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AD7294

Data Sheet

Rev. I | Page 8 of 47

GENERAL SPECIFICATIONS

AVDD = DVDD = 4.5 V to 5.5 V, AGND = DGND = 0 V, VREF = 2.5 V internal or external; VDRIVE = 2.7 V to 5.5 V; VPP = AVDD to 59.4 V;

DAC OUTV+ AB and DAC OUTV+ CD = 4.5 V to 16.5 V; OFFSET IN x is floating, therefore, DAC output span = 0 V to 5 V;

TA = −40°C to +105°C, unless otherwise noted.

Table 3.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

LOGIC INPUTS

Input High Voltage, VIH

0.7 VDRIVE

SDA, SCL only

Input Low Voltage, VIL

0.3 VDRIVE

SDA, SCL only

Input Leakage Current, IIN

±1

µA

Input Hysteresis, VHYST

0.05 VDRIVE

Input Capacitance, CIN

Glitch Rejection

Input filtering suppresses noise spikes of less

than 50 ns

I2C Address Pins Maximum External

Capacitance if Floating

Tristate input

LOGIC OUTPUTS

SDA, ALERT

SDA and ALERT/BUSY are open-drain outputs

Output Low Voltage, VOL

0.4

ISINK = 3 mA

0.6

ISINK = 6 mA

Floating-State Leakage Current

±1

µA

Floating-State Output Capacitance

ISENSE OVERRANGE

ISENSE OVERRANGE is a push-pull output

Output High Voltage, VOH

VDRIVE − 0.2

ISOURCE = 200 µA for push-pull outputs

Output Low Voltage, VOL

0.2

ISINK = 200 µA for push-pull outputs

Overrange Setpoint

VFS

VFS × 1.2

VFS = ±VREF ADC/12.5

POWER REQUIREMENTS

VPP

AVDD

59.4

AVDD

4.5

5.5

V(+)

4.5

16.5

DVDD

4.5

5.5

Tie DVDD to AVDD

VDRIVE

2.7

5.5

IDD Dynamic

5.3

6.5

AVDD + DVDD + VDRIVE, DAC outputs unloaded

DAC OUTV+ x, IDD

0.6

1.2

At midscale output voltage, DAC outputs

unloaded

Power Dissipation

105

Power-Down

IDD

0.5

µA

For each AVDD and VDRIVE

DIDD

16.5

µA

DAC OUTV+ x, IDD

µA

Power Dissipation

2.5

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