Datasheet
ADS1294, ADS1294R
ADS1296, ADS1296R
ADS1298, ADS1298R
SBAS459I –JANUARY 2010–REVISED JANUARY 2012
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Minimum/maximum specifications apply for all commercial grade (0°C to +70°C) devices and from –40°C to +85°C for
industrial grades devices. Typical specifications are at +25°C. All specifications at DVDD = 1.8V, AVDD – AVSS = 3V
(1)
,
V
REF
= 2.4V, external f
CLK
= 2.048MHz, data rate = 500SPS, High-Resolution mode, and gain = 6, unless otherwise noted.
ADS1294, ADS1296, ADS1298
ADS1294R, ADS1296R, ADS1298R
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CLOCK
Internal oscillator clock frequency Nominal frequency 2.048 MHz
T
A
= +25°C ±0.5 %
0°C ≤ T
A
≤ +70°C ±2 %
Internal clock accuracy
–40°C ≤ T
A
≤ +85°C,
±2.5 %
ADS1298I industrial grade version only
Internal oscillator start-up time 20 μs
Internal oscillator power consumption 120 μW
External clock input frequency CLKSEL pin = 0 1.94 2.048 2.25 MHz
DIGITAL INPUT/OUTPUT (DVDD = 1.65V to 3.6V)
Logic level
V
IH
0.8DVDD DVDD + 0.1 V
V
IL
–0.1 0.2DVDD V
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 3.0 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)
High-Resolution mode (ADS1298)
AVDD – AVSS = 3V 2.75 mA
I
AVDD
AVDD – AVSS = 5V 3.1 mA
DVDD = 3.0V 0.5 mA
I
DVDD
DVDD = 1.8V 0.3 mA
Low-Power mode (ADS1298)
AVDD – AVSS = 3V 1.8 mA
I
AVDD
AVDD – AVSS = 5V 2.1 mA
DVDD = 3.0V 0.5 mA
I
DVDD
DVDD = 1.8V 0.3 mA
POWER DISSIPATION (Analog Supply = 3V, RLD, WCT, and PACE Amplifiers Turned Off)
Quiescent power dissipation
High-Resolution mode 8.8 9.5 mW
ADS1298/8R
Low-Power mode (250SPS) 6.0 7.0 mW
High-Resolution mode 7.2 7.9 mW
ADS1296/6R
Low-Power mode 5.3 6.6 mW
High-Resolution mode 5.4 6 mW
ADS1294/4R
Low-Power mode 4.1 4.4 mW
Power-down 10 μW
Standby mode 2 mW
Quiescent channel power PGA + ADC 818 μW
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Product Folder Link(s): ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R