Datasheet

ADS1259
SBAS424D –JUNE 2009– REVISED AUGUST 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Minimum/maximum specifications are at T
A
= –40°C to +105°C. Typical specifications are at T
A
= +25°C, AVDD = +2.5V,
AVSS = –2.5V, DVDD = +3.3V, f
CLK
= 7.3728MHz, V
REF
= 2.5V, and f
DATA
= 60SPS, unless otherwise noted.
ADS1259 ADS1259B
PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT
CLOCK SOURCE (f
CLK
)
Nominal frequency 7.3728 7.3728 MHz
Internal oscillator
Accuracy ±0.2 ±2 ±0.2 ±2 %
Frequency range 2 7.3728 8 2 7.3728 8 MHz
Crystal oscillator
Start-up time
(12)
20 20 ms
Frequency range 0.1 7.3728 8 0.1 7.3728 8 MHz
External clock
Duty cycle 40 60 40 60 %
DIGITAL INPUT/OUTPUT (DVDD = 2.7V to 5.25V)
V
IH
0.8 DVDD DVDD 0.8 DVDD DVDD V
V
IL
DGND 0.2 DVDD DGND 0.2 DVDD V
I
OH
= 1mA 0.8 DVDD 0.8 DVDD V
V
OH
I
OH
= 8mA 0.75 DVDD 0.75 DVDD V
I
OL
= 1mA 0.2 DVDD 0.2 DVDD V
V
OL
I
OL
= 8mA 0.2 DVDD 0.2 DVDD V
Input hysteresis 0.1 0.1 V
Input leakage 0 < V
DIGITAL INPUT
< DVDD ±10 ±10 μA
POWER SUPPLY
AVSS –2.6 0 –2.6 0 V
AVDD AVSS + 4.75 AVSS + 5.25 AVSS + 4.75 AVSS + 5.25 V
DVDD 2.7 5.25 2.7 5.25 V
Operating
2.3 3.8 2.3 3.8 |mA|
(reference enabled)
Sleep mode
200 200 |μA|
(reference enabled)
AVDD, AVSS current
Sleep mode
1 40 1 40 |μA|
(reference disabled)
Power-Down mode 1 40 1 40 |μA|
Operating 500 700 500 700 μA
DVDD current
(13)
Sleep mode 160 300 160 300 μA
Power-Down mode
(14)
1 10 1 10 μA
Operating 13 22 13 22 mW
Sleep mode
1.5 1.5 mW
(reference enabled)
Power dissipation
Sleep mode
0.5 1.2 0.5 1.2 mW
(reference disabled)
Power-Down mode 10 240 10 240 μW
TEMPERATURE RANGE
Specified temperature range –40 +105 –40 +105 °C
Operating temperature range –40 +125 –40 +125 °C
Storage temperature range –60 +150 –60 +150 °C
(12) Crystal operation using 18pF load capacitors.
(13) Specified with internal oscillator operating (internal oscillator current: 40µA, typ).
(14) External CLKIN, SCLK stopped. Digital inputs maintained at V
IH
or V
IL
voltage levels.
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