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AM3703CUS Datasheet(PDF) 126 Page - Texas Instruments |
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AM3703CUS Datasheet(HTML) 126 Page - Texas Instruments |
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126 / 280 page  AM3715, AM3703 SPRS616F – JUNE 2010 – REVISED AUGUST 2011 www.ti.com 3.4 External Capacitors To improve module performance, decoupling capacitors are required to suppress the switching noise generated by high frequency and to stabilize the supply voltage. A decoupling capacitor is most effective when it is close to the device, because this minimizes the inductance of the circuit board wiring and interconnects. 3.4.1 Voltage Decoupling Capacitors Table 3-6 summarizes the Core voltage decoupling characteristics. 3.4.1.1 Core Voltage Decoupling Capacitors To improve module performance, decoupling capacitors are required to suppress the switching noise generated by high frequency and to stabilize the supply voltage. A decoupling capacitor is most effective when it is close to the device, because this minimizes the inductance of the circuit board wiring and interconnects. Table 3-6. Core Voltage Decoupling Characteristics PARAMETER MIN TYP MAX UNIT Cvdd_core (1) 0.6 1.2 1.8 μF Cvdd_mpu_iva (2) See (2) μF (1) The typical value corresponds to 2 capacitors of 470 nF, plus 3 capacitors of 100 nF. Except for the decoupling capacitance values, the PCB rules of the PCB Design Requirements for VDD_MPU_IVA Power Distribution Network for TI OMAP3630, AM37xx, and DM37xx Microprocessors (SPRABJ7) application note can be used. (2) For more information regarding the vdd_mpu_iva decoupling capacitance recommendations, see the PCB Design Requirements for VDD_MPU_IVA Power Distribution Network for TI OMAP3630, AM37xx, and DM37xx Microprocessors (SPRABJ7) application note. (3) IVA functionality is not supported in the AM37xx device. 3.4.1.2 IO and Analog Voltage Decoupling Capacitors Table 3-7 summarizes the power supply decoupling capacitor characteristics. Table 3-7. Power Supply Decoupling Capacitor Characteristics PARAMETER MIN TYP MAX UNIT Cvdds (1)(2) 200 400 600 nF Cvdds_mem (1)(3) 350 700 1050 nF Cvdds_mmc1 (4) 50 100 150 nF Cvdds_x (4) 50 100 150 nF Cvdda_dplls_dll (4) 50 100 150 nF Cvdda_dpll_per (4) 50 100 150 nF Cvdds_sram (4) 110 220 330 nF Cvdda_wkup_bg_bb (4) 240 470 700 nF Cvdda_dac (4) 50 100 150 nF (1) In power plan configuration. (2) The typical value corresponds to 4 capacitors of 100 nF. (3) The typical value corresponds to 7 capacitors of 100 nF. (4) In power rail configuration. 126 Electrical Characteristics Copyright © 2010–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): AM3715 AM3703 |
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