Texas Instruments introduces simultaneous sampling ADCs for power quality management, power protection and motor control applications

SAR analog-to-digital converter offers 3.5 dB-better SNR and more than twice the sampling rate of competitive devices

Bangalore (October 15, 2009) — Texas Instruments Incorporated (TI) introduced today a family of 16-, 14- and 12-bit simultaneous sampling successive approximation register (SAR) analog-to-digital converters (ADCs) with high-voltage inputs. The ADS8556, ADS8557 and ADS8558 offer a sampling range of 730 kSPS and signal-to-noise ratio (SNR) up to 91.5 dB, and include the industry’s only simultaneous sampling ADC that offers true, 16-bit no missing codes (NMC) performance. The new ADCs allow designers to maximize performance when connecting to a wide range of inputs or sensor types in applications including multi-axis motor control, simultaneous data acquisition, robotics, power quality management and power protection. For product details see: www.ti.com/ads8556-pr

Key features and benefits

• SNR of 91.5 db (typical) is up to 3.5 db better than the competition, for higher resolution of dynamic range signals; sampling rate of 730 kSPS per channel is more than twice that of the closest competitor
• ADS8556 (16-bit) 91.5 SNR; 2x faster
• ADS8557 (14- bit) 85 SNR; 2.5x faster
• o ADS8558 (12-bit) 73.9 SNR; ~3x faster
• True bipolar inputs with software-selectable input ranges up to ±12 V allow easy connectivity to a wide range of inputs and sensors
• Low power dissipation of 298.5 mW at maximum data rate; 150 mW at 250 kSPS
• Excellent performance and external conversion for multiple device synchronization, resulting in flexible and expandable systems
• The device’s performance is maximized when used with TI’s low-noise operational amplifiers: the low-noise, high-precision OPA827 featuring a FET input for high-impedance output sources; and the OPA211, TI’s low-power, lowest noise ±18-V op amp. These ADCs work well with many microcontrollers and embedded controllers, including TI's TMS320F2812.

Find out more about TI’s high-performance ADCs by visiting the links below:

• Order ADS855x samples at  www.ti.com/ads8556-pr
• Quickly search TI’s entire data converter portfolio or download the latest selection guide: www.ti.com/dataconverters-pr
• View TI Senior Application Engineer Bonnie Baker’s video “Analog Tutorial – The Basics of Effective Number of Bits” at www.ti.com/bitselection-pr
• Ask questions and share knowledge on TI’s E2E online community: http://www.ti.com/e2e-pr

About Texas Instruments

Texas Instruments (NYSE: TXN) helps customers solve problems and develop new electronics that make the world smarter, healthier, safer, greener and more fun. A global semiconductor company, TI innovates through manufacturing, design and sales operations in more than 30 countries. For more information, go to www.ti.com

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