EL2090 Intersil Corporation, EL2090 Datasheet

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EL2090

Manufacturer Part Number
EL2090
Description
Manufacturer
Intersil Corporation
Datasheet

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100MHz DC-Restored Video Amplifier
quality video amplifier and a nulling sample-and-hold
amplifier specifically designed to stabilize video
performance. When the HOLD logic input is set to a logic 0
during a horizontal sync, the sample-and-hold amplifier may
be used as a general-purpose op-amp to null the DC offset
of the video amplifier. When the HOLD input goes to a logic
1 the sample-and-hold stores the correction voltage on the
hold capacitor to maintain DC correction during the
subsequent scan line.
The video amplifier is optimized for video characteristics,
and performance at NTSC is nearly perfect. It is a current-
feedback amplifier, so that -3dB bandwidth changes little at
various closed-loop gains. The amplifier easily drives video
signal levels into 75Ω loads. With 100MHz bandwidth, the
EL2090 is also useful in HDTV applications.
The sample-and-hold is optimized for fast sync pulse
response. The application circuit shown will restore the video
DC level in five scan lines, even if the HOLD pulse is only
2µs long. The output impedance of the sample-and-hold is
low and constant over frequency and load current so that the
performance of the video amplifier is not compromised by
connections to the DC restore circuitry.
The EL2090 is fabricated in Elantec's proprietary
Complementary Bipolar process which produces NPN and
PNP transistors with equivalent AC and DC performance.
The EL2090 is specified for operation over the 0°C to 75°C
temperature range.
Pinouts
The EL2090 is the first complete DC-
restored monolithic video amplifier
sub-system. It contains a very high-
®
(14-PIN DIP)
TOP VIEW
EL2090
1
Data Sheet
Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Complete video level restoration system
• 0.01% differential gain and 0.02° differential phase
• 100MHz bandwidth
• 0.1dB flatness to 20MHz
• Sample-and-hold has 15nA typical leakage and 1.5pC
• System can acquire DC correction level in 10µs, or 5 scan
• V
• TTL/CMOS hold signal
Applications
• Input amplifier in video equipment
• Restoration amplifier in video mixers
Ordering Information
August 1995, Rev. A
EL2090CN
EL2090CM
accuracy at NTSC
charge injection
lines of 2µs each, to 1/2 IRE
NUMBER
S
PART
= ±5V to ±15V
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
0°C to +75°C
0°C to +75°C
RANGE
TEMP.
(16-PIN SOL)
TOP VIEW
EL2090
14-Pin PDIP
16-Pin SOL
PACKAGE
EL2090
PKG. NO.
MDP0031
MDP0027
FN7040

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EL2090 Summary of contents

Page 1

... DC restore circuitry. The EL2090 is fabricated in Elantec's proprietary Complementary Bipolar process which produces NPN and PNP transistors with equivalent AC and DC performance. The EL2090 is specified for operation over the 0°C to 75°C temperature range. Pinouts EL2090 (14-PIN DIP) ...

Page 2

... Charge Current Available to Chold CHARGE V Output Swing Short-Circuit Current SC 2 EL2090 Current into V Current S/H Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . See Curves , Operating Ambient Temperature Range . . . . . . . . . . . . 0°C to 75°C Operating Junction Temperature Plastic DIP or SOL 150°C Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150° ...

Page 3

... Sample to Hold Charge Injection (Note 1) T Sample to Hold or Hold to Sample Delay Time T Sample to Hold Settling Time to 2mV s NOTE: 1. The logic input is between 0V and 5V, with a 220Ω resistor in series with the HOLD pin and 39pF capacitor from HOLD pin to ground. 3 EL2090 V = ±15V 15pF STRAY C = 100pF 25° ...

Page 4

... Typical Performance Curves Relative Frequency Response for Various Gains Frequency Response Flatness for Various Load and Supply Conditions 4 EL2090 FIGURE 1. TYPICAL APPLICATION (A V Frequency Response with Different Loads (A Frequency Response Flatness IN- = + ...

Page 5

... Differential Gain and Phase vs Supply Voltage 150Ω Differential Gain vs DC Input Offset 3.58MHz Differential Gain vs DC Input Offset and EL2090 (Continued) = +2, V from +2, = 150Ω 30MHz 150Ω Deviation from Linear Phase vs Frequency Differential Phase vs DC Input Offset ...

Page 6

... Typical Performance Curves Sample-to-Hold Change Injection vs Temperature Supply Current vs Supply Voltage 6 EL2090 (Continued) S/H Available Charge Current vs Temperature Maximum Power Dissipation vs Ambient Temperature— 14-Pin PDIP and 16-Pin SOL Typical Droop Current vs Temperature ±15V S Supply Current vs Temperature ±15V S ...

Page 7

... Applications Information The EL2090 is a general purpose component and thus the video amplifier and sample-and-hold pins are uncommitted. Therefore much of the ultimate performance as a DC- restored video amplifier will be set by external component values and parasitics. Some application considerations will be offered here. The DC feedback from the sample-and-hold can be applied ...

Page 8

... Rf. As demonstrated by the frequency response versus gain graph, the peaking and bandwidth is a weak function of gain. The EL2090 was designed for Rf = 300Ω giving optimum gain flatness +2. Unity- gain response is flattest for Rf = 360Ω; gains of +5 can use Rf = 270Ω ...

Page 9

... EL2090/ ******** Video Amplifier ******************* * 1.0 vis vxx 1.0 r10 20nH iinp 3 0 10µA iinm 1 0 5µ vis 600 dclamp dclamp 0.00166666666 0.7µ ...

Page 10

... EL2090 Macromodel (Continued) v42 0 51 {vclamp} g41 200e-6 r42 44 0 31Meg d45 9 14 diode d46 12 9 diode swa e40 0.95 i40 0 9 10nA r45 l40 47 11 70nH c40 7 9 0.32pF r47 7 48 10K c41 48 0 3pF ...

Page 11

... EL2090 Macromodel (Continued) All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...

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