ADS8028

SBAS549B – MAY 2011 – REVISED MARCH 2012

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ELECTRICAL CHARACTERISTICS (continued)

Minimum and maximum specifications apply from TA = –40°C to +125°C. Typical specifications are at TA = +25°C.

All specifications at AVDD = 2.7 V to 5.25 V, DVDD = 1.65 V to 5.25 V, fSAMPLE = 1 MHz, fSCLK = 20 MHz, and VREF = 2.5 V

internal, unless otherwise noted.

ADS8028

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

EXTERNAL REFERENCE INPUT

External reference input voltage range

1

AVDD

V

DC leakage current

±0.01

±1

µA

TEMPERATURE SENSOR

Operating range

–40

+125

°C

Accuracy

TA = –40°C to +125°C

±1

±3

°C

Resolution

LSB size

0.25

°C

DIGITAL INPUT AND OUTPUT

VIH

0.7 DVDD

V

VIL

0.3 DVDD

V

Logic level

VOH

SDO load = 20 pF, ISOURCE = 500 µA

0.8 DVDD

V

VOL

SDO load = 20 pF, ISINK = 500 µA

0.2 DVDD

V

Input capacitance

5

pF

IIN

Input current

0 V < VDigitalInput < DVDD

±0.01

±1

µA

POWER-SUPPLY REQUIREMENTS

Internal reference mode

2.7

3.0

5.25

External reference mode with

2.7

3.0

5.25

AVDD

Analog supply

VEXT_REF ≤ 2.7 V

V

External reference mode with

VEXT_REF

5.25

VEXT_REF > 2.7 V

DVDD

Digital supply

1.65

3.0

5.25

V

SUPPLY CURRENT

ITOTAL

Total current(2)

AVDD = 3.6 V, DVDD = 3.6 V

5.8

6.3

mA

Operational

AVDD = 5.25 V, DVDD = 5.25 V

7

7.5

mA

Normal mode

AVDD = 3.6 V, DVDD = 3.6 V

4.1

4.6

mA

Static

AVDD = 5.25 V, DVDD = 5.25 V

4.5

5

mA

STANDBY mode

AVDD = 3.6 V, DVDD = 3.6 V

1.5

2.5

mA

Power-down mode

AVDD = 3.6 V, DVDD = 3.6 V

1

10

µA

(2)

ITOTAL is the total current flowing in AVDD and DVDD.

4

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