AD8021 datasheet(4/28 Pages) AD

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AD7986

Rev. B | Page 4 of 28

AVDD = DVDD = 2.5 V, BVDD = 5 V, VIO = 1.8 V to 2.7 V, VREF = 4.096 V, TA = −40°C to +85°C, unless otherwise noted.

Table 3.

Parameter

Conditions

Min

Typ

Max

Unit

INTERNAL REFERENCE

PDREF = low

Output Voltage

A= 25°C

4.081

4.096

4.111

Temperature Drift

−40°C to +85°C

±10

ppm/°C

Line Regulation

AVDD = 2.5 V ± 5%

±50

ppm/V

Turn-On Settling Time

REF = 10 μF, CREFBUFIN = 0.1 μF

220

REFIN Output Voltage

REFIN @ 25°C

1.2

REFIN Output Resistance

7.5

kΩ

EXTERNAL REFERENCE

PDREF = high, REFIN = low

Voltage Range

2.4

5.1

Current Drain

2 MSPS, V

REF = 5.0 V

500

µA

REFERENCE BUFFER

REFIN Input Voltage Range

1.2

REFIN Input Current

160

µA

DIGITAL INPUTS

Logic Levels

−0.3

+0.1 × VIO

+0.9 × VIO

VIO + 0.3

−1

µA

−1

µA

DIGITAL OUTPUTS

Data Format

Serial, 18 bits, twos complement

Pipeline Delay

Conversion results available immediately

after completed conversion

SINK = +500 µA

0.4

SOURCE = −500 µA

VIO − 0.3

POWER SUPPLIES

AVDD, DVDD

2.375

2.5

2.625

BVDD

4.75

5.0

5.25

VIO

Specified performance

1.8

2.5

2.7

VIO Range

Standby Current1, 2

AVDD = DVDD = VIO = 2.5 V, BVDD = 5.0 V

2.25

µA

Power Dissipation

With Internal Reference

2 MSPS throughput

Without Internal Reference

2 MSPS throughput

16.5

With Internal Reference

1.5 MSPS throughput

Without Internal Reference

1.5 MSPS throughput

11.5

TEMPERATURE RANGE3

Specified Performance

MIN to TMAX

−40

+85

°C

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

2 During acquisition phase.

3 Contact an Analog Devices, Inc., sales representative for the extended temperature range.

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