AD7294 datasheet(4/45 Pages) AD

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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

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

μS

Analog Input Range

VREF or 2 VREF

Input Capacitance

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

Bits

0.25 °C LSB size

Low Level Output Current Source

µA

Medium Level Output Current

Source

µA

High Level Output Current Source

128

µA

CURRENT SENSE

Common-Mode Input Range

AVDD

±200 mV Full Scale Voltage

Full-Scale Sense Voltage

200

RS(+) and RS(−) Input Bias Current

µA

CMRR / PSRR

Pin connected to power supply

Maximum Series Resistance for

external diode

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

Reference Input Voltage Range

0.1

2.5

DC Leakage Current

±30

µA

Input Capacitance

VREF Output Impedance

Ω

Reference Temperature Coefficient

ppm/°C

10 ppm/°C typ

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