AD7949(RevA) 查看數據表（PDF） - Analog Devices

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AD7949
(Rev.:RevA)

14-Bit, 8-Channel, 250 kSPS PulSAR ADC

Analog Devices 

AD7949

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

RESOLUTION

ANALOG INPUT

Voltage Range

Absolute Input Voltage

Analog Input CMRR

Leakage Current at 25°C

Input Impedance1

THROUGHPUT

Conversion Rate

Full Bandwidth2

¼ Bandwidth2

Transient Response

ACCURACY

No Missing Codes

Integral Linearity Error

Differential Linearity Error

Transition Noise

Gain Error4

Gain Error Match

Gain Error Temperature Drift

Offset Error4

Offset Error Match

Offset Error Temperature Drift

Power Supply Sensitivity

Conditions/Comments

Unipolar mode

Bipolar mode

Positive input, unipolar and bipolar modes

Negative or COM input, unipolar mode

Negative or COM input, bipolar mode

fIN = 250 kHz

Acquisition phase

VDD = 4.5 V to 5.5 V

VDD = 2.3 V to 4.5 V

VDD = 4.5 V to 5.5 V

VDD = 2.3 V to 4.5 V

Full-scale step, full bandwidth

Full-scale step, ¼ bandwidth

REF = VDD = 5 V

VDD = 5 V ± 5%

Min

Typ

Max

14

0

−VREF/2

−0.1

−0.1

VREF/2 − 0.1

VREF/2

68

1

+VREF

+VREF/2

VREF + 0.1

+0.1

VREF/2 + 0.1

0

250

0

200

0

62.5

0

50

1.8

14.8

14

−1

±0.5

+1

−1

±0.25 +1

0.1

−5

±0.5

+5

−1

±0.2

+1

±1

±0.5

−1

±0.2

+1

±1

±0.2

Unit

Bits

V

V

dB

nA

kSPS

kSPS

kSPS

kSPS

μs

μs

Bits

LSB3

LSB

LSB

LSB

LSB

ppm/°C

LSB

LSB

ppm/°C

LSB

Rev. A | Page 3 of 28

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