LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option General Description Features The LMH™6645 (single) and LMH6646 (dual), rail-to-rail (VS = 2.7V, TA = 25˚C, RL = 1kΩ to V+/2, AV = +1. Typical values unless specified). n −3dB BW 55MHz n Supply voltage range 2.5V to 12V n Slew rate 22V/µs n Supply current 650µA/channel n Output short circuit current 42mA ± 20mA n Linear output current n Input common mode voltage 0.3V beyond rails n Output voltage swing 20mV from rails n Input voltage noise 17nV/ n Input current noise 0.75pA/ input and output voltage feedback amplifiers, offer high speed (55MHz), and low voltage operation (2.7V) in addition to micro-power shutdown capability (LMH6647, single). Input common mode voltage range exceeds either supply by 0.3V, enhancing ease of use in multitude of applications where previously only inferior devices could be used. Output voltage range extends to within 20mV of either supply rails, allowing wide dynamic range especially in low voltage applications. Even with low supply current of 650µA/amplifier, output current capability is kept at a respectable ± 20mA for driving heavier loads. Important device parameters such as BW, Slew Rate and output current are kept relatively independent of the operating supply voltage by a combination of process enhancements and design architecture. In portable applications, the LMH6647 provides shutdown capability while keeping the turn-off current to less than 50µA. Both turn-on and turn-off characteristics are well behaved with minimal output fluctuations during transitions. This allows the part to be used in power saving mode, as well as multiplexing applications. Miniature packages (SOT23, MSOP-8, and SO-8) are further means to ease the adoption of these low power high speed devices in applications where board area is at a premium. Applications n n n n n Active filters High speed portable devices Multiplexing applications (LMH6647) Current sense buffer High speed transducer amp Connection Diagrams SOT23-5 (LMH6645) SOT23-6 (LMH6647) SOIC-8 (LMH6645) 20020260 20020259 Top View Top View 20020261 Top View LMH™ is a trademark of National Semiconductor Corporation. © 2005 National Semiconductor Corporation DS200202 www.national.com LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option June 2005 LMH6645/46/47 SOIC-8 and MSOP-8 (LMH6646) SOIC-8 (LMH6647) 20020263 20020262 Top View Top View Ordering Information Package Part Number Package Marking Transport Media NSC Drawing 5-Pin SOT-23 LMH6645MF A68A 1k Units Tape and Reel MF05A LMH6645MFX 6-Pin SOT-23 LMH6647MF 3k Units Tape and Reel A69A 1k Units Tape and Reel LMH6647MFX SOIC-8 LMH6645MA LMH6645MA LMH6645MAX LMH6646MA LMH6646MM LMH6647MA 95 Units Rails 95 Units Rails 2.5k Units Tape and Reel A70A 1k Units Tape and Reel LMH6646MMX www.national.com M08A 2.5k Units Tape and Reel LMH6647MAX MSOP-8 95 Units Rails 2.5k Units Tape and Reel LMH6646MA LMH6646MAX LMH6647MA MF06A 3k Units Tape and Reel 3.5k Units Tape and Reel 2 MUA08A Soldering Information If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance Human Body Storage Temperature Range −40˚C to +85˚C Package Thermal Resistance (Note 4) (θJA) (Note 3, 11) 12.6V SOT23-5 V+ +0.8V, V− −0.8V SOT23-6 265˚C/W SOIC-8 190˚C/W MSOP-8 235˚C/W Supply Voltage (V+ - V−) Voltage at Input/Output pins 2.5V to 12V Temperature Range (Note 4) ± 2.5V Output Short Circuit Duration 260˚C Supply Voltage (V+ – V−) 200V (Note 9) VIN Differential 235˚C Wave Soldering (10 sec) Operating Ratings (Note 1) 2KV (Note 2) Machine Model Infrared or Convection (20 sec) −65˚C to +150˚C Junction Temperature (Note 4) +150˚C 265˚C/W 2.7V Electrical Characteristics Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 2.7V, V− = 0V, VCM = VO = V+/2, and Rf = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) 40 55 BW −3dB BW AV = +1, VOUT = 200mVPP, VCM = 0.7V en Input-Referred Voltage Noise f = 100kHz 17 f = 1kHz 25 in Input-Referred Current Noise f = 100kHz 0.75 f = 1kHz 1.20 CT Rej. Cross-Talk Rejection (LMH6646 only) f = 5MHz, Receiver: Rf = Rg = 510Ω, AV = +2 SR Slew Rate AV = −1, VO = 2VPP (Note 8, 13) TON Max (Note 6) Units MHz nV/ pA/ 47 dB 22 V/µs Turn-On Time (LMH6647 only) 250 ns TOFF Turn-Off Time (LMH6647 only) 560 ns THSD Shutdown Threshold (LMH6647 only) IS ≤ 50µA 1.95 ISD Shutdown Pin Input Current (LMH6647 only) (Note 7) −20 VOS Input Offset Voltage 0V ≤ VCM ≤ 2.7V TC VOS Input Offset Average Drift (Note 12) IB Input Bias Current VCM = 2.5V (Note 7) 0.40 2 2.2 VCM = 0.5V (Note 7) −0.68 −2 −2.2 1 500 15 −3 −4 ±1 2.30 µA 3 4 ±5 0V ≤ VCM ≤ 2.7V V mV µV/˚C µA IOS Input Offset Current RIN Common Mode Input Resistance 3 MΩ CIN Common Mode Input Capacitance 2 pF CMVR Input Common-Mode Voltage Range CMRR ≥ 50dB −0.5 3.0 2.8 3 3.2 −0.3 −0.1 nA V www.national.com LMH6645/46/47 Absolute Maximum Ratings (Note 1) LMH6645/46/47 2.7V Electrical Characteristics (Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 2.7V, V− = 0V, VCM = VO = V+/2, and Rf = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) Common Mode Rejection Ratio VCM Stepped from 0V to 2.7V 46 77 VCM Stepped from 0V to 1.55V 58 76 AVOL Large Signal Voltage Gain VO = 0.35V to 2.35V 76 74 87 VO Output Swing High RL = 1k to V+/2 2.55 2.66 CMRR Output Swing Low ISC IOUT Output Short Circuit Current Output Current RL = 10k to V+/2 2.68 RL = 1k to V+/2 40 + RL = 10k to V /2 20 Sourcing to V− VID = 200mV (Note 10) 43 Sinking to V+ VID = −200mV (Note 10) 42 VOUT = 0.5V from rails + 75 Max (Note 6) Units dB dB V 150 mV mA ± 20 mA 83 dB PSRR Power Supply Rejection Ratio V = 2.7V to 3.7V or V− = 0V to −1V IS Supply Current (per channel) Normal Operation 650 1250 Shutdown Mode (LMH6647 only) 15 50 µA 5V Electrical Characteristics Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 5V, V− = 0V, VCM = VO = V+/2, and Rf = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) 40 55 BW −3dB BW AV = +1, VOUT = 200mVPP en Input-Referred Voltage Noise f = 100kHz 17 f = 1kHz 25 in Input-Referred Current Noise f = 100kHz 0.75 f = 1kHz 1.20 CT Rej. Cross-Talk Rejection (LMH6646 only) f = 5MHz, Receiver: Rf = Rg = 510Ω, AV = +2 SR Slew Rate AV = −1, VO = 2VPP (Note 8, 13) TON Turn-On Time (LMH6647 only) TOFF Turn-Off Time (LMH6647 only) THSD Shutdown Threshold (LMH6647 only) IS ≤ 50µA ISD Shutdown Pin Input Current (LMH6647 only) (Note 7) VOS Input Offset Voltage 0V ≤ VCM ≤ 5V TC VOS Input Offset Average Drift (Note 12) IB Input Bias Current VCM = 4.8V (Note 7) IOS Input Offset Current Common Mode Input Resistance www.national.com nV/ pA/ 47 15 dB V/µs 22 ns 500 4.25 ns 4.60 −20 −3 −4 ±1 3 4 4 mV µV/C +0.36 +2 −2.2 −0.68 −2 −2.2 1 500 3 V µA ±5 0V ≤ VCM ≤ 5V Units MHz 210 VCM = 0.5V (Note 7) RIN Max (Note 6) µA nA MΩ (Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 5V, V− = 0V, VCM = VO = V+/2, and Rf = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter CIN Common Mode Input Capacitance CMVR Input Common-Mode Voltage Range Conditions Min (Note 6) Typ (Note 5) 2 CMRR ≥ 50dB −0.5 5.3 5.1 5.5 Common Mode Rejection Ratio VCM Stepped from 0V to 5V 56 82 VCM Stepped from 0V to 3.8V 66 85 AVOL Large Signal Voltage Gain VO = 1.5V to 3.5V 76 74 85 VO Output Swing High RL = 1k to V+/2 4.80 4.95 CMRR Output Swing Low ISC IOUT Output Short Circuit Current Output Current Max (Note 6) RL = 10k to V+/2 4.98 RL = 1k to V+/2 50 RL = 10k to V+/2 20 Sourcing to V− VID = 200mV (Note 10) 55 Sinking to V+ VID = −200mV (Note 10) 53 VOUT = 0.5V From rails ± 20 + − Units pF −0.3 −0.1 V dB dB V 200 mV mA mA PSRR Power Supply Rejection Ratio V = 5V to 6V or V = 0V to −1V IS Supply Current (per channel) Normal Operation 700 1400 Shutdown Mode (LMH6647 only) 10 50 75 95 dB µA ± 5V Electrical Characteristics Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 5V, V− = −5V, VCM = VO = 0V, Rf = 2kΩ, and RL = 1kΩ to GND. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (Note 6) Typ (Note 5) 40 55 BW −3dB BW AV = +1, VOUT = 200mVPP en Input-Referred Voltage Noise f = 100kHz 17 f = 1kHz 25 in Input-Referred Current Noise f = 100kHz 0.75 f = 1kHz 1.20 CT Rej. Cross-Talk Rejection (LMH6646 only) f = 5MHz, Receiver: Rf = Rg = 510Ω, AV = +2 SR Slew Rate AV = −1, VO = 2VPP (Note 8) TON Turn-On Time (LMH6647 only) TOFF Turn-Off Time (LMH6647 only) THSD Shutdown Threshold (LMH6647 only) IS ≤ 50µA ISD Shutdown Pin Input Current (LMH6647 only) (Note 7) VOS Input Offset Voltage −5V ≤ VCM ≤ 5V TC VOS Input Offset Average Drift (Note 12) 15 Max (Note 6) MHz nV/ pA/ 47 dB 22 V/µs 200 ns 700 ns 4.25 4.60 −20 −3 −4 ±1 ±5 5 Units V µA 3 4 mV µV/˚C www.national.com LMH6645/46/47 5V Electrical Characteristics LMH6645/46/47 ± 5V Electrical Characteristics (Continued) Unless otherwise specified, all limits guaranteed for at TJ = 25˚C, V+ = 5V, V− = −5V, VCM = VO = 0V, Rf = 2kΩ, and RL = 1kΩ to GND. Boldface limits apply at the temperature extremes. Symbol Parameter Input Bias Current IB Conditions Min (Note 6) VCM = 4.8V (Note 7) VCM = −4.5V (Note 7) −5V ≤ VCM ≤ 5V Typ (Note 5) Max (Note 6) +0.40 +2 +2.2 −0.65 −2 −2.2 3 500 Units µA IOS Input Offset Current RIN Common Mode Input Resistance 3 MΩ CIN Common Mode Input Capacitance 2 pF CMVR Input Common-Mode Voltage Range CMRR ≥ 50dB −5.5 5.3 5.1 5.5 Common Mode Rejection Ratio VCM Stepped from −5V to 5V 60 84 VCM Stepped from −5V to 3.5V 66 104 AVOL Large Signal Voltage Gain VO = −2V to 2V 76 74 85 VO Output Swing High 4.70 4.92 RL = 10kΩ 4.97 Output Swing Low RL = 1kΩ −4.93 RL = 10kΩ −4.98 Output Short Circuit Current Sourcing to V− VID = 200mV (Note 10) 66 Sinking to V+ VID = −200mV (Note 10) 61 CMRR ISC IOUT Output Current RL = 1kΩ − V dB dB V −4.70 V mA ± 20 VOUT = 0.5V from rails + −5.3 −5.1 nA mA PSRR Power Supply Rejection Ratio V = 5V to 6V or V = −5V to −6V IS Supply Current (per channel) Normal Operation 725 1600 Shutdown Mode (LMH6647 only) 10 50 76 95 dB µA Note 1: 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 guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics. Note 2: Human body model, 1.5kΩ in series with 100pF. Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150˚C. Note 4: The maximum power dissipation is a function of TJ(MAX), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/ θJA . All numbers apply for packages soldered directly onto a PC board. Note 5: Typical values represent the most likely parametric norm. Note 6: All limits are guaranteed by testing or statistical analysis. Note 7: Positive current corresponds to current flowing into the device. Note 8: Slew rate is the average of the rising and falling slew rates. Note 9: Machine Model, 0Ω in series with 200pF. Note 10: Short circuit test is a momentary test. See Note 11. Note 11: Output short circuit duration is infinite for VS < 6V at room temperature and below. For VS > 6V, allowable short circuit duration is 1.5ms. Note 12: Offset voltage average drift determined by dividing the change in VOS at temperature extremes into the total temperature change. Note 13: Guaranteed based on characterization only. www.national.com 6 LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. Closed Loop Frequency Response for Various Temperature Frequency Response for Various AV 20020248 20020249 Open Loop Gain/Phase vs. Frequency for Various Temperature THD vs. Output Swing 20020250 20020253 THD vs. Output Swing Output Swing vs. Frequency 20020254 20020255 7 www.national.com LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. Settling Time vs. Step Size (Continued) Noise vs. Frequency 20020252 20020234 + − VOUT from V vs. ISOURCE VOUT from V vs. ISINK 20020237 20020238 + + Output Swing from V vs. RL (tied to VS/2) Output Swing from V vs. RL (tied to VS/2) 20020202 www.national.com 20020206 8 Output Swing from V+ vs. RL (tied to VS/2) (Continued) Output Swing from V− vs. RL (tied to VS/2) 20020204 20020203 − − Output Swing from V vs. RL (tied to VS/2) Output Swing from V vs. RL (tied to VS/2) 20020205 20020207 Cap Load Tolerance and Setting Time vs. Closed Loop Gain ZOUT vs. Frequency 20020201 20020216 9 www.national.com LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. PSRR vs. Frequency (Continued) CMRR vs. Frequency 20020247 20020251 Crosstalk Rejection vs. Frequency (Output to Output) (LMH6646) VOS Distribution 20020225 20020257 VOSvs. VS (A Typical Unit) VOSvs. VOUT (A Typical Unit) 20020228 20020218 www.national.com 10 VOSvs. VOUT (A Typical Unit) (Continued) VOSvs. VCM (A Typical Unit) 20020229 20020231 VOSvs. VCM (A Typical Unit) VOSvs. VCM (A Typical Unit) 20020230 20020232 IB vs. VCM IB vs. VCM 20020226 20020219 11 www.national.com LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. IB vs. VS (Continued) IS vs. VCM 20020227 20020223 IS (mA) (per channel) IS vs. VSHUTDOWN (LMH6647) 20020224 20020221 IS vs. VSHUTDOWN (LMH6647) IS vs. VSHUTDOWN (LMH6647) 20020220 www.national.com 20020222 12 Shutdown Pin and Supply Current vs. Shutdown Voltage (Continued) Small Signal Step Response 20020243 20020208 Large Signal Step Response Large Signal Step Response 20020244 20020245 Output Overload Recovery 20020246 13 www.national.com LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. LMH6645/46/47 This device family is designed to avoid output phase reversal. With input over-drive, the output is kept near the supply rail (or as close to it as mandated by the closed loop gain setting and the input voltage). Figure 1, below, shows the input and output voltage when the input voltage significantly exceeds the supply voltages: Application Notes CIRCUIT DESCRIPTION The LMH6645/6646/6647 family is based on National Semiconductor’s proprietary VIP10 dielectrically isolated bipolar process. This device family architecture features the following: • Complimentary bipolar devices with exceptionally high ft (∼8GHz) even under low supply voltage (2.7V) and low Collector bias current. • Rail-to-Rail input which allows the input common mode voltage to go beyond either rail by about 0.5V typically. • A class A-B “turn-around” stage with improved noise, offset, and reduced power dissipation compared to similar speed devices (patent pending). • Common Emitter push-pull output stage capable of 20mA output current (at 0.5V from the supply rails) while consuming only ∼700µA of total supply current per channel. This architecture allows output to reach within milli-volts of either supply rail at light loads. • Consistent performance from any supply voltage (2.7V10V) with little variation with supply voltage for the most important specifications (e.g. BW, SR, IOUT, etc.) 20020233 FIGURE 1. Input/Output Shown with Exceeded Input CMVR APPLICATION HINTS The total input common mode voltage range, which extends from below V− to beyond V+, is covered by both a PNP and a NPN stage. The NPN stage is switched on whenever the input is less than 1.2V from V+ and the PNP stage covers the rest of the range. In terms of the input voltage, there is an overlapping region where both stages are processing the input signal. This region is about 0.5V from beginning to the end. As far as the device application is concerned, this transition is a transparent operation. However, keep in mind that the input bias current value and direction will depend on which input stage is operating (see typical performance characteristics for plots). For low distortion applications, it is best to keep the input common mode voltage from transversing this transition point. Low gain settling applications, which generally encounter larger peak-to-peak input voltages, could be configured as inverting stages to eliminate common mode voltage fluctuations. In terms of the output, when the output swing approaches either supply rail, the output transistor will enter a Quasisaturated state. A subtle effect of this operational region is that there is an increase in supply current in this state (up to 1mA). The onset of Quasi-saturation region is a function of output loading (current) and varies from 100mV at no load to about 1V when output is delivering 20mA, as measured from supplies. Both input common mode voltage and output voltage level effect the supply current (see typical performance characteristics for plot). With 2.7V supplies and a common mode input voltage range that extends beyond either supply rail, the LMH6645/6646/ 6647 family is well suited to many low voltage/low power applications. Even with 2.7V supplies, the −3dB BW (@ AV = +1) is typically 55MHz with a tested limit of 45MHz. Production testing guarantees that process variations will not compromise speed. www.national.com As can be seen, the output does not exhibit any phase reversal as some op amps do. However, if the input voltage range is exceeded by more than a diode drop beyond either rail, the internal ESD protection diodes will start to conduct. The current flow in these ESD diodes should be externally limited. LMH6647 MICRO-POWER SHUTDOWN The LMH6647 can be shutdown to save power and reduce its supply current to less than 50µA guaranteed, by applying a voltage to the SD pin. The SD pin is “active high” and needs to be tied to V− for normal operation. This input is low current ( < 20µA, 4pF equivalent capacitance) and a resistor to V− (≤20kΩ) will result in normal operation. Shutdown is guaranteed when SD pin is 0.4V or less from V+ at any operating supply voltage and temperature. In the shutdown mode, essentially all internal device biasing is turned off in order to minimize supply current flow and the output goes into Hi-Z (high impedance) mode. Complete device Turn-on and Turn-off times vary considerably relative to the output loading conditions, output voltage, and input impedance, but is generally limited to less than 1µs (see tables for actual data). 14 LMH6645/46/47 Application Notes Figure 4 shows the output waveform. (Continued) During shutdown, the input stage has an equivalent circuit as shown below in Figure 2 20020236 20020256 FIGURE 4. Output Held Low by Active Pull-Down Circuit FIGURE 2. LMH6647 Equivalent Input in Shutdown Mode If bipolar transistor power dissipation is not tolerable, the switch could be by a N-channel enhancement mode MOSFET. As can be seen above, in shutdown, there may be current flow through the internal diodes shown, caused by input potential, if present. This current may flow through the external feedback resistor and result in an apparent output signal. In most shutdown applications the presence of this output is inconsequential. However, if the output is “forced” by another device such as in a multiplexer, the other device will need to conduct the current described in order to maintain the output potential. To keep the output at or near ground during shutdown when there is no other device to hold the output low, a switch (transistor) could be used to shunt the output to ground. Figure 3 shows a circuit where a NPN bipolar is used to keep the output near ground (∼80mV): 2.7V SINGLE SUPPLY RRIO 2:1 MUX The schematic show in Figure 5 will function as a 2:1 MUX operating on a single 2.7V power supply, by utilizing the shutdown feature of the LMH6647: 20020264 FIGURE 3. Active Pull-Down Schematic 20020258 FIGURE 5. 2:1 MUX Operating off a 2.7V Single Supply 15 www.national.com LMH6645/46/47 Application Notes ground will cause frequency response peaking and possible circuit oscillations (see Application Note OA-15 for more information). Another important parameter in working with high speed/ high performance amplifiers, is the component values selection. Choosing large valued external resistors, will effect the closed loop behavior of the stage because of the interaction of these resistors with parasitic capacitances. These capacitors could be inherent to the device or a by-product of the board layout and component placement. Either way, keeping the resistor values lower, will diminish this interaction. On the other hand, choosing very low value resistors could load down nodes and will contribute to higher overall power dissipation. National Semiconductor suggests the following evaluation boards as a guide for high frequency layout and as an aid in device testing and characterization: (Continued) Figure 6 shows the MUX output when selecting between a 1MHz sine and a 250KHz triangular waveform. 20020235 FIGURE 6. 2:1 MUX Output As can be seen in Figure 6, the output is well behaved and there are no spikes or glitches due to the switching. Switching times are approximately around 500ns based on the time when the output is considered “valid”. Package Evaluation Board PN LMH6645MF SOT23-5 CLC730068 LMH6645MA 8-Pin SOIC CLC730027 LMH6646MA 8-Pin SOIC CLC730036 LMH6646MM 8-Pin MSOP CLC730123 LMH6647MA 8-Pin SOIC CLC730027 LMH6647MF SOT23-6 CLC730116 These free evaluation boards are shipped when a device sample request is placed with National Semiconductor. PRINTED CIRCUIT BOARD LAYOUT, COMPONENT VALUES SELECTION, AND EVALUATION BOARDS Generally, a good high-frequency layout will keep power supply and ground traces away from the inverting input and output pins. Parasitic capacitances on these nodes to www.national.com Device LMH6647 Evaluation For normal operation, tie the SD pin to V−. 16 LMH6645/46/47 Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SOT23 NS Package Number MF05A 6-Pin SOT23 NS Package Number MF06A 17 www.national.com LMH6645/46/47 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Pin SOIC NS Package Number M08A 8Pin MSOP NS Package Number MUA08A www.national.com 18 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information visit us at www.national.com. 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