3.3V, 8-Bit, Programmable Timing Element

6

______________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (DS1123L-100)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Delay

(Notes 3, 4)

18

22

ns

Delay Step Size

0

1

2.25

ns

Step-Zero Delay with Respect

to IN

(Notes 4, 5)

16.5

22

ns

Step-Zero Delay with Respect

to REF

(Notes 6, 7)

-2.5

-1.5

0

ns

Maximum Delay with Respect

to IN

(Notes 4, 8)

272

ns

Delay with Respect to REF

Position FF (Notes 7, 9)

255

ns

Delay with Respect to REF

Tolerance

(Notes 7, 9)

-0.75

+0.75

%

Voltage Delay Variation

(Notes 7, 9)

-0.5

+0.5

%

Temperature Delay Variation

-2.5

+2.5

%

Integral Nonlinearity (Deviation

from Straight Line)

(Note 10)

-4

0

+4

ns

OUT Delta Delay

(Note 11)

0

1

2.5

ns

IN High to PWM High

(Notes 4, 12)

16.5

22

ns

Minimum PWM Output Pulse

Width

(Note 13)

5

ns

Minimum Input Pulse Width

(Note 14)

40

ns

Minimum Input Period

(Note 15)

80

ns

Input Rise and Fall Times

(Note 16)

0

1

µs

Note 1:

All voltages are referenced to ground.

Note 2:

If IN is high during power-up, the output remains low until IN is toggled low and back high again.

Note 3:

The reference delay is closely matched to the step-zero delay to allow relative timings down to zero or less.

Note 4:

Note 5:

Delay from input to output with a programmed delay value of zero.

Note 6:

This is the relative delay between REF and OUT. The device is designed such that when programmed to zero delay the

Note 7:

From rising edge to rising edge.

Note 8:

This is the actual measured delay from IN to OUT. This parameter exhibits greater temperature variation than the relative

delay parameter.

Note 9:

This is the actual measured delay with respect to the REF output. This parameter more closely reflects the programmed

delay value than the absolute delay parameter (see Figure 8). Typical delay shift due to aging is within ±0.85%. Aging

stressing includes level 1 moisture reflow preconditioning (24hr +125°C bake, 168hr +85°C/85%RH moisture soak, and

ased +150°C bake, and 1000 temperature cycles at -55°C to +125°C.

Δt

t

DREF

DREF

Δt

t

DV

DREF

Δt

t

DT

DREF