AD7641AST 데이터 시트보기 (PDF) - Analog Devices

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AD7641AST

18-Bit, 2 MSPS SAR ADC

Analog Devices 

SPECIFICATIONS

AVDD = DVDD = 2.5 V; OVDD = 2.3 V to 3.6 V; VREF = 2.5 V; all specifications TMIN to TMAX, unless otherwise noted.

Table 2.

Parameter

RESOLUTION

ANALOG INPUT

Voltage Range

Operating Input Voltage

Analog Input CMRR

Input Current

Input Impedance2

THROUGHPUT SPEED

Complete Cycle

Throughput Rate

Time Between Conversions

Complete Cycle

Throughput Rate

DC ACCURACY

Integral Linearity Error3

Integral Linearity Error

No Missing Codes

Differential Linearity Error

Transition Noise

Transition Noise

Zero Error, TMIN to TMAX5

Zero Error Temperature Drift

Gain Error, TMIN to TMAX5

Gain Error Temperature Drift

Power Supply Sensitivity

AC ACCURACY

Dynamic Range

Signal-to-Noise

Spurious-Free Dynamic Range

Total Harmonic Distortion

Signal-to-(Noise + Distortion)

−3 dB Input Bandwidth

SAMPLING DYNAMICS

Aperture Delay

Aperture Jitter

Transient Response

INTERNAL REFERENCE

Output Voltage

Temperature Drift

Line Regulation

Conditions

VIN+ − VIN−

VIN+, VIN− to AGND

fIN = 100 kHz

2 MSPS throughput

Wideband warp, warp modes

Wideband warp, warp modes

Wideband warp, warp modes

Normal mode

Normal mode

TMIN to TMAX = −40°C to +70°C

TMIN to TMAX = −40°C to +85°C

VREF = 2.5 V

VREF = 2.048 V

AVDD = 2.5 V ± 5%

VREF = 2.5 V

fIN = 20 kHz, VREF = 2.5 V

fIN = 20 kHz, VREF = 2.048 V

fIN = 100 kHz, VREF = 2.5 V

fIN = 20 kHz, VREF = 2.5 V

fIN = 20 kHz, VREF = 2.048 V

fIN = 100 kHz, VREF = 2.5 V

fIN = 20 kHz, VREF = 2.5 V

fIN = 20 kHz, VREF = 2.048 V

fIN = 100 kHz, VREF = 2.5 V

fIN = 20 kHz, , VREF = 2.5 V

fIN = 20 kHz, VREF = 2.048 V

fIN = 100 kHz, , VREF = 2.5 V

Min

18

−VREF

−0.1

0.001

0

−3

−3.5

18

−1

−15

−0.25

Full-scale step

PDREF = PDBUF = low

REF @ 25°C

−40°C to +85°C

AVDD = 2.5 V ± 5%

2.038

Typ Max

+VREF

AVDD1

58

18

500

2

1

667

1.5

±2

+3

±2

+3.5

+2

1.6

2.0

+15

±0.5

+0.25

±1

±16

95.5

93.5

92

93

112

113

101

−115

−116

−101

93.5

92

92.5

50

1

5

115

2.048

±10

±15

2.058

Rev. 0 | Page 3 of 28

AD7641

Unit

Bits

V

V

dB

μA

ns

MSPS

ms

ns

MSPS

LSB4

LSB4

Bits

LSB

LSB

LSB

LSB

ppm/°C

% of FSR

ppm/°C

LSB

dB6

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

MHz

ns

ps rms

ns

V

ppm/°C

ppm/V

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