AM3703CUS datasheet(126/280 Pages) TI

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

Cvdds_mem

(1)(3)

350

700

1050

Cvdds_mmc1

(4)

100

150

Cvdds_x

(4)

100

150

Cvdda_dplls_dll

(4)

100

150

Cvdda_dpll_per

(4)

100

150

Cvdds_sram

(4)

110

220

330

Cvdda_wkup_bg_bb

(4)

240

470

700

Cvdda_dac

(4)

100

150

(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

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