Preliminary Technical Data

ADCMP608/ADCMP609

Rev. PrA | Page 13 of 16

TIMING INFORMATION

Figure 24 illustrates the ADCMP608/ADCMP609 latch timing relationships. Table 6 provides definitions of the terms found in the figure.

1.1V

50%

50%

DIFFERENTIAL

INPUT VOLTAGE

LATCH ENABLE

Q OUTPUT

Q OUTPUT

Figure 24. System Timing Diagram

Table 6. Timing Descriptions

Symbol

Timing

Description

Input to output high

delay

Propagation delay measured from the time the input signal crosses the reference (± the input offset

voltage) to the 50% point of an output low-to-high transition.

Input to output low

delay

Propagation delay measured from the time the input signal crosses the reference (± the input offset

voltage) to the 50% point of an output high-to-low transition.

Latch enable to output

high delay

Propagation delay measured from the 50% point of the latch enable signal low-to-high transition to

the 50% point of an output low-to-high transition.

Latch enable to output

low delay

Propagation delay measured from the 50% point of the latch enable signal low-to-high transition to

the 50% point of an output high-to-low transition.

Minimum hold time

Minimum time after the negative transition of the latch enable signal that the input signal must

remain unchanged to be acquired and held at the outputs.

Minimum latch enable

pulse width

Minimum time that the latch enable signal must be high to acquire an input signal change.

Minimum setup time

Minimum time before the negative transition of the latch enable signal occurs that an input signal

change must be present to be acquired and held at the outputs.

Output rise time

Amount of time required to transition from a low to a high output as measured at the 20% and 80%

points.

Output fall time

Amount of time required to transition from a high to a low output as measured at the 20% and 80%

points.

Voltage overdrive