Overview

Features and Benefits

  • 1.5Msps ADC with 6 Simultaneously Sampled Differential Inputs
  • 250ksps Throughput per Channel
  • 72dB SINAD
  • Low Power Dissipation: 16.5mW
  • 3V Single Supply Operation
  • 2.5V Internal Bandgap Reference, Can be Overdriven with External Reference
  • 3-Wire SPI-Compatible Serial Interface
  • Internal Conversion Triggered by CONV
  • SLEEP (12µW) Shutdown Mode
  • NAP (4.5mW) Shutdown Mode
  • 0V to 2.5V Unipolar, or ±1.25V Bipolar Differential Input Range
  • 83dB Common Mode Rejection
  • Tiny 32-Pin (5mm × 5mm) QFN Package

Product Details

The LTC2351-12 is a 12-bit, 1.5Msps ADC with six simultaneously sampled differential inputs. The device draws only 5.5mA from a single 3V supply, and comes in a tiny 32-pin (5mm × 5mm) QFN package. A SLEEP shutdown mode further reduces power consumption to 12µW. The combination of low power and tiny package makes the LTC2351-12 suitable for portable applications.

The LTC2351-12 contains six separate differential inputs that are sampled simultaneously on the rising edge of the CONV signal. These six sampled inputs are then converted at a rate of 250ksps per channel.

The 83dB common mode rejection allows users to eliminate ground loops and common mode noise by measuring signals differentially from the source.

The device converts 0V to 2.5V unipolar inputs differentially, or ±1.25V bipolar inputs also differentially, depending on the state of the BIP pin. Any analog input may swing rail-to-rail as long as the differential input range is maintained.

The conversion sequence can be abbreviated to convert fewer than six channels, depending on the logic state of the SEL2, SEL1 and SEL0 inputs.

The serial interface sends out the six conversion results in 96 clocks for compatibility with standard serial interfaces.

Bits
LTC2351-12 12
LTC2351-14 14

Applications

  • Multiphase Power Measurement
  • Multiphase Motor Control
  • Data Acquisition Systems
  • Uninterruptable Power Supplies

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Software & Systems Requirements

Evaluation Software

LinearLab Tools

A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards.

Product Recommendations

LTC2351-12 Companion Parts

Recommended µModule Isolator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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