Successive-approximation-register ADC comes with fully documented SPICE model
May 22, 2012 // Julien Happich
Texas Instruments introduced a successive-approximation-register (SAR) analog-to-digital converter (ADC) with a downloadable TINA-TI SPICE model
This enables system designers to simulate and characterize the full analog signal chain in software for the first time. The model is available for the new 12-bit, 1-MSPS, 8-channel ADS8028, a highly-integrated SAR ADC featuring a low-drift internal voltage reference, wide external analog voltage reference range, wide analog and digital supply ranges, and an internal temperature sensor.
Designers could previously only simulate, model and test up to the SAR ADC, requiring them to invest time and resources building the ADC circuit in hardware. With a downloadable TINA-TI SPICE model available for all new SAR ADCs, designers will be able to fully verify ADC driving circuitry, enabling them to speed product development. The ADS8028 integrates an internal 2.5-V reference, ±1ºC accurate temperature sensor and internal multiplexer with sequencer; it also eliminates the need for an external decoupling capacitor. It operates from an analog supply range of 2.7 to 5.25V and draws a maximum of 36 microWatts in power-down mode across a wide operating temperature range of -40 to 125ºC. In addition to the TINA-TI SPICE model, an IBIS model is available to verify board signal integrity requirements. The ADS8028 is available today in a 4x4mm QFN.
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