AD7942BCPZRL1 datasheet(3/24 Pages) AD

부품명	AD7942BCPZRL1

상세설명	14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/QFN

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AD7942

Rev. B | Page 3 of

24

SPECIFICATIONS

VDD = 2.3 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.

Table 2.

Parameter

Conditions

Min

Typ

Max

Unit

RESOLUTION

14

Bits

ANALOG INPUT

Voltage Range

IN+ − IN−

0

VREF

V

Absolute Input Voltage

IN+

−0.1

VDD + 0.1

V

IN−

−0.1

+0.1

V

Analog Input CMRR

fIN = 250 kHz

65

dB

Leakage Current

TA = 25°C, acquisition phase

1

nA

Input Impedance

See the Analog Input section

ACCURACY

No Missing Codes

14

Bits

Differential Linearity Error

−0.7

±0.3

+0.7

LSB1

Integral Linearity Error

−1

±0.4

+1

LSB

Transition Noise

VREF = VDD = 5 V

0.33

LSB

Gain Error2, TMIN to TMAX

±0.7

±6

LSB

Gain Error Temperature Drift

±1

ppm/°C

Offset Error2, TMIN to TMAX

VDD = 4.5 V to 5.5 V

±0.45

±3

mV

VDD = 2.3 V to 4.5 V

±0.75

±4.5

mV

Offset Temperature Drift

±2.5

ppm/°C

Power Supply Sensitivity

VDD = 5 V

± 5%

±0.1

LSB

THROUGHPUT

Conversion Rate

VDD = 4.5 V to 5.5 V

0

250

kSPS

VDD = 2.3 V to 4.5 V

0

200

kSPS

Transient Response

Full-scale step

1.8

μs

AC ACCURACY

Signal-to-Noise Ratio (SNR)

fIN = 20 kHz, VREF = 5 V

84.5

85

dB3

fIN = 20 kHz, VREF = 2.5 V

84

dB

Spurious-Free Dynamic Range (SFDR)

fIN = 20 kHz

−100

dB

Total Harmonic Distortion (THD)

fIN = 20 kHz

−100

dB

Signal-to-Noise and Distortion Ratio (SINAD)

fIN = 20 kHz, VREF = 5 V

83

85

dB

fIN = 20 kHz, VREF = 5 V, −60 dB input

25

dB

fIN = 20 kHz, VREF = 2.5 V

84

dB

REFERENCE

Voltage Range

0.5

VDD + 0.3

V

Load Current

250 kSPS, VREF = 5 V

50

μA

SAMPLING DYNAMICS

−3 dB Input Bandwidth

2

MHz

Aperture Delay

VDD = 5 V

2.5

ns

DIGITAL INPUTS

Logic Levels

VIL

–0.3

+0.3 × VIO

V

VIH

0.7 × VIO

VIO + 0.3

V

IIL

−1

+1

μA

IIH

−1

+1

μA

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