Datasheet

LT1004-1.2, LT1004-2.5
MICROPOWER INTEGRATED VOLTAGE REFERENCES
SLVS022M − JANUARY 1989 − REVISED MAY 2008
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
Figure 22. 2.5-V Reference
5 V
50 kΩ
2.5 V
LT1004-2.5
Figure 23. High-Stability 5-V Regulator
+
V
I
≥ 8 V
10 µF
IN OUT
LT1084
ADJ
5 V
+
10 µF
301 Ω
1%
100 Ω
1%
LT1004-2.5
Figure 24. Ground-Referenced Current Source
15 V
2 kΩ
†
LT1004-1.2
TLE2027
−
+
R1
(see Note A)
−5 V
I
O
(see Note A)
†
May be increased for small output currents
NOTE A: R1 ≈
2 V
I
O
+ 10 µA
, I
O
=
1.235 V
R1
Figure 25. Amplifier With Constant Gain
Over Temperature
V
CC+
≥ 5 V
Output
2N3904
60 kΩ
V
CC−
≤ −5 V
250 kΩ250 kΩ
Input
LT1004-1.2
200 kΩ
Figure 26. 1.2-V Reference From 1.5-V Battery
1.5 V (see Note A)
3 kΩ
1.235 V
LT1004-1.2
NOTE A: Output regulates down to 1.285 V for I
O
= 0.
Figure 27. Terminal Current Source
With Low Temperature Coefficient
V+
R
6.8 kΩ
R ≤ 5 kΩ
LT1004-1.2
LM334
I
O
≈
1.3 V
R