AD974BR datasheet(2/20 Pages) AD

No. de pieza	AD974BR

Descripción Electrónicos	4-Channel, 16-Bit, 200 kSPS Data Acquisition System

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REV. A

–2–

AD974–SPECIFICATIONS

A Grade

B Grade

Parameter

Conditions

Min

Typ

Max

Min

Typ

Max

Units

RESOLUTION

16

Bits

ANALOG INPUT

Voltage Range

±10 V, 0 V to +4 V, 0 V to +5 V (See Table I)

Impedance

Channel On or Off

(See Table I)

Sampling Capacitance

40

pF

THROUGHPUT SPEED

Complete Cycle

(Acquire and Convert)

5

µs

Throughput Rate

200

kHz

DC ACCURACY

Integral Linearity Error

±3

±2.0

LSB1

Differential Linearity Error

–2

+3

–1

+1.75

LSB

No Missing Codes

15

16

Bits

Transition Noise2

1.0

LSB

Full-Scale Error3

Internal Reference

±0.5

±0.25

%

Full-Scale Error Drift

Internal Reference

±7

ppm/

°C

Full-Scale Error

Ext. REF = +2.5 V

±0.5

±0.25

%

Full-Scale Error Drift

Ext. REF = +2.5 V

±2

ppm/

°C

Bipolar Zero Error

Bipolar Range

±10

mV

Bipolar Zero Error Drift

Bipolar Range

±2

ppm/

°C

Unipolar Zero Error

Unipolar Ranges

±10

mV

Unipolar Zero Error Drift

Unipolar Ranges

±2

ppm/

°C

Channel-to-Channel Matching

±0.1

±0.05

% FSR

Recovery to Rated Accuracy

After Power-Down4

2.2

µF to CAP

1

ms

Power Supply Sensitivity

VANA = VDIG = VD

VD = 5 V

± 5%

±8

LSB

AC ACCURACY

Spurious Free Dynamic Range

fIN = 20 kHz

90

96

dB5

Total Harmonic Distortion

fIN = 20 kHz

–90

–96

dB

Signal-to-(Noise+Distortion)

fIN = 20 kHz

83

85

dB

–60 dB Input

27

28

dB

Signal-to-Noise

fIN = 20 kHz

83

85

dB

Channel-to-Channel Isolation

fIN = 20 kHz

–110

–100

–110

–100

dB

Full Power Bandwidth6

1

MHz

–3 dB Input Bandwidth

2.7

MHz

SAMPLING DYNAMICS

Aperture Delay

40

ns

Transient Response

Full-Scale Step

1

µs

Overvoltage Recovery7

150

ns

REFERENCE

Internal Reference Voltage

2.48

2.5

2.52

2.48

2.5

2.52

V

Internal Reference Source Current

1

µA

External Reference Voltage Range

for Specified Linearity

2.3

2.5

2.7

2.3

2.5

2.7

V

External Reference Current Drain

Ext. REF = +2.5 V

100

µA

DIGITAL INPUTS

Logic Levels

VIL

–0.3

+0.8

–0.3

+0.8

V

VIH

+2.0

VDIG + 0.3

+2.0

VDIG + 0.3

V

IIL

±10

µA

IIH

±10

µA

(–40 C to +85 C, fS = 200 kHz, VDIG = VANA = +5 V, unless otherwise noted)

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