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| www.fairchildsemi.com RC6303 Triple Video Amplifier with Separate Enable Inputs Features * * * * * * * * * * * * * * Triple video amplifier Independently enabled amplifiers 90 MHz -3 dB Bandwidth (AV = 2) 20 MHz 0.1 dB gain flatness Stable at AV 2 0.06% differential gain (AV = 2, RL = 150W) 0.06 differential phase (AV = 2, RL = 150W) High CMRR (100dB), High PSRR (80 dB) Dual 5V power supply Low offset 1.0 mV 16-pin narrow SO package 300 V/ms slew rate Fast settling time: 0.1% in 35 ns TTL or CMOS compatible enable inputs Applications * * * * * * RGB amplifier 3:1 crosspoint switch RGB switch Video instrumentation amplifier Selectable gain amplifier Active filter Description The RC6303 consists of three low power, wide band voltage feedback operational amplifiers. Each channel is capable of delivering a load current of at least 35mA. Each amplifier can be independently enabled or disabled with a TTL or CMOS signal. When disabled, the amplifier is in a high impedance output state, presenting a very high input to output isolation. The amplifiers are optimized for video applications with gain 2 where low differential gain and low phase distortion are significant requirements. The layout is optimized for minimal crosstalk between amplifiers. Block Diagram RC6303 VCC VCCO VEE VEEO OUT1 IN1+ + EN1 IN2- IN2+ - OUT2 + EN2 IN3- IN3+ - OUT3 + EN3 65-3399-01 IN1- - Rev. 1.0.0 RC6303 PRODUCT SPECIFICATION Pin Assignments IN1- IN1+ VCC IN2- IN2+ VEE IN3- IN3+ 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 65-3399-03 Pin Definitions VCCO OUT1 EN1 OUT2 EN2 OUT3 EN3 VEEO Pin Name EN1 EN2 EN3 IN1- IN1+ IN2- IN2+ IN3- IN3+ OUT1 OUT2 OUT3 VCC VCCO VEE VEEO Pin Number 14 12 10 1 2 4 5 7 8 15 13 11 3 16 6 9 Pin Function Description Enables amplifier 1 when low Enables amplifier 2 when low Enables amplifier 3 when low Amplifier 1 inverting input Amplifier 1 non-inverting input Amplifier 2 inverting input Amplifier 2 non-inverting input Amplifier 3 inverting input Amplifier 3 non-inverting input Amplifier 1 output Amplifier 2 output Amplifier 3 output Analog positive supply Positive supply for output stages Analog negative supply Negative supply for output stages Absolute Maximum Ratings (beyond which the device may be damaged)1 Parameter Positive power supply, VCC Negative power supply, VEE Differential input voltage Operating Temperature Storage Temperature Junction Temperature Lead Soldering Temperature (10 seconds) Short circuit tolerance: No more than one output can be shorted to ground. Note: 1. Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if Operating Conditions are not exceeded. Min Typ Max 7 -7 10 Units V V V C C C C 0 -40 +70 +125 150 300 Operating Conditions Parameter VCC VEE qJA Power Supply Voltage Negative Supply Voltage SO16 thermal resistance Min 4.75 -4.75 Typ 5.0 -5.0 105 Max 5.25 -5.25 Units V V C/W 2 PRODUCT SPECIFICATION RC6303 DC Characteristics VCC = 5V, VEE = -5V, AV = 2, RLOAD = 150W, TA = 0C to 70C, unless otherwise specified. Open Loop. Parameter VOS DVOS/DT IB DIB/DT Rin Cin CMIR CMRR PSRR Is Isd ROUT COUT IOUT VOUT AVOL Venh Venl Ien toff ton Iso Input Offset Voltage Offset Voltage Drift Input Bias Current Input Bias Current Drift1 Input Resistance1 Input Capacitance 1 1 Conditions No Load Min Typ 1.0 6.0 1.0 8.0 Max 5 50 5 50 2 Units mV mV/C mA nA/C MW pF V dB dB 1 0.5 2.5 No Load No Load No Load, Whole IC Enabled, At DC Disabled, VO = 2V Disabled 35 No Load RL = 150W 2.5 2.5 58 2.4 0.8 3 200 Settling to 1% @ 5 MHz 160 60 10 3.0 3.0 68 10 70 60 100 80 25 3 0.2 200 0.5 2 33 4 Common Mode Input Range Common Mode Rejection Ratio Power Supply Rejection Ratio Quiescent Supply Current Supply Current Disabled Output Impedance (Closed Loop) 1 Output Capacitance1 Output Current Output Voltage Swing Open-loop Gain Enable High Voltage Enable Low Voltage Enable Input Current Disable Time Enable Time 1 1 mA mA W kW pF mA V V dB V V mA ns ns dB Off Isolation (Input to Output)1 Note: 1. Guaranteed by design. 3 PRODUCT SPECIFICATION RC6303 AC Characteristics VCC = 5V, VEE = -5V, AV = 2, TA = 0 to 70C, RLOAD = 150W, RG = RF = 250W, CL = 10 pF, CF = 3 pF unless otherwise specified. Closed Loop. See Typical Test Circuit. Parameter Frequency Response BW Flat Peak XTALK tr1, tf1 ts OS US SR HD2 HD3 NF SND DG DP -3 dB Bandwidth (AV = 2)1 0.1 dB Bandwidth 1 Conditions VOUT = 0.4 Vpp VOUT = 0.8 Vpp Min Typ 90 Max Units MHz MHz MHz dB dB 70 15 85 20 0.3 Maximum Small Signal AC Peaking1 Crosstalk Isolation1 Rise and Fall Time 10% to 90%1 Settling Time to 0.1 % Overshoot1 Undershoot1 Slew Rate1 1 @ 5 MHz 2V Output Step 2V Output Step 2V Output Step 2V Output Step VOUT = 2.0V VOUT = 0.8 Vpp VOUT = 0.8 Vpp 200 60 6 35 13 4 300 -50 -50 -140 8 Time Domain Response ns ns % % V/ms dB dB dBm nV/OHz % Deg. Distortion 2nd Harmonic Dist. @ 20 MHz1 3nd Harmonic Dist. @ 20 MHz1 Noise Floor > 100 KHz1 Spectral Noise Density1 100 kHz to 200 MHz RL = 150W, VOUT = 1.5V RL = 150W, VOUT = 1.5V Equivalent Input Noise 10 0.06 0.06 Video Performance Diff. Gain (p-p), NTSC & PAL1 Diff. Phase (p-p), NTSC & PAL1 Note: 1. Guaranteed by design. Test Circuit Video Input RG 250W CF 3pF + 1/3 RC6303 - RL 75W 10 pF CL RS 75W Video Output RF 250W RLOAD = RL + RS 65-3399-02 4 PRODUCT SPECIFICATION RC6303 Applications Discussion Each of the three sections of the RC6303 is provided with an Enable input, thus the part is useful for selecting and multiplexing. A three-channel video multiplexer can be built with just one RC6303 and a decoder, as shown in Figure 1. Note that RC6303 enable time is shorter than its disable time, hence a make-before-break action is provided, minimizing switching transients on the signal output. An RGB switch is shown in Figure 2. Circuit Board High-frequency applications require good grounding, power supply decoupling, low parasitic capacitance and inductance, and good isolation between the inputs to minimize their crosstalk. Avoid coupling from output to input to prevent positive feedback. Channel 1 Input - + R Capacitive Load The RC6303 can drive a capacitive load from 10 to over 100 pF. In back terminated video applications, bandwidth will only be limited by the RC time constants of the external output components. A minimum 10 pF capacitive load is required. When driving a 75W cable, place the 75W source termination resistor as close to the amplifier output as possible. Channel 2 Input - + G Output Channel 3 Input - + B Decoder 65-7460 Enable/Disable The enable pins (10, 12, 14), when pulled to a TTL or CMOS logic low or when tied to ground, activate each amplifier individually. When pulled to a TTL or CMOS logic high, the amplifier is tri-stated and presents a high impedance at its output. When disabled the amplifier's power consumption drops, and the non-inverting input signal is isolated from its respective output. Figure 1. Video Busses RGB Channel a Red Input - R + - G + - B + - R + Channel b Red Input DC Accuracy Since the RC6303 is a voltage-feedback amplifier, the inverting and non-inverting inputs have similar impedances and bias currents. To minimize offset voltage, match the source resistances seen by inverting and non-inverting inputs. Channel a Green Input - G + Channel b Green Input Feedback Components Because the RC6303 is a voltage-feedback amplifier, it facilitates using reactive (capacitive and inductive) feedback components for implementing filters, integrators, sample/ hold circuits, etc. The feedback network and the parasitic capacitance at the inverting (summing junction) input create a pole and affect the transfer function of the circuit. For stable operation, minimize the parasitic capacitance and equivalent resistance of the components used in the feedback circuit. Channel a Blue Input Channel Select - B + Channel b Blue Input 74LS04 65-7461 Figure 2. 5 RC6303 PRODUCT SPECIFICATION Notes: 6 RC6303 PRODUCT SPECIFICATION Mechanical DImensions - 16-Lead SOIC Package Symbol A A1 B C D E e H h L N a ccc Inches Min. Max. Millimeters Min. Max. Notes: Notes 1. Dimensioning and tolerancing per ANSI Y14.5M-1982. 2. "D" and "E" do not include mold flash. Mold flash or protrusions shall not exceed .010 inch (0.25mm). 3. "L" is the length of terminal for soldering to a substrate. 4. Terminal numbers are shown for reference only. 5 2 2 5. "C" dimension does not include solder finish thickness. 6. Symbol "N" is the maximum number of terminals. .053 .069 .004 .010 .013 .020 .008 .010 .386 .394 .150 .158 .050 BSC .228 .010 .016 16 0 -- 8 .004 .244 .020 .050 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 9.80 10.00 3.81 4.00 1.27 BSC 5.80 0.25 0.40 16 0 -- 8 0.10 6.20 0.50 1.27 3 6 16 9 E H 1 8 D A1 A SEATING PLANE -C- LEAD COPLANARITY ccc C a h x 45 C e B L 7 RC6303 PRODUCT SPECIFICATION Ordering Information Product Number RC6303M Temperature Range 0 to 70C Screening Commercial Package 16 Pin Narrow SOIC Package Marking RC6303M LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 5/20/98 0.0m 001 Stock#DS30006303 O 1998 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. |
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