ADS1299
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SBAS499A –JULY 2012–REVISED AUGUST 2012
ELECTRICAL CHARACTERISTICS (continued)
Minimum and maximum specifications apply from –40°C to +85°C. Typical specifications are at +25°C. All specifications are
at DVDD = 3.3 V, AVDD – AVSS = 5 V, VREF = 4.5 V, external fCLK = 2.048 MHz, data rate = 250 SPS, and gain = 12, unless
otherwise noted.
ADS1299
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CLOCK
Internal oscillator clock frequency
Internal clock accuracy
Nominal frequency
2.048
MHz
%
TA = +25°C
±0.5
±2.5
–40°C ≤ TA ≤ +85°C
%
Internal oscillator start-up time
Internal oscillator power consumption
External clock input frequency
20
120
μs
μW
MHz
CLKSEL pin = 0
1.5
2.048
2.25
DIGITAL INPUT/OUTPUT (DVDD = 1.8 V to 3.6 V)
VIH
VIL
High
Low
High
Low
0.8 DVDD
–0.1
DVDD + 0.1
0.2 DVDD
V
V
Logic level,
input voltage
VOH
VOL
IIN
IOH = –500 μA
0.9 DVDD
V
Logic level,
output voltage
IOL = +500 μA
0.1 DVDD
+10
V
Input current
0 V < VDigitalInput < DVDD
–10
μA
POWER-SUPPLY REQUIREMENTS
Analog supply (AVDD – AVSS)
4.75
1.8
5
5.25
3.6
V
V
V
DVDD
Digital supply
1.8
AVDD – DVDD
–2.1
3.6
SUPPLY CURRENT (Bias Turned Off)
IAVDD
AVDD – AVSS = 5 V
DVDD = 3.3 V
7.14
1
mA
mA
mA
Normal mode
IDVDD
DVDD = 1.8 V
0.5
POWER DISSIPATION (Analog Supply = 5 V, Bias Amplifiers Turned Off)
Normal mode
39
10
42
mW
μW
Quiescent power dissipation
Power-down
Standby mode, internal reference
5.1
mW
Quiescent power dissipation,
per channel
Normal mode
4.3
mW
TEMPERATURE
Specified
Operating
Storage
–40
–40
–60
+85
+85
°C
°C
°C
Temperature
range
+150
THERMAL INFORMATION
ADS1299
THERMAL METRIC(1)
PAG
64 PINS
43.3
UNITS
θJA
Junction-to-ambient thermal resistance
θJCtop
θJB
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
36.5
60.6
°C/W
ψJT
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
0.1
ψJB
19.5
θJCbot
n/a
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
Copyright © 2012, Texas Instruments Incorporated
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