Datasheet

13
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.
2.048V TYPICAL PERFOR A CE CHARACTERISTICS
U
W
–2.048V Characteristics Long-Term Drift
Output Noise 0.1Hz to 10Hz
Output Voltage Noise Spectrum
OUTPUT TO GROUND VOLTAGE (V)
0
CURRENT IN R
L
(mA)
0.10
0.20
0.30
0.05
0.15
0.25
–3.5 –3 –2.5 –2 –1.5 –1 –0.5
17092.048 G10
0–4
–V
EE
V
OUT
3V
R
L
5k
4
21
6
1µF
LT1790-2.048
R1 10k
T
A
= 125°C
T
A
= 25°C
T
A
= –55°C
FREQUENCY (Hz)
10
4
NOISE VOLTAGE (µV/√Hz)
5
6
7
8
100 1k 10k
17902.048 G13
3
2
1
0
9
10
C
L
= 1µF
I
O
= 100µA
I
O
= 0µA
I
O
= 250µA
I
O
= 1mA
TIME (SEC)
0
OUTPUT NOISE (10µV/DIV)
8
17902.048 G12
246 107135 9
HOURS
0
ppm
60
100
800
17901.048 G11
20
–20
40
80
0
–40
–60
–80
–100
200
400
600
1000
T
A
= 30°C
2 TYPICAL PARTS SOLDERED TO PCB
Integrated Noise 10Hz to 1kHz
FREQUENCY (Hz)
10
1
INTEGRATED NOISE (µV
RMS
)
10
100
100 1000
LT1790 G02