Datasheet
10 100 1000 10000 100000
f - Frequency - Hz
0
50
100
150
200
250
300
350
Ö
Voltage Noise - nV/ Hz
C
Reference Unbuffered
REF
= 0 Fm
- -
t - Time - 2s/div
15 V
Peak-to-peak
m
V - 5 V/div
noise
m
2.495
2.496
2.498
2.500
2.501
2.502
2.504
2.505
Reference Voltage - V
2.7 3.1 3.5
3.9
4.3
4.7 5.5
Supply Voltage - V
5.1
2.503
2.499
2.497
T = 125°C
A
T = 25°C
A
T = -40°C
A
2.490
2.495
2.500
2.505
2.510
2.515
Reference Voltage - V
-20 -15 -10 -5 0 5 10 15 20
Load Current - mA
T = 125°C
A
T = 25°C
A
T = -40°C
A
-250
-200
-150
-100
-50
0
50
100
150
200
250
0 240 480 720 960 1200 1440 1680 1920 2160
t - Time - Hours
Drift - ppm
19 Devices Shown
T - Temperature - C°
Reference Voltage - V
-40 -25 -10 5 20 35 50 65 80 95
110 125
2.495
2.496
2.497
2.498
2.499
2.501
2.502
2.503
2.504
2.505
2.500
22 Devices Shown
DAC7678
www.ti.com
SBAS493B –FEBRUARY 2010–REVISED JULY 2012
TYPICAL CHARACTERISTICS: INTERNAL REFERENCE
At T
A
= 25°C, unless otherwise noted
INTERNAL REFERENCE VOLTAGE
vs TEMPERATURE LONG-TERM STABILITY DRIFT
Figure 2. Figure 3.
INTERNAL REFERENCE VOLTAGE INTERNAL REFERENCE VOLTAGE
vs SUPPLY VOLTAGE vs LOAD CURRENT
Figure 4. Figure 5.
INTERNAL REFERENCE NOISE DENSITY INTERNAL REFERENCE NOISE
vs FREQUENCY 0.1 Hz to 10 Hz
Figure 6. Figure 7.
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