DM3725 datasheet(141/268 Pages) TI

141 / 268 page

DPLL_MPU

DPLL_CORE

DLL

DPLL5

DPLL4

vdda_dplls_dll

vdda_dpll_per

Noise Filter

030-017

DPLL_IVA

DM3730, DM3725

www.ti.com

SPRS685 – AUGUST 2010

4.3.3

DPLL and DLL Noise Isolation

The noise filters (decoupling capacitors) are required to suppress the switching noise generated by high

frequency and to stabilize the supply voltage.

A noise filter is most effective when it is close to the device, because this minimizes the inductance of the

circuit board wiring and interconnects.

Figure 4-8 illustrates an example of a noise filter.

This circuit is provided only as an example.

The filter must be located as close as possible to the device.

Figure 4-8. DPLL Noise Filter

Table 4-17 specifies the noise filter requirements.

Table 4-17. DPLL Noise Filter Requirements(1)

NAME

MIN

TYP

MAX

UNIT

Filtering capacitor

100

150

(1)

For more information, see IO and Analog Voltage Decoupling Characteristics.

4.3.4

Processor Clocks

Table 4-18 through Table 4-20 show the clocks AC performance values.

Table 4-18. Processor Voltages Without SmartReflexTM

RETENTIO

OPP50

OPP100

OPP130(4)

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

VDD1(1) (2)

0.8

0.92

0.97

1.02

1.08

1.14

1.2

1.21

1.27

1.33

(3) (V)

Clock Specifications

141

Submit Documentation Feedback

Product Folder Link(s): DM3730 DM3725

DM3725 Datasheet(PDF) 141 Page - Texas Instruments

DM3725 Datasheet(HTML) 141 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL