®

7

REF1004

FIGURE 1. Low-Noise Reference.

FIGURE2. Micropower Reference from 9V Battery.

1.5V (see Note)

REF1004-1.2

3k

Ω

1.235V

NOTE: Output regulates

to 1.285V for I

FIGURE 3. 1.2V Reference from 1.5V Battery.

FIGURE 4. 2.5V Reference.

+

100µA

V

22

Ω

REF1004-1.2

Output

5µF

9V

REF1004-1.2

510k

Ω

1.235V

5V

REF1004-2.5

50k

Ω

2.5V

FIGURE 5. Lead-Acid Low-Battery-Voltage Detector.

TLC271

LO = Battery Low

12V

Battery Output

1M

Ω

R

1

(1)

1%

133k

Ω

1%

REF1004-1.2

NOTE: (1) R