AD7794/AD7795

Rev. D | Page 7 of 36

Parameter1

AD7794/AD7795

Unit

Test Conditions/Comments

LOGIC OUTPUT (INCLUDING CLK)

V min

0.4

V max

4

V min

0.4

V max

Floating-State Leakage Current

±10

μA max

Floating-State Output Capacitance

10

pF typ

Data Output Coding

Offset binary

SYSTEM CALIBRATION2

Full-Scale Calibration Limit

1.05 × FS

V max

Zero-Scale Calibration Limit

−1.05 × FS

V min

Input Span

0.8 × FS

V min

2.1 × FS

V max

POWER REQUIREMENTS7

Power Supply Voltage

2.7/5.25

V min/max

2.7/5.25

V min/max

Power Supply Currents

140

μA max

unbuffered mode, external reference

185

μA max

buffered mode, gain = 1 or 2, external reference

400

μA max

gain = 4 to 128, external reference

500

μA max

gain = 4 to 128, internal reference

1

μA max

AD7794B, AD7795B

2

μA max

AD7794C

typically. In addition, the offset error and offset error drift degrade at these update rates when chopping is disabled. When this voltage is exceeded, the INL, for

example, is reduced to 18 ppm of FS typically while the PSR is reduced to 69 dB typically. Therefore, for guaranteed performance at these update rates, the absolute

voltage on the analog input pins needs to be below AVDD − 1.6 V.