GB4550 GENNUM | Alldatasheet

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Technical content

GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946 Japan Branch: A-302, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3334-7700 fax: (03) 3247-8839

DESCRIPTION

The GB4550 and GB4550A are high performance mono- lithic video buffer/clamps made on Gennum's LSI process. They feature a wideband differential amplifier that can be configured as a gain stage. The output signal voltage is limited to +2V above the clamp level in order to prevent damage to crosspoints connected to the output. The clamping level can be set for normal sync tip clamping by connecting pin 4 to -0.286 volts. For other applications, the clamping voltage level can be varied from -5.5 to +5.5 volts. The GB4550A features a tight delay spread of only ± 0.15 degrees while the GB4550 maintains a ± 1.5 degree delay spread. Both devices operate from ± 9 to ± 12 V power supplies and will directly interface with Gennum's video crosspoint switches. The 8 pin SIP package is ideally suited for space restricted board layouts.

APPLICATIONS

  • Input buffering and clamping to crosspoint switches
  • Inter - system video signal clamping

FEATURES

  • adjustable clamp level from -5.5 V to +5.5 V at ±10 V supplies.
  • ultra low differential gain (0.02% typ.) and differential phase (0.03° typ.)
  • wideband unity gain: GB4550 ±0.2 dB at 25 MHz GB4550A ±0.1 dB at 25 MHz
  • both drive 150pF loads at full power, flat to 10 MHz.
  • GB4550A — tight delay spread of ±0.15°at colorburst.
  • convenient 8 pin SIP packaging.
  • both can be configured as a gain stage with reduced bandwidth. Document No. 520 - 34 - 4 GB4550 & GB4550A Monolithic Video Buffer/Clamp DATA SHEET 1 2 3 4 5 6 7 8 GB4550 and GB4550A Pin No. GB4550 GB4550A Function 1 +IN +IN non-inverting input CC VCC positive power supply

3 COMP NC frequency compensation or NC

CL VCL clamp voltage input 5C X CX external capacitor 6V EE VEE negative power supply 7 -IN -IN inverting input

8 OUT OUT output

+IN 10pF C X VCL COMP OUT 30k 100k 7mA Nominal -IN VCC VEE 30k (+2 V OUTPUT CLAMP) (NC on GB4550A) SIMPLIFIED CIRCUIT DIAGRAM

ORDERING INFORMATION

Part Number Package Type Temperature Range GB4550 - CSA 8 pin SIP 0 to 70oC GB4550ACSA 8 pin SIP 0 to 70oC PIN CONNECTIONS All resistors in ohms, all capacitors in microfarads unless otherwise stated Revision Date: February 1994

Supply Voltage VS ± 13.5 V Operating Temperature Range 0 °C ≤ TA ≤ 70° C Storage Temperature Range -65 °C ≤ TS ≤ 150° C Lead Temperature (Soldering, 10 Sec) 260 ° C Differential Video Input Voltage ± 5 V Clamp Input Voltage V EE + 2.5 V ≤ VCL ≤ Vcc - 2.5 V Supply Voltage V S Operating Range ± 9 ± 10 ± 12 V + Supply Current I+ - 9 13.8 mA - Supply Current I- - 9 13.8 mA Maximum Input Voltage Above V CL VIN MAX 2.0 2.25 V Insertion Loss I.L. ƒ = 100kHz - - 0.03 dB Full Power Bandwidth FPBW -3.0dB, V IN = 1V p-p 15 18 - MHz Small Signal Bandwidth SSBW ± 0.2dB, V IN = 100mV p-p 20 25 - MHz Frequency Response at 10MHz, V IN = 1V p-p - 0.05 - dB Signal Path Delay ø D at 3.58MHz - -8 - deg Delay Tolerance at 3.58MHz - ± 1.5 - deg Full Power Bandwidth FPBW -3.0dB, V IN = 1V p-p 17 20 - MHz Small Signal Bandwidth SSBW ± 0,1dB, V IN=100mV p-p, C L=100pF 25 30 - MHz Frequency Response at 10MHz, V IN = 1V p-p - 0.1 - dB Signal Path Delay ø D at 3.58 MHz - -7.5 - deg Delay Tolerance at 3.58MHz - ± 0.15 - deg Differential Gain dg at 3.58MHz - 0.02 0.05 % Differential Phase dp at 3.58MHz - 0.03 0.05 deg Input Resistance R IN 80 100 - k Ω Input Capacitance C IN - 2.0 - pF Output Resistance R OUT AV = +1, ƒ = 0 to 10MHz - 8.6 - Ω AV = +1, ƒ = 100MHz - 53 - Ω Clamp Voltage Range V CL -5.5 - +5.5 V Clamp Accuracy V IN = 1V p-p - 7 28 mV PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ELECTRICAL CHARACTERISTICS VS = ± 10 V, T A = 0 - 70 °C, RL = 10k Ω , CL = 150 pF, C COMP = 0 pF unless otherwise shown. POWER SUPPLIES SIGNAL PATH GB4550 SIGNAL PATH GB4550A SIGNAL PATH SIGNAL PATH CLAMP CAUTION ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION 1.8

coarse DC restoration coupled with flat frequency response. buffering and DC restoration of video signals. Figure 4. For smaller loads, an external capacitor can be level. This is the desired clamp action. for the corrective level shift. accuracy to within ± 7 mV is achievable. some distortion of the signal "tip" is unavoidable. All resistors in ohms, all capacitors in microfarads unless otherwise stated.

D.U.T. CCOMP RCOMP SIGNAL IN FROM NETWORK ANALYSER 10n OUTPUT TO NETWORK ANALYSER NON-POLAR 0.1 0.1 +10V -10V CLOAD *22 +5V -5V 0.1 0.1 10k CLC110 0.1 NOTES : This circuit can be used for Frequency Response, Delay and Differential Gain and Phase measurements. * This input capacitor must be shorted out when performing Differential Gain and Phase tests. R COMP and CCOMP are only used on GB4550. 5 3 GB4550 GB4550A GX4314 XPOINT GX4314 XPOINT GX4314 XPOINT GX4314 XPOINT VIDEO IN 10n VIDEO OUT 1 VIDEO OUT 2 VIDEO OUT 3 VIDEO OUT 4 NON-POLAR 0.1 0.1 +10V -10V CLOAD 0.1 to 22 *CCOMP *RCOMP NOTES : In most applications RCOMP and CCOMP will not be needed since the bandwidth depends on the bus capacitance. In general, the maximum occurs when CLOAD is between 82 pF and 100 pF. They are used to control the roll-off for higher load conditions. * Not used on GB4550A. ** The value of this capacitor should be proportional to the input capacitor used. The value shown is for a 22 µF input capacitor. All resistors in ohms, all capacitors in microfarads unless otherwise stated. All resistors in ohms, all capacitors in microfarads unless otherwise stated. Fig. 3 Typical Application Circuit Fig. 2 Test Circuit

This data has been compiled for market investigation purposes only, and does not constitute an offer for sale. ADVANCE INFORMATION NOTE This product is in development phase and specifications are subject to change without notice. Gennum reserves the right to remove the product at any time. Listing the product does not constitute an offer for sale. PRELIMINARY DATA SHEET The product is in a preproduction phase and specifications are subject to change without notice. DATA SHEET The product is in production. Gennum reserves the right to make changes at any time to improve reliability, function or design, in order to provide the best product possible. Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. © Copyright April 1991 Gennum Corporation. All rights reserved. Printed in Canada. 1 40 0.5 0.4 0.3 0.2 0.1 -0.1 -0.2 -0.3 -0.4 -0.5 1 10 40 FREQUENCY (MHz) GAIN (dB ) 150 pF 120 pF 82 pF C L = 180 pF dp dg 123456789012345678901234567890121234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 1 2345678901234567890123456789012 1234567890123 123456789012345678901234567890121234567890123 -10 Fig. 5 GB4550 Phase Delay SpreadFig. 4 GB4550 Frequency Response 2 3 4 5 6 FREQUENCY (MHz) 2 6 C L = 100 pF 0.5 0.3 0.1 -0.1 -0.3 -0.5 1 40 C L = 100 pF C L = 82 pF C L = 180 pF GAIN ( dB ) 1 10 40 FREQUENCY (MHz) -10 2 3 4 5 6 FREQUENCY (MHz) Fig. 6 GB4550A Frequency Response Fig. 7 GB4550A Phase Delay Spread 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 12345 12345 12345 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 12345 12345 12345 12345 12345 12345 1234 1234 1234 1234 1234 1234 1234 123 123 123 1234 1234 1234 1234 1234 1234 1234 123 123 123 1234 1234 1234 1234 1234 1234 123 123 123 1234 1234 1234 1234 1234 1234 1234 1234 1234 123 123 123 1234 1234 1234 2 6 C L = 100pF TYPICAL PERFORMANCE CURVES Unless otherwise shown VS = ± 10V DEGREESDEGREES 1 10 0.05 0.03 0.01 -0.01 -0.03 -0.05 1 3 5 10 FREQUENCY (MHz) Fig. 8 Differential Gain and Phase dg dp V IN = 40 IRE dg (%) / dp (°) REVISION NOTE: Detailed Description added