Datasheet Linear Technology LTC2351-14

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Design Notes

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  6-Channel SAR ADCs for Industrial Monitoring and Portable &mdash DN426
  PDF, 112 Kb, File published: Sep 14, 2007
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  6-Channel SAR ADCs for Industrial Monitoring and Portable
  Instruments
  Design Note 426
  Guy Hoover and Steve Logan
  The 14-bit LTC2351-14 is a 1.5Msps, low power SAR
  ADC with six simultaneously sampled differential input
  channels. It operates from a single 3V supply and features
  six independent sample-and-hold amplifiers and a single
  ADC. The single ADC with multiple S/HAs enables excellent
  range match (1mV) between channels and channel-tochannel skew (200ps).
  The versatile LTC2351-14 is ideally suited for industrial
  monitoring applications such as 3-phase power line
  monitoring to ensure line voltage compliance, portable
  power line instrumentation, power factor correction, motor control, and data acquisition. These applications may
  be battery powered, and it is here that the LTC2351-14’s low power and small size are desirable. Power consumption is a mere 16.5mW, which extends battery life. The
  3-wire serial interface means fewer pins than parallel
  output devices, allowing the LTC2351-14 to п¬Ѓt in a 32-pin,
  5mm Г— 5mm QFN package.
  Power Line Monitoring Application
  Figure 1 shows a typical power line monitoring application.
  Current is sensed by a CR Magnetics CR8348-2500-N
  current transformer. An LT1790-1.25 biases the output
  of the transformer to the middle of the LTC2351-14 input …

Articles

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  SAR ADCs Feature Speed, Low Power, Small Package Size and True Simultaneous Sampling &mdash LT Journal
  PDF, 197 Kb, File published: Jun 14, 2007
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  L DESIGN FEATURES SAR ADCs Feature Speed,
  Low Power, Small Package Size
  and True Simultaneous Sampling
  by Steve Logan and Atsushi Kawamoto Introduction
  When it comes to quickly digitizing
  analog signals from a few hertz to a few
  megahertz, successive approximation
  register (SAR) ADCs are the best choice
  for a broad range of applications. Their
  fast response and low latency make
  SAR ADCs ideal for single channel or
  multichannel data acquisition.
  Low power SAR ADCs are crucial as
  more designs migrate to lower supply
  voltages and tighter power budgets.
  Solution size is also a key requirement
  for designers needing a single snapshot
  of the input, as many low power SAR
  ADCs are used in portable or multichannel systems in which PCB space
  is limited. With designers trying to do
  more with less space, a small package
  becomes vital.
  As package size shrinks, it makes …

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Manufacturer's Classification

• Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Multi Channel ADCs | Simultaneous Sampling ADCs
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) ADCs