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LMH6645 Dataheets PDF



Part Number LMH6645
Manufacturers National Semiconductor
Logo National Semiconductor
Description Rail-to-Rail Input and Output Amplifiers
Datasheet LMH6645 DatasheetLMH6645 Datasheet (PDF)

LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option February 2002 LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option General Description The LMH6645 (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 .

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LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option February 2002 LMH6645/46/47 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option General Description The LMH6645 (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 © 2002 National Semiconductor Corporation DS200202 www.national.com LMH6645/46/47 Connection Diagrams SOIC-8 (LMH6647) (Continued) 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) Soldering Information Infrared or Convection (20 sec) Wave Soldering (10 sec) 235˚C 260˚C 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) Operating Ratings (Note 1) Supply Voltage (V+ – V−) Junction 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 3 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) 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 .


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