Datasheet

ADS1194, ADS1196
ADS1198
www.ti.com SBAS471C –APRIL 2010– REVISED NOVEMBER 2011
ELECTRICAL CHARACTERISTICS (continued)
Minimum/maximum specifications apply from 0°C to +70°C. Typical specifications are at +25°C.
All specifications at DVDD = 1.8V, AVDD – AVSS = 3V, V
REF
= 2.4V, external f
CLK
= 2.048MHz, data rate = 500SPS, and
gain = 6, unless otherwise noted.
ADS1194, ADS1196, ADS1198
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SYSTEM MONITORS
Analog supply reading error 2 %
Digital supply reading error 2 %
From power-up 150 ms
Device wake up
STANDBY mode 9 ms
Temperature sensor reading, voltage 145 mV
Temperature sensor reading, coefficient 490 μV/°C
Test Signal
Signal frequency See Register Map section for settings Hz
f
CLK
/2
21
, f
CLK
/2
20
Signal voltage See Register Map section for settings ±1, ±2 mV
Accuracy ±2 %
CLOCK
Nominal frequency 2.048 MHz
Internal oscillator clock frequency T
A
= +25°C 0.5 %
0°C ≤ T
A
≤ +70°C ±2 %
Internal oscillator start-up time 20 μs
Internal oscillator power consumption 120 μW
External clock input frequency CLKSEL pin = 0 0.5 2.048 2.25 MHz
DIGITAL INPUT/OUTPUT (DVDD = 1.65V to 3.6V)
V
IH
0.8DVDD DVDD + 0.1 V
V
IL
–0.1 0.2DVDD V
Logic level V
OH
I
OH
= –500μA DVDD – 0.4 V
V
OL
I
OL
= +500μA 0.4 V
Input current (I
IN
) 0V < V
DigitalInput
< DVDD –10 +10 μA
POWER-SUPPLY REQUIREMENTS
Analog supply (AVDD – AVSS) 2.7 3 5.25 V
Digital supply (DVDD) 1.65 1.8 3.6 V
AVDD – DVDD –2.1 3.6 V
SUPPLY CURRENT (RLD, WCT, and Pace Amplifiers Turned Off)
AVDD – AVSS = 3V 1.3 mA
I
AVDD
AVDD – AVSS = 5V 1.6 mA
Normal mode (ADS1198)
DVDD = 3.0V 0.5 mA
I
DVDD
DVDD = 1.8V 0.3 mA
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Product Folder Link(s): ADS1194 ADS1196 ADS1198