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ADC12DJ3200AAV Datasheet(PDF) 10 Page - Texas Instruments |
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ADC12DJ3200AAV Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 111 page  10 ADC12DJ3200 SLVSD97 – MAY 2017 www.ti.com Product Folder Links: ADC12DJ3200 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. NOTE Power down of the high speed data outputs (DA0+/– ... DA7+/–, DB0+/– ... DB7+/–) for extended times may reduce performance of the output serializers, especially at high data rates. Power down of the serializers occurs when the PD pin is held high, the MODE register is programmed to a value other than 0x00 or 0x01, PD_ACH or PD_BCH registers settings are programmed to 1 or when the JMODE register setting is programmed to a mode that uses less than the 16 total lanes the device allows. For instance, JMODE 0 uses eight total lanes and therefore the four highest indexed lanes for each JESD204B link (DA4+/– ... DA7+/–, DB4+/– ... DB7+/–) are powered down in this mode. When the PD pin is held high or the MODE register is programmed to a value other than 0x00 or 0x01 then all of the output serializers are powered down. When PD_ACH or PD_BCH register settings are programmed to 1 the associated ADC channel and lanes are powered down. To prevent unreliable operation the PD pin and MODE register should only be used for brief periods of time to measure temperature diode offsets and not used for long-term power savings. Further, use of a JMODE that uses fewer than 16 lanes will result in unreliable operation of the unused lanes. If the system will never use the unused lanes during the lifetime of the device then the unused lanes will not cause issues and can be powered down. If the system may make use of the unused lanes at a later time, the reliable operation of the serializer outputs can be maintained by enabling JEXTRA_A and JEXTRA_B which results in VD11 power consumption to increase and the output serializers to toggle. 6.4 Thermal Information THERMAL METRIC(1) ADC12DJ3200 UNIT AAV (FCBGA) 144 PINS RθJA Junction-to-ambient thermal resistance 25.3 °C/W RθJC(top) Junction-to-case (top) thermal resistance 1.1 °C/W RθJB Junction-to-board thermal resistance 8.2 °C/W ψJT Junction-to-top characterization parameter 0.1 °C/W ψJB Junction-to-board characterization parameter 8.2 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance n/a °C/W |
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