AD79821 datasheet(6/24 Pages) AD

6 / 24 page

AD7946

Rev. A | Page 6 of 24

ABSOLUTE MAXIMUM RATINGS

Table 5.

Parameter

Rating

Analog Inputs

IN+1, IN−1

GND − 0.3 V to VDD + 0.3 V or

±130 mA

REF

GND − 0.3 V to VDD + 0.3 V

Supply Voltages

VDD, VIO to GND

−0.3 V to +7 V

VDD to VIO

±7 V

Digital Inputs to GND

−0.3 V to VIO + 0.3 V

Digital Outputs to GND

−0.3 V to VIO + 0.3 V

Storage Temperature Range

−65°C to +150°C

Junction Temperature

150°C

θJA Thermal Impedance

10-Lead MSOP

200°C/W

10-Lead QFN

48.7°C/W

θJC Thermal Impedance

10-Lead MSOP

44°C/W

10-Lead QFN

2.96°C/W

Lead Temperature

Vapor Phase (60 sec)

215°C

Infrared (15 sec)

220°C

1 See the Analog Input section.

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.

ESD CAUTION

500µA

IOL

500µA

IOH

1.4V

SDO

50pF

Figure 2. Load Circuit for Digital Interface Timing

30% VIO

70% OVDD

2V or VIO – 0.5V1

0.8V or 0.5V2

2V or OVDD – 0.5V1

tDELAY

NOTES

12V IF VIO ABOVE 2.5V, VIO – 0.5V IF VIO BELOW 2.5V.

20.8V IF VIO ABOVE 2.5V, 0.5V IF VIO BELOW 2.5V.

Figure 3. Voltage Levels for Timing

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