EVAL-AD7791EBZ datasheet(5/21 Pages) AD

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AD7791

Data Sheet

Rev. A | Page 4 of 20

SPECIFICATIONS (continued)1

Parameter

AD7791B

Unit

Test Conditions/Comments

REFERENCE INPUT (continued)

Normal Mode Rejection2

@ 50 Hz, 60 Hz

dB min

73 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[2:0] = 1004

@ 50 Hz

dB min

90 dB typ, 50 ± 1 Hz, FS[2:0] = 1014

@ 60 Hz

dB min

90 dB typ, 60 ± 1 Hz, FS[2:0] = 0114

Common Mode Rejection

AIN = 1 V

@ DC

100

dB typ

FS[2:0] = 1004

@ 50 Hz, 60 Hz

110

dB typ

50 ± 1 Hz (FS[2:0] = 1014), 60 ± 1 Hz (FS[2:0] = 0114)

LOGIC INPUTS

All Inputs Except SCLK2

VINL, Input Low Voltage

0.8

V max

VDD = 5 V

0.4

V max

VDD = 3 V

VINH, Input High Voltage

2.0

V min

VDD = 3 V or 5 V

SCLK Only (Schmitt-Triggered Input)2

VT(+)

1.4/2

V min/V max

VDD = 5 V

VT(–)

0.8/1.4

V min/V max

VDD = 5 V

VT(+) – VT(–)

0.3/0.85

V min/V max

VDD = 5 V

VT(+)

0.9/2

V min/V max

VDD = 3 V

VT(–)

0.4/1.1

V min/V max

VDD = 3 V

VT(+) - VT(–)

0.3/0.85

V min/V max

VDD = 3 V

Input Currents

±1

µA max

VIN = VDD or GND

Input Capacitance

pF typ

All Digital Inputs

LOGIC OUTPUTS

VOH, Output High Voltage2

VDD – 0.6

V min

VDD = 3 V, ISOURCE = 100 µA

VOL, Output Low Voltage2

0.4

V max

VDD = 3 V, ISINK = 100 µA

VOH, Output High Voltage2

V min

VDD = 5 V, ISOURCE = 200 µA

VOL, Output Low Voltage2

0.4

V max

VDD = 5 V, ISINK = 1.6 mA

Floating-State Leakage Current

±1

µA max

Floating-State Output Capacitance

pF typ

Data Output Coding

Offset Binary

POWER REQUIREMENTS5

Power Supply Voltage

VDD – GND

2.5/5.25

V min/max

Power Supply Currents

IDD Current6

µA max

65 µA typ, VDD = 3.6 V, Unbuffered Mode

145

µA max

130 µA typ, VDD = 3.6 V, Buffered Mode

µA max

73 µA typ, VDD = 5.25 V, Unbuffered Mode

160

µA max

145 µA typ, VDD = 5.25 V, Buffered Mode

IDD (Power-Down Mode)

µA max

Digital inputs equal to VDD or GND.

The current consumption can be further reduced by using the ADC in one of the low power modes (see Table 14).

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