Datasheet

®
7
REF1004
FIGURE 1. Low-Noise Reference.
FIGURE2. Micropower Reference from 9V Battery.
1.5V (see Note)
REF1004-1.2
3kΩ
1.235V
NOTE: Output regulates
to 1.285V for I
O
= 0.
FIGURE 3. 1.2V Reference from 1.5V Battery.
FIGURE 4. 2.5V Reference.
+
100µA
V
I
≥ 5V
22Ω
REF1004-1.2
Output
5µF
9V
REF1004-1.2
510kΩ
1.235V
5V
REF1004-2.5
50kΩ
2.5V
FIGURE 5. Lead-Acid Low-Battery-Voltage Detector.
TLC271
LO = Battery Low
12V
Battery Output
1MΩ
R
1
(1)

1%
133kΩ
1%
REF1004-1.2
NOTE: (1) R
1
sets trip point, 60.4kΩ per cell for 1.8V per cell.