Datasheet

15
LT1790
1790fa
Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options,
the curves can be estimated based on the 2.5V and 5V curves.
–2.5V Characteristics
Long-Term Drift
(Data Points Reduced After 500 Hr)
Output Noise 0.1Hz to 10Hz Output Voltage Noise Spectrum
2.5V TYPICAL PERFOR A CE CHARACTERISTICS
UW
OUTPUT TO GROUND VOLTAGE (V)
0
0
CURRENT IN R
L
(mA)
0.05
0.10
0.15
0.20
–1.0–2.0–3.0
–4.0
17902.5 G10
0.25
0.30
–0.5–1.5–2.5
–3.5
T
A
= 25°C
T
A
= 125°C
T
A
= –55°C
–V
EE
V
OUT
3V
R
L
5k
4
1, 2
6
1µF
LT1790-2.5
R1 10k
TIME (SEC)
0
OUTPUT NOISE (10µV/DIV)
8
17901.5 G12
246 107135 9
HOURS
0
ppm
60
100
140
800
17902.5 G11
20
–20
40
80
120
0
–40
–60
200
400
600
1000
T
A
= 30°C
2 TYPICAL PARTS SOLDERED TO PCB
Integrated Noise 10Hz to 1kHz
FREQUENCY (Hz)
10
NOISE VOLTAGE (µV/√Hz)
10
8
6
4
2
0
100 1k 10k
1790 G05
C
L
= 1µF
I
O
= 0µA
I
O
= 1mA
I
O
= 250µA
FREQUENCY (Hz)
10
1
INTEGRATED NOISE (µV
RMS
)
10
100
100 1000
LT1790 G03