Datasheet

ADS8028
SBAS549B –MAY 2011–REVISED MARCH 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Minimum and maximum specifications apply from T
A
= –40°C to +125°C. Typical specifications are at T
A
= +25°C.
All specifications at AVDD = 2.7 V to 5.25 V, DVDD = 1.65 V to 5.25 V, f
SAMPLE
= 1 MHz, f
SCLK
= 20 MHz, and V
REF
= 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 T
A
= –40°C to +125°C ±1 ±3 °C
Resolution LSB size 0.25 °C
DIGITAL INPUT AND OUTPUT
V
IH
0.7 DVDD V
V
IL
0.3 DVDD V
Logic level
V
OH
SDO load = 20 pF, I
SOURCE
= 500 µA 0.8 DVDD V
V
OL
SDO load = 20 pF, I
SINK
= 500 µA 0.2 DVDD V
Input capacitance 5 pF
I
IN
Input current 0 V < V
DigitalInput
< 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 V
EXT_REF
≤ 2.7 V V
External reference mode with
V
EXT_REF
5.25
V
EXT_REF
> 2.7 V
DVDD Digital supply 1.65 3.0 5.25 V
SUPPLY CURRENT
I
TOTAL
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) I
TOTAL
is the total current flowing in AVDD and DVDD.
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