Datasheet

14
LT1790
1790fa
Output Voltage Temperature Drift
Load Regulation (Sourcing)
Minimum Input-Output Voltage
Differential (Sinking)
Load Regulation (Sinking)
Supply Current vs Input Voltage
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.
Line Regulation
Output Impedance vs Frequency
Power Supply Rejection Ratio
vs Frequency
2.5V TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
30 70
17902.5 G01
–30 –10
50 90
110
2.508
2.506
2.504
2.502
2.500
2.498
2.496
2.494
10
130
FOUR TYPICAL PARTS
INPUT-OUTPUT VOLTAGE (V)
0 0.1 0.2
0.1
OUTPUT CURRENT (mA)
1
10
0.3 0.4 0.5 0.6
17902.5 G02
T
A
= –55°CT
A
= 125°C
T
A
= 25°C
TEMPERATURE (°C)
–50
–30
VOLTAGE DIFFERENTIAL (mV)
–10
30
50
70
–10
30
50 130
17902.5 G03
10
–30 10
70
90
110
90
100µA
5mA
1mA
OUTPUT CURRENT (mA)
0.1
–2000
OUTPUT VOLTAGE CHANGE (ppm)
–1600
–1200
–800
–400
110
17902.5 G04
0
–1800
–1400
–1000
–600
–200
T
A
= 25°C
T
A
= 125°C
T
A
= –55°C
OUTPUT CURRENT (mA)
0.1
0
OUTPUT VOLTAGE CHANGE (ppm)
400
800
1200
1600
110
17902.5 G05
2000
200
600
1000
1400
1800
T
A
= –55°C
T
A
= 25°C
T
A
= 125°C
INPUT VOLTAGE (V)
0
SUPPLY CURRENT (µA)
40
50
60
20
17902.5 G06
30
20
0
5
10
15
10
80
70
T
A
= –55°C
T
A
= 25°C
T
A
= 125°C
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.515
2.510
2.505
2.500
2.495
2.490
2.489
4 8 12 16
17902.5 G07
2020 6 10 14 18
T
A
= –55°C
T
A
= 25°C
T
A
= 125°C
FREQUENCY (Hz)
POWER SUPPLY REJECTION RATIO (dB)
–40
–20
–30
0
20
–50
–80
–60
–70
–10
10
100 10k 100k 1M
17902.5 G08
1k
C
L
= 1µF
FREQUENCY (Hz)
100
1
OUTPUT IMPEDANCE (Ω)
10
100
1000
1k 10k 100k
17902.5 G09
C
L
= 4.7µF
C
L
= 0.47µF
C
L
= 1µF
Minimum Input-Output Voltage
Differential (Sourcing)