Datasheet Linear Technology LT1034IZ-1.2 — Datenblatt

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LT1034 LT1034BCZ-1.2 LT1034BCZ-2.5 LT1034BIZ-1.2 LT1034BIZ-2.5 LT1034CS8-1.2 LT1034CS8-2.5 LT1034CZ-1.2 LT1034CZ-2.5 LT1034IS8-1.2 LT1034IS8-2.5 LT1034IZ-2.5

Anwendungshinweise

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  Designing Linear Circuits for 5V Single Supply Operation &mdash AN11
  PDF, 230 Kb, Datei veröffentlicht: Sep 1, 1985
  This note covers the considerations for designing precision linear circuits which must operate from a single 5V supply. Applications include various transducer signal conditioners, instrumentation amplifiers, controllers and isolated data converters.
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  Application Note 11
  September 1985
  Designing Linear Circuits for 5V Single Supply Operation
  Jim Williams
  In predominantly digital systems it is often necessary
  to include linear circuit functions. Traditionally, separate
  power supplies have been used to run the linear components (see Box, “Linear Power Supplies—Past, Present,
  and Future”).
  Recently, there has been increasing interest in powering
  linear circuits directly from the 5V logic rail. The logic
  rail is a difficult place for analog components to function.
  The high amplitude broadband current and voltage noise
  generated by logic clocking makes analog circuit operation difficult. (See Box, “Using Logic Supplies for Linear
  Functions”.)
  Generally speaking, analog circuitry which must achieve
  very high performance levels should be driven from dedicated supplies. The difficulties encountered in maintaining
  the lowest possible levels of noise and drift in an analog
  system are challenging enough without contending with
  a digitally corrupted power supply.
  Many analog applications, however, can be successfully
  implemented using the logic supply. Combining components intended to provide high performance from the 167Ω Q1 –
  + 2M 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. RATIOMETRIC …

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  Circuit Techniques for Clock Sources &mdash AN12
  PDF, 150 Kb, Datei veröffentlicht: Oct 1, 1985
  Circuits for clock sources are presented. Special attention is given to crystal-based designs including TXCOs and VXCOs.
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  Application Note 12
  October 1985
  Circuit Techniques for Clock Sources
  Jim Williams
  Almost all digital or communication systems require some
  form of clock source. Generating accurate and stable clock
  signals is often a difficult design problem.
  Quartz crystals are the basis for most clock sources. The
  combination of high Q, stability vs time and temperature,
  and wide available frequency range make crystals a
  price-performance bargain. Unfortunately, relatively little
  information has appeared on circuitry for crystals and
  engineers often view crystal circuitry as a black art, best
  left to a few skilled practitioners (see box, “About Quartz
  Crystals”).
  In fact, the highest performance crystal clock circuitry does
  demand a variety of complex considerations and subtle
  implementation techniques. Most applications, however,
  don’t require this level of attention and are relatively easy
  to serve. Figure 1 shows five (5) forms of simple crystal
  clocks. Types 1a through 1d are commonly referred to
  as gate oscillators. Although these types are popular,
  they are often associated with temperamental operation, …

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  Circuitry for Single Cell Operation &mdash AN15
  PDF, 195 Kb, Datei veröffentlicht: Nov 1, 1985
  1.5V powered circuits for complex linear functions are detailed. Designs include a V/F converter, a 10-bit A/D, sample-hold amplifiers, a switching regulator and other circuits. Also included is a section of component considerations for 1.5V powered linear circuits.
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  Application Note 15
  November 1985
  Circuitry for Single Cell Operation
  Jim Williams
  Portable, battery-powered operation of electronic apparatus has become increasingly desirable. Medical, remote
  data acquisition, power monitoring and other applications
  are good candidates for battery operation. In some circumstances, due to space, power or reliability considerations,
  it is preferable to operate the circuitry from a single 1.5V
  cell. Unfortunately, a 1.5V supply eliminates almost all
  linear ICs as design candidates. In fact, the LM10 op
  amp-reference and the LTВ®1017/LT1018 comparators are
  the only IC gain blocks fully specified for 1.5V operation.
  Further complications are presented by the 600mV drop
  of silicon transistors and diodes. This limitation consumes
  a substantial portion of available supply range, making
  circuit design difficult. Additionally, any circuit designed
  for 1.5V operation must function at end-of-life battery
  voltage, typically 1.3V. (See Box Section, “Components
  for 1.5V Operation.”)
  500k
  10kHz
  TRIM
  EIN …

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  Micropower Circuits for Signal Conditioning &mdash AN23
  PDF, 2.2 Mb, Datei veröffentlicht: Apr 1, 1987
  Low power operation of electronic apparatus has become increasingly desirable. AN23 describes a variety of low power circuits for transducer signal conditioning. Also included are designs for data converters and switching regulators. Three appended sections discuss guidelines for micropower design, strobed power operation and effects of test equipment on micropower circuits.
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  Application Note 23
  April 1987
  Micropower Circuits for Signal Conditioning
  Jim Williams
  Low power operation of electronic apparatus has become
  increasingly desirable. Medical, remote data acquisition,
  power monitoring and other applications are good candidates for battery driven, low power operation. Micropower
  analog circuits for transducer-based signal conditioning
  present a special class of problems. Although micropower
  ICs are available, the interconnection of these devices to
  form a functioning micropower circuit requires care. (See
  Box Sections, “Some Guidelines for Micropower Design
  and an Example” and “Parasitic Effects of Test Equipment
  on Micropower Circuits.”) In particular, trade-offs between
  signal levels and power dissipation become painful when
  performance in the 10-bit to 12-bit area is desirable. Additionally, many transducers and analog signals produce +V inherently small outputs, making micropower requirements complicate an already difficult situation. Despite the
  problems, design of such circuits is possible by combining
  high performance micropower ICs with appropriate circuit
  techniques.
  Platinum RTD Signal Conditioner
  Figure 1 shows a simple circuit for signal conditioning
  a platinum RTD. Correction for the platinum sensor’s
  nonlinear response is included. Accuracy is 0.25В°C over …

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  Bridge Circuits &mdash AN43
  PDF, 3.8 Mb, Datei veröffentlicht: Jun 1, 1990
  Subtitled "Marrying Gain and Balance," this note covers signal conditioning circuits for various types of bridges. Included are transducer bridges, AC bridges, Wien bridge oscillators, Schottky bridges, and others. Special attention is given to amplifier selection criteria. Appended sections cover strain gauge transducers, understanding distortion measurements, and historical perspectives on bridge readout mechanisms and Wein bridge oscillators.
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  Application Note 43
  June 1990
  Bridge Circuits
  Marrying Gain and Balance
  Jim Williams
  Bridge circuits are among the most elemental and powerful
  electrical tools. They are found in measurement, switching, oscillator and transducer circuits. Additionally, bridge
  techniques are broadband, serving from DC to bandwidths
  well into the GHz range. The electrical analog of the mechanical beam balance, they are also the progenitor of all
  electrical differential techniques. and stability of the basic configuration. In particular, transducer manufacturers are quite adept at adapting the bridge
  to their needs (see Appendix A, “Strain Gauge Bridges”).
  Careful matching of the transducer’s mechanical characteristics to the bridge’s electrical response can provide a
  trimmed, calibrated output. Similarly, circuit designers
  have altered performance by adding active elements (e.g.,
  amplifiers) to the bridge, excitation source or both. Resistance Bridges
  Figure 1 shows a basic resistor bridge. The circuit is
  usually credited to Charles Wheatstone, although S. H.
  Christie, who demonstrated it in 1833, almost certainly
  preceded him.1 If all resistor values are equal (or the two
  sides ratios are equal) the differential voltage is zero. The
  excitation voltage does not alter this, as it affects both
  sides equally. When the bridge is operating off null, the
  excitation’s magnitude sets output sensitivity. The bridge …

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  Data Acquisition Circuit Collection &mdash AN62
  PDF, 349 Kb, Datei veröffentlicht: Oct 1, 1994
  This application note presents a wide variety of data acquisition circuits. The detailed circuit schematics cover 8-, 10-, and 12- bit ADC and DAC applications, serial and parallel digital interfaces, battery monitoring, temperature sensing, isolated interfaces, and connections to various popular microprocessors and microcontrollers. An appendix covers suggested voltage references.
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  Application Note 62
  October 1994
  Data Acquisition Circuit Collection
  Kevin R. Hoskins
  INTRODUCTION
  This application note features 8-, 10-, and 12-bit data
  acquisition components in various circuit configurations.
  The circuits include battery monitoring, temperature sensing, isolated serial interfaces, and microprocessor and
  microcontroller serial and parallel interfaces. Also included are voltage reference circuits (Application Note 42
  contains more voltage reference circuits). Additional circuit information is located in the information
  references listed in the Circuit Index. Each information
  reference refers to either an application note (example:
  AN42 = Application Note 42), a data sheet (example:
  LTCВ®1292 DS = LTC1292 Data Sheet), or a design note
  (example: DN66 = Design Note 66).
  and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation. CIRCUIT INDEX
  FIGURE TITLE
  FIGURE NO.
  General Analog-to-Digital Application Circuits
  Two-Quadrant 150kHz Bandwidth Analog Multiplier . Figure 1 .
  Infinite Hold-Time Sample-and-Hold (tACQ = 240ns) . Figure 2 .
  Four-Quadrant 250kHz Bandwidth Analog Multiplier . Figure 3 .
  Demodulating a Signal Using Undersampling . Figure 4 . …

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  A Seven-Nanosecond Comparator for Single Supply Operation &mdash AN72
  PDF, 882 Kb, Datei veröffentlicht: May 1, 1998
  AN72 is an extensive discussion of the causes and cures of problems in very high speed comparator circuits. A separate applications section uses the 7ns LT1394 in V-to-F converters, crystal oscillators, clock skew generators, triggers, sampling configurations and a nanosecond pulse stretcher. Appendices cover related topics.
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  Application Note 72
  May 1998
  A Seven-Nanosecond Comparator
  for Single Supply Operation
  Guidance for Putting Civilized Speed to Work
  Jim Williams INTRODUCTION
  In 1985 Linear Technology Corporation introduced the
  LT В®1016 Comparator. This device was the first readily
  usable, high speed TTL comparator. Previous ICs were
  either too slow or unstable, preventing widespread
  acceptance. The LT1016 was, and is, a highly successful
  product.
  Recent technology trends have emphasized low power,
  single supply operation. The LT1016, although capable of
  such operation, does not include ground in its input range.
  As such, it must be biased into its operating common
  mode range for practical single supply use. A new device,
  the LT1394, maintains the speed and application civility of
  its predecessor while including ground in its input operating range. Additionally, the new comparator is faster and
  pulls significantly lower operating current than the LT1016.
  This publication borrows shamelessly from earlier LTC
  efforts, while introducing new material.1 It approximates,
  affixes, appends, abridges, amends, abbreviates, abrogates, ameliorates and augments the previous work.2 …

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  Power Conditioning Techniques for Batteries &mdash AN8
  PDF, 708 Kb, Datei veröffentlicht: May 1, 1985
  A variety of approaches for power conditioning batteries is given. Switching and linear regulators and converters are shown, with attention to efficiency and low power operation. 14 circuits are presented with performance data.
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  Understanding and Applying Voltage References &mdash AN82
  PDF, 172 Kb, Datei veröffentlicht: Nov 1, 1999
  Just how do bandgaps and buried Zeners stack up against Weston cells? Did you know your circuit board may induce more drift in a reference than time and temperature? Learn the answers to these and other commonly asked reference questions ranging from burn-in recommendations to ΔVBE generation in this Application Note.
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  Application Note 82
  November 1999
  Understanding and Applying Voltage References 30
  2 4 20
  8 3
  10 –20
  16
  32 4
  –30 5 Today’s IC reference technology is divided along two
  lines: bandgap references, which balance the temperature coefficient of a forward-biased diode junction against
  that of a ∆VBE (see Appendix B); and buried Zeners (see
  Appendix A), which use subsurface breakdown to achieve
  outstanding long-term stability and low noise. With few
  exceptions, both reference types use additional on-chip
  circuitry to further minimize temperature drift and trim
  output voltage to an exact value. Bandgap references are
  generally used in systems of up to 12 bits; buried Zeners
  take over from there in higher accuracy systems.
  , LTC and LT are registered trademarks of Linear Technology Corporation. –1 5
  3
  2 64 6
  1 –40 As with other specialized electronic fields, the field of
  monolithic references has its own vocabulary. We’ve …

Konstruktionshinweise

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  Micropower, Single Supply Applications: (1) A Self-Biased, Buffered Reference (2) Megaohm Input Impedance Difference Amplifier &mdash DN23
  PDF, 199 Kb, Datei veröffentlicht: Jun 1, 1989
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  Micropower, Single Supply Applications:
  (1) A Self-Biased, Buffered Reference
  (2) Megaohm Input Impedance Difference Amplifier
  Design Note 23
  Walt Jung and George Erdi
  A Self-Biased, Buffered Reference
  Voltage reference circuits are common to precision analog
  designs, in a wide variety of forms. They can be either
  two or three terminal in basic configuration, and may or
  may not also provide buffering against line and/or load
  immunity. Micropower analog circuits are growing in both
  fashion as well as performance, and micropower voltage
  references have been available. However, it is not often
  that a micropower reference combines common features
  of very low DC errors, and line/load buffering. The circuit
  of Figure 1 is an unusual form of reference circuit, in that
  it achieves these goals.
  The leading virtue of this circuit lies in how it capitalizes
  on some key operating features for all of the devices used.
  First, the LTВ®1034, a 1.2V two terminal reference diode
  allows basic low TC micropower operation, by virtue of its (4V TO 9V)
  2
  3nA – 8 A …

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• Signal Conditioning > Voltage References > Shunt Voltage References | Micropower Voltage References