Datasheet

3
LT1790
1790fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage (Notes 3, 4) LT1790A 1.24937 1.250 1.25062 V
–0.05 0.05 %
LT1790B 1.24875 1.250 1.25125 V
–0.10 0.10 %
LT1790AC ● 1.24850 1.250 1.25150 V
● –0.120 0.120 %
LT1790AI ● 1.24781 1.250 1.25219 V
● –0.175 0.175 %
LT1790BC ● 1.24656 1.250 1.25344 V
● –0.275 0.275 %
LT1790BI ● 1.24484 1.250 1.25516 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 2.6V ≤ V
IN
≤ 18V 50 170 ppm/V
● 220 ppm/V
Load Regulation (Note 6) I
OUT
Source = 5mA, V
IN
= 2.8V 100 160 ppm/mA
● 250 ppm/mA
I
OUT
Sink = 1mA, V
IN
= 3.2V 120 180 ppm/mA
● 250 ppm/mA
Minimum Operating Voltage (Note 7) V
IN
, ∆V
OUT
= 0.1%
I
OUT
= 0mA 1.95 2.15 V
● 2.50 V
I
OUT
Source = 5mA ● 2.90 V
I
OUT
Sink = 1mA ● 2.95 V
Supply Current No Load 35 60 µA
● 75 µA
Minimum Operating Current— V
OUT
= –1.25V, ±0.1% 100 125 µA
Negative Output (See Figure 7)
Turn-On Time C
LOAD
= 1µF 250 µs
Output Noise (Note 8) 0.1Hz ≤ f ≤ 10Hz 10 µV
P-P
10Hz ≤ f ≤ 1kHz 14 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
= 2.6V, unless otherwise noted.
1.25V ELECTRICAL CHARACTERISTICS