LMH6572 www.ti.com SNCS102F - JUNE 2005 - REVISED MAY 2013 LMH6572 Triple 2:1 High Speed Video Multiplexer Check for Samples: LMH6572 * * * * * * * * 23 * * 350 MHz, 250 mV -3 dB Bandwidth 290 MHz, 2 VPP -3 dB Bandwidth 10 ns Channel Switching Time 90 dB Channel to Channel Isolation @ 5 MHz 0.02%, 0.02 Diff. Gain, Phase 0.1 dB Gain Flatness to 140 MHz 1400 V/s Slew Rate Wide Supply Voltage Range: 6V (3V) to 12V (6V) -78 dB HD2 @ 10 MHz -75 dB HD3 @ 10 MHz APPLICATIONS * * * RGB Video Router Multi Input Video Monitor Fault Tolerant Data Switch DESCRIPTION The LMHTM 6572 is a high performance analog multiplexer optimized for professional grade video and other high fidelity, high bandwidth analog applications. The LMH6572 provides a 290MHz bandwidth at 2 VPP output signal levels. The 140 MHz of .1 dB bandwidth and a 1500 V/s slew rate make this part suitable for High Definition Television (HDTV) and High Resolution Multimedia Video applications. The LMH6572 supports composite video applications with its 0.02% and 0.02 differential gain and phase errors for NTSC and PAL video signals while driving a single, back terminated 75 load. The LM6572 can deliver 80 mA linear output current for driving multiple video load applications. The LMH6572 has an internal gain of 2 V/V (+6 dBv) for driving back terminated transmission lines at a net gain of 1 V/V (0 dBv). The LMH6572 is available in the SSOP package. Truth Table Connection Diagram SEL EN OUT 0 0 CH 1 1 0 CH 0 X 1 Disable Figure 1. 16-Pin SSOP Package See Package Number DBQ0016A Top View 1 2 3 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. LMH is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. Copyright (c) 2005-2013, Texas Instruments Incorporated PRODUCT PREVIEW FEATURES 1 LMH6572 SNCS102F - JUNE 2005 - REVISED MAY 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Human Body Model ESD Tolerance (3) 2000V Machine Model 200V Supply Voltage (V+ - V-) 13.2V IOUT (4) 130 mA Input Voltage Range (VS) +150C (3) Maximum Junction Temperature -65C to +150C Storage Temperature Range Soldering Information (1) (2) PRODUCT PREVIEW (3) (4) Infrared or Convection (20 sec) 235C Wave Soldering (10 sec) 260C Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not ensured. For ensured specifications, see the Electrical Characteristics tables. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. Human Body Model, 1.5 k in series with 100 pF. Machine Model 0 In series with 200 pF. The maximum output current (IOUT) is determined by the device power dissipation limitations. See the Power Dissipation section of the Application Section for more details. A short circuit condition should be limited to 5 seconds or less. Operating Ratings (1) Operating Temperature -40 C to 85 C Supply Voltage Range 6V to 12V Thermal Resistance Package (1) 2 16-Pin SSOP (JA) 125C/W (JC) 36C/W Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not ensured. For ensured specifications, see the Electrical Characteristics tables. Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 LMH6572 www.ti.com SNCS102F - JUNE 2005 - REVISED MAY 2013 5V Electrical Characteristics Unless otherwise specified, VS = 5V, RL = 100. Symbol Conditions (1) Parameter Min Typ Max Units Frequency Domain Performance SSBW -3 dB Bandwidth VOUT = 0.25 VPP LSBW -3 dB Bandwidth (2) VOUT = 2 VPP .1 dBBW 0.1 dB Bandwidth DG DP 350 MHz 290 MHz VOUT = 0.25 VPP 140 MHz Differential Gain RL = 150, f = 4.43 MHz 0.02 % Differential Phase RL = 150, f = 4.43MHz 0.02 deg 250 Time Domain Response TRS Channel to Channel Switching Time Logic Transition to 90% Output 10 ns Enable and Disable Times Logic Transition to 90% or 10% Output 11 ns TRL Rise and Fall Time 2V Step 1.5 ns TSS Settling Time to 0.05% 2V Step 17 ns OS Overshoot 4V Step 5 % SR Slew Rate (2) 4V Step 1400 V/s HD2 2nd Harmonic Distortion 2 VPP , 10 MHz -78 dBc HD3 3rd Harmonic Distortion 2 VPP , 10 MHz -75 dBc IMD 3rd Order Intermodulation Products 10 MHz, Two tones 2 VPP at Output -80 dBc 1200 PRODUCT PREVIEW Distortion Equivalent Input Noise VN Voltage >1 MHz, Input Referred 5 nVHz ICN Current >1 MHz, Input Referred 5 pA/Hz Static, DC Performance GAIN Voltage Gain 2.0 Gain Error (3) No load, with respect to nominal gain of 2.00 V/V. 0.3 Gain Error RL = 50, with respect to nominal gain of 2.00 V/V 0.3 VIO Output Offset Voltage (3) VIN = 0V 1 DVIO Average Drift IBN Input Bias Current (3) VIN = 0V -1.4 DIBN V/V 0.5 0.7 % 14 17.5 27 (4) Average Drift % mV V/C 5.0 5.6 7 A nA/C PSRR Power Supply Rejection Ratio (3) DC, Input referred 50 48 54 ICC Supply Current (3) No load 20 23 25 28.5 mA 2.0 2.2 2.3 mA Supply Current Disabled (3) No load VIH Logic High Threshold (3) Select & Enable Pins VIL Logic Low Threshold (3) Select & Enable Pins IiL Logic Pin Input Current Low (4) Logic Input = 0V IiH Logic Pin Input Current High (4) Logic Input = 2.0V (1) (2) (3) (4) dB 2.0 112 100 V 0.8 V -1 5.0 15 A 150 200 210 A Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of the device such that TJ = TA. No specification of parametric performance is indicated in the electrical tables under conditions of internal self heating where TJ > TA. See Applications Section for information on temperature de-rating of this device. Min/Max ratings are based on product testing, characterization and simulation. Individual parameters are tested as noted. Parameters ensured by design. Parameters ensured by electrical testing at 25 C. Positive Value is current into device. Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 3 LMH6572 SNCS102F - JUNE 2005 - REVISED MAY 2013 www.ti.com 5V Electrical Characteristics (continued) Unless otherwise specified, VS = 5V, RL = 100. Symbol Conditions (1) Parameter Min Typ Max Units 650 620 800 940 1010 1.3 1.6 1.88 Miscellaneous Performance RF Internal Feedback and Gain Set Resistor Values RODIS Disabled Output Resistance RIN+ Input Resistance 100 k CIN Input Capacitance 0.9 pF ROUT Output Resistance 0.26 VO Output Voltage Range VOL Internal Feedback and Gain Set Resistors in Series to Ground No Load 3.83 3.80 3.9 RL = 100 3.52 3.5 3.53 2 2.5 +70 40 80 k V V PRODUCT PREVIEW CMIR Input Voltage Range IO Linear Output Current (3) (4) VIN = 0V ISC Short Circuit Current (5) VIN = 2V, Output Shorted to Ground 230 mA XTLK Channel to Channel Crosstalk VIN = 2 VPP @5 MHz -90 dBc XTLK Channel to Channel Crosstalk VIN = 2 VPP @ 100 MHz -54 dBc XTLK All Hostile Crosstalk In A, C. Out B, VIN = 2 VPP @ 5 MHz -95 dBc (5) 4 V mA The maximum output current (IOUT) is determined by the device power dissipation limitations. See the Power Dissipation section of the Application Section for more details. A short circuit condition should be limited to 5 seconds or less. Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 LMH6572 www.ti.com SNCS102F - JUNE 2005 - REVISED MAY 2013 3.3V Electrical Characteristics Unless otherwise specified, VS = 3.3V, RL = 100. Symbol Conditions (1) Parameter Min Typ Max Units Frequency Domain Performance SSBW -3 dB Bandwidth VOUT = 0.25 VPP 360 MHz LSBW -3 dB Bandwidth VOUT = 2.0 VPP 270 MHz 0.1 dBBW 0.1 dB Bandwidth VOUT = 0.5 VPP 80 MHz GFP Peaking DC to 200 MHz 0.3 dB DG Differential Gain RL = 150, f=4.43 MHz 0.02 % DP Differential Phase RL = 150, f=4.43 MHz 0.03 deg Time Domain Response TRL Rise and Fall Time 2V Step 2.0 ns TSS Settling Time to 0.05% 2V Step 15 ns OS Overshoot 2V Step 5 % SR Slew Rate 2V Step 1000 V/s 2nd Harmonic Distortion 2 VPP, 10 MHz -70 dBc HD2 rd HD3 3 Harmonic Distortion 2 VPP, 10 MHz -74 dBc IMD 3rd Order Intermodulation Products 10 MHz, Two tones 2 VPP at Output -79 dBc 2.0 V/V PRODUCT PREVIEW Distortion Static, DC Performance GAIN Voltage Gain VIO Output Offset Voltage DVIO Average Drift Input Bias Current (2) IBN DIBN VIN = 0V VIN = 0V Average Drift 1 mV 36 V/C 2 A 24 nA/C PSRR Power Supply Rejection Ratio DC, Input Referred 54 dB ICC Supply Current RL = 20 mA VIH Logic High Threshold Select & Enable Pins VIL Logic Low Threshold Select & Enable Pins 1.3 0.4 V V Miscellaneous Performance RIN+ Input Resistance 100 k CIN Input Capacitance 0.9 pF ROUT Output Resistance 0.27 VO Output Voltage Range No Load 2.5 V RL = 100 2.2 V VOL CMIR Input Voltage Range IO Linear Output Current ISC XTLK (1) (2) 1.2 V VIN = 0V 60 mA Short Circuit Current VIN = 1V, Output Shorted to Ground 150 mA Channel to Channel Crosstalk 5 MHz -90 dBc Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of the device such that TJ = TA. No specification of parametric performance is indicated in the electrical tables under conditions of internal self heating where TJ > TA. See Applications Section for information on temperature de-rating of this device. Min/Max ratings are based on product testing, characterization and simulation. Individual parameters are tested as noted. Positive Value is current into device. Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 5 LMH6572 SNCS102F - JUNE 2005 - REVISED MAY 2013 www.ti.com Typical Performance Characteristics Unless otherwise specified, VS = 5V, RL = 100. PRODUCT PREVIEW 6 Frequency Response vs. VOUT Frequency Response vs. VOUT Figure 2. Figure 3. Frequency Response vs. Capacitive Load Suggested RS vs. Capacitative Load Load = 1k || CL Figure 4. Figure 5. Harmonic Distortion vs. Output Voltage Harmonic Distortion vs. Output Voltage Figure 6. Figure 7. Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 LMH6572 www.ti.com SNCS102F - JUNE 2005 - REVISED MAY 2013 Typical Performance Characteristics (continued) Harmonic Distortion vs. Frequency Harmonic Distortion vs. Frequency Figure 8. Figure 9. Harmonic Distortion vs. Supply Voltage Channel Switching Time Figure 10. Figure 11. Disable Time Pulse Response Figure 12. Figure 13. Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 PRODUCT PREVIEW Unless otherwise specified, VS = 5V, RL = 100. 7 LMH6572 SNCS102F - JUNE 2005 - REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, VS = 5V, RL = 100. PRODUCT PREVIEW Crosstalk PSRR Figure . Figure 14. PSRR Closed Loop Output Impedance Figure 15. Figure 16. Closed Loop Output Impedance Figure 17. 8 Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 LMH6572 www.ti.com SNCS102F - JUNE 2005 - REVISED MAY 2013 APPLICATION NOTES General Information The LMH6572 is a high-speed triple 2:1 analog multiplexer, optimized for very high speed and low distortion. With a fixed gain of 2 and excellent AC performance, the LMH6572 is ideally suited for switching high resolution, presentation grade video signals. The LMH6572 has no internal ground reference. Single or split supply configurations are both possible. The LMH6572 features very high speed channel switching and disable times. When disabled the LMH6572 output is high impedance, making multiplexer expansion possible by combining multiple devices. Single Supply Operation Figure 18. Typical Application PRODUCT PREVIEW The LMH6572 uses mid-supply referenced circuits for the select and disable pins. In order to use the LMH6572 in single supply configuration, it is necessary to use a circuit similar to Figure 19. In this configuration the logical inputs are compatible with high breakdown open collector TTL, or open drain CMOS logic. In addition, the default logic state is reversed since there is a pull-up resistor on those pins. Single supply operation also requires the input to be biased to within the common mode input range of roughly 2V from the mid-supply point. Figure 19. Single Supply Application Video Performance The LMH6572 has been designed to provide excellent performance with production quality video signals in a wide variety of formats such as HDTV and High Resolution VGA. Best performance will be obtained with backterminated loads. The back termination reduces reflections from the transmission line and effectively masks transmission line and other parasitic capacitances from the amplifier output stage. Figure 18 shows a typical configuration for driving a 75 cable. The output buffer is configured for a gain of 2, so using back terminated loads will give a net gain of 1. Gain Accuracy The gain accuracy of the LMH6572 is accurate to 0.5% (0.3% typical) and stable over temperature. The internal gain setting resistors, RF and RG, match very well; however, over process and temperature their absolute value will change. Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 9 LMH6572 SNCS102F - JUNE 2005 - REVISED MAY 2013 www.ti.com Expanding the Multiplexer It is possible to build higher density multiplexers by paralleling several LMH6572s. Figure 20 shows a 4:1 RGB MUX using two LMH6572s: PRODUCT PREVIEW Figure 20. RGB MUX Using Two LMH6572's If it is important in the end application to make sure that no two inputs are presented to the output at the same time, an optional delay block can be added prior to the ENABLE(EN) pin of each device, as shown. Figure 21 shows one possible approach to this delay circuit. The delay circuit shown will delay ENABLE's H to L transitions (R1 and C1 decay) but will not delay its L to H transition. Figure 21. Delay Circuit Implementation R2 should be kept small compared to R1 in order to not reduce the ENABLE voltage and to produce little or no delay to the ENABLE L to H transition. With the ENABLE pin putting the output stage into a high impedance state, several LMH6572's can be tied together to form a larger input MUX. However, there is a slight loading effect on the active output caused by the off-channel feedback and gain set resistors, as shown in Figure 21. Figure 22 is assuming there are four LMH6572 devices tied together to form a triple 8:1 MUX. With the internal resistors valued at approximately 800, the gain error is about -0.57 dB, or about -6%. 10 Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 LMH6572 www.ti.com SNCS102F - JUNE 2005 - REVISED MAY 2013 Figure 22. Multiplexer Input Expansion by Combining Outputs An alternate approach would be to tie the outputs directly together and let all devices share a common back termination resistor in order to alleviate the gain error issue above. Other Applications The LMH6572 may be utilized in systems that involve a single RGB channel as well whenever there is a need to switch between different "flavors" of a single RGB input. Here are some examples: 1. RGB positive polarity, negative polarity switch 2. RGB full resolution, high-pass filter switch In each of these applications, the same RGB input occupies one set of inputs to the LMH6572 and the other "flavor" would be tied to the other input set. Driving Capacitive Loads Capacitive output loading applications will benefit from the use of a series output resistor. Figure 23 shows the use of a series output resistor, ROUT, to stabilize the amplifier output under capacitive loading. Capacitive loads of 5 to 120 pF are the most critical, causing ringing, frequency response peaking and possible oscillation. Figure 24 gives a recommended value for selecting a series output resistor for mitigating capacitive loads. The values suggested in the charts are selected for .5 dB or less of peaking in the frequency response. This gives a good compromise between settling time and bandwidth. For applications where maximum frequency response is needed and some peaking is tolerable, the value of ROUT can be reduced slightly from the recommended values. Figure 23. Decoupling Capacitive Loads Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 11 PRODUCT PREVIEW The drawback in this case is the increased capacitive load presented to the output of each LMH6572 due to the offstate capacitance of the LMH6572. LMH6572 SNCS102F - JUNE 2005 - REVISED MAY 2013 www.ti.com Figure 24. Recommended ROUT vs. Capacitive Load Figure 25. Frequency Response vs. Capacitive Load Layout Considerations PRODUCT PREVIEW Whenever questions about layout arise, use the LMH730151 evaluation board as a guide. To reduce parasitic capacitances, ground and power planes should be removed near the input and output pins. For long signal paths controlled impedance lines should be used, along with impedance matching elements at both ends. Bypass capacitors should be placed as close to the device as possible. Bypass capacitors from each rail to ground are applied in pairs. The larger electrolytic bypass capacitors can be located farther from the device; however, the smaller ceramic capacitors should be placed as close to the device as possible. In Figure 18 and Figure 19, the capacitor between V+ and V- is optional, but is recommended for best second harmonic distortion. Another way to enhance performance is to use pairs of .01 F and 0.1 F ceramic capacitors for each supply bypass. Power Dissipation The LMH6572 is optimized for maximum speed and performance in the small form factor of the standard SSOP package. To achieve its high level of performance, the LMH6572 consumes 23 mA of quiescent current, which cannot be neglected when considering the total package power dissipation limit. To ensure maximum output drive and highest performance, thermal shutdown is not provided. Therefore, it is of utmost importance to make sure that the TJMAX is never exceeded due to the overall power dissipation. 12 Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 LMH6572 www.ti.com SNCS102F - JUNE 2005 - REVISED MAY 2013 Follow these steps to determine the Maximum power dissipation for the LMH6572: 1. Calculate the quiescent (no-load) power: PAMP = ICC* (VS) where * VS = V+ - V- (1) 2. Calculate the RMS power dissipated in the output stage: PD (rms) = rms ((VS - VOUT) * IOUT) where * * VOUT and IOUT are the voltage across and the current through the external load VS is the total supply voltage (2) 3. Calculate the total RMS power: PT = PAMP + PD (3) The maximum power that the LMH6572 package can dissipate at a given temperature can be derived with the following equation: PMAX = (150 - TAMB)/ JA * * * TAMB = Ambient temperature (C) JA = Thermal resistance, from junction to ambient, for a given package (C/W) For the SSOP package JA is 125 C/W (4) ESD Protection The LMH6572 is protected against electrostatic discharge (ESD) on all pins. The LMH6572 will survive 2000V Human Body model and 200V Machine model events. Under normal operation the ESD diodes have no effect on circuit performance. There are occasions, however, when the ESD diodes will be evident. If the LMH6572 is driven by a large signal while the device is powered down the ESD diodes will conduct. The current that flows through the ESD diodes will either exit the chip through the supply pins or will flow through the device, hence it is possible to power up a chip with a large signal applied to the input pins. Shorting the power pins to each other will prevent the chip from being powered up through the input. Evaluation Boards Texas Instruments provides the following evaluation boards as a guide for high frequency layout and as an aid in device testing and characterization. Many of the datasheet plots were measured with these boards. Device Package Evaluation Board Part Number LMH6572 SSOP LMH730151 An evaluation board can be shipped when a device sample request is placed with Texas Instruments. Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 13 PRODUCT PREVIEW where LMH6572 SNCS102F - JUNE 2005 - REVISED MAY 2013 www.ti.com REVISION HISTORY Changes from Revision E (April 2013) to Revision F * Page Changed layout of National Data Sheet to TI format .......................................................................................................... 13 PRODUCT PREVIEW 14 Submit Documentation Feedback Copyright (c) 2005-2013, Texas Instruments Incorporated Product Folder Links: LMH6572 PACKAGE OPTION ADDENDUM www.ti.com 24-Oct-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (C) Device Marking (4/5) LMH6572MQ/NOPB ACTIVE SSOP DBQ 16 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LH65 72MQ LMH6572MQX/NOPB ACTIVE SSOP DBQ 16 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 LH65 72MQ (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. 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