AD7682 datasheet(3/28 Pages) AD

3 / 28 page

AD7949

Rev. A | Page 3 of 28

SPECIFICATIONS

VDD = 2.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, all specifications TMIN to TMAX, unless otherwise noted.

Table 2.

Parameter

Conditions/Comments

Min

Typ

Max

Unit

RESOLUTION

Bits

ANALOG INPUT

Voltage Range

Unipolar mode

+VREF

Bipolar mode

−VREF/2

+VREF/2

Absolute Input Voltage

Positive input, unipolar and bipolar modes

−0.1

VREF + 0.1

Negative or COM input, unipolar mode

−0.1

+0.1

Negative or COM input, bipolar mode

VREF/2 − 0.1

VREF/2

VREF/2 + 0.1

Analog Input CMRR

fIN = 250 kHz

Leakage Current at 25°C

Acquisition phase

Input Impedance1

THROUGHPUT

Conversion Rate

Full Bandwidth2

VDD = 4.5 V to 5.5 V

250

kSPS

VDD = 2.3 V to 4.5 V

200

kSPS

¼ Bandwidth2

VDD = 4.5 V to 5.5 V

62.5

kSPS

VDD = 2.3 V to 4.5 V

kSPS

Transient Response

Full-scale step, full bandwidth

1.8

μs

Full-scale step, ¼ bandwidth

14.8

μs

ACCURACY

No Missing Codes

Bits

Integral Linearity Error

−1

±0.5

LSB3

Differential Linearity Error

−1

±0.25

LSB

Transition Noise

REF = VDD = 5 V

0.1

LSB

Gain Error4

−5

±0.5

LSB

Gain Error Match

−1

±0.2

LSB

Gain Error Temperature Drift

±1

ppm/°C

Offset Error4

±0.5

LSB

Offset Error Match

−1

±0.2

LSB

Offset Error Temperature Drift

±1

ppm/°C

Power Supply Sensitivity

VDD = 5 V

± 5%

±0.2

LSB

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