AD7191 datasheet(4/20 Pages) AD

4 / 20 page

AD7191

Rev. A | Page 4 of 20

Parameter1

AD7191B

Unit

Test Conditions/Comments

Analog Input Current

Input Current2

±2

nA max

Gain = 1

±3

nA max

Gain > 1

Input Current Drift

±5

pA/°C typ

REFERENCE INPUT

REFIN Voltage

AVDD

V nom

REFIN = REFIN(+)

− REFIN(−).

Reference Voltage Range2

V min

AVDD

V max

The differential input must be limited to

±(AVDD − 1.25 V)/gain when gain > 1.

Absolute REFIN Voltage Limits2

AGND – 50 mV

V min

AVDD + 50 mV

V max

Average Reference Input Current

4.5

μA/V typ

Average Reference Input Current

Drift

±0.03

nA/V/°C typ

External clock.

±1.3

nA/V/°C typ

Internal clock.

Normal-Mode Rejection2

Same as for analog

inputs

Common-Mode Rejection

100

dB typ

TEMPERATURE SENSOR

Accuracy

°C typ

Applies after user calibration at one temperature.

Sensitivity

2815

Codes/°C typ

BRIDGE POWER-DOWN SWITCH

RON

Ω max

Allowable Current2

mA max

Continuous current.

INTERNAL/EXTERNAL CLOCK

Internal Clock

Frequency

4.92 + 4%

MHz min/MHz max

Duty Cycle

50:50

% typ

External Clock/Crystal

Frequency

4.9152

MHz nom

2.4576/5.12

MHz min/MHz max

Input Low Voltage, VINL

0.8

V max

DVDD = 5 V.

0.4

V max

DVDD = 3 V.

Input High Voltage, VINH

2.5

V min

DVDD = 3 V.

3.5

V min

DVDD = 5 V.

Input Current

±10

μA max

MCLKIN = DVDD or DGND.

LOGIC INPUTS

Input High Voltage, VINH2

V min

Input Low Voltage, VINL2

0.8

V max

Hysteresis2

0.1/0.25

V min/V max

Input Currents

±10

μA max

VIN = DVDD or DGND.

LOGIC OUTPUT (DOUT/RDY)

Output High Voltage, VOH 2

DVDD

− 0.6

V min

DVDD = 3 V, ISOURCE = 100 μA.

Output Low Voltage, VOL2

0.4

V max

DVDD = 3 V, ISINK = 100 μA.

Output High Voltage, VOH2

V min

DVDD = 5 V, ISOURCE = 200 μA.

Output Low Voltage, VOL2

0.4

V max

DVDD = 5 V, ISINK = 1.6 mA.

AD7191 Datasheet(PDF) 4 Page - Analog Devices

AD7191 Datasheet(HTML) 4 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Datasheet Download

Link URL