Datasheet
ADS1146
ADS1147
ADS1148
SBAS453F –JULY 2009–REVISED APRIL 2012
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ELECTRICAL CHARACTERISTICS (continued)
Minimum/maximum specifications apply from –40°C to +105°C. Typical specifications are at +25°C. All specifications at
AVDD = +5V, DVDD = +3.3V, AVSS = DGND = 0V, V
REF
= +2.048V, and oscillator frequency = 4.096MHz, unless otherwise
noted.
ADS1146, ADS1147, ADS1148
PARAMETER CONDITIONS MIN TYP MAX UNIT
CURRENT SOURCES (IDACS)
50, 100, 250,
Output current 500, 750, 1000, μA
1500
Voltage compliance All currents AVDD – 0.7 V
Initial error All currents, each IDAC –6 ±1.0 6 % of FS
Initial mismatch All currents, between IDACs ±0.03 % of FS
Temperature drift Each IDAC 200 ppm/°C
Temperature drift matching Between IDACs 10 ppm/°C
SYSTEM MONITORS
Voltage T
A
= +25°C 118 mV
Temperature
sensor reading
Drift 405 μV/°C
GENERAL-PURPOSE INPUT/OUTPUT (GPIO)
V
IH
0.7AVDD AVDD V
V
IL
AVSS 0.3AVDD V
Logic levels
V
OH
I
OH
= 1mA 0.8AVDD V
V
OL
I
OL
= 1mA AVSS 0.2 AVDD V
DIGITAL INPUT/OUTPUT (other than GPIO)
V
IH
0.7DVDD DVDD V
V
IL
DGND 0.3DVDD V
Logic levels
V
OH
I
OH
= 1mA 0.8DVDD V
V
OL
I
OL
= 1mA DGND 0.2 DVDD V
Input leakage DGND < V
DIGITAL IN
< DVDD ±10 μA
Frequency 1 4.5 MHz
Clock input
(CLK)
Duty cycle 25 75 %
Internal oscillator frequency 3.89 4.096 4.3 MHz
POWER SUPPLY
DVDD 2.7 5.25 V
AVSS –2.5 0 V
AVDD AVSS + 2.7 AVSS + 5.25 V
Normal mode, DVDD = 5V,
230 μA
data rate = 20SPS, internal oscillator
DVDD current Normal mode, DVDD = 3.3V,
210 μA
data rate = 20SPS, internal oscillator
Sleep mode 0.2 µA
Converting, AVDD = 5V,
225 µA
data rate = 20SPS, external reference
Converting, AVDD = 3.3V,
212 µA
data rate = 20SPS, external reference
AVDD current
Sleep mode 0.1 µA
Additional current with internal reference
180 μA
enabled
AVDD = DVDD = 5V, data rate = 20SPS,
2.3 mW
external reference, internal oscillator
Power dissipation
AVDD = DVDD = 3.3V, data rate = 20SPS,
1.4 mW
external reference, internal oscillator
TEMPERATURE RANGE
Specified –40 +105 °C
Operating –40 +125 °C
Storage –60 +150 °C
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