AD7682/AD7689

Data Sheet

Rev. H | Page 6 of 35

Table 3.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

INTERNAL REFERENCE

REF Output Voltage

2.5 V at 25°C

2.490

2.500

2.510

V

4.096 V at 25°C

4.086

4.096

4.106

V

2.5 V at 25°C

1.2

V

4.096 V at 25°C

2.3

V

REF Output Current

±300

µA

Temperature Drift

±10

ppm/°C

Line Regulation

VDD = 5 V ± 5%

±15

ppm/V

Long-Term Drift

1000 hours

50

ppm

Turn-On Settling Time

5

ms

EXTERNAL REFERENCE

Voltage Range

REF input

0.5

VDD + 0.3

V

REFIN input (buffered)

0.5

VDD − 0.5

V

250 kSPS, REF = 5 V

50

µA

TEMPERATURE SENSOR

25°C

283

mV

Temperature Sensitivity

1

mV/°C

DIGITAL INPUTS

Logic Levels

−0.3

+0.3 × VIO

V

0.7 × VIO

VIO + 0.3

V

−1

+1

µA

−1

+1

µA

DIGITAL OUTPUTS

0.4

V

VIO − 0.3

V

POWER SUPPLIES

Specified performance

2.3

5.5

V

VIO

Specified performance

1.8

VDD + 0.3

V

VDD and VIO = 5 V at 25°C

50

nA

Power Dissipation

VDD = 2.5 V, 100 SPS throughput

1.7

µW

VDD = 2.5 V, 200 kSPS throughput

3.5

mW

VDD = 5 V, 250 kSPS throughput

12.5

18

mW

VDD = 5 V, 250 kSPS throughput with internal reference

15.5

21

mW

Energy per Conversion

VDD = 5 V

60

nJ

Specified Performance

−40

+85

°C

1

This is the output from the internal band gap.

2

This is an average current and scales with throughput.

3

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

4

Unipolar mode is serial 16-bit straight binary. Bipolar mode is serial 16-bit twos complement.

5

Conversion results available immediately after completed conversion.

6

The minimum VDD supply must be 3 V when the 2.5 V internal reference is enabled, and 4.5 V when the 4.096 V internal reference is enabled. See Figure 23 for more

information.

7

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

8

During acquisition phase.

9

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