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LT1167-1

Application Notes

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  Linear Technology Magazine Circuit Collection, Volume V: Data Conversion, Interface and Signal Conditioning Products &mdash AN87
  PDF, 1.5 Мб, Файл опубликован: 1 ноя 2000
  Application Note 87 is the fifth in a series that excerpts useful circuits from Linear Technology magazine. Data conversion, interface and signal conditioning circuits from issue VI:1 (February 1996) through issue VIII:4 (November 1998) are featured. Like its predecessor, AN67, this Application Note includes circuits for high speed video, interface and hot swap circuits, active RC and switched capacitor filter circuitry and a variety of data conversion and instrumentation circuits. All circuits are conveniently indexed by type.
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  Application Note 87
  November 2000 Linear Technology Magazine Circuit Collection, Volume V
  Data Conversion, Interface and Signal Conditioning Products
  Richard Markell, Editor
  INTRODUCTION
  Application Note 87 is the fifth in a series that excerpts
  useful circuits from Linear Technology magazine to preserve them for posterity. This application note highlights
  data conversion, interface and signal conditioning circuits
  from issue VI:1 (February 1996) through issue VIII:4
  (November 1998). Like its predecessor, AN67, this Application Note includes circuits for high speed video, interface and hot swap circuits, active RC and switched capacitor filter circuitry and a variety of data conversion and instrumentation circuits. There are also several circuits
  that cannot be so neatly categorized. So, without further
  ado, I’ll let the authors describe their circuits.
  Note: Article Titles appear in this application note exactly
  as they originally appeared in Linear Technology magazine. This may result in some inconsistency in the usage
  of terminology. TABLE OF CONTENTS
  Introduction . 1
  DATA CONVERTERS
  The LTC®1446 and LTC1446L: World’s First Dual 12-Bit DACs in SO-8 Packages . 3
  Multichannel A/D Uses a Single Antialiasing Filter. 4
  LTC1454/54L and LTC1458/58L: Dual and Quad 12-Bit, Rail-to-Rail, Micropower DACs . 5
  Micropower ADC and DAC in SO-8 Give PC 12-Bit Analog Interface . 7
  The LTC1594 and LTC1598: Micropower 4-and 8-Channel 12-Bit ADCs . 10
  MUX the LTC1419 Without Software . 13 …

Design Notes

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  The LT1167: Single Resistor Sets the Gain of the Best Instrumentation Amplifier &mdash DN182
  PDF, 87 Кб, Файл опубликован: 1 июн 1998
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  The LT1167: Single Resistor Sets the Gain of the Best
  Instrumentation Amplifier – Design Note 182
  Alexander Strong and Kevin R. Hoskins
  Introduction
  Linear Technology’s next generation LT®1167 instrumentation amplifier uses a single resistor to set gains
  from 1 to 10,000. The single gain-set resistor eliminates
  expensive resistor arrays and improves VOS and CMRR
  performance. Careful attention to circuit design and
  layout, combined with laser trimming, greatly enhances
  the CMRR, PSRR, gain error and nonlinearity, maximizing application versatility. The CMRR is guaranteed to
  be greater than 90dB when the LT1167’s gain is set at
  1. Total input offset voltage (VOS) is less than 60ОјV at a
  gain of 10. For gains in the range of 1 to 100, gain error
  is less than 0.05%, making the gain-set resistor tolerance the dominant source of gain error. The LT1167’s
  gain nonlinearity is unsurpassed when compared to
  other monolithic solutions. It is specified at less than
  40ppm when operating at a gain of 1000 while driving
  a 2kО© load. The LT1167 is so robust that it can drive
  600Ω loads without a significant linearity penalty. These
  parametric improvements result in an overall gain error
  that remains unchanged over the entire input common
  mode range and is not degraded by supply perturbations
  or varying load conditions. The LT1167 can operate over …

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  Resolving Very Small Temperature Differences with the LTC2402 &mdash DN257
  PDF, 75 Кб, Файл опубликован: 2 май 2001
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  Resolving Very Small Temperature Differences
  with the LTC2402 – Design Note 257
  Derek Redmayne
  The LTC В®2402, a 2-channel 24-bit, No Latency
  Delta-Sigmaв„ў ADC, is well-suited to differential
  temperature sensing using a number of different
  sensors. Extremely good matching between channels
  allows two absolute temperature measurements to
  be compared in order to determine the differential or
  gradient between two points. In the circuits shown
  below, the LTC2402, with averaging, can resolve a
  temperature differential of a few millidegrees, although
  in the case of a single-shot pair of readings, a peak error
  of 0.05В°C is possible. Independently adjustable full-scale
  (FSSET ) and zero-scale (ZSSET ) facilitate 3-or 4-wire
  measurements with platinum RTDs and the automatic
  sequencing of the two channels makes measurements
  across an isolation barrier easier. The no latency feature
  of these ADCs also resolves dilemmas associated
  with pulsed excitation. The use of pulsed excitation
  minimizes or eliminates parasitic thermocouple effects
  that can compromise RTD measurements. In addition,
  pulsed excitation can reduce standby or average power …

Статьи

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  Designing the LT1167 Instrumentation Amplifier into a Single 5V Supply Application &mdash LT Journal
  PDF, 119 Кб, Файл опубликован: 1 июн 1999
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  DESIGN IDEAS Designing the LT1167
  by Adolfo A. Garcia
  Instrumentation Amplifier
  into a Single 5V Supply Application
  Introduction Circuit Operation
  operate near the sensor or circuit’s
  positive supply voltage or ground
  (common). Even though the signal
  conditioning circuitry need not operate at the extremes of the supply
  voltage range, the output voltage swing
  of the circuit should be as large as
  possible for maximum dynamic range.
  The circuit illustrated in Figure 1
  achieves high precision performance
  while operating from a single 5V
  supply. The trick here is to reference
  the dual-supply instrumentation
  amplifier’s inputs to a stable midpoint supply and then follow the
  instrumentation amplifier with a
  single-supply precision operational
  amplifier with a rail-to-rail output
  stage. This “composite” instrumentation amplifier uses an LT1167 (a high
  performance instrumentation amplifier in an SO-8 package) for the input …

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  The LT1167: Precision, Low Cost, Low Power Instrumentation Amplifier Requires a Single Gain-Set Resistor &mdash LT Journal
  PDF, 294 Кб, Файл опубликован: 1 май 1998
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  DESIGN FEATURES The LT1167: Precision, Low Cost,
  Low Power Instrumentation Amplifier
  Requires a Single Gain-Set Resistor
  by Alexander Strong
  Introduction Input Protection The LT1167 is the next-generation
  instrumentation amplifier designed
  to replace the previous generation of
  monolithic instrumentation amps, as
  well as discrete, multiple op amp
  solutions. Instrumentation amplifiers differ from operational amplifiers
  in that they can amplify input signals
  that are not ground referenced. The
  output of an instrumentation amplifier is referenced to an external voltage
  that is independent of the input. Conversely, the output voltage of an op
  amp, due to the nature of its feedback, is referenced to the differential
  and common mode input voltage.
  A separate ground reference and
  the high CMRR of the LT1167 instrumentation amplifier reduce the effect
  of the input common mode voltage on
  the output signal. The closed-loop
  gain of an op amp and of most instrumentation amps is set by a resistor
  ratio; the gain of the LT1167 is set by
  the absolute value of one external …

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  New Instrumentation Amplifier: Single-Resistor Gain Set and Precision Front End Make Accuracy Easy &mdash LT Journal
  PDF, 159 Кб, Файл опубликован: 1 май 2000
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  DESIGN FEATURES New Instrumentation Amplifier: SingleResistor Gain Set and Precision Front
  End Make Accuracy Easy
  by Glen Brisebois
  The LT1168 is a low power,
  single-resistor gain-programmable
  instrumentation amplifier that is easy
  to apply. It is a pin-compatible upgrade
  for the AD620 (and the INA118 with a
  resistor-value change) and is available in C and I grades. With negligible
  60µV (Max) offset voltage and ultrahigh 1TΩ input impedance, it can
  sense bridges with source impedances
  from 10Ω to 100k without degrading
  the signal. Its 120dB CMRR at 60Hz
  (AV = 100V) is achieved even with a 1k
  source impedance imbalance. Matching the LT1168’s CMRR using discrete
  op amps would require the use of
  0.001% resistors. The LT1168’s
  robust inputs meet IEC1000-4-2
  Level 4 ESD tests with the addition of
  two external 5k series resistors. These
  5k resistors will contribute only a
  negligible 6ВµV of DC error. Table 1. Examples of series resistors for precision gain Desired Gain RG
  (Theoretical) RG1 …

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  Small, Portable Altimeter Operates from a Single Cell &mdash LT Journal
  PDF, 44 Кб, Файл опубликован: 1 май 2002
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  DESIGN IDEAS Small, Portable Altimeter Operates
  from a Single Cell
  by Todd Owen
  free descent—limited by the engineer's
  parasitic drag—to 3000ft. Subsequent
  deployment of an aerodynamic decelerator (Precision Aerodynamics Icarus
  Omega 190) prevented engineer injury or circuit damage. Aircraft rental
  for testing is available at many local
  airports. Extensive instruction in free
  descent and the use of aerodynamic
  decelerators are highly recommended
  before undertaking testing of this
  nature. Contact USPA at (703) 8363495 for further information. –5V
  D2 10ВµF 10ВµF D1 + Linear Technology Magazine May 2002 R2 performs gain calibration in the
  signal-conditioning circuitry. This
  potentiometer calibrates out any normal variations in part tolerances and
  sets the altimeter for a 100mV change
  in output for every 1000ft of altitude.
  The circuit has some initial offset, as
  well as an offset that is determined by
  barometric pressure variations. You
  can use R3 to R5 to null this offset,
  giving a 0V to 1V output for 0ft to …

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Классификация производителя

• Signal Conditioning > Amplifiers > Instrumentation Amplifiers
• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Voltage Amplifiers (>12V) | Low Noise Amplifiers (