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TMS320F28375DPZP Datasheet(PDF) 107 Page - Texas Instruments |
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TMS320F28375DPZP Datasheet(HTML) 107 Page - Texas Instruments |
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107 / 226 page  (8) Any ADCs operating with heterogeneous ADCCLK, S+H durations, triggers, or resolution. (9) Value based on characterization. (10) I/O activity is minimized on pins adjacent to ADC input and VREFHI pins as part of best practices to reduce capacitive coupling and crosstalk. 8.10.1.2.5 ADCEXTSOC Timing Requirements MIN(1) MAX UNIT tw(INT) Pulse duration, INT input low/high Synchronous 2tc(SYSCLK) cycles With qualifier tw(IQSW) + tw(SP) + 1tc(SYSCLK) cycles (1) For an explanation of the input qualifier parameters, see Section 8.9.6.2.1. 8.10.1.2.6 ADC Input Models Note ADC channels ADCINA0, ADCINA1, and ADCINB1 have a 50-kΩ pulldown resistor to VSSA. For differential operation, the ADC input characteristics are given by Section 8.10.1.2.6.1 and Figure 8-33. 8.10.1.2.6.1 Differential Input Model Parameters DESCRIPTION VALUE (16-BIT MODE) Cp Parasitic input capacitance See Table 8-8 Ron Sampling switch resistance 700 Ω Ch Sampling capacitor 16.5 pF Rs Nominal source impedance 50 Ω ADC Ron Switch ADCINxN Ch Cp ADCINxP AC Rs Ron Switch Rs Cp VSSA Figure 8-33. Differential Input Model For single-ended operation, the ADC input characteristics are given by Section 8.10.1.2.6.2 Figure 8-34and . 8.10.1.2.6.2 Single-Ended Input Model Parameters DESCRIPTION VALUE (12-BIT MODE) Cp Parasitic input capacitance See Table 8-8 Ron Sampling switch resistance 425 Ω Ch Sampling capacitor 14.5 pF Rs Nominal source impedance 50 Ω ADC Ron Switch VREFLO Ch Cp ADCINx AC Rs Figure 8-34. Single-Ended Input Model www.ti.com TMS320F28379D, TMS320F28379D-Q1, TMS320F28378D, TMS320F28377D TMS320F28377D-Q1, TMS320F28376D, TMS320F28375D, TMS320F28374D SPRS880O – DECEMBER 2013 – REVISED FEBRUARY 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 107 Product Folder Links: TMS320F28379D TMS320F28379D-Q1 TMS320F28378D TMS320F28377D TMS320F28377D-Q1 TMS320F28376D TMS320F28375D TMS320F28374D |
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