AD7631/AD7634

Preliminary Technical Data

Rev. PrC | Page 8 of 14

ABSOLUTE MAXIMUM RATINGS

Table 5.

Parameter

Rating

Stresses 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.

Analog Inputs/Outputs

IN+, IN−, REF, REFBUFIN, TEMP,

INGND, REFGND to AGND

AVDD + 0.3 V to

AGND − 0.3 V

Ground Voltage Differences

AGND, DGND, OGND

±0.3 V

Supply Voltages

AVDD, DVDD

−0.3 V to +2.7 V

OVDD

−0.3 V to +3.8 V

AVDD to DVDD

±2.8 V

AVDD, DVDD to OVDD

−3.8 V to +2.8 V

Digital Inputs

−0.3 V to +5.5 V

PDREF, PDBUF

±20 mA

Internal Power Dissipation

700 mW

1

Internal Power Dissipation

2.5 W

2

Junction Temperature

125°C

Storage Temperature Range

–65°C to +125°C

1. Specification is for the device in free air:

2. Specification is for the device in free air:

ESD 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 this product 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.

NOTE

IN SERIAL INTERFACE MODES, THE SYNC, SCLK, AND

SDOUT TIMING ARE DEFINED WITH A MAXIMUM LOAD

1.4V

TO OUTPUT

PIN

50pF

0.8V

2V

2V

0.8V

0.8V

2V

Figure 3. Voltage Reference Levels for Timing

Figure 2. Load Circuit for Digital Interface Timing,

SDOUT, SYNC, and SCLK Outputs, C = 10 pF

L