Datasheet
DAC7678
www.ti.com
SBAS493B –FEBRUARY 2010–REVISED JULY 2012
ELECTRICAL CHARACTERISTICS
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
STATIC PERFORMANCE
(1)
Resolution 12 Bits
Relative accuracy Measured by the line passing through codes 30 and 4050 ±0.3 ±1 LSB
Differential nonlinearity 12-bit monotonic ±0.1 ±0.25 LSB
Offset error Extrapolated from two-point line
(2)
, unloaded 0.5 ±4 mV
Offset error drift 3 μV/°C
Full-scale error DAC register loaded with all '1's ±0.03 ±0.2 % of FSR
Full-scale error drift 2 μV/°C
Zero-code error DAC register loaded with all '0's 1 4 mV
Zero-code error drift 2 μV/°C
Gain error Extrapolated from two-point line
(2)
, unloaded ±0.01 ±0.15 % of FSR
ppm of
Gain temperature coefficient ±1
FSR/°C
OUTPUT CHARACTERISTICS
(3)
Output voltage range 0 AV
DD
V
DACs unloaded, 1/4 scale to 3/4 scale 7 μs
Output voltage settling time
R
L
= 1MΩ, C
L
= 470 pF 12 μs
Slew rate 0.75 V/μs
R
L
= ∞ 470 pF
Capacitive load stability
R
L
= 2kΩ 1000 pF
Code change glitch impulse 1LSB change around major carry 0.15 nV-s
Digital feedthrough SCL toggling 1.5 nV-s
Power-on glitch R
L
= ∞ 3 mV
Channel-to-channel dc crosstalk Full-scale swing on adjacent channel 0.1 LSB
DC output impedance At midscale input 4.5 Ω
Short-circuit current DAC outputs shorted to GND 25 mA
Power-up time (including settling time) Coming out of power-down mode, AV
DD
= 5V 50 μs
AC PERFORMANCE
(3)
DAC output noise density T
A
= +25°C, at zero-code input, f
OUT
= 1kHz 20 nV/√Hz
T
A
= +25°C, at midscale input, 0.1Hz to 10Hz (external
DAC output noise 3 μV
PP
reference used)
(1) Linearity calculated using a reduced code range; output unloaded.
(2) 12-bit: 30 and 4050
(3) Specified by design or characterization; not production tested.
Copyright © 2010–2012, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s): DAC7678