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Application Notes

• Download
  Data Acquisition Circuit Collection &mdash AN62
  PDF, 349 Kb, File published: 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.
  Extract from the document

  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 . …

Design Notes

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  New 500ksps and 600ksps ADCs Match Needs of High Speed Applications &mdash DN88
  PDF, 88 Kb, File published: Nov 1, 1994
  Extract from the document

  500ksps and 600ksps ADCs Match Needs of
  High Speed Applications – Design Note 88
  Kevin R. Hoskins Power Shutdown: 5mW Wakes Up in a Scant 300ns Single 5V or В±5V Supply Voltage Operation Low Power Dissipation: 150mW (Max), 75mW (Typ) Small 24-Pin SO or 24-Pin Narrow DIP Packages
  The LTC1278/LTC1279’s DC performance includes
  В±1LSB INL and DNL, no missing codes, and an internal
  voltage reference with a full-scale drift of only 25ppm/В°C.
  The AC performance includes 70dB (Min) SINAD,
  –78dB (Max) THD, and –82dB (Max) spurious-free
  dynamic range. These specifications were measured
  at fS = 500ksps (LTC1278) or fS = 600ksps (LTC1279),
  fIN = 100kHz, and are guaranteed over the operating
  temperature range. The plot of effective-number-of-bits
  (ENOB) shown in Figure 1 clearly indicates that the
  LTC1278/LTC1279 can accurately sample signals that
  contain spectral energy beyond the Nyquist frequency.
  Newest High Speed ADC Family Members
  The LTC1278/LTC1279 are self-contained ADC systems
  composed of a fast capacitively-based charge redistribution Successive Approximation Register (SAR)
  sampling ADC, internal reference, power shutdown,
  and internally generated and synchronized conversion
  11/94/88_conv 74
  68 12
  11 62 10 …

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Manufacturer's Classification

• Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Single Channel ADCs