ISL267817

12-Bit Differential Input 200kSPS SAR ADC

Product Status: Mass Production

OVERVIEW

The ISL267817 is a 12-bit, 200kSPS sampling SAR-type ADC which features excellent linearity over supply and temperature variations, and provides a drop-in compatible alternative to all ADS7817 performance grades. The robust, fully-differential input offers high impedance to minimize errors due to leakage currents, and the specified measurement accuracy is maintained with input signals up to the supply rails.
The reference accepts inputs between 0.1V to 2.5V, providing design flexibility in a wide variety of applications. The ISL267817 also features up to 8kV Human Body Model ESD survivability.
The serial digital interface is SPI compatible and is easily interfaced to popular FPGAs and microcontrollers. Operating from a 5V supply, power dissipation is 2.15mW at a sampling rate of 200kSPS, and just 25µW between conversions utilizing the Auto Power-Down mode, making the ISL267817 an excellent solution for remote industrial sensors and battery-powered instruments. It is available in the compact, industry-standard 8 Lead SOIC and MSOP packages and is specified for operation over the industrial temperature range (-40°C to +85°C).

KEY FEATURES

  • Drop-In Compatible with ADS7817 (All Performance Grades)
  • Differential Input
  • Simple SPI-compatible Serial Digital Interface
  • Guaranteed No Missing Codes
  • 200kHz Sampling Rate
  • +4.75V to +5.25V Supply
  • Low 2.15mW Operating Power (200kSPS)
  • Power-down Current between Conversions: 3µA
  • Excellent Differential Non-Linearity (1.0LSB max)
  • Low THD: -85dB (typ)
  • Pb-Free (RoHS Compliant)
  • Available in SOIC and MSOP Packages

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL267817
Basic Information
Production Status
Mass Production
# of Devices/ Channels
1
Resolution Bits
12
Max Conversion Rate (kSPS)
200
Integral NonLinearity LSB
1
Differential NonLinearity LSB
1
SINAD (dbFS)
71
SFDR in dBs
-85 dB
Power Consumption (mW)
2.15
Analog Supply Voltage Min (V)
4.75
Analog Supply Voltage Max (V)
5.25
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +85

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