N CLC5654 Very High-Speed, Low-Cost, Quad Operational Amplifier General Description Features The CLC5654 is a quad, current feedback operational amplifier that is perfect for many cost-sensitive applications that require high performance. This device also offers excellent economy in board space and power, consuming only 5mA per amplifier while providing 70mA of output current capability. Applications requiring significant density of high speed devices such as video routers, matrix switches and high-order active filters will benefit from the configuration of the CLC5654 and the low channel-tochannel crosstalk of 70dB at 5MHz. ■ ■ ■ ■ ■ ■ ■ 450MHz small signal bandwidth 2000 V/µs slew rate 5mA / channel supply current -71/-82dBc HD2/HD3 (5MHz) 0.03%, 0.03° differential gain, phase 70mA output current 12ns settling to 0.1% Applications ■ The CLC5654 provides excellent performance for video applications. Differential gain and phase of 0.03% and 0.03° makes this device well suited for many professional composite video systems, but consumer applications will also be able to take advantage of these features due to the device’s low cost. The CLC5654 offers superior dynamic performance with a small signal bandwidth of 450MHz and slew rate of 2000V/µs. These attributes are well suited for many component video applications such as driving RGB signals down significant lengths of cable. These and many other application can also take advantage of the 0.1dB flatness to 40MHz. ■ ■ ■ ■ ■ High performance RGB video Video switchers & routers Video line driver Active filters IF amplifier Twisted pair driver/receiver Normalized Magnitude (0.5dB/div) Non-Inverting Frequency Response Combining wide bandwidth with low cost makes the the CLC5654 an attractive option for active filters. SAW filters are often used in IF filters in the 10’s of MHz range, but higher order filters designed around a quad operational amplifier may offer an economical alternative to the typical SAW approach and offer greater freedom in the selection of filter parameters. National Semiconductor’s Comlinear Products Group has published a wide array of liturature on active filters and a list of these publications can be found on the last page of this datasheet. Av = +2 Rf = 866Ω Vo = 0.25Vpp Av = +1 Rf = 2.21kΩ CLC5654 Very High-Speed, Low-Cost, Quad Operational Amplifier June 1999 Av = +5 Rf = 402Ω Av = +10 Rf = 200Ω 1M 10M 100M Frequency (Hz) Typical Configurations Non-Inverting Gain Inverting Gain + + + 0.1µF Rt - Rf 0.1µF Rg Rb Vo 1/4 CLC5654 + 6.8µF VEE © 1999 National Semiconductor Corporation Printed in the U.S.A. 0.1µF Vo 1/4 CLC5654 Vin Rg - Rf 0.1µF Rt Note: Rb provides DC bias for the non-inverting input. Select Rt to yield desired Rin = Rt || Rg. + + R Vo = A v = 1+ f Vin Rg DIP & SOIC 6.8µF 6.8µF Vin Pinout VCC VCC R Vo = Av = − f Vin Rg 6.8µF VEE http://www.national.com CLC5654 Electrical Characteristics (A v PARAMETERS Ambient Temperature = +2, Rf = 866Ω, RL = 100Ω, Vs = ±5V, unless specified) CONDITIONS CLC5654I TYP +25°C FREQUENCY DOMAIN RESPONSE -3dB bandwidth Av = 1 Vo < 0.5Vpp Vo < 5Vpp 0.1dB bandwidth differential gain NTSC, RL = 150Ω differential phase NTSC, RL = 150Ω TIME DOMAIN RESPONSE rise and fall time 0.5V step 5V step 2V step 0.5V step settling time to 0.1% overshoot slew rate DISTORTION AND NOISE RESPONSE 2nd harmonic distortion 2Vpp, 5MHz 3rd harmonic distortion 2Vpp, 5MHz equivalent input noise voltage (eni) >1MHz non-inverting current (ibn) >1MHz inverting current (ibi) >1MHz crosstalk (input inferred) 10MHz STATIC DC PERFORMANCE input offset voltage average drift input bias current (non-inverting) average drift input bias current (inverting) average drift power supply rejection ratio common-mode rejection ratio supply current (per channel) DC DC RL= ∞ MISCELLANEOUS PERFORMANCE input resistance (non-inverting) input capacitance (non-inverting) common-mode input range output voltage range RL = 150Ω output current output resistance, closed loop DC MIN/MAX RATINGS +25°C -40 to 85°C UNITS 450 350 100 40 0.03 0.03 – – – – – – – – – – – – MHz MHz MHz MHz dB dB 1.2 2.7 12 7 2000 – – – – – – – – – – ns ns ns % V/µs -71 -82 – – – – dBc dBc 3.3 2.5 12 76 – – – – – – – – nV/√Hz pA/√Hz pA/√Hz dBc 2.5 18 6 40 5 25 55 50 5 6 – 15 – 12 – 47 45 6.7 11 55 28 160 20 120 45 43 7 mV µV/˚C µA nA/˚C µA nA/˚C dB dB mA 1 1 ±2.2 ±2.6 70 0.2 0.5 2 ±2.0 ±2.5 50 0.3 0.25 2 ±1.4 ±2.3 40 0.6 MΩ pF V V mA mΩ NOTES A A A A Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined from tested parameters. Absolute Maximum Ratings Notes A) J-level: spec is 100% tested at +25°C. supply voltage (VCC - VEE) output current common-mode input voltage maximum junction temperature storage temperature range lead temperature (soldering 10 sec) Reliability Information Transistor Count MTBF (based on limited test data) 152 12.5Mhr Ordering Information Package Thermal Resistance Package Plastic (IN) Surface Mount (IM) http://www.national.com θJC θJA 60°C/W 55°C/W 110°C/W 125°C/W +14V 95mA VEE to VCC +150°C -65°C to +150°C +300°C Model CLC5654IN CLC5654IM CLC5654IMX 2 Temperature Range -40°C to +85°C -40°C to +85°C -40°C to +85°C Description 14-pin PDIP 14-pin SOIC 14-pin tape and reel CLC5654 Typical Performance (A v -45 -90 Av = +5 Rf = 402Ω -135 Av = +10 Rf = 200Ω -180 -225 1M 10M Av = -5 Rf = 402Ω Gain 0 -90 -135 Phase -180 -225 -270 Av = -1 Rf = 604Ω -315 Av = -10 Rf = 332Ω 1M 10M RL = 1kΩ 1M 100M 10M 2nd & 3rd Harmonic Distortion, RL = 1kΩ -60 3rd = 10MHz -70 -65 -70 Distortion (dBc) Distortion (dBc) 2nd RL = 100Ω 3rd RL = 100Ω -75 2nd RL = 1kΩ -80 -85 Vo = 4Vpp -80 2nd = 10MHz -90 2nd = 1MHz -100 3rd = 1MHz 3rd RL = 1kΩ -90 -110 -95 1M 100M 0 10M Frequency (Hz) 1 Frequency (Hz) 2 Output Amplitude (Vpp) 2nd & 3rd Harmonic Distortion, RL = 25Ω 2nd & 3rd Harmonic Distortion, RL = 100Ω -450 1000M 100M Frequency (Hz) -60 Vo = 2Vpp -270 Vo = 2Vpp -55 Vo = 1Vpp -90 -180 -360 2nd & 3rd Harmonic Distortion Vo = 0.1Vpp Magnitude (1dB/div) 0 RL = 25Ω -360 -50 10M Phase Frequency (Hz) Frequency (Hz) 1M Gain -405 100M Frequency Response vs. Vo RL = 100Ω Vo = 5Vpp -45 Magnitude (1dB/div) Normalized Magnitude (1dB/div) Normalized Magnitude (0.5dB/div) 0 Av = -2 Rf = 523Ω Vo = 0.25Vpp Phase (deg) Av = +1 Rf = 2.21kΩ 45 Phase (deg) Phase (deg) Av = +2 Rf = 866Ω Gain Phase Frequency Response vs. RL Inverting Frequency Response Non-Inverting Frequency Response Vo = 0.25Vpp = +2, Rf = 866Ω, RL = 100Ω, Vs = ±5V, unless specified) Large & Small Signal Pulse Response -50 -70 2nd = 5MHz -60 Distortion (dBc) Distortion (dBc) -80 3rd = 1MHz -90 -100 3rd = 10MHz 2nd = 1MHz -70 3rd = 1MHz -80 -90 2nd = 1MHz Large Signal Output Voltage (0.5V/div) Small Signal Output Voltage (0.1V/div) 2nd = 10MHz 3rd = 5MHz Small Signal Large Signal -100 -110 0 1 0 2 1 Time (10ns/div) 2 Output Amplitude (Vpp) Output Amplitude (Vpp) All Hostile Crosstalk Most Susceptible Channel Pulse Coupling Channel to Channel Gain Matching -50 -60 -70 -80 Active Channel Inactive Channel Magnitude (0.5dB/div) Magnitude (dB) -40 Channel 3 Phase (deg) -30 Inactive Amplitude (10mV/div) Active Amplitude (0.5V/div) -20 Channel 1 0 -45 Channel 2 -90 -135 Channel 4 -180 -90 -225 1M 100M 10M 1000M Time (50ns/div) 1M Frequency (Hz) Frequency (Hz) Open-Loop Transimpedance Gain, Z(s) 100 Voltage = 3.3nV/√Hz Non-Inverting Current = 2.5pA/√Hz 1k 10k 100k 1M Frequency (Hz) 10M 1 100M 180 100 140 Gain 90 120 80 100 Phase 70 80 60 60 50 40 40 20 30 1k 10k 100k 1M Frequency (Hz) 3 10M 0 100M 0.4 0.20 160 110 20 log[|Vo/Ii|/1Ω] 10 200 120 Phase 0.3 0.10 Gain 0 0.2 -0.10 0.1 -0.20 0 Phase (deg) 10 130 Phase (degrees) Inverting Current = 12pA/√Hz Noise Current (pA/√Hz) Noise Voltage (nV/√Hz) 100 Gain Flatness & Linear Phase Magnitude (0.05dB/div) Equivalent Input Noise 1 100 100M 10M -0.1 -0.30 0 10 20 30 40 50 Frequency (MHz) http://www.national.com CLC5654 Very High-Speed, Low-Cost, Quad Operational Amplifier Layout Considerations A proper printed circuit layout is essential for achieving high frequency performance. National provides evaluation boards for the CLC5654 (CLC730024 - DIP, CLC730031 - SOIC) and suggests their use as a guide for high frequency layout and as an aid for device testing and characterization. General layout and supply bypassing play major roles in high frequency performance. Follow the steps below as a basis for high frequency layout: Current Feedback Amplifiers Some of the key features of current feedback technology are: ■ Independence of AC bandwidth and voltage gain ■ Inherently stable at unity gain ■ Adjustable frequency response with Rf ■ High slew rate ■ Fast settling Current feedback operation can be described using a simple equation. The voltage gain for a non-inverting or inverting current feedback amplifier is approximated by Equation 1. Vo Av = Vi 1+ R f Z( jω ) ■ ■ Equation 1 ■ where: Av is the closed loop DC voltage gain Rf is the feedback resistor Z(jω) is the open loop transimpedance gain ■ ■ The denominator of Equation 1 is approximately equal to 1 at low frequencies. Near the -3dB corner frequency, the interaction between Rf and Z(jω) dominates the circuit performance. The value of the feedback resistor has a large affect on the circuits performance. Increasing Rf has the following affects: ■ Decreases loop gain ■ Decreases bandwidth ■ Reduces gain peaking ■ Lowers pulse response overshoot ■ Affects frequency response phase linearity ■ Include 6.8µF tantalum and 0.1µF ceramic capacitors on both supplies. Place the 6.8µF capacitors within 0.75 inches of the power pins. Place the 0.1µF capacitors less than 0.1 inches from the power pins. Remove the ground plane under and around the part, especially near the input and output pins to reduce parasitic capacitance. Minimize all trace lengths to reduce series inductances. Use flush-mount printed circuit board pins for prototyping, never use high profile DIP sockets. Active Filter Application Notes OA-21 Simplified Component Pre-Distortion for High Speed Active Filters OA-26 Designing High-Speed Active Filters OA-27 Low-Sensitivity, Lowpass Filter Design OA-28 Low-Sensitivity, Bandpass Filter Design with Tuning Method OA-29 Low-Sensitivity, Highpass Filter Design with Parasitic Compensation Customer Design Applications Support National Semiconductor is committed to design excellence. For sales, literature and technical support, call the National Semiconductor Customer Response Group at 1-800-272-9959 or fax 1-800-737-7018. Life Support Policy National’s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of National Semiconductor Corporation. As used herein: 1. Life support devices or systems are devices or systems which, a) are intended for surgical implant into the body, or b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. N National Semiconductor Corporation National Semiconductor Europe National Semiconductor Hong Kong Ltd. National Semiconductor Japan Ltd. 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 Fax: (+49) 0-180-530 85 86 E-mail: europe.support.nsc.com Deutsch Tel: (+49) 0-180-530 85 85 English Tel: (+49) 0-180-532 78 32 Francais Tel: (+49) 0-180-532 93 58 Italiano Tel: (+49) 0-180-534 16 80 2501 Miramar Tower 1-23 Kimberley Road Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960 Tel: 81-043-299-2309 Fax: 81-043-299-2408 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. http://www.national.com 4