Data Sheet

AD7798/AD7799

Rev. B | Page 5 of 28

Parameter

AD7798B/AD7799B1

Unit

Test Conditions/Comments

SYSTEM CALIBRATION2

Full-Scale Calibration Limit

1.05 × FS

V max

if the in-amp is active.

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

180

µA max

400

µA max

500

µA max

1

µA max

1

Temperature range is –40°C to +105°C. At the 19.6 Hz and 39.2 Hz update rates, the INL, power supply rejection (PSR), common-mode rejection (CMR), and normal

exceeded, the INL, for example, is reduced to 18 ppm of FS typically and the PSR is reduced to 69 dB typically. Therefore, for guaranteed performance at these update

2

Specification is not production tested, but is supported by characterization data at initial product release.

3

Following a calibration, this error is in the order of the noise for the programmed gain and update rate selected.

4

Recalibration at any temperature removes these errors.

5

6

FS[3:0] are the four bits used in the mode register to select the output word rate.

7