LMH6646MA

LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option June 2005 LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option General Description The LMH™6645 (single) and LMH6646 (dual), rail-to-rail 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. Features (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/ 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) 20020259 20020260 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 SOIC-8 (LMH6647) SOIC-8 and MSOP-8 (LMH6646) 20020262 20020263 Top View Top View Ordering Information Package 5-Pin SOT-23 6-Pin SOT-23 SOIC-8 Part Number LMH6645MF LMH6645MFX LMH6647MF LMH6647MFX LMH6645MA LMH6645MAX LMH6646MA LMH6646MAX LMH6647MA LMH6647MAX MSOP-8 LMH6646MM LMH6646MMX A70A LMH6647MA LMH6646MA LMH6645MA A69A Package Marking A68A Transport Media 1k Units Tape and Reel 3k Units Tape and Reel 1k Units Tape and Reel 3k Units Tape and Reel 95 Units Rails 2.5k Units Tape and Reel 95 Units Rails 2.5k Units Tape and Reel 95 Units Rails 2.5k Units Tape and Reel 1k Units Tape and Reel 3.5k Units Tape and Reel MUA08A M08A MF06A NSC Drawing MF05A www.national.com 2 LMH6645/46/47 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance Human Body Machine Model VIN Differential Output Short Circuit Duration Supply Voltage (V+ - V−) Voltage at Input/Output pins Storage Temperature Range Junction Temperature (Note 4) 2KV (Note 2) 200V (Note 9) Soldering Information Infrared or Convection (20 sec) Wave Soldering (10 sec) 235˚C 260˚C Operating Ratings (Note 1) Supply Voltage (V+ – V−) Temperature Range (Note 4) Package Thermal Resistance (Note 4) (θJA) SOT23-5 SOT23-6 SOIC-8 MSOP-8 265˚C/W 265˚C/W 190˚C/W 235˚C/W 2.5V to 12V −40˚C to +85˚C ± 2.5V (Note 3, 11) 12.6V V+ +0.8V, V− −0.8V −65˚C to +150˚C +150˚C 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 BW en in CT Rej. SR TON TOFF THSD ISD VOS TC VOS IB −3dB BW Input-Referred Voltage Noise Input-Referred Current Noise Cross-Talk Rejection (LMH6646 only) Slew Rate Turn-On Time (LMH6647 only) Turn-Off Time (LMH6647 only) Shutdown Threshold (LMH6647 only) Shutdown Pin Input Current (LMH6647 only) Input Offset Voltage Input Offset Average Drift Input Bias Current IS ≤ 50µA (Note 7) 0V ≤ VCM ≤ 2.7V (Note 12) VCM = 2.5V (Note 7) VCM = 0.5V (Note 7) IOS RIN CIN CMVR Input Offset Current Common Mode Input Resistance Common Mode Input Capacitance Input Common-Mode Voltage Range CMRR ≥ 50dB 3.0 2.8 0V ≤ VCM ≤ 2.7V −3 −4 Parameter Conditions AV = +1, VOUT = 200mVPP, VCM = 0.7V f = 100kHz f = 1kHz f = 100kHz f = 1kHz f = 5MHz, Receiver: Rf = Rg = 510Ω, AV = +2 AV = −1, VO = 2VPP (Note 8, 13) 15 Min (Note 6) 40 Typ (Note 5) 55 17 25 0.75 1.20 47 22 250 560 1.95 −20 2.30 Max (Note 6) Units MHz nV/ pA/ dB V/µs ns ns V µA ±1 ±5 0.40 −0.68 1 3 2 −0.5 3.2 3 4 2 2.2 −2 −2.2 500 mV µV/˚C µA nA MΩ pF −0.3 −0.1 V 3 www.national.com LMH6645/46/47 2.7V Electrical Characteristics Symbol CMRR AVOL VO Parameter Common Mode Rejection Ratio Large Signal Voltage Gain Output Swing High Output Swing Low ISC Output Short Circuit Current (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. Conditions VCM Stepped from 0V to 2.7V VCM Stepped from 0V to 1.55V VO = 0.35V to 2.35V RL = 1k to V+/2 RL = 10k to V+/2 RL = 1k to V+/2 RL = 10k to V /2 Sourcing to V− VID = 200mV (Note 10) Sinking to V+ VID = −200mV (Note 10) IOUT PSRR IS Output Current Power Supply Rejection Ratio Supply Current (per channel) VOUT = 0.5V from rails V = 2.7V to 3.7V or V− = 0V to −1V Normal Operation Shutdown Mode (LMH6647 only) + + Min (Note 6) 46 58 76 74 2.55 Typ (Note 5) 77 76 87 2.66 2.68 40 20 43 42 Max (Note 6) Units dB dB V 150 mV mA ± 20 75 83 650 15 1250 50 mA dB 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 BW en in CT Rej. SR TON TOFF THSD ISD VOS TC VOS IB −3dB BW Input-Referred Voltage Noise Input-Referred Current Noise Cross-Talk Rejection (LMH6646 only) Slew Rate Turn-On Time (LMH6647 only) Turn-Off Time (LMH6647 only) Shutdown Threshold (LMH6647 only) Shutdown Pin Input Current (LMH6647 only) Input Offset Voltage Input Offset Average Drift Input Bias Current IS ≤ 50µA (Note 7) 0V ≤ VCM ≤ 5V (Note 12) VCM = 4.8V (Note 7) VCM = 0.5V (Note 7) IOS RIN Input Offset Current Common Mode Input Resistance 4 Parameter Conditions AV = +1, VOUT = 200mVPP f = 100kHz f = 1kHz f = 100kHz f = 1kHz f = 5MHz, Receiver: Rf = Rg = 510Ω, AV = +2 AV = −1, VO = 2VPP (Note 8, 13) Min (Note 6) 40 Typ (Note 5) 55 17 25 0.75 1.20 47 Max (Note 6) Units MHz nV/ pA/ dB V/µs ns ns 15 22 210 500 4.25 4.60 V −20 −3 −4 µA 3 4 +2 −2.2 −2 −2.2 500 mV µV/C ±1 ±5 +0.36 −0.68 1 3 µA 0V ≤ VCM ≤ 5V nA MΩ www.national.com LMH6645/46/47 5V Electrical Characteristics Symbol CIN CMVR Parameter Common Mode Input Capacitance Input Common-Mode Voltage Range (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. Conditions Min (Note 6) Typ (Note 5) 2 CMRR ≥ 50dB 5.3 5.1 CMRR AVOL VO Common Mode Rejection Ratio Large Signal Voltage Gain Output Swing High Output Swing Low ISC Output Short Circuit Current VCM Stepped from 0V to 5V VCM Stepped from 0V to 3.8V VO = 1.5V to 3.5V RL = 1k to V+/2 RL = 10k to V+/2 RL = 1k to V+/2 RL = 10k to V+/2 Sourcing to V− VID = 200mV (Note 10) Sinking to V+ VID = −200mV (Note 10) IOUT PSRR IS Output Current Power Supply Rejection Ratio Supply Current (per channel) VOUT = 0.5V From rails V = 5V to 6V or V = 0V to −1V Normal Operation Shutdown Mode (LMH6647 only) + − Max (Note 6) Units pF −0.5 5.5 82 85 85 4.95 4.98 50 20 55 −0.3 −0.1 V 56 66 76 74 4.80 dB dB V 200 mV mA 53 ± 20 75 95 700 10 1400 50 mA 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 BW en in CT Rej. SR TON TOFF THSD ISD VOS TC VOS −3dB BW Input-Referred Voltage Noise Input-Referred Current Noise Cross-Talk Rejection (LMH6646 only) Slew Rate Turn-On Time (LMH6647 only) Turn-Off Time (LMH6647 only) Shutdown Threshold (LMH6647 only) Shutdown Pin Input Current (LMH6647 only) Input Offset Voltage Input Offset Average Drift IS ≤ 50µA (Note 7) −5V ≤ VCM ≤ 5V (Note 12) −3 −4 Parameter Conditions AV = +1, VOUT = 200mVPP f = 100kHz f = 1kHz f = 100kHz f = 1kHz f = 5MHz, Receiver: Rf = Rg = 510Ω, AV = +2 AV = −1, VO = 2VPP (Note 8) 15 Min (Note 6) 40 Typ (Note 5) 55 17 25 0.75 1.20 47 22 200 700 4.25 −20 3 4 4.60 Max (Note 6) Units MHz nV/ pA/ dB V/µs ns ns V µA ±1 ±5 mV µV/˚C 5 www.national.com LMH6645/46/47 ± 5V Electrical Characteristics Symbol IB Parameter Input Bias Current (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. Conditions VCM = 4.8V (Note 7) VCM = −4.5V (Note 7) IOS RIN CIN CMVR Input Offset Current Common Mode Input Resistance Common Mode Input Capacitance Input Common-Mode Voltage Range CMRR ≥ 50dB 5.3 5.1 CMRR AVOL VO Common Mode Rejection Ratio Large Signal Voltage Gain Output Swing High Output Swing Low ISC Output Short Circuit Current VCM Stepped from −5V to 5V VCM Stepped from −5V to 3.5V VO = −2V to 2V RL = 1kΩ RL = 10kΩ RL = 1kΩ RL = 10kΩ Sourcing to V− VID = 200mV (Note 10) Sinking to V+ VID = −200mV (Note 10) IOUT PSRR IS Output Current Power Supply Rejection Ratio Supply Current (per channel) VOUT = 0.5V from rails V = 5V to 6V or V = −5V to −6V Normal Operation Shutdown Mode (LMH6647 only) + − Min (Note 6) Typ (Note 5) +0.40 −0.65 3 3 2 −5.5 5.5 84 104 85 4.92 4.97 −4.93 −4.98 66 Max (Note 6) +2 +2.2 −2 −2.2 500 Units µA −5V ≤ VCM ≤ 5V nA MΩ pF −5.3 −5.1 V 60 66 76 74 4.70 dB dB V −4.70 V mA 61 ± 20 76 95 725 10 1600 50 mA 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 Closed Loop Frequency Response for Various Temperature At TJ = 25˚C. Unless otherwise specified. 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 20020206 www.national.com 8 LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. 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) − 20020207 20020205 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. PSRR vs. Frequency (Continued) CMRR vs. Frequency 20020247 20020251 Crosstalk Rejection vs. Frequency (Output to Output) (LMH6646) VOS Distribution 20020257 20020225 VOSvs. VS (A Typical Unit) VOSvs. VOUT (A Typical Unit) 20020218 20020228 www.national.com 10 LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. 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. IB vs. VS IS vs. VCM (Continued) 20020227 20020223 IS (mA) (per channel) IS vs. VSHUTDOWN (LMH6647) 20020224 20020221 IS vs. VSHUTDOWN (LMH6647) IS vs. VSHUTDOWN (LMH6647) 20020220 20020222 www.national.com 12 LMH6645/46/47 Typical Performance Characteristics At TJ = 25˚C. Unless otherwise specified. 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 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.) 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. 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: 20020233 FIGURE 1. Input/Output Shown with Exceeded Input CMVR 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). www.national.com 14 LMH6645/46/47 Application Notes (Continued) Figure 4 shows the output waveform. During shutdown, the input stage has an equivalent circuit as shown below in Figure 2 20020236 20020256 FIGURE 2. LMH6647 Equivalent Input in Shutdown Mode 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): FIGURE 4. Output Held Low by Active Pull-Down Circuit If bipolar transistor power dissipation is not tolerable, the switch could be by a N-channel enhancement mode MOSFET. 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 (Continued) Figure 6 shows the MUX output when selecting between a 1MHz sine and a 250KHz triangular waveform. 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: Device Package SOT23-5 8-Pin SOIC 8-Pin SOIC 8-Pin MSOP 8-Pin SOIC SOT23-6 Evaluation Board PN CLC730068 CLC730027 CLC730036 CLC730123 CLC730027 CLC730116 20020235 LMH6645MF LMH6645MA LMH6646MA LMH6646MM LMH6647MA LMH6647MF 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”. 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 These free evaluation boards are shipped when a device sample request is placed with National Semiconductor. LMH6647 Evaluation For normal operation, tie the SD pin to V−. www.national.com 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 LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option Notes 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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