AD7763_15 datasheet(5/33 Pages) AD

Part #	AD7763

Description	24-Bit, 625 kSPS, 109 dB Sigma-Delta ADC with On-Chip Buffers, Serial Interface

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5 / 33 page

AD7763

Data Sheet

Rev. B | Page 4 of 32

Parameter

Test Conditions/Comments

Specification

Unit

REFERENCE INPUT

VREF Input Voltage

VDD3 = 3.3 V ± 5%

+2.5

V max

VDD3 = 5 V ± 5%

+4.096

V max

VREF Input DC Leakage Current

±1

µA max

VREF Input Capacitance

5

pF max

POWER DISSIPATION

Total Power Dissipation

Normal power mode

955.5

mW max

Low power mode

651

mW max

Standby Mode

Clock stopped

6.35

mW typ

POWER REQUIREMENTS

AVDD1 (Modulator Supply)

±5%

+2.5

V

AVDD2 (General Supply)

±5%

+5

V

AVDD3 (Differential Amplifier Supply)

+3.15/+5.25

V min/max

AVDD4 (Reference Buffer Supply)

+3.15/+5.25

V min/max

DVDD

±5%

+2.5

V

VDRIVE

+1.65/+2.7

V min/max

Normal Mode

AIDD1 (Modulator)

49/52

mA typ/max

AIDD2 (General)

40/43

mA typ/max

AIDD4 (Reference Buffer)

AVDD4 = 5 V

35/37

mA typ/max

Low Power Mode

AIDD1 (Modulator)

26/28

mA typ/max

AIDD2 (General)

20/23

mA typ/max

AIDD4 (Reference Buffer)

AVDD4 = 5 V

10/11

mA typ/max

AIDD3 (Diff Amp)

AVDD3 = 5 V, both modes

41/45

mA typ/max

DIDD

Both modes

56/62

mA typ/max

DIGITAL I/O

MCLK Input Amplitude3

5

V typ

Input Capacitance

7.3

pF typ

Input Leakage Current

±1

μA/pin max

Three-State Leakage Current (SDO)

±1

μA max

VINH

0.7 × VDRIVE

V min

VINL

0.3 × VDRIVE

V max

VOH4

1.5

V min

VOL

0.1

V max

1

See the Terminology section.

2

SNR specifications in dB are referred to a full-scale input, FS, and tested with an input signal at 0.5 dB below full scale, unless otherwise specified.

3

While the AD7763 can function with an MCLK amplitude of less than 5 V, this is the recommended amplitude to achieve the performance as stated.

4

Tested with a 400 μA load current.

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