 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| EL4430C EL4431C EL4430C EL4431C Video Instrumentation Amplifiers Features Fully differential inputs and feedback Differential input range of g2V General Description The EL4430 and 4431 are video instrumentation amplifiers which are ideal for line receivers differential-to-single-ended converters transducer interfacing and any situation where a differential signal must be extracted from a background of common-mode noise or DC offset These devices have two differential signal inputs and two differential feedback terminals The FB terminal connects to the amplifier output or a divided version of it to increase circuit gain and the REF terminal is connected to the output ground or offset reference The EL4430 is compensated to be stable at a gain of 1 or more and the EL4431 for a gain of 2 or more The amplifiers have an operational temperature of b 40 C to a 85 C and are packaged in plastic 8-pin DIP and SO-8 The EL4430 and EL4431 are fabricated with Elantec's proprietary complementary bipolar process which gives excellent signal symmetry and is free from latchup Common-mode range of g12V High CMRR at 4 MHz of 70 dB Stable at gains of 1 2 Calibrated and clean input clipping 4430 80 MHz G e 1 4431 160 MHz GBWP 380V ms slew rate 0 02% or differential gain or phase Operates on g5 to g15V supplies with no AC degradation Applications Line receivers ``Loop-through'' interface Level translation Magnetic head pre-amplification Differential-to-single-ended conversion Connection Diagram Ordering Information Part No Temp Range Package Outline EL4430CN b 40 C to a 85 C 8-pin P-DIP MDP0031 MDP0027 EL4430CS b 40 C to a 85 C 8-lead SO EL4431CN b 40 C to a 85 C 8-pin P-DIP MDP0031 MDP0027 EL4431CS b 40 C to a 85 C 8-lead SO 4430 - 1 January 1996 Rev D 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 1996 Elantec Inc EL4430C EL4431C Video Instrumentation Amplifiers Absolute Maximum Ratings (TA e 25 C) Va VS VIN DVIN IIN Positive Supply Voltage V a to Vb Supply Voltage Voltage at any Input or Feedback Difference between Pairs of Inputs or Feedback Current into any Input or Feedback Pin 16 5V 33V V a to Vb 6V 4 mA IOUT PD TA TS Continuous Output Current Maximum Power Dissipation Operating Temperature Range Storage Temperature Range 30 mA See Curves b 40 C to a 85 C b 60 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 RF e RG e 500X Parameter VDIFF Description Differential input voltage - Clipping (VCM e 0) 0 1% nonlinearity Common-mode range (VDIFF e 0) Input offset voltage EL4430 31 EL4430 31 VS e g5V VS e g15V EL4430 31 Power supplies at g5V TA e 25 For the EL4431 Test Level I V I I Min 20 Typ 23 18 Max Units V V V V mV mA mA kX dB dB % V V V V mA mA VCM VOS IB IOS RIN CMRR PSRR EG VO g2 g12 g3 0 g13 0 2 12 02 100 70 230 90 60 b1 5 g2 g12 g2 5 g12 5 8 20 2 I I I I I V Input bias current (IN a INb REF and FB terminals) Input offset current between IN a and INb and between REF and FB Input resistance Common-mode rejection ratio Power supply rejection ratio Gain error excluding feedback resistors Output voltage swing EL4430 31 EL4430 31 EL4430 VS e g5V VS e g15V EL4431 VS e g5V VS e g15V EL4430 31 b0 2 g2 8 g12 8 g3 0 g13 0 a0 5 I I I I I I ISC IS Output short-circuit current Supply current VS e g15V 40 90 13 5 16 I 2 TD is 3 5in EL4430C EL4431C Video Instrumentation Amplifiers Closed-Loop AC Electrical Characteristics Power supplies at g12V TA e 25 C RL e 500X for the EL4430 RL e 150X for the EL4431 CL e 15 pF For the EL4431 RF e RG e 500X Parameter BW b3 dB BW g0 1 dB Peaking SR VN dG di TS Description b 3 dB small-signal bandwidth Min EL4430 EL4431 EL4430 EL4431 EL4430 EL4431 All EL4430 31 EL4430 EL4431 RL e 150X EL4430 EL4431 RL e 150X EL4430 Typ 82 80 20 14 06 10 380 26 0 02 0 04 0 02 0 08 48 Max Test Level V V V V V V V V V V V V V Units MHz MHz MHz MHz dB dB V ms nV rt-Hz % % () () ns TD is 2 5in 0 1 dB flatness bandwidth Frequency response peaking Slew rate VOUT between b2V and a 2V Input-referred noise voltage density Differential gain error Voffset between b 0 7V and a 0 7V Differential gain error Voffset between b 0 7V and a 0 7V Settling time to 0 1% from a 4V step Test Circuit Typical Performance Curves EL4430 and EL4431 Common-Mode Rejection Ratio vs Frequency 4430 - 3 4430 - 4 3 EL4430C EL4431C Video Instrumentation Amplifiers Typical Performance Curves EL4430 Frequency Response vs Gain Contd EL4430 Frequency Response for Various RL CL VS e g5V EL4430 Frequency Response for Various RL CL VS e g15V 4430 - 5 4430 - 6 4430 - 7 EL4431 Frequency Response vs Gain EL4431 Frequency Response for Various RL CL VS e g5V EL4431 Frequency Response for Various RL CL VS e g15V 4430 - 8 4430 - 9 4430 - 10 4 EL4430C EL4431C Video Instrumentation Amplifiers Typical Performance Curves EL4430 Differential Gain and Phase vs Input Offset Voltage for VS e g5V Contd EL4430 Differential Gain and Phase vs Input Offset Voltage for VS e g12V EL4430 Differential Gain and Phase Error vs RL 4430 - 14 4430 - 15 4430 - 16 EL4431 Differential Gain and Phase vs Input Offset Voltage for VS e g5V EL4431 Differential Gain and Phase vs Input Offset Voltage for VS e g12V EL4431 Differential Gain and Phase Error vs RL 4430 - 17 4430 - 18 4430 - 19 EL4430 Nonlinearity vs Input Signal Span EL4431 Nonlinearity vs Input Signal Span 4430 - 20 4430 - 21 5 EL4430C EL4431C Video Instrumentation Amplifiers Typical Performance Curves EL4430 b 3 dB Bandwidth and Peaking vs Supply Voltage for AV e a 1 Contd EL4430 Gain b 3 dB Bandwidth and Peaking vs Load Resistance for AV e a 1 EL4430 b 3 dB Bandwidth and Peaking vs Die Temperature for AV e a 1 4430 - 23 4430 - 24 4430 - 25 EL4431 b 3 dB Bandwidth and Peaking vs Supply Voltage EL4431 b 3 dB Bandwidth and Peaking vs Die Temperature for AV e a 2 EL4431 Gain b 3 dB Bandwidth and Peaking vs Load Resistance for AV e a 2 4430 - 26 4430 - 27 4430 - 28 6 EL4430C EL4431C Video Instrumentation Amplifiers Typical Performance Curves Slew Rate vs Supply Voltage Contd Slew Rate vs Die Temperature Input Voltage and Current Noise vs Frequency 4430 - 32 4430 - 33 4430 - 34 Common Mode Input Range vs Supply Voltage Offset Voltage vs Die Temperature Bias Current vs Die Temperature 4430 - 35 4430 - 36 4430 - 37 Supply Current vs Supply Voltage Supply Current vs Die Temperature Power Dissipation vs Ambient Temperature 4430 - 38 4430 - 39 4430 - 40 7 EL4430C EL4431C Video Instrumentation Amplifiers Applications Information The EL4430 and EL4431 are designed to convert a fully differential input to a single-ended output It has two sets of inputs one which is connected to the signal and does not respond to its common-mode level and another which is used to complete a feedback loop with the output Here is a typical connection stray capacitance should be at least 200 MHz typical strays of 3 pF thus require a feedback impedance of 270X or less Two 510X resistors are acceptable for a gain of 2 300X and 2700X make a good gain-of-10 divider Alternatively a small capacitor across RF can be used to create more of a frequency-compensated divider The value of the capacitor should scale with the parasitic capacitance at the FB terminal input It is also practical to place small capacitors across both the feedback resistors (whose values maintain the desired gain) to swamp out parasitics For instance two 10 pF capacitors (for a gain of 2) across equal divider resistors will dominate parasitic effects and allow a higher divider resistance Input Connections 4430 - 2 The gain of the feedback divider is H The transfer function of the part is VOUT e AO c ((VIN a ) b (VIN b ) a (VREF b VFB)) VFB is connected to VOUT through a feedback network so VFB e H c VOUT AO is the openloop gain of the amplifier and is about 600 for the EL4430 and EL4431 The large value of AO drives (VIN a ) b (VIN b ) a (VREF b VFB)x0 Rearranging and substituting for VFB VOUT e ((VIN a ) b (VIN b ) a VREF ) H Thus the output is equal to the difference of the VIN's and offset by VREF all gained up by the feedback divider ratio The input impedance of the FB terminal (equal to RIN of the input terminals) is in parallel with an RG and raises circuit gain slightly The EL4430 is stable for a gain of 1 (a direct connection between VOUT and FB) or more and the EL4431 for gains of 2 or more It is important to keep the feedback divider's impedance at the FB terminal low so that stray capacitance does not diminish the loop's phase margin The pole caused by the parallel of resistors RF and RG and The input transistors can be driven from resistive and capacitive sources but are capable of oscillation when presented with an inductive input It takes about 80nH of series inductance to make the inputs actually oscillate equivalent to 4 of unshielded wiring or about 6 of unterminated input transmission line The oscillation has a characteristic frequency of 500 MHz Often placing one's finger (via a metal probe) or an oscilloscope probe on the input will kill the oscillation Normal high-frequency construction obviates any such problems where the input source is reasonably close to the input If this is not possible one can insert series resistors of approximately 51X to de-Q the inputs Signal Amplitudes Signal input common-mode voltage must be between (V b ) a 3V and (V a ) b 3V to ensure linearity Additionally the differential voltage on any input stage must be limited to g6V to prevent damage The differential signal range is g2V in the EL4430 and EL4431 The input range is substantially constant with temperature The Ground Pin The ground pin draws only 6mA maximum DC current and may be biased anywhere between (V b ) a 2 5V and (V a ) b 3 5V The ground pin is connected to the IC's substrate and frequency compensation components It serves as a shield within the IC and enhances CMRR over frequency and if connected to a potential other than ground it must be bypassed 8 EL4430C EL4431C Video Instrumentation Amplifiers Applications Information Power Supplies The instrumentation amplifiers work well on any supplies from g3V to g15 The supplies may be of different voltages as long as the requirements of the Gnd pin are observed ( see the Ground Pin section for a discussion) The supplies should be bypassed close to the device with short leads 4 7mF tantalum capacitors are very good and no smaller bypasses need be placed in parallel Capacitors as low as 0 01mF can be used if small load currents flow Single-polarity supplies such as a 12V with a 5V can be used where the ground pin is connected to a 5V and V- to ground The inputs and outputs will have to have their levels shifted above ground to accommodate the lack of negative supply The dissipation of the amplifiers increases with power supply voltage and this must be compatible with the package chosen This is a close estimate for the dissipation of a circuit PD e 2 c VS c IS max a (VS b VO) c VO RPAR where IS max is the maximum supply current VS is the g supply voltage (assumed equal) VO is the output voltage RPAR is the parallel of all resistors loading the output For instance the EL4431 draws a maximum of 16 mA and we might require a 2V peak output into 150X and a 270X a 270X feedback divider The RPAR is 117X The dissipation with g5V supplies is 201 mW The maximum supply voltage that the device can run on for a given PD and the other parameter is VS max e (PD a VO2 RPAR) (2IS a VO RPAR) Contd The maximum dissipation a package can offer is PD max e (TJ max b TA max) iJA where TJ max is the maximum die junction temperature 150 C for reliability less to retain optimum electrical performance TA max is the ambient temperature 70 C for commercial and 85 C for industrial range iJA is the thermal resistance of the mounted package obtained from datasheet dissipation curves The more difficult case is the SO-8 package With a maximum die temperature of 150 C and a maximum ambient temperature of 85 C the 65 C temperature rise and package thermal resistance of 170 C W gives a dissipation of 382 mW at 85 C This allows a maximum supply voltage of g8 5V for the EL4431 operated in our example If an %) EL4430 were driving a light load (RPAR it could operate on g15V supplies at a 70 C maximum ambient x Output Loading The output stage of the instrumentation amplifiers is very powerful It typically can source 80 mA and sink 120 mA Of course this is too much current to sustain and the part will eventually be destroyed by excessive dissipation or by metal traces on the die opening The metal traces are completely reliable while delivering the 30 mA continuous output given in the Absolute Maximum Ratings table in this datasheet or higher purely transient currents Gain or gain accuracy degrades only 10% from no load to 100X load Heavy resistive loading will degrade frequency response and video distortion for loads k 100X Capacitive loads will cause peaking in the frequency response If capacitive loads must be driven a small-valued series resistor can be used to isolate it (12X to 51X should suffice) A 22X series resistor will limit peaking to 2 5 dB with even a 220 pF load 9 EL4430C EL4431C Video Instrumentation Amplifiers Macromodel This is a Pspice-compatible macromodel of the EL4430 video instrumentation amplifier assembled as a subcircuit The pins are numbered sequentially as the subcircuit interface nodes T1 is a transmission line which provides a good emulation of the more complicated real device This model correctly displays the characteristics of input clipping frequency response CMRR both AC and DC output clipping output sensitivity to capacitive loads gain accuracy slewrate limiting input bias current and impedance The macromodel does not exhibit proper results with respect to supply current supply sensitivities offsets output current limit differential gain or phase nor temperature Connections IN a VIN b l Vb l l Va l l l VFB l l l l VREF l l l l l SUBCKT EL4430 EL EL4430 macromodel 3 l l l 4 l l l 2 l l l 7 l l l 6 l l l 5 l l l VOUT 8 l l GND 1 l i1 7 10 i2 7 11 i3 7 12 i4 7 13 v1 7 14 v2 7 15 v3 19 2 c1 c2 c3 c4 r1 r2 r3 r4 r5 r6 r7 r8 11 12 18 16 10 12 10 16 17 18 23 21 00103 00103 00105 00105 3 3 3 1 03p 1 03p 1 2 1p 17 0 6p 11 2000 13 2000 1 30e6 2 1000 2 1000 1 1 27e6 21 20 8 100 11 21 8 50n d1 11 14 diode d2 12 14 diode d3 18 15 diode d4 19 18 diode model diode d(tt e 120n) q1 16 3 10 q2 17 4 11 q3 16 5 12 q4 17 6 13 model pnp 1 pnp 1 pnp 1 pnp 1 pnp pnp (bf e 90 va e 44 tr e 50n) ENDS 10 TD is 7 0in g1 18 1 17 16 0005 e1 20 1 1 18 1 0 t1 22 1 20 1 z0 e 50 td e 1 5n r1t1 22 1 50 e2 23 1 22 1 1 0 EL4430C EL4431C Video Instrumentation Amplifiers EL4430C EL4431C Macromodel Contd 4430 - 41 11 EL4430C EL4431C EL4430C EL4431C Video Instrumentation Amplifiers 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 WARNING Life Support Policy January 1996 Rev D 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 12 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 Printed in U S A |
Price & Availability of EL4430
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |