ADS8028_14 Datasheet, PDF (4/35 Pages) Texas Instruments – 12-Bit, 1-MSPS, 8-Channel, SAR ADC with Internal Reference and Internal Temperature Sensor

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.
PARAMETER
EXTERNAL REFERENCE INPUT
External reference input voltage range
DC leakage current
TEMPERATURE SENSOR
Operating range
Accuracy
Resolution
DIGITAL INPUT AND OUTPUT
V_IH
V_IL
Logic level
V_OH
V_OL
Input capacitance
I_IN
Input current
POWER-SUPPLY REQUIREMENTS
AVDD Analog supply
DVDD Digital supply
SUPPLY CURRENT
I_TOTAL
Total current⁽²⁾
Normal mode
Operational
Static
STANDBY mode
Power-down mode
TEST CONDITIONS
T_A = –40°C to +125°C
LSB size
SDO load = 20 pF, I_SOURCE = 500 µA
SDO load = 20 pF, I_SINK = 500 µA
0 V < V_DigitalInput < DVDD
Internal reference mode
External reference mode with
V_{EXT_REF} ≤ 2.7 V
External reference mode with
V_{EXT_REF} > 2.7 V
AVDD = 3.6 V, DVDD = 3.6 V
AVDD = 5.25 V, DVDD = 5.25 V
AVDD = 3.6 V, DVDD = 3.6 V
AVDD = 5.25 V, DVDD = 5.25 V
AVDD = 3.6 V, DVDD = 3.6 V
AVDD = 3.6 V, DVDD = 3.6 V
ADS8028
MIN
TYP
MAX UNIT
1
AVDD
V
±0.01
±1
µA
–40
+125
°C
±1
±3
°C
0.25
°C
0.7 DVDD
0.8 DVDD
V
0.3 DVDD
V
V
0.2 DVDD
V
5
pF
±0.01
±1
µA
2.7
2.7
V_{EXT_REF}
1.65
3.0
5.25
3.0
5.25
V
5.25
3.0
5.25
V
5.8
6.3
mA
7
7.5
mA
4.1
4.6
mA
4.5
5
mA
1.5
2.5
mA
1
10
µA
(2) I_TOTAL is the total current flowing in AVDD and DVDD.
4
Submit Documentation Feedback
Product Folder Link(s): ADS8028
Copyright © 2011–2012, Texas Instruments Incorporated