C o n t e n t s

ADC with Configurable Filtering Adds Flexibility >>

High Speed ADC Portfolio Responds to Market Demands >>

High Performance ADC Dissipates Only 15 mW to Solve Heat Dissipation >>

Smallest SAR ADC Targets Space-Constrained Applications >>

ADC Selection Guide >>

ADC Selection Guide, continued >>

ADC with Integrated Quadrature Error Correction Minimizes Errors >>

Why Use an ADC Driver Amplifier? >>

Circuits from the Lab—Tested Design Resource >>

Buffer Enhances Clock Integrity to Enable Rated Performance from High Performance >>

Diff Amp Calculator Design Tool >>

All prices in this bulletin are in USD in quantities greater than 1000 (unless otherwise noted), recommended lowest grade resale, FOB U.S.A.

YOUR SEMICONDUCTOR SOLUTIONS RESOURCEVolume 10, Issue 2

ANALOG-TO-DIGITAL
CONVERTER AND DRIVER ICs

18-Bit, 2 MSPS, High Performance ADC Dissipates Only 15 mW to Solve Heat Dissipation in Dense Data Acquisition System Designs

Data acquisition system designers are frequently being asked to implement dense multichannel signal capture systems without the benefit of heat management circuitry because of the added noise, potential data corruption, cost, and space that this circuitry would introduce. These designers require data conversion components that do not sacrifice speed or performance to achieve the low power dissipation specifications needed.

Solution
The AD7986 18-bit, 2 MSPS ADC IC offers an industry-leading combination of 97 dB SNR performance, 15 mW power consumption, and small footprint. This combination of features allows designers to accommodate more high resolution data acquisition channels in smaller spaces and obviates the need for complex heat dissipation and cooling subsystems that consume resources and real estate. The performance and low power achieved by the AD7986 ADC also enable new generations of portable and battery-powered high resolution data acquisition systems.

AD7986 Features

  • 18-bit resolution with no missing codes
  • Throughput: 2 MSPS (TURBO = high),
    1.5 MSPS (TURBO = low)
  • Low power dissipation: 15 mW with
    external VREF, 26 mW with internal VREF
  • SNR: 97 dB with external VREF
  • 20-lead, 4 mm × 4mm LFCSP

Applications

  • Data acquisition systems
  • Medical instruments
  • Laboratory equipment

Smallest 12-Bit SAR ADC with Integrated Temperature Sensor Features 4 mm × 4 mm Package Size to Target Space-Constrained Applications

To meet today's industrial market environment, many data acquisition design engineers require multichannel data acquisition with added temperature sensing in space-constrained applications.

Solution
The AD7298 12-bit, 1 MSPS SAR ADC is the world's smallest 8-channel SPI interface ADC with internal temperature sensor and voltage reference. The device is housed in a very small 4 mm × 4 mm, 20-lead LFCSP.

The AD7298 is ideally suited for monitoring variables in a variety of systems, including telecommunications, as well as process and industrial control. This device offers more functionality per mm2 of package area than any similar converter device on the market. A 2.5 V 6 ppm/°C internal reference offers both accurate conversion and additional space-saving advantages. An on-board band gap temperature sensor digitizes temperature with a resolution of 0.25°C. On-board sequencer functionality allows multichannel preprogrammability, allowing conversion on a sequence of selected channels. A digital interface voltage range of 1.8 V to 3.6 V allows flexibility in its microprocessor interface.

AD7298

  • Multichannel data acquisition systems
  • Base station monitoring applications
  • Instrumentation and control

AD7298 Features

  • 12-bit, 1 MSPS throughput, 8-channel SAR ADC
  • Channel sequencer functionality
  • ±2°C internal temperature-to-digital sensor
  • Internal 2.5 V reference
  • 20-lead LFCSP
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