Datasheet

AD673–SPECIFICATIONS
AD673J AD673S
Model Min Typ Max Min Typ Max Units
RESOLUTION 8 8 Bits
RELATIVE ACCURACY,
l
61/2 61/2 LSB
T
A
= T
MIN
to T
MAX
61/2 61/2 LSB
FULL-SCALE CALIBRATION
2
±2 ±2 LSB
UNIPOLAR OFFSET 61/2 61/2 LSB
BIPOLAR OFFSET 61/2 61/2 LSB
DIFFERENTIAL NONLINEARITY,
3
88Bits
T
A
= T
MIN
to T
MAX
88Bits
TEMPERATURE RANGE 0 +70 –55 +125 °C
TEMPERATURE COEFFICIENTS
Unipolar Offset 61 61 LSB
Bipolar Offset 61 61 LSB
Full-Scale Calibration
2
62 62 LSB
POWER SUPPLY REJECTION
Positive Supply
+4.5 ≤ V+ ≤ +5.5 V 62 62 LSB
Negative Supply
–15.75 V ≤ V– ≤ –14.25 V 62 62 LSB
–12.6 V ≤ V– ≤ –11.4 V 62 62 LSB
ANALOG INPUT IMPEDANCE 3.0 5.0 7.0 3.0 5.0 7.0 kΩ
ANALOG INPUT RANGES
Unipolar 0 +10 0 +10 V
Bipolar –5 +5 –5 +5 V
OUTPUT CODING
Unipolar Positive True Binary Positive True Binary
Bipolar Positive True Offset Binary Positive True Offset Binary
LOGIC OUTPUT
Output Sink Current
(V
OUT
= 0.4 V max, T
MIN
to T
MAX
) 3.2 3.2 mA
Output Source Current
4
(V
OUT
= 2.4 V min, T
MIN
to T
MAX
) 0.5 0.5 mA
Output Leakage 640 640 µA
LOGIC INPUTS
Input Current 6100 6100 µA
Logic “1” 2.0 2.0 V
Logic “0” 0.8 0.8 V
CONVERSION TIME, T
A
and
T
MIN
to T
MAX
10 20 30 10 20 30 µs
POWER SUPPLY
V+ +4.5 +5.0 +7.0 +4.5 +5.0 +7.0 V
V– –11.4 –15 –16.5 –11.4 –15 –16.5 V
OPERATING CURRENT
V+ 15 20 15 20 mA
V– 9 15 9 15 mA
NOTES
1
Relative accuracy is defined as the deviation of the code transition points from the ideal transfer point on a straight line from the zero to the full scale of the device.
2
Full-scale calibration is guaranteed trimmable to zero with an external 200 Ω potentiometer in place of the 15 Ω fixed resistor.
Full scale is defined as 10 volts minus 1 LSB, or 9.961 V.
3
Defined as the resolution for which no missing codes will occur.
4
The data output lines have active pull-ups to source 0 5 mA. The DATA READY line is open collector with a nominal 6 kΩ internal pull-up resistor.
Specifications subject to change without notice.
Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min
and max specifications are guaranteed, although only those shown in boldface are tested on all production units.
(T
A
= +258C, V+ = +5 V, V– = –12 V or –15 V, all voltages measured with respect to
digital common, unless otherwise noted)
REV. A
–2–