AM3703 datasheet(158/280 Pages) TI

158 / 280 page

SWPS038-013

Tn–1

Tn+1

AM3715, AM3703

SPRS616F

– JUNE 2010 – REVISED AUGUST 2011

www.ti.com

Timing Requirements and Switching Characteristics

6.1

Timing Test Conditions

All timing requirements and switching characteristics are valid over the recommended operating conditions

unless otherwise specified.

6.2

Interface Clock Specifications

6.2.1

Interface Clock Terminology

The interface clock is used at the system level to sequence the data and/or to control transfers accordingly

with the interface protocol.

6.2.2

Interface Clock Frequency

The two interface clock characteristics are:

•

The maximum clock frequency

•

The maximum operating frequency

The interface clock frequency documented in this document is the maximum clock frequency, which

corresponds to the maximum frequency programmable on this output clock. This frequency defines the

maximum limit supported by the device IC and doesn

’t take into account any system consideration (PCB,

Peripherals).

The system designer will have to consider these system considerations and the device IC timing

characteristics as well, to define properly the maximum operating frequency, which corresponds to the

maximum frequency supported to transfer the data on this interface.

6.2.3

Clock Jitter Specifications

Jitter is a phase noise, which may alter different characteristics of a clock signal. The jitter specified in this

document is the time difference between the typical cycle period and the actual cycle period affected by

noise sources on the clock. The cycle (or period) jitter terminology will be used to identify this type of jitter.

Figure 6-1. Cycle (or Period) Jitter

NOTE

Max. Cycle Jitter = Max (Ti)

Min. Cycle Jitter = Min (Ti)

Jitter Standard Deviation (or RMS Jitter) = Standard Deviation (Ti)

6.2.4

Clock Duty Cycle Error

The maximum duty cycle error is the difference between the absolute value of the maximum high-level

pulse duration or the maximum low-level pulse duration and the typical pulse duration value.

•

Maximum pulse duration = Typical pulse duration + maximum duty cycle error

•

Minimum pulse duration = Typical pulse duration - maximum duty cycle error

158

Timing Requirements and Switching Characteristics

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