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Texas Instruments ADS8556/7/8 Analog-to-Digital Converters
Texas Instruments ADS8556/7/8 Analog-to-Digital Converters

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TI ADS8556/7/8 Analog-to-Digital Converters

Texas Instruments ADS855x Analog to Digital Converter family includes six low-power 16-, 14-, and 12-bit SAR ADCs with true bipolar inputs. Each channel of the TI ADS8556, ADS8557, and ADS8558 contains a sample-and-hold circuit that allows simultaneous high-speed multi-channel signal acquisition. These TI ADCs support data rates of up to 730kSPS in parallel interface mode or up to 500kSPS if the serial interface is used. The bus width of the parallel interface can be set to 8 or 16 bits. ADS8556, ADS8557, and ADS8558 are specified over the full industrial temperature range of -40ºC to +125ºC and are available in an LQFP-64 package.

This TI ADC family is ideal for use in power quality measurement, protection relays, multi-axis motor control, programmable logic controllers, and industrial data acquisition.

Features
  • Family of 16-, 14-, 12-Bit, Pin- and Software-Compatible ADCs
  • Six SAR ADCs Grouped in Three Pairs
  • Maximum Data Rate Per Channel with Internal Conversion Clock and Reference:
    • ADS8556: 630kSPS (PAR) or 450kSPS (SER)
    • ADS8557: 670kSPS (PAR) or 470kSPS (SER)
    • ADS8558: 730kSPS (PAR) or 500kSPS (SER)
  • Maximum Data Rate with External Conversion Clock and Reference:
    • 800kSPS (PAR) or 530kSPS (SER)
  • Pin-Selectable or Programmable Input Voltage Ranges: Up to ±12V
  • Excellent Signal-to-Noise Performance:
    • 91.5dB (ADS8556)
    • 85dB (ADS8557)
    • 73.9dB (ADS8558)
Applications
  • Power Quality Measurement
  • Protection Relays
  • Multi-Axis Motor Control
  • Programmable Logic Controllers
  • Industrial Data Acquisition
Part Number ADS8556 ADS8557 ADS8558
Resolution (Bits) 16 14 12
Sample Rate (max)(kSPS) 630 670 730
SINAD (dB) 89.5 84 73.8
SNR (dB) 91.5 85 73.9
SFDR (dB) 95 92 92

Block Diagram

Block Diagram
  • Texas Instruments
  • Semiconductors|IC-Data Conversion