Datasheet

ADS1158
SBAS429D –JUNE 2008– REVISED MARCH 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T
A
= –40°C to +105°C, AVDD = +2.5V, AVSS = –2.5V, DVDD = +3.3V, f
CLK
= 16MHz (external clock) or
f
CLK
= 15.729MHz (internal clock), OPA227 buffer between MUX outputs and ADC inputs, V
REF
= +4.096V, and VREFN
= –2.5V, unless otherwise noted.
ADS1158
PARAMETER CONDITIONS MIN TYP MAX UNIT
DIGITAL INPUT/OUTPUT
V
IH
0.7DVDD DVDD V
V
IL
DGND 0.3DVDD V
Logic levels
V
OH
I
OH
= 2mA 0.8DVDD DVDD V
V
OL
I
OL
= 2mA DGND 0.2DVDD V
Input leakage V
IN
= DVDD, GND 10 μA
Frequency 0.1 16 MHz
Master clock input (CLKIO)
Duty cycle 40 60 %
Crystal frequency 32.768 kHz
Clock output frequency 15.729 MHz
Crystal oscillator
(see Crystal Oscillator section)
Start-up time (clock output valid) 150 ms
Clock output duty cycle 40 60 %
POWER SUPPLY
DVDD 2.7 5.25 V
AVSS –2.6 0 V
AVDD AVSS + 4.75 AVSS + 5.25 V
External clock
0.25 0.6 mA
operation
Internal oscillator
operation, clock 0.04 mA
output disabled
DVDD supply current
Internal oscillator
operation, clock 1.4 mA
output enabled
(6)
Power-down
(7)
1 25 µA
Converting 8.2 12 mA
Standby 5.6 mA
AVDD, AVSS supply current
Sleep 2.1 mA
Power-down 2 200 µA
Converting 42 62 mW
Standby 29 mW
Power dissipation
Sleep 11 mW
Power-down 14 μW
(6) CLKIO load = 20pF.
(7) No clock applied to CLKIO.
4 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated
Product Folder Link(s): ADS1158