Datasheet

4
LT1790
1790fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage (Notes 3, 4) LT1790A 2.04697 2.048 2.04902 V
–0.05 0.05 %
LT1790B 2.04595 2.048 2.05005 V
–0.10 0.10 %
LT1790AC ● 2.04554 2.048 2.05046 V
● –0.120 0.120 %
LT1790AI ● 2.04442 2.048 2.05158 V
● –0.175 0.175 %
LT1790BC ● 2.04237 2.048 2.05363 V
● –0.275 0.275 %
LT1790BI ● 2.03955 2.048 2.05645 V
● –0.4125 0.4125 %
Output Voltage Temperature Coefficient (Note 5) T
MIN
≤ T
A
≤ T
MAX
LT1790A ● 5 10 ppm/°C
LT1790B ● 12 25 ppm/°C
Line Regulation 2.8V ≤ V
IN
≤ 18V 50 170 ppm/V
● 220 ppm/V
Load Regulation (Note 6) I
OUT
Source = 5mA 120 200 ppm/mA
● 280 ppm/mA
I
OUT
Sink = 3mA 130 260 ppm/mA
● 450 ppm/mA
Dropout Voltage (Note 7) V
IN
– V
OUT
, ∆V
OUT
= 0.1%
I
OUT
= 0mA 50 100 mV
● 500 mV
I
OUT
Source = 5mA ● 750 mV
I
OUT
Sink = 3mA ● 450 mV
Supply Current No Load 35 60 µA
● 75 µA
Minimum Operating Current— V
OUT
= –2.048V, 0.1% 100 125 µA
Negative Output (See Figure 7)
Turn-On Time C
LOAD
= 1µF 350 µs
Output Noise (Note 8) 0.1Hz ≤ f ≤ 10Hz 22 µV
P-P
10Hz ≤ f ≤ 1kHz 41 µV
RMS
Long-Term Drift of Output Voltage (Note 9) 50 ppm/√kHr
Hysteresis (Note 10) ∆T = 0°C to 70°C ● 40 ppm
∆T = –40°C to 85°C
● 100 ppm
The ● denotes specifications that apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. C
L
= 1µF and V
IN
= 2.8V, unless otherwise noted.
2.048V ELECTRICAL CHARACTERISTICS