AD7768 datasheet(9/99 Pages) AD

9 / 99 page

Data Sheet

AD7768/AD7768-4

Rev. A | Page 9 of 99

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

Leakage Current

Floating state

−10

+10

µA

Output Capacitance

Floating state

SYSTEM CALIBRATION2

Full-Scale Calibration Limit

1.05 × VREF

Zero-Scale Calibration Limit

−1.05 × VREF

Input Span

0.4 × VREF

2.1 × VREF

POWER REQUIREMENTS

Power Supply Voltage

AVDD1 − AVSS

4.5

5.0

5.5

AVDD2 − AVSS

2.0

2.25 to 5.0

5.5

AVSS − DGND

−2.75

IOVDD − DGND

See Table 2 for 1.8 V operation

2.25

2.5 to 3.3

3.6

POWER SUPPLY CURRENTS

Maximum output data rate, CMOS MCLK,

eight DOUTx signals, all supplies at

maximum voltages, all channels in

Channel Mode A except where

otherwise specified

AD7768

Eight channels active

Fast Mode

AVDD1 Current

Reference precharge buffers off/on

36/57.5

40/64

AVDD2 Current

37.5

IOVDD Current

Wideband filter

Sinc5 filter

Median Mode

AVDD1 Current

Reference precharge buffers off/on

18.5/29

20.5/32.5

AVDD2 Current

21.3

IOVDD Current

Wideband filter

Sinc5 filter

Eco Mode

AVDD1 Current

Reference precharge buffers off/on

5.1/8

5.8/9

AVDD2 Current

9.3

10.1

IOVDD Current

Wideband filter

12.5

13.7

Sinc5 filter

AD7768-4

Four Channels Active

Fast Mode

AVDD1 Current

Reference precharge buffers off/on

18.2/28.8

20.3/32.5

AVDD2 Current

18.8

20.3

IOVDD Current

Wideband filter2

43.5

46.8

Wideband filter, SPI mode only;

Channel Mode A set to sinc5 filter8

Sinc5 filter2

18.6

Median Mode

AVDD1 Current

Reference precharge buffers off/on

9.3/14.7

10.5/16.6

AVDD2 Current

10.7

11.7

IOVDD Current

Wideband filter2

24.4

26.4

Wideband filter, SPI mode only;

Channel Mode A set to sinc5 filter8

Sinc5 filter2

12.3

Eco Mode

AVDD1 Current

Reference precharge buffers off/on

2.7/4.1

3.1/4.7

AVDD2 Current

4.7

5.3

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