Datasheet

DAC7731
3
SBAS249B
www.ti.com
DAC7731E DAC7731EB DAC7731EC
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
ACCURACY
Linearity Error (INL) ±6 ±4 ±3LSB
T
A
= 25°C ±5 ±3 ±2LSB
Differential Linearity Error (DNL) ±4 ±2 ±1LSB
Monotonicity 14 15 16 Bits
Offset Error ±0.1 ✻✻% of FSR
Offset Error Drift ±2 ✻✻ppm/°C
Gain Error With Internal REF ±0.4 ±0.25 ±0.15 % of FSR
With External REF ±0.25 ±0.1 ✻ % of FSR
Gain Error Drift With Internal REF ±15 ±10 ±7 ppm/°C
PSRR (V
CC
or V
SS
) At Full-Scale 50 200 ✻✻ ✻ ✻ppm/V
ANALOG OUTPUT
(1)
Voltage Output
(2)
+11.4/–4.75 0 to 10 ✻✻V
+11.4/–11.4 ±10 ✻✻V
+11.4/–6.4 ±5 ✻✻V
Output Current ±5 ✻✻ mA
Output Impeadance 0.1 ✻✻Ω
Maximum Load Capacitance 200 ✻✻pF
Short-Circuit Current ±15 ✻✻mA
Short-Circuit Duration AGND Indefinite ✻✻
REFERENCE
Reference Output 9.96 10 10.04 9.975 ✻ 10.025 ✻✻ ✻ V
REF
OUT
Impedance 400 ✻✻Ω
REF
OUT
Voltage Drift ±15 ±10 ±7 ppm/°C
REF
OUT
Voltage Adjustment
(3)
±25 ✻✻ mV
REF
IN
Input Range
(4)
4.75 V
CC
– 1.4 ✻✻✻ ✻V
REF
IN
Input Current 10 ✻✻nA
REFADJ Input Range
Absolute Max Value that 010✻✻✻ ✻V
can be applied is V
CC
REFADJ Input Impedance 50 ✻✻kΩ
V
REF
Output Current –2+2✻✻✻ ✻mA
V
REF
Impedance 1 ✻✻Ω
DYNAMIC PERFORMANCE
Settling Time to ±0.003% 20V Output Step 3 5 ✻✻ ✻✻ µs
R
L
= 5kΩ, C
L
= 200pF,
with external REF
OUT
to REF
IN
filter
(5)
Digital Feedthrough 2 ✻✻nV-s
Output Noise Voltage at 10kHz 100 ✻✻nV/√Hz
DIGITAL INPUT
V
IH
|I
H
| < 10µA 0.7 • V
DD
✻✻ V
V
IL
|I
L
| < 10µA 0.3 • V
DD
✻✻V
DIGITAL OUTPUT
V
OH
I
OH
= –0.8mA 3.6 ✻✻ V
V
OL
I
OL
= 1.6mA 0.4 ✻✻V
POWER SUPPLY
V
DD
+4.75 +5.0 +5.25 ✻✻✻✻✻ ✻ V
V
CC
+11.4 +15.75 ✻✻✻ ✻V
V
SS
Bipolar Operation –15.75 –11.4 ✻✻✻ ✻V
Unipolar Opeation –15.75 –4.75 ✻✻✻ ✻V
I
DD
100 ✻✻µA
I
CC
Unloaded 4 6 ✻✻ ✻✻ mA
I
SS
Unloaded –4 –2.5 ✻✻ ✻✻ mA
Power
No Load, Ext. Reference 85 ✻✻mW
No Load, Int. Reference 100 150 ✻✻ ✻✻mW
TEMPERATURE RANGE
Specified Performance –40 +85 ✻✻✻ ✻°C
✻ Specifications same as grade to the left.
NOTES: (1)
With minimum V
CC
/V
SS
requirements, internal reference enabled.
(2) Please refer to the
Theory of Operation section for more information with respect to output voltage configurations.
(3) See Figure 11 for gain and offset adjustment connection diagrams when using the internal reference.
(4) The minimum value for REF
IN
must be equal to the greater of V
SS
+14V and +4.75V, where +4.75V is the minimum voltage allowed.
(5) Reference low-pass filter values: 100kΩ, 1.0µF (see Figure 14).
ELECTRICAL CHARACTERISTICS
All specifications at T
A
= T
MIN
to T
MAX
, V
CC
= +15V, V
SS
= –15V, V
DD
= +5V, Internal refi⁄ence enabled, unless otherwise noted.