AD7294 datasheet(8/48 Pages) AD

8 / 48 page

Data Sheet

AD7294

Rev. I | Page 7 of 47

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

TEMPERATURE SENSOR—INTERNAL

Operating Range

−40

+105

°C

Accuracy

±2

°C

Internal temperature sensor, TA = −30°C to +90°C

±2.5

°C

Internal temperature sensor, TA = −40°C to +105°C

Resolution

0.25

°C

LSB size

Update Rate

TEMPERATURE SENSOR—EXTERNAL

External transistor is 2N3906

Operating Range

−55

+150

°C

Limited by external diode

Accuracy

±2

°C

TA = TDIODE = −40°C to +105°C

Resolution

0.25

°C

LSB size

Low Level Output Current Source2

µA

Medium Level Output Current Source2

µA

High Level Output Current Source2

128

µA

Maximum Series Resistance (RS) for

External Diode2

100

Ω

For < ±0.5°C additional error, CP = 0, see Figure 31

Maximum Parallel Capacitance (CP) for

External Diode2

RS = 0, see Figure 30

CURRENT SENSE

VPP = AVDD to 59.4 V

VPP Supply Range

AVDD

59.4

Gain

12.4375

12.5

12.5625

Gain of 12.5 gives a gain error = 0.5% maximum;

delivers ±200 mV range with +2.5 V reference

RS(+)/RS(−) Input Bias Current

µA

CMRR/PSRR2

Inputs shorted to VPP

Offset Error

±50

±340

µV

Offset Drift

µV/°C

Amplifier Peak-To-Peak Noise2

400

µV

Referred to input

VPP Supply Current

0.18

0.25

VPP = 59.4 V

REFERENCE

Reference Output Voltage

2.49

2.51

±0.2% maximum at 25°C only

Reference Input Voltage Range

0.1

4.1

For four uncommitted ADCs

AVDD − 2

For current sense

DC Leakage Current

±2

μA

VREF Output Impedance2

Ω

Input Capacitance2

Reference Temperature Coefficient

ppm/°C

See the Terminology section for more details.

Sampled during initial release to ensure compliance, not subject to production testing.

VIN+ or VIN− must remain within GND/VDD.

4 VIN− = 0 V for specified performance. For full input range on VIN−, see Figure 40.

AD7294 Datasheet(PDF) 8 Page - Analog Devices

AD7294 Datasheet(HTML) 8 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 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

Datasheet Download

Link URL