85 MHz Current Feedback Amplifier Features General Description # b 3 dB bandwidth e 85 MHz, AV e 1 # b 3 dB bandwidth e 75 MHz, AV e 2 # NTSC/PAL dG s 0.03%, dP s 0.1§ # 50 mA output current # Drives g 2.5V into 100X load # Low voltage noise e 4 nV/0Hz # Current mode feedback # Low cost The EL2130 is a wideband current mode feedback amplifier optimized for gains between b 10 and a 10 while operating on g 5V power supplies. Built using Elantec’s Complementary Bipolar process, this device exhibits b 3 dB bandwidths in excess of 85 MHz at unity gain and 75 MHz at a gain of two. The EL2130 is capable of output currents in excess of 50 mA giving it the ability to drive either double or single terminated 50X coaxial cables. Applications # # # # # Video amplifier Video distribution amplifier Residue amplifiers in ADC Current to voltage converter Coaxial cable driver Ordering Information Part No. Temp. Range Pkg. Outline* EL2130CN 0§ C to a 75§ C 8-Pin P-DIP MDP0031 EL2130CS 0§ C to a 75§ C 8-Lead SO EL2130C EL2130C Exhibiting a Differential Gain of 0.03% and a Differential Phase of 0.1§ at NTSC and PAL frequencies. The EL2130 is an excellent low cost solution to most video applications. In addition, the EL2130 exhibits very low gain peaking, typically below 0.1 dB to frequencies in excess of 40 MHz as well as 50 ns settling time to 0.2% making it an excellent choice for driving flash A/D converters. The device is available in the plastic 8-lead narrow-body small outline (SO) and the 8-pin mini DIP packages, and operates over the temperature range of 0§ C to a 75§ C. Connection Diagram Mini DIP and SO MDP0027 2130 – 1 Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a ‘‘controlled document’’. Current revisions, if any, to these specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation. © 1990 Elantec, Inc. December 1995 Rev C Manufactured under U.S. Patent No. 4,893,091. EL2130C 85 MHz Current Feedback Amplifier Absolute Maximum Ratings (TA e 25§ C) Supply Voltage Input Voltage Differential Input Voltage Maximum Power Dissipation Input Current VS VIN DVIN PD IIN IOP TA TJ TST g 6V g VS g 6V See Curves g 10 mA Output Short Circuit Duration Operating Temperature Range: Operating Junction Temperature Storage Temperature s 5 sec 0§ C to a 75§ C 150§ C b 65§ C to a 150§ C Important Note: All parameters having Min/Max specifications are guaranteed. The Test Level column indicates the specific device testing actually performed during production and Quality inspection. Elantec performs most electrical tests using modern high-speed automatic test equipment, specifically the LTX77 Series system. Unless otherwise noted, all tests are pulsed tests, therefore TJ e TC e TA. Test Level I II III IV V Test Procedure 100% production tested and QA sample tested per QA test plan QCX0002. 100% production tested at TA e 25§ C and QA sample tested at TA e 25§ C , TMAX and TMIN per QA test plan QCX0002. QA sample tested per QA test plan QCX0002. Parameter is guaranteed (but not tested) by Design and Characterization Data. Parameter is typical value at TA e 25§ C for information purposes only. Open Loop DC Electrical Characteristics VS e g 5V; RL e % , unless otherwise specified Description Condition Temp Min 25§ C Input Offset Voltage Typ Max Test Level 2.0 10 I mV 15 III mV TMIN, TMAX DVOS/DT Offset Voltage Drift a IIN a Input Current 5.5 TMIN, TMAX b IIN a Input Current a RIN a Input Resistance 25§ C 10 25§ C 1.0 25§ C CIN a Input Capacitance CMRR Common Mode Rejection Ratio VCM e g 2.5V Input Current Common Mode Rejection VCM e g 2.5V PSRR Power Supply Rejection Ratio g 4.5V s VS s g 6V a IPSR a Input Current Power Supply Rejection g 4.5V s VS s g 6V b Input Current Power Supply Rejection g 4.5V s VS s g 6V b IPSR mV/§ C I mA 25 III mA 40 I mA 50 III mA 2.0 I MX 1.0 V pF 60 I dB 10 I mA/V 20 III mA/V I dB TMIN, TMAX b ICMR V 15 7 25§ C 25§ C 50 25§ C 5 TMIN, TMIN 25§ C 25§ C 60 70 0.1 TMIN, TMIN 25§ C TMIN, TMIN 2 Units 0.5 0.5 I mA/V 1.0 III mA/V 5.0 I mA/V 8.0 III mA/V TD is 3.0in Parameter VOS EL2130C 85 MHz Current Feedback Amplifier Open Loop DC Electrical Characteristics Parameter ROL Description Transimpedance Condition VOUT e g 2.5V, RL e 100X AVOL Open Loop DC Voltage Gain Temp Min Typ 25§ C 80 145 TMIN, TMAX 70 25§ C 60 RL e 100X TMIN, TMAX 56 RL e 100X VOUT e g 2.5V, Max Test Level Units I V/mA III V/mA 66 I dB III dB VO Output Voltage Swing 25§ C 3 3.5 I V IOUT Output Current 25§ C 30 50 I mA ROUT Output Resistance 25§ C 5 IS Quiescent Supply Current Full 17 ISC Short Circuit Current 25§ C 85 21 V X I mA V mA TD is 1.5in VS e g 5V; RL e % , unless otherwise specified Ð Contd. Closed Loop AC Electrical Characteristics Parameter Description Condition Test Level Units Slew Rate (Note 1) VO e 5 Vp-p 625 V V/ms tr Rise Time VO e 200 mV 4.6 V ns tf Fall Time VO e 200 mV 4.6 V ns tpd Prop Delay VO e 200 mV 4.0 V ns SSBW 3 dB Bandwidth VO e 100 mV 75 V MHz dG NTSC/PAL Diff Gain 0.03 V % dP NTSC/PAL Diff Phase 0.10 V deg (§ ) GFPL Gain Flatness 0.08 V dB SR Min f k 40 MHz Typ Max Note 1: Slew rate is measured with VO e 5Vp-p between b1.25V and a 1.25V and a 1.25V and b1.25V. 3 TD is 1.7in VS e g 5V, AV e a 2, RF e RG e 820X, RL e 100X, TA e 25§ C EL2130C 85 MHz Current Feedback Amplifier Typical Performance Curves Normalized Offset Voltage vs Temperature Equivalent Input Noise Common Mode Rejection Ratio vs Frequency Common Mode Rejection Ratio vs Temperature Power Supply Rejection Ratio vs Frequency Power Supply Rejection Ratio vs Temperature b Input Bias Current b Input Bias Current Power Supply Rejection Ratio b Input Bias Current Common Mode Rejection Ratio vs Temperature vs Temperature 2130 – 2 4 EL2130C 85 MHz Current Feedback Amplifier Typical Performance Curves Ð Contd. Supply Current vs Temperature vs Temperature a Input Bias Current Power Supply Rejection Ratio vs Temperature Transimpedance (ROL) vs Temperature Transimpedance (ROL) vs Frequency Open Loop Gain vs Temperature Frequency Response Output Voltage vs Temperature Short Circuit Current vs Temperature a Input Bias Current 2130 – 3 5 EL2130C 85 MHz Current Feedback Amplifier Typical Performance Curves Ð Contd. Large Signal Response Large Signal Response Long-Term Output Settling Error vs Time, VS e g 5V 2130 – 5 2130 – 4 AV e a 2, RF e 820X RL e 100X, CL e 12 pF AV e a 1, RF e 820X RL e 100X, CL e 12 pF 2130 – 6 Small Signal Response Small Signal Response 2130 – 7 AV e a 1, RF e 820X RL e 100X, CL e 12 pF Short Term Output Settling Error vs Time, VS e g 5V 2130 – 8 AV e a 2, RF e 820X RL e 100X, CL e 12 pF 2130 – 9 6 EL2130C 85 MHz Current Feedback Amplifier Typical Performance Curves Ð Contd. Bandwidth and Peaking vs RF for AV e a 1 Bandwidth and Peaking vs RF for AV e a 2 8-Lead Plastic DIP Maximum Power Dissipation vs Ambient Temperature Rise Time and Overshoot vs RF for AV e 1 Rise Time and Overshoot vs RF for AV e 2 8-Lead SO Maximum Power Dissipation vs Ambient Temperature 2130 – 10 Use of sockets, particularly for the SO package, should be avoided if possible. Sockets add parasitic inductance and capacitance which will result in peaking and overshoot. Applications Information Power Supply Bypassing The EL2130 will exhibit ringing or oscillation if the power supply leads are not adequately bypassed. 0.1 mF ceramic disc capacitors are suggested for both supply pins at a distance no greater than (/2 inch from the device. Surface mounting chip capacitors are strongly recommended. Video Characteristics and Applications Frequency domain testing is performed at Elantec using a computer controlled HP model 8656B Signal Generator and an HP Model 4195A Network/Spectrum Analyzer. The DUT test board is built using microwave/strip line techniques, and solid coaxial cables route the stimulus to the DUT socket. Signals are routed to and from the DUT test fixture using subminiature coaxial cable. Lead Dress A ground plane to which decoupling capacitors and gain setting resistors are terminated will eliminate overshoot and ringing. However, the ground plane should not extend to the vicinity of both the non-inverting and inverting inputs (pins 3 and 2) which would add capacitance to these nodes, and lead lengths from these pins should be made as short as possible. Differential Gain and Phase are tested at a noise gain of 2 with 100X load. Gain and Phase measurements are made with a DC input reference 7 EL2130C EL2130C 85 MHz Current Feedback Amplifier Applications Information Ð Contd. Capacitive Loads voltage at 0V and compared to those made at Vref equal to 0.7V at frequencies extending to 30 MHz. As can be seen from the Bode plot, the EL2130 will peak into capacitive loads greater than 20 pf. In many applications such as flash A/D’s, capacitive loading is unavoidable. In these cases, the use of a snubber network consisting of a 100X resistor in series with 47 pF capacitor from the output to ground is recommended. The EL2130 is capable of driving 100X to a minimum of 2.5V peak which means that it can naturally drive double terminated (50X) coaxial cables. Equivalent Circuit AC Test Circuit 2130 – 12 2130 – 11 General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the circuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. December 1995 Rev C WARNING Ð Life Support Policy Elantec, Inc. products are not authorized for and should not be used within Life Support Systems without the specific written consent of Elantec, Inc. Life Support systems are equipment intended to support or sustain life and whose failure to perform when properly used in accordance with instructions provided can be reasonably expected to result in significant personal injury or death. Users contemplating application of Elantec, Inc. products in Life Support Systems are requested to contact Elantec, Inc. factory headquarters to establish suitable terms & conditions for these applications. Elantec, Inc.’s warranty is limited to replacement of defective components and does not cover injury to persons or property or other consequential damages. Elantec, Inc. 1996 Tarob Court Milpitas, CA 95035 Telephone: (408) 945-1323 (800) 333-6314 Fax: (408) 945-9305 European Office: 44-71-482-4596 8 Printed in U.S.A.