Datasheet

ADS1258-EP
SBAS445D –MARCH 2009– REVISED MARCH 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T
A
= –55°C to 125°C, AVDD = 2.5 V, AVSS = –2.5 V, DVDD = 3.3 V, f
CLK
= 16 MHz (external clock) or
f
CLK
= 15.729 MHz (internal clock), OPA227 buffer between MUX outputs and ADC inputs, V
REF
= 4.096 V, and VREFN
= –2.5 V, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP
(1)
MAX UNIT
Digital Input/Output
V
IH
0.7 DVDD DVDD V
V
IL
DGND 0.3 DVDD V
Logic Levels
V
OH
I
OH
= 2 mA 0.8 DVDD DVDD V
V
OL
I
OL
= 2 mA DGND 0.2 DVDD 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 the Crystal Oscillator
Start-Up Time (Clock Output 150 mS
section)
Valid)
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 T
A
= –40°C to 105°C 0.25 0.6
Clock mA
T
A
= –55°C to 125°C 0.25 0.75
Operation
Internal Oscillator Operation,
0.04 mA
DVDD Supply Current
Clock Output Disabled
Internal Oscillator Operation,
1.4 mA
Clock Output Enabled
(4)
Power-Down
(5)
1 25 µA
Converting 8.2 12 mA
Standby 5.6 mA
AVDD, AVSS Supply Current
Sleep 2.1 mA
Power-Down 2 85 µA
Converting 42 62 mW
Standby 29 mW
Power Dissipation
Sleep 11 mW
Power-Down 14 μW
(4) CLKIO load = 20 pF.
(5) No clock applied to CLKIO.
4 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): ADS1258-EP