs. Frequency Av = +2.0 3 AV = +1 VS = "5 V RF = 270 W RL = 150 W 1G 0 −3 AV = +2 −6 −9 −12 −15 10k 10G VOUT= 0.5 VPP VS = ±5 V RF = 270 W RL = 150 W 100k FREQUENCY (Hz) 1M 10M 100M FREQUENCY (Hz) 1G Figure 7. Large Signal Frequency Response Gain (dB) vs. Frequency Figure 8. Small Signal Frequency Response Gain (dB) vs. Frequency VS = ±5 V VS = ±5 V Vin Vin Vout Vout Figure 10. Large Signal Step Response Vertical: 2.0 V/div Horizontal: 10 ns/div Figure 9. Small Signal Step Response Vertical: 1.0 V/div Horizontal: 10 ns/div http://onsemi.com 8 10G NCS2511 −40 −40 VOUT = 2 VPP VS = ±5 V RF = 270 W RL = 150 W −50 −55 THD HD3 −60 −65 −75 1 −50 −55 −60 THD −65 HD3 HD2 −70 f = 5 MHz VS = ±5 V RF = 270 W RL = 150 W −45 DISTORTION (dB) DISTORTION (dB) −45 −70 −75 100 10 HD2 0 1 0.5 1.5 FREQUENCY (MHz) 0 VS = ±5 V 4.5 4 VS = "5 V −10 50 −20 CMRR (dB) VOLTAGE NOISE (nV/√Hz) 70 40 30 20 −30 −40 −50 10 0 100 1k 10k 100k FREQUENCY (Hz) −60 10k 1M Figure 13. Input Referred Voltage Noise vs. Frequency 1M FREQUENCY (Hz) 0.02 0.015 DIFFERENTIAL GAIN (%) −10 −20 −30 10M 100M 4.43 MHz 0.01 VS = ±5 V RL = 150 W AV = +2 20 MHz 3.58 MHz 0.005 0 −0.005 −40 +5 V −50 100k 1M FREQUENCY (Hz) −0.01 50 MHz −0.015 −5 V −60 10k 100k Figure 14. CMRR vs. Frequency 0 PSRR (dB) 3.5 Figure 12. THD, HD2, HD3 vs. Output Voltage Figure 11. THD, HD2, HD3 vs. Frequency 60 2 2.5 3 Vout (VPP) 10M 100M −0.02 −0.8 Figure 15. PSRR vs. Frequency −0.6 10 MHz 0.2 −0.4 −0.2 0 0.4 OFFSET VOLTAGE (V) Figure 16. Differential Gain http://onsemi.com 9 0.6 0.8 NCS2511 0.02 10 0.01 0.005 VS = ±5 V RL = 150 W AV = +2 4.43 MHz 9 CURRENT (mA) DIFFERENTIAL PHASE (°) 0.015 3.58 MHz 0 −0.005 −0.01 20 MHz −0.015 10 MHz −0.02 −0.8 8 25°C 7 −40°C 6 5 50 MHz 0.4 −0.4 −0.2 0 0.2 OFFSET VOLTAGE (V) −0.6 85°C 4 0.6 0.8 4 5 Figure 17. Differential Phase 6 7 8 9 POWER SUPPLY VOLTAGE (V) 11 Figure 18. Supply Current vs. Power Supply (Enabled) 8 1M 7.5 7 VS = ±5.0 V RF = 270 W RL = 150 W 100k 6.5 TRANSIMPEDANCE (W) OUTPUT VOLTAGE (VPP) 10 25°C 6 85°C 5.5 −40°C 5 4.5 4 10k 1k 100 3.5 3 4 5 6 8 7 9 10 10 10k 11 100k 1M POWER SUPPLY VOLTAGE (V) Figure 19. Output Voltage Swing vs. Supply Voltage 10G 6 NORMALIZED GAIN (dB) OUTPUT RESISTANCE (W) 1G 9 VS ±5.0 V 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 10k 100M Figure 20. Transimpedance (ROL) vs. Frequency 2.0 1.8 10M FREQUENCY (Hz) 3 0 10 pF −3 47 pF −6 −9 −12 100k 1M 10M 100M −15 10k AV = +2 VOUT = 0.5 Vpp VS = ±5.0 V RF = 270 W RL = 150 W 100k 100 pF 1M 10M 100M 1G 10G FREQUENCY (Hz) FREQUENCY (Hz) Figure 21. Closed−Loop Output Resistance vs. Frequency Figure 22. Frequency Response vs. Capacitive Load http://onsemi.com 10 NCS2511 General Design Considerations use a current feedback amplifier with the output shorted directly to the inverting input. The current feedback amplifier is optimized for use in high performance video and data acquisition systems. For current feedback architecture, its closed−loop bandwidth depends on the value of the feedback resistor. The closed−loop bandwidth is not a strong function of gain, as is for a voltage feedback amplifier, as shown in Figure 23. 100 W 150 W Proper high speed PCB design rules should be used for all wideband amplifiers as the PCB parasitics can affect the overall performance. Most important are stray capacitances at the output and inverting input nodes as it can effect peaking and bandwidth. A space (3/16″ is plenty) should be left around the signal lines to minimize coupling. Also, signal lines connecting the feedback and gain resistors should be short enough so that their associated inductance does not cause high frequency gain errors. Line lengths less than 1/4″ are recommended. 270 W 330 W GAIN (dB) 24 21 18 15 12 9 6 3 0 −3 −6 −9 −12 −15 AV = +2 −18 VCC = +5 V −21 RL = 150 W −24 10k 100k Printed Circuit Board Layout Techniques 400 W 450 W 500 W 1M 10M 100M Video Performance 1G This device designed to provide good performance with NTSC, PAL, and HDTV video signals. Best performance is obtained with back terminated loads as performance is degraded as the load is increased. The back termination reduces reflections from the transmission line and effectively masks transmission line and other parasitic capacitances from the amplifier output stage. 10G FREQUENCY (Hz) ESD Protection Figure 23. Frequency Response vs. RF All device pins have limited ESD protection using internal diodes to power supplies as specified in the attributes table (see Figure 24). These diodes provide moderate protection to input overdrive voltages above the supplies. The ESD diodes can support high input currents with current limiting series resistors. Keep these resistor values as low as possible since high values degrade both noise performance and frequency response. Under closed−loop operation, the ESD diodes have no effect on circuit performance. However, under certain conditions the ESD diodes will be evident. If the device is driven into a slewing condition, the ESD diodes will clamp large differential voltages until the feedback loop restores closed−loop operation. Also, if the device is powered down and a large input signal is applied, the ESD diodes will conduct. NOTE: Human Body Model for +IN and –IN pins are rated at 0.8kV while all other pins are rated at 2.0kV. The −3.0 dB bandwidth is, to some extent, dependent on the power supply voltages. By using lower power supplies, the bandwidth is reduced, because the internal capacitance increases. Smaller values of feedback resistor can be used at lower supply voltages, to compensate for this affect. Feedback and Gain Resistor Selection for Optimum Frequency Response A current feedback operational amplifier’s key advantage is the ability to maintain optimum frequency response independent of gain by using appropriate values for the feedback resistor. To obtain a very flat gain response, the feedback resistor tolerance should be considered as well. Resistor tolerance of 1% should be used for optimum flatness. Normally, lowering RF resistor from its recommended value will peak the frequency response and extend the bandwidth while increasing the value of RF resistor will cause the frequency response to roll off faster. Reducing the value of RF resistor too far below its recommended value will cause overshoot, ringing, and eventually oscillation. Since each application is slightly different, it is worth some experimentation to find the optimal RF for a given circuit. A value of the feedback resistor that produces X0.1 dB of peaking is the best compromise between stability and maximal bandwidth. It is not recommended to VCC Internal Circuitry External Pin VEE Figure 24. Internal ESD Protection http://onsemi.com 11 NCS2511 PACKAGE DIMENSIONS TSOP−5 SN SUFFIX CASE 483−02 ISSUE E NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. 4. A AND B DIMENSIONS DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR GATE BURRS. D S 5 4 1 2 L A 3 B G J C 0.05 (0.002) DIM A B C D G H J K L M S H M K MILLIMETERS MIN MAX 2.90 3.10 1.30 1.70 0.90 1.10 0.25 0.50 0.85 1.05 0.013 0.100 0.10 0.26 0.20 0.60 1.25 1.55 0_ 10 _ 2.50 3.00 INCHES MIN MAX 0.1142 0.1220 0.0512 0.0669 0.0354 0.0433 0.0098 0.0197 0.0335 0.0413 0.0005 0.0040 0.0040 0.0102 0.0079 0.0236 0.0493 0.0610 0_ 10 _ 0.0985 0.1181 SOLDERING FOOTPRINT* 0.95 0.037 1.9 0.074 2.4 0.094 1.0 0.039 0.7 0.028 SCALE 10:1 mm Ǔ ǒinches *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. 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