www.fairchildsemi.com RC6303 Triple Video Amplifier with Separate Enable Inputs Features Applications • • • • • • • • • • • • • • • • • • • • Triple video amplifier Independently enabled amplifiers 90 MHz -3 dB Bandwidth (AV = 2) 20 MHz ±0.1 dB gain flatness Stable at AV ³ 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 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. RGB amplifier 3:1 crosspoint switch RGB switch Video instrumentation amplifier Selectable gain amplifier Active filter Block Diagram VCC VCCO VEE VEEO RC6303 IN1– – IN1+ + OUT1 EN1 The amplifiers are optimized for video applications with gain ³ 2 where low differential gain and low phase distortion are significant requirements. IN2– – IN2+ + OUT2 The layout is optimized for minimal crosstalk between amplifiers. EN2 IN3– – IN3+ + OUT3 EN3 65-3399-01 Rev. 1.0.0 RC6303 PRODUCT SPECIFICATION Pin Assignments Pin Definitions IN1– 1 16 VCCO Pin Name IN1+ 2 15 OUT1 EN1 14 Enables amplifier 1 when low VCC 3 14 EN1 EN2 12 Enables amplifier 2 when low 10 Enables amplifier 3 when low 4 13 OUT2 EN3 IN2– IN1– 1 Amplifier 1 inverting input IN2+ 5 12 EN2 IN1+ 2 Amplifier 1 non-inverting input VEE 6 11 OUT3 IN2– 4 Amplifier 2 inverting input IN3– 7 10 EN3 IN2+ 5 Amplifier 2 non-inverting input IN3+ 8 9 VEEO IN3– 7 Amplifier 3 inverting input IN3+ 8 Amplifier 3 non-inverting input OUT1 15 Amplifier 1 output OUT2 13 Amplifier 2 output OUT3 11 Amplifier 3 output VCC 3 Analog positive supply VCCO 16 Positive supply for output stages VEE 6 Analog negative supply VEEO 9 Negative supply for output stages 65-3399-03 Pin Number Pin Function Description Absolute Maximum Ratings (beyond which the device may be damaged)1 Parameter Max Units Positive power supply, VCC 7 V Negative power supply, VEE -7 V Differential input voltage 10 V 0 +70 °C -40 Operating Temperature Min Typ +125 °C Junction Temperature 150 °C Lead Soldering Temperature (10 seconds) 300 °C Storage Temperature 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. Operating Conditions Parameter 2 Min Typ Max Units VCC Power Supply Voltage 4.75 5.0 5.25 V VEE Negative Supply Voltage -4.75 -5.0 -5.25 V qJA SO16 thermal resistance 105 °C/W PRODUCT SPECIFICATION RC6303 DC Characteristics VCC = 5V, VEE = -5V, AV = 2, RLOAD = 150W, TA = 0°C to 70°C, unless otherwise specified. Open Loop. Parameter VOS Conditions Input Offset Voltage Min No Load 1 Typ Max Units 1.0 ±5 mV ±50 mV/°C DVOS/DT Offset Voltage Drift 6.0 IB Input Bias Current ±1.0 ±5 mA DIB/DT Input Bias Current Drift1 ±8.0 ±50 nA/°C Rin Input Resistance1 MW 1 1 0.5 2 pF Cin Input Capacitance CMIR Common Mode Input Range CMRR Common Mode Rejection Ratio No Load 70 100 dB PSRR Power Supply Rejection Ratio No Load 60 80 dB Is Quiescent Supply Current No Load, Whole IC Isd Supply Current Disabled ROUT Output Impedance (Closed Loop) 1 Enabled, At DC COUT Output Capacitance1 Disabled IOUT Output Current VOUT Output Voltage Swing ±2.5 Disabled, VO = ±2V 10 kW 200 2 pF mA RL = 150W ±2.5 ±3.0 V 68 dB Enable Low Voltage Ien Enable Input Current Off Isolation (Input to Output)1 W V Venl Enable Time mA ±3.0 58 Iso 4 ±2.5 2.4 ton 3 No Load Open-loop Gain 1 mA 35 Enable High Voltage Disable Time 33 0.5 AVOL toff 25 0.2 Venh 1 V V 3 200 0.8 V 10 mA ns Settling to 1% 160 ns @ 5 MHz 60 dB Note: 1. Guaranteed by design. 3 PRODUCT SPECIFICATION RC6303 AC Characteristics VCC = 5V, VEE = -5V, AV = 2, TA = 0 to 70°C, RLOAD = 150W, RG = RF = 250W, CL = 10 pF, CF = 3 pF unless otherwise specified. Closed Loop. See Typical Test Circuit. Parameter Conditions Min Typ Max Units Frequency Response BW -3 dB Bandwidth (AV = 2)1 VOUT = 0.4 Vpp VOUT = 0.8 Vpp 70 1 Flat ±0.1 dB Bandwidth Peak Maximum Small Signal AC Peaking1 XTALK Crosstalk Isolation1 15 90 MHz 85 MHz 20 MHz 0.3 dB @ 5 MHz 60 dB 2V Output Step 6 Time Domain Response tr1, tf1 Rise and Fall Time 10% to 90%1 1 8 ns ts Settling Time to 0.1 % 2V Output Step 35 ns OS Overshoot1 2V Output Step 13 % US Undershoot1 2V Output Step 4 % 300 V/ms SR Slew Rate1 VOUT = ±2.0V 200 Distortion HD2 2nd Harmonic Dist. @ 20 MHz1 VOUT = 0.8 Vpp -50 dB HD3 3nd Harmonic Dist. @ 20 MHz1 VOUT = 0.8 Vpp -50 dB -140 dBm 10 nV/ÖHz RL = 150W, VOUT = ±1.5V 0.06 % RL = 150W, VOUT = ±1.5V 0.06 Deg. Equivalent Input Noise NF SND Noise Floor > 100 KHz1 Spectral Noise Density1 100 kHz to 200 MHz Video Performance DG DP Diff. Gain (p-p), NTSC & PAL1 Diff. Phase (p-p), NTSC & PAL1 Note: 1. Guaranteed by design. Test Circuit Video Input RG + 1/3 RC6303 RS 75W Video Output – 250W CF 3pF RF 250W RL 75W 10 pF CL RLOAD = RL + RS 65-3399-02 4 PRODUCT SPECIFICATION RC6303 Applications Discussion Circuit Board 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. 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. 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. – Channel 1 Input + R An RGB switch is shown in Figure 2. 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 Capacitive Load + G Output – Channel 3 Input + B Decoder 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. 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. 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. 65-7460 Figure 1. Video Busses R G B Channel a Red Input Channel Select – R + – G + Channel a Green Input Channel a Blue Input – R + Channel b Red Input – G + – B + Channel b Green Input – B + 74LS04 Channel b Blue Input 65-7461 Figure 2. 5 RC6303 Notes: 6 PRODUCT SPECIFICATION RC6303 PRODUCT SPECIFICATION Mechanical DImensions – 16-Lead SOIC Package Inches Symbol Min. A A1 B C D E e H h L N a ccc Millimeters Max. Min. 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 .228 .010 .016 5.80 0.25 0.40 16 6.20 0.50 1.27 16 0¡ 8¡ 0¡ 8¡ — .004 — 0.10 16 1. Dimensioning and tolerancing per ANSI Y14.5M-1982. Max. .053 .069 .004 .010 .013 .020 .008 .010 .386 .394 .150 .158 .050 BSC .244 .020 .050 Notes: Notes 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. 3 6 9 E 1 H 8 h x 45¡ D C A1 A e B SEATING PLANE –C– LEAD COPLANARITY ccc C 7 a L RC6303 PRODUCT SPECIFICATION Ordering Information Product Number RC6303M Temperature Range Screening Package Package Marking 0° to 70°C Commercial 16 Pin Narrow SOIC 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. 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. www.fairchildsemi.com 5/20/98 0.0m 001 Stock#DS30006303 Ó 1998 Fairchild Semiconductor Corporation