AD7740

REV. A

–3–

(VDD = 3.0 V to 3.6 V, 4.75 V to 5.25 V, GND = O V, REFIN = 2.5 V)

Parameter

VDD = 3.0 V to 3.6 V

VDD = 4.75 V to 5.25 V

Unit

Conditions/Comments

32

32

kHz min

Clock Frequency

1

1

MHz max

40:60

40:60

min

Clock Mark/Space Ratio

60:40

60:40

max

50

35

ns typ

CLKIN Edge to FOUT Edge Delay

2.3

1.8

ns typ

FOUT Rise Time

1.6

1.4

ns typ

FOUT Fall Time

±20

±8

ns typ

FOUT Pulsewidth

NOTES

Specifications subject to change without notice.

CLKIN

FOUT

Figure 1. Timing Diagram

ABSOLUTE MAXIMUM RATINGS

*

°C unless otherwise noted)

VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

Logic Input Voltage to GND . . . . . . . . –0.3 V to VDD + 0.3 V

FOUT Voltage to GND . . . . . . . . . . . –0.3 V to VDD + 0.3 V

Operating Temperature Range

Commercial (K Version) . . . . . . . . . . . . . . . . 0

°C to +85°C

Automotive (Y Version) . . . . . . . . . . . . . . –40

°C to +105°C

Storage Temperature Range . . . . . . . . . . . . –65

°C to +150°C

°C

SOT-23 Package

θ

JA

Lead Temperature (10 secs) . . . . . . . . . . . . . . . . . . 300

°C

Reflow Soldering

Peak Temperature . . . . . . . . . . . . . . . . . . . . 220 + 5/0

°C

Time at Peak Temperature . . . . . . . . . . . . 10 sec to 40 sec

microSOIC Package

θ

. . . . . . . . . . . . . . . . . . . . . 206

°C/W

Lead Temperature (10 secs) . . . . . . . . . . . . . . . . . . . 300

°C

Reflow Soldering

Peak Temperature . . . . . . . . . . . . . . . . . . . . . . 220 +5/0

°C

Time at Peak Temperature . . . . . . . . . . . . . 10 sec to 40 sec

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those listed in the operational

sections of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection. Although

the AD7740 features proprietary ESD protection circuitry, permanent damage may occur on

devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are

recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE