AD7294BCPZRL datasheet(7/48 Pages) AD

7 / 48 page

AD7294

Data Sheet

Rev. I | Page 6 of 47

ADC SPECIFICATIONS

AVDD = DVDD = 4.5 V to 5.5 V, AGND = DGND = 0 V, VREF = 2.5 V internal or external; VDRIVE = 2.7 V to 5.5 V; VPP = AVDD to 59.4 V;

TA = −40°C to +105°C, unless otherwise noted.

Table 2.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

DC ACCURACY

Resolution

Bits

Integral Nonlinearity (INL)1

±0.5

±1

LSB

Differential mode

±0.5

±1.5

LSB

Single-ended or pseudo differential mode

Differential Nonlinearity (DNL)1

±0.5

±0.99

LSB

Differential, single-ended, and pseudo differential

modes

Single-Ended Mode

Offset Error

±1

±7

LSB

Offset Error Match

±0.4

LSB

Gain Error

±0.5

±2.5

LSB

Gain Error Match

±0.4

LSB

Differential Mode

Positive Gain Error

±1

LSB

Positive Gain Error Match

±0.5

LSB

Zero Code Error

±3

LSB

Zero Code Error Match

±0.5

LSB

Negative Gain Error

±1

LSB

Negative Gain Error Match

±0.5

LSB

CONVERSION RATE

Conversion Time2

μs

Autocycle Update Rate2

μs

Throughput Rate

22.22

kSPS

fSCL = 400 kHz

ANALOG INPUT3

Single-Ended Input Range

VREF

0 V to VREF mode

2 × VREF

0 V to 2 × VREF mode

Pseudo Differential Input Range: VIN+ − VIN−4

VREF

0 V to VREF mode

2 × VREF

0 V to 2 × VREF mode

Fully Differential Input Range: VIN+ − VIN−

−VREF

+VREF

0 V to VREF mode

−2 × VREF

+2 × VREF

0 V to 2 × VREF mode

Input Capacitance2

DC Input Leakage Current

±1

µA

DYNAMIC PERFORMANCE

Signal-to-Noise Ratio (SNR)1

fIN = 10 kHz sine wave; differential mode

fIN = 10 kHz sine wave; single-ended and pseudo

differential modes

Signal-to-Noise + Distortion (SINAD) Ratio1

71.5

fIN = 10 kHz sine wave; differential mode

72.5

fIN = 10 kHz sine wave; single-ended and pseudo

differential modes

Total Harmonic Distortion (THD)1

−81

fIN = 10 kHz sine wave; differential mode

−79

fIN = 10 kHz sine wave; single-ended and pseudo

differential modes

Spurious-Free Dynamic Range (SFDR)1

−81

fIN = 10 kHz sine wave; differential mode

−79

fIN = 10 kHz sine wave; single-ended and pseudo

differential modes

Channel-to-Channel Isolation2

−90

fIN = 10 kHz to 40 kHz

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