AD7949 datasheet(4/20 Pages) AD

Il numero della parte	AD7949

Spiegazioni elettronici	16-Bit, 8-Channel, 250 kSPS PulSAR짰 ADC.

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Produttore elettronici	AD [Analog Devices]

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AD7689

Preliminary Technical Data

Rev. PrC | Page 4 of 20

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 3.

Parameter

Conditions/Comments

Min

Typ

Max

Unit

INTERNAL REFERENCE

Output Voltage

For 4.096 V output, @ 25°C

4.086

4.096

4.106

V

For 2.5 V output, @ 25°C

2.490

2.500

2.510

V

Temperature Drift

–40°C to +85°C

±TBD

ppm/°C

Line Regulation

VDD = 5 V ± 5%

±TBD

ppm/V

Long-Term Drift

1000 hours

50

ppm

Turn-On Settling Time

CREF = 22 μF

TBD

ms

EXTERNAL REFERENCE

Voltage Range

REF Input

0.5

VDD + 0.3

V

REFIN Input (Buffered)

0.5

4.096

V

Current Drain

250 kSPS, REF = 5V

50

μA

TEMPERATURE SENSOR

Output Voltage1

@ 25°C

283

mV

Temperature Sensitivity

1

mV/°C

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

DIGITAL OUTPUTS

Data Format2

Pipeline Delay3

VOL

ISINK = +500 μA

0.4

V

VOH

ISOURCE = −500 μA

VIO − 0.3

V

POWER SUPPLIES

VDD

Specified performance

2.3

5.5

V

VIO

Specified performance

2.3

VDD + 0.3

V

VIO Range

1.8

VDD + 0.3

V

Standby Current4, 5

VDD and VIO = 5 V, 25°C

1

50

nA

Power Dissipation

VDD = 5V , 100 kSPS throughput

6

mW

VDD = 5V , 250 kSPS throughput

15

mW

VDD = 5V , 250 kSPS throughput

internal reference and buffer

enabled

18.5

mW

Energy per Conversion

50

nJ

TEMPERATURE RANGE6

Specified Performance

TMIN to TMAX

−40

+85

°C

1 The output voltage is internal and present on a dedicated multiplexer input.

2 Unipolar mode: serial 16-bit straight binary

Bipolar mode: serial 16-bit 2’s complement.

3 Conversion results available immediately after completed conversion.

4 With all digital inputs forced to VIO or GND as required.

5 During acquisition phase.

6 Contact an Analog Devices sales representative for the extended temperature range.

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