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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

• Download
  A Single Supply RS232 Interface for Bipolar A to D Converters &mdash DN29
  PDF, 455 Kb, File published: Dec 1, 1989
  Extract from the document

  A Single Supply RS232 Interface for Bipolar A to D Converters
  Design Note 29
  Sean Gold
  system. Construction also requires close attention to the
  layout of the system grounds and other aspects of circuit
  board design to avoid noise problems.2 Designing circuitry for single supply operation is often an
  attractive simplification for reducing production costs. Yet
  many applications call for just a few additional supplies to
  solve simple interface problems. The example presented
  here describes how an advanced RS232 interface can simplify an A to D converter which processes bipolar signals. To accommodate bipolar inputs (–5 < VIN < 5), the
  LTC1094’s negative rail must be biased beyond the extreme
  signal swing, but below absolute maximum ratings for
  supplies. A 5.6V Zener diode, D1, provides a sufficient
  bias because the V– pin draws very little current. The LT®1180 RS232 transceiver includes a charge pump
  which produces low ripple supplies with sufficient surplus
  current to drive a CMOS A to D converter and precision
  voltage reference. The circuit in Figure 1 operates from
  a single 5V supply, and draws a total quiescent current
  of only 37mA. These features make the circuit ideal for
  applications which must process bipolar signals with
  minimal support electronics. The A to D converter communicates with a remote controller via three wires, which carry the clock, the configuration
  word, and the output data. The chip select signal, CS, is
  generated from the incoming clock with a peak detector, …

Model Line

Manufacturer's Classification

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

Other Names:

LTC1094CNPBF, LTC1094CN PBF