AD7631BCPZRL datasheet(3/32 Pages) AD

Teilenummer	AD7631BCPZRL

Bauteilbeschribung	18-Bit, 250 kSPS, Differential Programmable Input PulSAR짰 ADC

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Hersteller	AD [Analog Devices]

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AD7631

Rev. A | Page 3 of 32

SPECIFICATIONS

AVDD = DVDD = 5 V; OVDD = 2.7 V to 5.5 V; VCC = 15 V; VEE = −15 V; VREF = 5 V; all specifications TMIN to TMAX, unless otherwise noted.

Table 2.

Parameter

Conditions/Comments

Min

Typ

Max

Unit

RESOLUTION

18

Bits

ANALOG INPUTS

Differential Voltage Range, VIN

(VIN+) − (VIN−)

0 V to 5 V

VIN = 10 V p-p

−VREF

+VREF

V

0 V to 10 V

VIN = 20 V p-p

−2 VREF

+2 VREF

V

±5 V

VIN = 20 V p-p

−2 VREF

+2 VREF

V

±10 V

VIN = 40 V p-p

−4 VREF

+4 VREF

V

Operating Voltage Range

VIN+, VIN− to AGND

0 V to 5 V

−0.1

+5.1

V

0 V to 10 V

−0.1

+10.1

V

±5 V

−5.1

+5.1

V

±10 V

−10.1

+10.1

V

Common-Mode Voltage Range

VIN+, VIN−

5 V

VREF/2 − 0.1

VREF/2

VREF/2 + 0.1

V

10 V

VREF − 0.2

VREF

VREF + 0.2

V

Bipolar Ranges

−0.1

0

+0.1

V

Analog Input CMRR

fIN = 100 kHz

75

dB

Input Current

250 kSPS throughput

801

μA

Input Impedance

See

Analog Inputs section

THROUGHPUT SPEED

Complete Cycle

4.0

μs

Throughput Rate

250

kSPS

DC ACCURACY

Integral Linearity Error2

250 kSPS throughput

−2.5

±1.5

+2.5

LSB3

No Missing Codes

18

Bits

Differential Linearity Error2

−1

+2.5

LSB

Transition Noise

0.75

LSB

Unipolar Zero Error

−0.06

+0.06

%FS

Bipolar Zero Error

−0.03

+0.03

%FS

Zero-Error Temperature Drift

±0.5

ppm/°C

Bipolar Full-Scale Error

−0.09

+0.09

%FS

Unipolar Full-Scale Error

−0.07

+0.07

%FS

Full-Scale Error Temperature Drift

±0.5

ppm/°C

Power Supply Sensitivity

AVDD = 5 V ± 5%

3

LSB

AC ACCURACY

Dynamic Range

VIN = 0 to 5 V, fIN = 2 kHz, −60 dB

100

101.8

dB4

VIN = all other input ranges, fIN = 2 kHz, −60 dB

100

102.5

dB

Signal-to-Noise Ratio

VIN = 0 to 5 V, fIN = 2 kHz

99.5

100.5

dB

VIN = all other input ranges, fIN = 2 kHz

100

101

dB

Signal-to-(Noise + Distortion), SINAD

fIN = 2 kHz

100

dB

Total Harmonic Distortion

fIN = 2 kHz

112

dB

Spurious-Free Dynamic Range

fIN = 2 kHz

113

dB

−3 dB Input Bandwidth

VIN = 0 V to 5 V

45

MHz

SAMPLING DYNAMICS

Aperture Delay

2

ns

Aperture Jitter

5

ps rms

Transient Response

Full-scale step

500

ns

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