AD7779_16 datasheet(10/101 Pages) AD

номер детали	AD7779

подробное описание детали	8-Channel, 24-Bit, Simultaneous Sampling ADC

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10 / 101 page

Data Sheet

AD7779

Rev. A | Page 9 of 100

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

POWER SUPPLIES

All Σ-Δ channels enabled

AVDD1x – AVSSx

3.0

3.6

V

IAVDD1x4, 5

Reference buffer pre-Q, VCM

enabled, internal reference enabled

High resolution mode

17

22.7

mA

Low power mode

4.5

6.1

mA

Reference buffer enabled, VCM

enabled, internal reference enabled

High resolution mode

19

25.5

mA

Low power mode

5

6.8

mA

Reference buffer disabled, VCM

disabled, internal reference disabled

High resolution mode

13

17.8

mA

Low power mode

3.5

4.8

mA

AVDD2x – AVSSx

2.2

3.6

V

IAVDD2x

High resolution mode

9

9.45

mA

Low power mode

3.5

3.7

mA

AVDD4 – AVSSx

AVDD1x – 0.3

AVDD1x

V

IAVDD4

SAR enabled

1.7

2

mA

SAR disabled

1

10

µA

AVSSx − DGND

−1.8

0

V

IOVDD − DGND

1.8

3.6

V

IIOVDD

High resolution mode

8

10.7

mA

Low power mode

3

4.4

mA

Power Dissipation6

Internal buffers bypassed, internal

reference disabled, internal

oscillator disabled, SAR disabled

High Resolution Mode

16 kSPS

86

133

mW

Low Power Mode

4 kSPS

27

44

mW

Power-Down

All ADCs disabled

530

µW

1

AVSSx is used to refer to the following pins: AVSS1A, AVSS1B, AVSS2B, and AVSS2A. This term is used throughout the data sheet.

2

At temperatures higher than 105°C, the device can be operated normally, though slight degradation on the maximum/minimum specifications is expected because

these specifications are only guaranteed up to 105°C. See the Typical Performance Characteristics section for plots showing the typical performance of the device at

high temperatures.

3

The SDO pin and the DOUTx pin are configured in the default mode of strength.

4

AVDD1x = 3.3 V, AVSSx = GND = ground, IOVDD = 1.8 V, CMOS clock.

5

Disabling either the VCM pin or the internal reference results in a 40 µA typical current consumption reduction.

6

Power dissipation is calculated using the maximum supply voltage, 3.6 V.

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