AD7674AST datasheet(7/28 Pages) AD

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AD7674

Rev. A | Page 7 of 28

ABSOLUTE MAXIMUM RATINGS

Table 5. AD7674 Absolute Maximum Ratings1

Parameter

Rating

Analog Inputs

IN+2, IN–2, REF, REFBUFIN,

REFGND to AGND

AGND – 0.3 V to

AVDD + 0.3 V

Ground Voltage Differences

AGND, DGND, OGND

±0.3 V

Supply Voltages

AVDD, DVDD, OVDD

–0.3 V to +7 V

AVDD to DVDD, AVDD to OVDD

±7 V

DVDD to OVDD

–0.3 V to +7 V

Digital Inputs

–0.3 V to DVDD + 0.3 V

Internal Power Dissipation3

700 mW

Internal Power Dissipation4

2.5 W

Junction Temperature

150°C

Storage Temperature Range

–65°C to +150°C

Lead Temperature Range

(Soldering 10 sec)

300°C

1Stresses above those listed under Absolute Maximum Ratings may cause

permanent damage to the device. This is a stress rating only; functional

operation of the device at these or any other conditions above those

indicated in the operational section of this specification is not implied.

Exposure to absolute maximum rating conditions for extended periods may

affect device reliability.

2See Analog Input section.

3Specification is for device in free air: 48-Lead LQFP: θJA = 91°C/W,

θJC = 30°C/W.

4 Specification is for device in free air: 48-Lead LFCSP: θJA = 26°C/W.

TO OUTPUT

60pF1

500

μA

IOH

1.6mA

IOL

1.4V

IN SERIAL INTERFACE MODES,THE SYNC, SCLK, AND

SDOUT TIMINGS ARE DEFINED WITH A MAXIMUM LOAD

CL OF 10pF; OTHERWISE,THE LOAD IS 60pF MAXIMUM.

NOTE

03083–0–002

Figure 2. Load Circuit for Digital Interface Timing, SDOUT, SYNC, SCLK

Outputs, CL = 10 pF

0.8V

DELAY

0.8V

DELAY

03083–0–003

Figure 3. Voltage Reference Levels for Timing

ESD CAUTION

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