AD7694 datasheet(3/12 Pages) AD

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AD7980-EP

Rev. 0 | Page 3 of 12

SPECIFICATIONS

VDD = 2.5 V, VIO = 2.3 V to 5.5 V, VREF = 5 V, TA = –55°C to +125°C, unless otherwise noted.

Table 2.

Parameter

Conditions

Min

Typ

Max

Unit

RESOLUTION

Bits

ANALOG INPUT

Voltage Range

IN+ − IN−

REF

Absolute Input Voltage

IN+

−0.1

REF + 0.1

IN−

−0.1

+0.1

Analog Input CMRR

IN = 100 kHz

Leakage Current @ 25°C

Acquisition phase

ACCURACY

No Missing Codes

Bits

Differential Linearity Error

REF = 5 V

−0.9

±0.4

+0.9

LSB1

REF = 2.5 V

±0.55

LSB1

Integral Linearity Error

REF = 5 V

−1.5

±0.6

+1.5

LSB1

REF = 2.5 V

±0.65

LSB1

Transition Noise

REF = 5 V

0.6

LSB1

REF = 2.5 V

1.0

LSB1

Gain Error, T

MIN to TMAX

±2

LSB1

Gain Error Temperature Drift

±0.35

ppm/°C

Zero Error, T

MIN to TMAX

−0.62

±0.08

+0.62

Zero Temperature Drift

0.54

ppm/°C

Power Supply Sensitivity

VDD = 2.5 V ± 5%

±0.1

LSB1

THROUGHPUT

Conversion Rate

VIO ≥ 2.3 V up to 85°C, VIO ≥

3.3 V above 85°C up to 125°C

MSPS

Transient Response

Full-scale step

290

AC ACCURACY

Dynamic Range

REF = 5 V

dB3

REF = 2.5 V

dB3

Oversampled Dynamic Range

O = 10 kSPS

111

dB3

Signal-to-Noise Ratio, SNR

IN = 10 kHz, VREF = 5 V

dB3

IN = 10 kHz, VREF = 2.5 V

86.5

dB3

Spurious-Free Dynamic Range, SFDR

IN = 10 kHz

−110

dB3

Total Harmonic Distortion, THD

IN = 10 kHz

−114

dB3

Signal-to-(Noise + Distortion), SINAD

IN = 10 kHz, VREF = 5 V

91.5

dB3

IN = 10 kHz, VREF = 2.5 V

87.0

dB3

1 LSB means least significant bit. With the 5 V input range, 1 LSB is 76.3 µV.

2 These specifications include full temperature range variation, but not the error contribution from the external reference.

3 All specifications in dB are referred to a full-scale input FSR. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified.

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