AD7294 datasheet(4/45 Pages) AD

Il numero della parte	AD7294

Spiegazioni elettronici	12-Bit, Multichannel, DAC/ADC Temperature Sensor and Current Sense for Monitor and Control Applications

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Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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4 / 45 page

AD7294

Preliminary Technical Data

Rev. PrB | Page 4 of 45

ADC SPECIFICATIONS1

AVDD = DVDD 4.5 V to 5.5 V, AGND = DGND= 0 V, external 2.5 V reference. Temperature range for B version: −40°C to +105°C. All

specifications TMIN to TMAX, unless otherwise noted.

Parameter

Min

Typ

Max

Unit

Test Conditions / Comments

ACCURACY

Resolution

12

Bits

Integral Nonlinearity (INL)

±0.5

±1

LSB

Differential Mode

Single Ended or Pseudo-Differential

Mode

Differential Nonlinearity (DNL)

±1

LSB

Differential Mode

Single Ended or Pseudo-Differential

Mode

Offset Error

±3

LSB

Gain Error

±2

LSB

Total Unadjusted Error (TUE)

TBD

LSB

Conversion Rate

3

μS

Analog Input Range

0

VREF or 2 VREF

V

Input Capacitance

30

pF

DC Input Leakage Current

±1

µA

TEMPERATURE SENSOR

Accuracy

±2

°C

External temperature sensors × 2

TA = −10°C to +90°C

Accuracy

±2

°C

Internal temperature sensor

TA = −10°C to +90°C

Resolution

11

Bits

0.25 °C LSB size

Low Level Output Current Source

8

µA

Medium Level Output Current

Source

32

µA

High Level Output Current Source

128

µA

CURRENT SENSE

Common-Mode Input Range

AVDD

48

V

±200 mV Full Scale Voltage

Full-Scale Sense Voltage

200

mV

RS(+) and RS(−) Input Bias Current

25

µA

CMRR / PSRR

80

dB

Pin connected to power supply

Maximum Series Resistance for

external diode

10

k Ω

Gain

±1

% FS

TA = TMIN to TMAX

Accuracy

Offset

Bandwidth

300

kHz

Amplifier Equivalent RMS Noise

0.8

LSB

60 µV RMS referred to input

REFERENCE

Reference Output Voltage

2.49

2.51

V

Reference Input Voltage Range

0.1

2.5

V

DC Leakage Current

±30

µA

Input Capacitance

20

pF

VREF Output Impedance

25

Ω

Reference Temperature Coefficient

25

ppm/°C

10 ppm/°C typ

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