Datasheet

DAC7678
SBAS493B –FEBRUARY 2010–REVISED JULY 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
At AV
DD
= 2.7V to 5.5V, External Reference Used, and over –40°C to +125°C, unless otherwise noted.
DAC7678
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX
INTERNAL REFERENCE
Output voltage T
A
= +25°C 2.495 2.5 2.505 V
Initial accuracy T
A
= +25°C –5 ±0.1 5 mV
Output voltage temperature drift
(4)
5 25 ppm/°C
Output voltage noise T
A
= +25°C, f = 0.1Hz to 10Hz 15 μV
PP
T
A
= +25°C, f = 1kHz, C
L
= 0μF 250
Output voltage noise density
nV/√Hz
(high-frequency noise)
T
A
= +25°C, f = 1MHz, C
L
= 0μF 50
Sourcing, T
A
= +25°C 500 μV/mA
Load regulation
(5)
Sinking, T
A
= +25°C 200 μV/mA
Output current load capability
(4)
±20 mA
Line regulation T
A
= +25°C 80 μV/V
Long-term stability/drift (aging)
(5)
T
A
= +25°C, time = 0 to 2160 hours 100 ppm
First cycle 200 ppm
Thermal hysteresis
(5)
Additional cycles 50 ppm
AV
DD
= 5.5V 420 μA
Internal reference current consumption
AV
DD
= 3.6V 400 μA
External V
REF
= 2.5V (when internal reference is disabled), all
External reference current 60 μA
eight channels active
V
REFIN
/V
REFOUT
pin reference input range 0 AV
DD
V
Reference input impedance Reference disabled 42 kΩ
LOGIC INPUTS
(4)
Input current ±1 μA
V
IN
L Logic input LOW voltage 2.7V ≤ AV
DD
≤ 5.5V GND–0.3 0.3×AV
DD
V
V
IN
H Logic input HIGH voltage 2.7V ≤ AV
DD
≤ 5.5V 0.7×AV
DD
AV
DD
+0.3 V
Pin capacitance 1.5 3 pF
POWER REQUIREMENTS
AV
DD
2.7 5.5 V
AV
DD
= 3.6V to 5.5V, V
IN
H = AV
DD
and V
IN
L = GND 1.02 1.4 mA
Normal mode, internal
reference switched off
AV
DD
= 2.7V to 3.6V, V
IN
H = AV
DD
and V
IN
L = GND 0.86 1.3 mA
AV
DD
= 3.6V to 5.5V, V
IN
H = AV
DD
and V
IN
L = GND 1.49 2.2 mA
Normal mode, internal
I
DD
(6)
reference switched on
AV
DD
= 2.7V to 3.6V, V
IN
H = AV
DD
and V
IN
L = GND 1.32 2 mA
AV
DD
= 3.6V to 5.5V, V
IN
H = AV
DD
and V
IN
L = GND 0.42 6 μA
All power-down modes
AV
DD
= 2.7V to 3.6V, V
IN
H = AV
DD
and V
IN
L = GND 0.25 4.7 μA
AV
DD
= 3.6V to 5.5V, V
IN
H = AV
DD
and V
IN
L = GND 3.67 7.7 mW
Normal mode, internal
reference switched off
AV
DD
= 2.7V to 3.6V, V
IN
H = AV
DD
and V
IN
L = GND 2.32 4.68 mW
AV
DD
= 3.6V to 5.5V, V
IN
H = AV
DD
and V
IN
L = GND 5.36 12.1 mW
Power Normal mode, internal
dissipation
(6)
reference switched on
AV
DD
= 2.7V to 3.6V, V
IN
H = AV
DD
and V
IN
L = GND 3.56 7.2 mW
AV
DD
= 3.6V to 5.5V, V
IN
H = AV
DD
and V
IN
L = GND 1.51 33 μW
All power-down modes
AV
DD
= 2.7V to 3.6V, V
IN
H = AV
DD
and V
IN
L = GND 0.68 16.92 μW
TEMPERATURE RANGE
Specified performance –40 +125 °C
(4) Specified by design or characterization; not production tested.
(5) Explained in more detail in the Application Information section of this data sheet.
(6) Input code = midscale, no load.
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