Datasheet Linear Technology LTC1063 — Datenblatt

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  Linear Technology Magazine Circuit Collection, Volume 1 &mdash AN52
  PDF, 190 Kb, Datei veröffentlicht: Jan 1, 1993
  This application note consolidates the circuits from the first few years of Linear Technology magazine into one publication. Presented in the note are a variety of circuits ranging from a 50W high efficiency (>90%) switching regulator to steep roll-off filter circuits with low distortion to 12-bit differential temperature measurement systems.
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  Application Note 52
  January 1993
  Linear Technology Magazine Circuit Collection, Volume 1
  Richard Markell, Editor
  Introduction
  Over the past several years Linear Technology, the magazine, has come of age. From nothing, the publication has
  come into its own, as has its subscriber list. Many innovative circuits have seen the light of day in the pages of our
  now hallowed publication. This Application Note is meant to consolidate the circuits
  from the first few years of the magazine in one place.
  Circuits herein range from laser diode driver circuits to
  data acquisition systems to a 50W high efficiency switcher
  circuit. Enough said. I’ll stand aside and let the authors
  explain their circuits.
  L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
  Technology Corporation. All other trademarks are the property of their respective owners. CIRCUIT INDEX
  A-to-D Converters .2
  LTC1292: 12-BIT DATA ACQUISITION CIRCUITS .2
  Temperature-Measurement System .2
  Floating, 12-Bit Data Acquisition System .2
  Differential Temperature Measurement System .2
  MICROPOWER SO8 PACKAGED ADC CIRCUITS .4
  Floating 8-Bit Data Acquisition System .4
  0В°C – 70В°C Thermometer .5 …

Konstruktionshinweise

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  A 1mV Offset, Clock-Tunable, Monolithic 5-Pole Lowpass Filter &mdash DN67
  PDF, 73 Kb, Datei veröffentlicht: Feb 1, 1993
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  A 1mV Offset, Clock-Tunable, Monolithic 5-Pole
  Lowpass Filter -Design Note 67
  Nello Sevastopoulos
  The LTC В®1063 is the п¬Ѓrst monolithic lowpass п¬Ѓlter
  simultaneously offering outstanding DC and AC performance. It features internal or external clock tunability,
  cutoff frequencies up to 50kHz, 1mV typical output DC
  offset, and a dynamic range in excess of 12 bits for over
  a decade of input voltage.
  The LTC1063 approximates a 5-pole Butterworth lowpass п¬Ѓlter. The unique internal architecture of the п¬Ѓlter
  allows outstanding amplitude matching from device to
  device. Typical matching ranges from 0.01dB at 25%
  of the п¬Ѓlter passband to 0.05dB at 50% of the п¬Ѓlter
  passband. This capability is important for multichannel
  data-acquisition systems where channel-to-channel
  matching is critical.
  Using the Filter’s Internal Oscillator
  An internal or external clock programs the filter’s cutoff
  frequency. The clock-to-cutoff frequency ratio is 100:1.
  In the absence of an external clock, the LTC1063’s internal precision oscillator can be used. An external resistor
  and capacitor set the device’s internal clock frequency
  (Figure 1). The internal oscillator output is brought out
  VIN 1 1 3 –5V
  0.1ОјF 7 …

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  Source Resistance Induced Distortion in Op Amps &mdash DN84
  PDF, 355 Kb, Datei veröffentlicht: Jul 1, 1994
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  Source Resistance Induced Distortion in Op Amps
  Design Note 84
  William H. Gross RS
  VIN
  20VP-P +
  DUT –
  –15V VOUT DISTORTION
  ANALYZER DN84 F01 Figure 1 Results
  Unfortunately there is no easy way to predict which amplifiers will have the lowest source resistance induced
  distortion from the data sheets. There are two main
  causes of the distortion: nonlinear input resistance and
  nonlinear input capacitance. At first thought, one would
  not expect the small input capacitance of an op amp to
  cause distortion at a few kHz. But a 10k source is loaded 07/94/84_conv TOTAL HARMONIC DISTROTION (%) 10
  OP27 0.01 12 LF356 14
  0.001 0.0001
  100 16 LT1169
  LT1355 LT1124
  10k
  1k
  SOURCE RESISTANCE (О©) 18 100k
  DN84 F02 Figure 2. 1kHz Distortion vs Source Resistance
  1 …

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• Signal Conditioning > Filters > Lowpass Filters