REV. B

–3–

AD7755

Parameter

A Version

B Version

Unit

Test Conditions/Comments

POWER SUPPLY

For Specified Performance

4.75

4.75

V min

5 V – 5%

5.25

5.25

V max

5 V + 5%

4.75

4.75

V min

5 V – 5%

5.25

5.25

V max

5 V + 5%

3

3

mA max

Typically 2 mA

2.5

2.5

mA max

Typically 1.5 mA

NOTES

Specifications subject to change without notice.

Parameter

A, B Versions

Unit

Test Conditions/Comments

3

275

ms

F1 and F2 Pulsewidth (Logic Low)

See Table III

sec

Output Pulse Period. See Transfer Function Section

sec

Time Between F1 Falling Edge and F2 Falling Edge

3, 4

90

ms

CF Pulsewidth (Logic High)

See Table IV

sec

CF Pulse Period. See Transfer Function Section

CLKIN/4

sec

Minimum Time Between F1 and F2 Pulse

NOTES

µs in the high frequency mode. See Frequency Outputs section and Table IV.

Specifications subject to change without notice.

ORDERING GUIDE

Model

Package Description

Package Options

AD7755AAN

Plastic DIP

N-24

AD7755AARS

Shrink Small Outline Package

RS-24

AD7755ABRS

Shrink Small Outline Package

RS-24

EVAL-AD7755EB

AD7755 Evaluation Board

AD7755AAN-REF AD7755 Reference Design PCB (See AN-559)

F1

F2

CF

Figure 1. Timing Diagram for Frequency Outputs

OBSOLETE