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ZXFV201
QUAD VIDEO AMPLIFIER
Device Description
The ZXFV201 is a quad, high speed amplifier designed for video and other high speed applications. It features low differential gain and phase performance. Together with high output drive and slew rate capability, this brings high performance to video applications.
Features and Benefits
* Unity gain bandwidth 300MHz * Slew rate 400V/ s * Differential gain 0.01% * Differential phase 0.01 * Output current 40mA * Characterized up to 300pF load * 5 Volt supply * Supply current 7mA per amplifier. * 14 pin SO package
Connection diagram
Applications
* Video gain stages * CCTV buffer * Video distribution * RGB buffering * xDSL * Home theatre * Fast ADC signal input drive * High frequency instrumentation * Cable driving * Radar imaging * Medical imaging
ORDERING INFORMATION
Part Number ZXFV201N14TA ZXFV201N14TC Container reel 7" reel 13" Increment 500 2500
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ZXFV201
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V+ to VInputs to ground* Operating Ambient Temperature Range Operating Junction Temperature TJMAX** 11V differential ( 5.5V) V+ - 0.5V to V- - 0.5V -40C to 85C 150C Storage -65C to 150C
**The thermal resistance from the semiconductor die to ambient is typically 120 C/W when the SO14 package is mounted on a PCB in free air. The power dissipation of the device when loaded must be designed to keep the device junction temperature below TJMAX. *During power-up and power-down, these voltage ratings require an appropriate sequence of applying and removing signals and power supplies. ESD: This device is sensitive to static discharge and proper handling precautions are required.
ELECTRICAL CHARACTERISTICS 5V power supplies, Tamb= 25C unless otherwise stated. Rf = 1k , RL = 150 , CL<= 10pF
PARAMETER Supply Voltage V+ operating range Supply Voltage V- operating range Supply current Input Common mode voltage range Input offset voltage Output offset voltage Input bias current, non-inverting input Input resistance Open loop gain Output voltage swing Output drive current Positive PSRR Negative PSRR Bandwidth -3dB Bandwidth -0.1dB Slew rate Av= +1, Vout = 200mV pk-pk Av= +1, Vout = 200mV pk-pk Av= +1 Av = +2 Av = +10 Vout = Vout = Vout = P P P P P P P P P P P C C C 40 49 51 57 58 300 30 400 400 400 4.0 3.2 4.0 0.01 0.01 1.5 48 CONDITIONS TEST MIN 4.75 -5.25 23 TYP 5 -5 30 3 1 2 5 2 61 3 10 20 10 6.5 MAX 5.25 -4.75 35 UNIT V V mA V mV mV A M dB V mA dB dB MHz MHz V/ s
Rise time Fall time Propagation delay Differential Gain Differential phase
1 V, 10% - 90% C 1 V, 10% - 90% C 2 V, 50% C C C
ns ns ns % deg
3.6MHz(NTSC) and 4.4MHz(PAL), R L = 150 3.6MHz(NTSC) and 4.4MHz(PAL), R L = 150
Test - P = production tested. C = characterised ISSUE 1 - FEBRUARY 2002 2
ZXFV201
Figure 1: Typical Video Signal Application Circuit, Gain = 2 (overall gain = 1 for 75
load)
Figure 2: Pulse Response, Unity Gain, 1V pk-pk, RF = 510
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ZXFV201
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ZXFV201
Figure 3: Graphs of Gain and Phase vs Frequncy (RL=150 ) APPLICATIONS INFORMATION
Introduction A typical circuit application is shown in Figure 1, above. This is suitable for 75 ohm transmission line connections at both the input and the output and is useful for distribution of wide-band signals such as video and xDSL via cables. The 75ohms reverse terminating resistor R4 gives the correct matching condition to a terminated video cable. The amplifier load is then 150 ohms in parallel with the local feedback network. The wide bandwidth of this device necessitates some care in the layout of the printed circuit. A continuous ground plane is required under the device and its signal connection paths, to provide the shortest possible ground return paths for signals and power supply filtering. A double-sided or multi-layer PCB construction is required, with plated-through via holes providing closely spaced low-inductance connections from some components to the continuous ground plane. For the power supply filtering, low inductance surface mount capacitors are normally required. It has been found that very good RF decoupling is provided on each supply using a 1000pF NPO size 0805 or smaller ceramic surface mount capacitor, closest to the device pin, with an adjacent 0.1uF X7R capacitor. Other configurations are possible and it may be found that a single 0.01uF X7R capacitor on each supply gives good results. However this should be supported by larger decoupling capacitors elsewhere on the printed circuit board. Values of 1 to 10 F are recommended, particularly where the voltage regulators are located more than a few inches from the device. These larger capacitors are recommended to be solid tantalum electrolytic or ceramic types. ISSUE 1 - FEBRUARY 2002 5 Note particularly that the inverting input of this current feedback type of amplifier is sensitive to small amounts of capacitance to ground which occur as part of the practical circuit board layout. This capacitance affects bandwidth, frequency response peaking and pulse overshoot. Therefore to minimise this capacitance, the feedback components R2 and R3 of Figure1 should be positioned as close as possible to the inverting input connection. The frequency response and pulse response will vary according to particular values of resistors and layout capacitance. The response can be tailored for the application to some extent by choice of the value of feedback resistor. Figure 2 shows an oscilloscope display of the pulse response for a practical double sided printed circuit board where RF=510ohms.
ZXFV201
PACKAGE OUTLINE PACKAGE DIMENSIONS
INCHES DIM MIN A A1 D H E L e b c 0.053 0.004 0.337 0.228 0.150 0.016 MAX 0.069 0.010 0.344 0.244 0.157 0.050
0.050 BSC 0.013 0.008 0 0.020 0.010 8 0.020
h
0.010
(c) Zetex plc 2001
Zetex plc Fields New Road Chadderton Oldham, OL9 8NP United Kingdom Telephone (44) 161 622 4422 Fax: (44) 161 622 4420 Zetex GmbH Streitfeldstrae 19 D-81673 Munchen Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 Zetex Inc 700 Veterans Memorial Hwy Hauppauge, NY11788 USA Telephone: (631) 360 2222 Fax: (631) 360 8222 Zetex (Asia) Ltd 3701-04 Metroplaza, Tower 1 Hing Fong Road Kwai Fong Hong Kong Telephone: (852) 26100 611 Fax: (852) 24250 494
These offices are supported by agents and distributors in major countries world-wide. This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. For the latest product information, log on to
www.zetex.com
ISSUE 1 - FEBRUARY 2002 6

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