Datasheet

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SBAS325B − JUNE 2004 − REVISED APRIL 2009
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4
ELECTRICAL CHARACTERISTICS (continued)
At T
A
= +25°C, AVDD = +5V, DVDD = 3V, VREF = +4.096V, Range 5 (250pC), and continuous mode operation, unless otherwise noted.
Low-Power Mode: T
INT
= 400µs and CLK = 4MHz; High-Speed Mode: T
INT
= 320µs and CLK = 4.8MHz.
High-Speed ModeLow-Power Mode
PARAMETER UNITSMAXTYPMINMAXTYPMINTEST CONDITIONS
DIGITAL INPUT/OUTPUT
Logic Levels
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
) 0 < V
IN
< DVDD ±10 ∗ µA
Data Format
(12)
Straight Binary ∗
POWER-SUPPLY REQUIREMENTS
Analog Power-Supply Voltage (AVDD) 4.75 5.25 ∗ ∗ V
Digital Power-Supply Voltage (DVDD) 2.7 5.25 ∗ ∗ V
Supply Current
Total Analog Current 21 28 mA
Total Digital Current DVDD = +3V 1 1.34 mA
Total Power Dissipation DVDD = +3V 108 150 144 200 mW
Total Power Dissipation per Channel DVDD = +3V 13.5 18.75 18 25 mW
(1)
∗ indicates that specification is the same as Low-Power Mode.
(2)
Exceeding maximum input current specification may damage device.
(3)
Input is less than 1% of full scale.
(4)
C
SENSOR
is the capacitance seen at the DDC118 inputs from wiring, photodiode, etc.
(5)
FSR is Full-Scale Range.
(6)
A best-fit line is used in measuring nonlinearity.
(7)
Matching between side A and side B of the same input.
(8)
Ensured by design, not production tested.
(9)
Voltage produced by the DDC118 at its input which is applied to the sensor.
(10)
Range drift does not include external reference drift.
(11)
Input reference current decreases with increasing T
INT
(see the Voltage Reference section, page 11).
(12)
Data format is Straight Binary with a small offset. The number of bits in the output word is controlled by the FORMAT pin (see text).